]>
Commit | Line | Data |
---|---|---|
1d09f67e TL |
1 | // Licensed to the Apache Software Foundation (ASF) under one |
2 | // or more contributor license agreements. See the NOTICE file | |
3 | // distributed with this work for additional information | |
4 | // regarding copyright ownership. The ASF licenses this file | |
5 | // to you under the Apache License, Version 2.0 (the | |
6 | // "License"); you may not use this file except in compliance | |
7 | // with the License. You may obtain a copy of the License at | |
8 | // | |
9 | // http://www.apache.org/licenses/LICENSE-2.0 | |
10 | // | |
11 | // Unless required by applicable law or agreed to in writing, | |
12 | // software distributed under the License is distributed on an | |
13 | // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
14 | // KIND, either express or implied. See the License for the | |
15 | // specific language governing permissions and limitations | |
16 | // under the License. | |
17 | ||
18 | // Ensure 64-bit off_t for platforms where it matters | |
19 | #ifdef _FILE_OFFSET_BITS | |
20 | #undef _FILE_OFFSET_BITS | |
21 | #endif | |
22 | ||
23 | #define _FILE_OFFSET_BITS 64 | |
24 | ||
25 | #if defined(sun) || defined(__sun) | |
26 | // According to https://bugs.python.org/issue1759169#msg82201, __EXTENSIONS__ | |
27 | // is the best way to enable modern POSIX APIs, such as posix_madvise(), on Solaris. | |
28 | // (see also | |
29 | // https://github.com/illumos/illumos-gate/blob/master/usr/src/uts/common/sys/mman.h) | |
30 | #undef __EXTENSIONS__ | |
31 | #define __EXTENSIONS__ | |
32 | #endif | |
33 | ||
34 | #include "arrow/util/windows_compatibility.h" // IWYU pragma: keep | |
35 | ||
36 | #include <algorithm> | |
37 | #include <cerrno> | |
38 | #include <cstdint> | |
39 | #include <cstring> | |
40 | #include <iostream> | |
41 | #include <random> | |
42 | #include <sstream> | |
43 | #include <string> | |
44 | #include <thread> | |
45 | #include <utility> | |
46 | #include <vector> | |
47 | ||
48 | #include <fcntl.h> | |
49 | #include <signal.h> | |
50 | #include <stdlib.h> | |
51 | #include <sys/stat.h> | |
52 | #include <sys/types.h> // IWYU pragma: keep | |
53 | ||
54 | // ---------------------------------------------------------------------- | |
55 | // file compatibility stuff | |
56 | ||
57 | #ifdef _WIN32 | |
58 | #include <io.h> | |
59 | #include <share.h> | |
60 | #else // POSIX-like platforms | |
61 | #include <dirent.h> | |
62 | #endif | |
63 | ||
64 | #ifdef _WIN32 | |
65 | #include "arrow/io/mman.h" | |
66 | #undef Realloc | |
67 | #undef Free | |
68 | #else // POSIX-like platforms | |
69 | #include <sys/mman.h> | |
70 | #include <unistd.h> | |
71 | #endif | |
72 | ||
73 | // define max read/write count | |
74 | #ifdef _WIN32 | |
75 | #define ARROW_MAX_IO_CHUNKSIZE INT32_MAX | |
76 | #else | |
77 | ||
78 | #ifdef __APPLE__ | |
79 | // due to macOS bug, we need to set read/write max | |
80 | #define ARROW_MAX_IO_CHUNKSIZE INT32_MAX | |
81 | #else | |
82 | // see notes on Linux read/write manpage | |
83 | #define ARROW_MAX_IO_CHUNKSIZE 0x7ffff000 | |
84 | #endif | |
85 | ||
86 | #endif | |
87 | ||
88 | #include "arrow/buffer.h" | |
89 | #include "arrow/result.h" | |
90 | #include "arrow/util/checked_cast.h" | |
91 | #include "arrow/util/io_util.h" | |
92 | #include "arrow/util/logging.h" | |
93 | ||
94 | // For filename conversion | |
95 | #if defined(_WIN32) | |
96 | #include "arrow/util/utf8.h" | |
97 | #endif | |
98 | ||
99 | namespace arrow { | |
100 | ||
101 | using internal::checked_cast; | |
102 | ||
103 | namespace internal { | |
104 | ||
105 | namespace { | |
106 | ||
107 | template <typename CharT> | |
108 | std::basic_string<CharT> ReplaceChars(std::basic_string<CharT> s, CharT find, CharT rep) { | |
109 | if (find != rep) { | |
110 | for (size_t i = 0; i < s.length(); ++i) { | |
111 | if (s[i] == find) { | |
112 | s[i] = rep; | |
113 | } | |
114 | } | |
115 | } | |
116 | return s; | |
117 | } | |
118 | ||
119 | Result<NativePathString> StringToNative(const std::string& s) { | |
120 | #if _WIN32 | |
121 | return ::arrow::util::UTF8ToWideString(s); | |
122 | #else | |
123 | return s; | |
124 | #endif | |
125 | } | |
126 | ||
127 | #if _WIN32 | |
128 | Result<std::string> NativeToString(const NativePathString& ws) { | |
129 | return ::arrow::util::WideStringToUTF8(ws); | |
130 | } | |
131 | #endif | |
132 | ||
133 | #if _WIN32 | |
134 | const wchar_t kNativeSep = L'\\'; | |
135 | const wchar_t kGenericSep = L'/'; | |
136 | const wchar_t* kAllSeps = L"\\/"; | |
137 | #else | |
138 | const char kNativeSep = '/'; | |
139 | const char kGenericSep = '/'; | |
140 | const char* kAllSeps = "/"; | |
141 | #endif | |
142 | ||
143 | NativePathString NativeSlashes(NativePathString s) { | |
144 | return ReplaceChars(std::move(s), kGenericSep, kNativeSep); | |
145 | } | |
146 | ||
147 | NativePathString GenericSlashes(NativePathString s) { | |
148 | return ReplaceChars(std::move(s), kNativeSep, kGenericSep); | |
149 | } | |
150 | ||
151 | NativePathString NativeParent(const NativePathString& s) { | |
152 | auto last_sep = s.find_last_of(kAllSeps); | |
153 | if (last_sep == s.length() - 1) { | |
154 | // Last separator is a trailing separator, skip all trailing separators | |
155 | // and try again | |
156 | auto before_last_seps = s.find_last_not_of(kAllSeps); | |
157 | if (before_last_seps == NativePathString::npos) { | |
158 | // Only separators in path | |
159 | return s; | |
160 | } | |
161 | last_sep = s.find_last_of(kAllSeps, before_last_seps); | |
162 | } | |
163 | if (last_sep == NativePathString::npos) { | |
164 | // No (other) separator in path | |
165 | return s; | |
166 | } | |
167 | // There may be multiple contiguous separators, skip all of them | |
168 | auto before_last_seps = s.find_last_not_of(kAllSeps, last_sep); | |
169 | if (before_last_seps == NativePathString::npos) { | |
170 | // All separators are at start of string, keep them all | |
171 | return s.substr(0, last_sep + 1); | |
172 | } else { | |
173 | return s.substr(0, before_last_seps + 1); | |
174 | } | |
175 | } | |
176 | ||
177 | Status ValidatePath(const std::string& s) { | |
178 | if (s.find_first_of('\0') != std::string::npos) { | |
179 | return Status::Invalid("Embedded NUL char in path: '", s, "'"); | |
180 | } | |
181 | return Status::OK(); | |
182 | } | |
183 | ||
184 | } // namespace | |
185 | ||
186 | std::string ErrnoMessage(int errnum) { return std::strerror(errnum); } | |
187 | ||
188 | #if _WIN32 | |
189 | std::string WinErrorMessage(int errnum) { | |
190 | char buf[1024]; | |
191 | auto nchars = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, | |
192 | NULL, errnum, 0, buf, sizeof(buf), NULL); | |
193 | if (nchars == 0) { | |
194 | // Fallback | |
195 | std::stringstream ss; | |
196 | ss << "Windows error #" << errnum; | |
197 | return ss.str(); | |
198 | } | |
199 | return std::string(buf, nchars); | |
200 | } | |
201 | #endif | |
202 | ||
203 | namespace { | |
204 | ||
205 | const char kErrnoDetailTypeId[] = "arrow::ErrnoDetail"; | |
206 | ||
207 | class ErrnoDetail : public StatusDetail { | |
208 | public: | |
209 | explicit ErrnoDetail(int errnum) : errnum_(errnum) {} | |
210 | ||
211 | const char* type_id() const override { return kErrnoDetailTypeId; } | |
212 | ||
213 | std::string ToString() const override { | |
214 | std::stringstream ss; | |
215 | ss << "[errno " << errnum_ << "] " << ErrnoMessage(errnum_); | |
216 | return ss.str(); | |
217 | } | |
218 | ||
219 | int errnum() const { return errnum_; } | |
220 | ||
221 | protected: | |
222 | int errnum_; | |
223 | }; | |
224 | ||
225 | #if _WIN32 | |
226 | const char kWinErrorDetailTypeId[] = "arrow::WinErrorDetail"; | |
227 | ||
228 | class WinErrorDetail : public StatusDetail { | |
229 | public: | |
230 | explicit WinErrorDetail(int errnum) : errnum_(errnum) {} | |
231 | ||
232 | const char* type_id() const override { return kWinErrorDetailTypeId; } | |
233 | ||
234 | std::string ToString() const override { | |
235 | std::stringstream ss; | |
236 | ss << "[Windows error " << errnum_ << "] " << WinErrorMessage(errnum_); | |
237 | return ss.str(); | |
238 | } | |
239 | ||
240 | int errnum() const { return errnum_; } | |
241 | ||
242 | protected: | |
243 | int errnum_; | |
244 | }; | |
245 | #endif | |
246 | ||
247 | const char kSignalDetailTypeId[] = "arrow::SignalDetail"; | |
248 | ||
249 | class SignalDetail : public StatusDetail { | |
250 | public: | |
251 | explicit SignalDetail(int signum) : signum_(signum) {} | |
252 | ||
253 | const char* type_id() const override { return kSignalDetailTypeId; } | |
254 | ||
255 | std::string ToString() const override { | |
256 | std::stringstream ss; | |
257 | ss << "received signal " << signum_; | |
258 | return ss.str(); | |
259 | } | |
260 | ||
261 | int signum() const { return signum_; } | |
262 | ||
263 | protected: | |
264 | int signum_; | |
265 | }; | |
266 | ||
267 | } // namespace | |
268 | ||
269 | std::shared_ptr<StatusDetail> StatusDetailFromErrno(int errnum) { | |
270 | return std::make_shared<ErrnoDetail>(errnum); | |
271 | } | |
272 | ||
273 | #if _WIN32 | |
274 | std::shared_ptr<StatusDetail> StatusDetailFromWinError(int errnum) { | |
275 | return std::make_shared<WinErrorDetail>(errnum); | |
276 | } | |
277 | #endif | |
278 | ||
279 | std::shared_ptr<StatusDetail> StatusDetailFromSignal(int signum) { | |
280 | return std::make_shared<SignalDetail>(signum); | |
281 | } | |
282 | ||
283 | int ErrnoFromStatus(const Status& status) { | |
284 | const auto detail = status.detail(); | |
285 | if (detail != nullptr && detail->type_id() == kErrnoDetailTypeId) { | |
286 | return checked_cast<const ErrnoDetail&>(*detail).errnum(); | |
287 | } | |
288 | return 0; | |
289 | } | |
290 | ||
291 | int WinErrorFromStatus(const Status& status) { | |
292 | #if _WIN32 | |
293 | const auto detail = status.detail(); | |
294 | if (detail != nullptr && detail->type_id() == kWinErrorDetailTypeId) { | |
295 | return checked_cast<const WinErrorDetail&>(*detail).errnum(); | |
296 | } | |
297 | #endif | |
298 | return 0; | |
299 | } | |
300 | ||
301 | int SignalFromStatus(const Status& status) { | |
302 | const auto detail = status.detail(); | |
303 | if (detail != nullptr && detail->type_id() == kSignalDetailTypeId) { | |
304 | return checked_cast<const SignalDetail&>(*detail).signum(); | |
305 | } | |
306 | return 0; | |
307 | } | |
308 | ||
309 | // | |
310 | // PlatformFilename implementation | |
311 | // | |
312 | ||
313 | struct PlatformFilename::Impl { | |
314 | Impl() = default; | |
315 | explicit Impl(NativePathString p) : native_(NativeSlashes(std::move(p))) {} | |
316 | ||
317 | NativePathString native_; | |
318 | ||
319 | // '/'-separated | |
320 | NativePathString generic() const { return GenericSlashes(native_); } | |
321 | }; | |
322 | ||
323 | PlatformFilename::PlatformFilename() : impl_(new Impl{}) {} | |
324 | ||
325 | PlatformFilename::~PlatformFilename() {} | |
326 | ||
327 | PlatformFilename::PlatformFilename(Impl impl) : impl_(new Impl(std::move(impl))) {} | |
328 | ||
329 | PlatformFilename::PlatformFilename(const PlatformFilename& other) | |
330 | : PlatformFilename(Impl{other.impl_->native_}) {} | |
331 | ||
332 | PlatformFilename::PlatformFilename(PlatformFilename&& other) | |
333 | : impl_(std::move(other.impl_)) {} | |
334 | ||
335 | PlatformFilename& PlatformFilename::operator=(const PlatformFilename& other) { | |
336 | this->impl_.reset(new Impl{other.impl_->native_}); | |
337 | return *this; | |
338 | } | |
339 | ||
340 | PlatformFilename& PlatformFilename::operator=(PlatformFilename&& other) { | |
341 | this->impl_ = std::move(other.impl_); | |
342 | return *this; | |
343 | } | |
344 | ||
345 | PlatformFilename::PlatformFilename(const NativePathString& path) | |
346 | : PlatformFilename(Impl{path}) {} | |
347 | ||
348 | PlatformFilename::PlatformFilename(const NativePathString::value_type* path) | |
349 | : PlatformFilename(NativePathString(path)) {} | |
350 | ||
351 | bool PlatformFilename::operator==(const PlatformFilename& other) const { | |
352 | return impl_->native_ == other.impl_->native_; | |
353 | } | |
354 | ||
355 | bool PlatformFilename::operator!=(const PlatformFilename& other) const { | |
356 | return impl_->native_ != other.impl_->native_; | |
357 | } | |
358 | ||
359 | const NativePathString& PlatformFilename::ToNative() const { return impl_->native_; } | |
360 | ||
361 | std::string PlatformFilename::ToString() const { | |
362 | #if _WIN32 | |
363 | auto result = NativeToString(impl_->generic()); | |
364 | if (!result.ok()) { | |
365 | std::stringstream ss; | |
366 | ss << "<Unrepresentable filename: " << result.status().ToString() << ">"; | |
367 | return ss.str(); | |
368 | } | |
369 | return *std::move(result); | |
370 | #else | |
371 | return impl_->generic(); | |
372 | #endif | |
373 | } | |
374 | ||
375 | PlatformFilename PlatformFilename::Parent() const { | |
376 | return PlatformFilename(NativeParent(ToNative())); | |
377 | } | |
378 | ||
379 | Result<PlatformFilename> PlatformFilename::FromString(const std::string& file_name) { | |
380 | RETURN_NOT_OK(ValidatePath(file_name)); | |
381 | ARROW_ASSIGN_OR_RAISE(auto ns, StringToNative(file_name)); | |
382 | return PlatformFilename(std::move(ns)); | |
383 | } | |
384 | ||
385 | PlatformFilename PlatformFilename::Join(const PlatformFilename& child) const { | |
386 | if (impl_->native_.empty() || impl_->native_.back() == kNativeSep) { | |
387 | return PlatformFilename(Impl{impl_->native_ + child.impl_->native_}); | |
388 | } else { | |
389 | return PlatformFilename(Impl{impl_->native_ + kNativeSep + child.impl_->native_}); | |
390 | } | |
391 | } | |
392 | ||
393 | Result<PlatformFilename> PlatformFilename::Join(const std::string& child_name) const { | |
394 | ARROW_ASSIGN_OR_RAISE(auto child, PlatformFilename::FromString(child_name)); | |
395 | return Join(child); | |
396 | } | |
397 | ||
398 | // | |
399 | // Filesystem access routines | |
400 | // | |
401 | ||
402 | namespace { | |
403 | ||
404 | Result<bool> DoCreateDir(const PlatformFilename& dir_path, bool create_parents) { | |
405 | #ifdef _WIN32 | |
406 | const auto s = dir_path.ToNative().c_str(); | |
407 | if (CreateDirectoryW(s, nullptr)) { | |
408 | return true; | |
409 | } | |
410 | int errnum = GetLastError(); | |
411 | if (errnum == ERROR_ALREADY_EXISTS) { | |
412 | const auto attrs = GetFileAttributesW(s); | |
413 | if (attrs == INVALID_FILE_ATTRIBUTES || !(attrs & FILE_ATTRIBUTE_DIRECTORY)) { | |
414 | // Note we propagate the original error, not the GetFileAttributesW() error | |
415 | return IOErrorFromWinError(ERROR_ALREADY_EXISTS, "Cannot create directory '", | |
416 | dir_path.ToString(), "': non-directory entry exists"); | |
417 | } | |
418 | return false; | |
419 | } | |
420 | if (create_parents && errnum == ERROR_PATH_NOT_FOUND) { | |
421 | auto parent_path = dir_path.Parent(); | |
422 | if (parent_path != dir_path) { | |
423 | RETURN_NOT_OK(DoCreateDir(parent_path, create_parents)); | |
424 | return DoCreateDir(dir_path, false); // Retry | |
425 | } | |
426 | } | |
427 | return IOErrorFromWinError(GetLastError(), "Cannot create directory '", | |
428 | dir_path.ToString(), "'"); | |
429 | #else | |
430 | const auto s = dir_path.ToNative().c_str(); | |
431 | if (mkdir(s, S_IRWXU | S_IRWXG | S_IRWXO) == 0) { | |
432 | return true; | |
433 | } | |
434 | if (errno == EEXIST) { | |
435 | struct stat st; | |
436 | if (stat(s, &st) || !S_ISDIR(st.st_mode)) { | |
437 | // Note we propagate the original errno, not the stat() errno | |
438 | return IOErrorFromErrno(EEXIST, "Cannot create directory '", dir_path.ToString(), | |
439 | "': non-directory entry exists"); | |
440 | } | |
441 | return false; | |
442 | } | |
443 | if (create_parents && errno == ENOENT) { | |
444 | auto parent_path = dir_path.Parent(); | |
445 | if (parent_path != dir_path) { | |
446 | RETURN_NOT_OK(DoCreateDir(parent_path, create_parents)); | |
447 | return DoCreateDir(dir_path, false); // Retry | |
448 | } | |
449 | } | |
450 | return IOErrorFromErrno(errno, "Cannot create directory '", dir_path.ToString(), "'"); | |
451 | #endif | |
452 | } | |
453 | ||
454 | } // namespace | |
455 | ||
456 | Result<bool> CreateDir(const PlatformFilename& dir_path) { | |
457 | return DoCreateDir(dir_path, false); | |
458 | } | |
459 | ||
460 | Result<bool> CreateDirTree(const PlatformFilename& dir_path) { | |
461 | return DoCreateDir(dir_path, true); | |
462 | } | |
463 | ||
464 | #ifdef _WIN32 | |
465 | ||
466 | namespace { | |
467 | ||
468 | void FindHandleDeleter(HANDLE* handle) { | |
469 | if (!FindClose(*handle)) { | |
470 | ARROW_LOG(WARNING) << "Cannot close directory handle: " | |
471 | << WinErrorMessage(GetLastError()); | |
472 | } | |
473 | } | |
474 | ||
475 | std::wstring PathWithoutTrailingSlash(const PlatformFilename& fn) { | |
476 | std::wstring path = fn.ToNative(); | |
477 | while (!path.empty() && path.back() == kNativeSep) { | |
478 | path.pop_back(); | |
479 | } | |
480 | return path; | |
481 | } | |
482 | ||
483 | Result<std::vector<WIN32_FIND_DATAW>> ListDirInternal(const PlatformFilename& dir_path) { | |
484 | WIN32_FIND_DATAW find_data; | |
485 | std::wstring pattern = PathWithoutTrailingSlash(dir_path) + L"\\*.*"; | |
486 | HANDLE handle = FindFirstFileW(pattern.c_str(), &find_data); | |
487 | if (handle == INVALID_HANDLE_VALUE) { | |
488 | return IOErrorFromWinError(GetLastError(), "Cannot list directory '", | |
489 | dir_path.ToString(), "'"); | |
490 | } | |
491 | ||
492 | std::unique_ptr<HANDLE, decltype(&FindHandleDeleter)> handle_guard(&handle, | |
493 | FindHandleDeleter); | |
494 | ||
495 | std::vector<WIN32_FIND_DATAW> results; | |
496 | do { | |
497 | // Skip "." and ".." | |
498 | if (find_data.cFileName[0] == L'.') { | |
499 | if (find_data.cFileName[1] == L'\0' || | |
500 | (find_data.cFileName[1] == L'.' && find_data.cFileName[2] == L'\0')) { | |
501 | continue; | |
502 | } | |
503 | } | |
504 | results.push_back(find_data); | |
505 | } while (FindNextFileW(handle, &find_data)); | |
506 | ||
507 | int errnum = GetLastError(); | |
508 | if (errnum != ERROR_NO_MORE_FILES) { | |
509 | return IOErrorFromWinError(GetLastError(), "Cannot list directory '", | |
510 | dir_path.ToString(), "'"); | |
511 | } | |
512 | return results; | |
513 | } | |
514 | ||
515 | Status FindOneFile(const PlatformFilename& fn, WIN32_FIND_DATAW* find_data, | |
516 | bool* exists = nullptr) { | |
517 | HANDLE handle = FindFirstFileW(PathWithoutTrailingSlash(fn).c_str(), find_data); | |
518 | if (handle == INVALID_HANDLE_VALUE) { | |
519 | int errnum = GetLastError(); | |
520 | if (exists == nullptr || | |
521 | (errnum != ERROR_PATH_NOT_FOUND && errnum != ERROR_FILE_NOT_FOUND)) { | |
522 | return IOErrorFromWinError(GetLastError(), "Cannot get information for path '", | |
523 | fn.ToString(), "'"); | |
524 | } | |
525 | *exists = false; | |
526 | } else { | |
527 | if (exists != nullptr) { | |
528 | *exists = true; | |
529 | } | |
530 | FindHandleDeleter(&handle); | |
531 | } | |
532 | return Status::OK(); | |
533 | } | |
534 | ||
535 | } // namespace | |
536 | ||
537 | Result<std::vector<PlatformFilename>> ListDir(const PlatformFilename& dir_path) { | |
538 | ARROW_ASSIGN_OR_RAISE(auto entries, ListDirInternal(dir_path)); | |
539 | ||
540 | std::vector<PlatformFilename> results; | |
541 | results.reserve(entries.size()); | |
542 | for (const auto& entry : entries) { | |
543 | results.emplace_back(std::wstring(entry.cFileName)); | |
544 | } | |
545 | return results; | |
546 | } | |
547 | ||
548 | #else | |
549 | ||
550 | Result<std::vector<PlatformFilename>> ListDir(const PlatformFilename& dir_path) { | |
551 | DIR* dir = opendir(dir_path.ToNative().c_str()); | |
552 | if (dir == nullptr) { | |
553 | return IOErrorFromErrno(errno, "Cannot list directory '", dir_path.ToString(), "'"); | |
554 | } | |
555 | ||
556 | auto dir_deleter = [](DIR* dir) -> void { | |
557 | if (closedir(dir) != 0) { | |
558 | ARROW_LOG(WARNING) << "Cannot close directory handle: " << ErrnoMessage(errno); | |
559 | } | |
560 | }; | |
561 | std::unique_ptr<DIR, decltype(dir_deleter)> dir_guard(dir, dir_deleter); | |
562 | ||
563 | std::vector<PlatformFilename> results; | |
564 | errno = 0; | |
565 | struct dirent* entry = readdir(dir); | |
566 | while (entry != nullptr) { | |
567 | std::string path = entry->d_name; | |
568 | if (path != "." && path != "..") { | |
569 | results.emplace_back(std::move(path)); | |
570 | } | |
571 | entry = readdir(dir); | |
572 | } | |
573 | if (errno != 0) { | |
574 | return IOErrorFromErrno(errno, "Cannot list directory '", dir_path.ToString(), "'"); | |
575 | } | |
576 | return results; | |
577 | } | |
578 | ||
579 | #endif | |
580 | ||
581 | namespace { | |
582 | ||
583 | #ifdef _WIN32 | |
584 | ||
585 | Status DeleteDirTreeInternal(const PlatformFilename& dir_path); | |
586 | ||
587 | // Remove a directory entry that's always a directory | |
588 | Status DeleteDirEntryDir(const PlatformFilename& path, const WIN32_FIND_DATAW& entry, | |
589 | bool remove_top_dir = true) { | |
590 | if ((entry.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) == 0) { | |
591 | // It's a directory that doesn't have a reparse point => recurse | |
592 | RETURN_NOT_OK(DeleteDirTreeInternal(path)); | |
593 | } | |
594 | if (remove_top_dir) { | |
595 | // Remove now empty directory or reparse point (e.g. symlink to dir) | |
596 | if (!RemoveDirectoryW(path.ToNative().c_str())) { | |
597 | return IOErrorFromWinError(GetLastError(), "Cannot delete directory entry '", | |
598 | path.ToString(), "': "); | |
599 | } | |
600 | } | |
601 | return Status::OK(); | |
602 | } | |
603 | ||
604 | Status DeleteDirEntry(const PlatformFilename& path, const WIN32_FIND_DATAW& entry) { | |
605 | if ((entry.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0) { | |
606 | return DeleteDirEntryDir(path, entry); | |
607 | } | |
608 | // It's a non-directory entry, most likely a regular file | |
609 | if (!DeleteFileW(path.ToNative().c_str())) { | |
610 | return IOErrorFromWinError(GetLastError(), "Cannot delete file '", path.ToString(), | |
611 | "': "); | |
612 | } | |
613 | return Status::OK(); | |
614 | } | |
615 | ||
616 | Status DeleteDirTreeInternal(const PlatformFilename& dir_path) { | |
617 | ARROW_ASSIGN_OR_RAISE(auto entries, ListDirInternal(dir_path)); | |
618 | for (const auto& entry : entries) { | |
619 | PlatformFilename path = dir_path.Join(PlatformFilename(entry.cFileName)); | |
620 | RETURN_NOT_OK(DeleteDirEntry(path, entry)); | |
621 | } | |
622 | return Status::OK(); | |
623 | } | |
624 | ||
625 | Result<bool> DeleteDirContents(const PlatformFilename& dir_path, bool allow_not_found, | |
626 | bool remove_top_dir) { | |
627 | bool exists = true; | |
628 | WIN32_FIND_DATAW entry; | |
629 | if (allow_not_found) { | |
630 | RETURN_NOT_OK(FindOneFile(dir_path, &entry, &exists)); | |
631 | } else { | |
632 | // Will raise if dir_path does not exist | |
633 | RETURN_NOT_OK(FindOneFile(dir_path, &entry)); | |
634 | } | |
635 | if (exists) { | |
636 | RETURN_NOT_OK(DeleteDirEntryDir(dir_path, entry, remove_top_dir)); | |
637 | } | |
638 | return exists; | |
639 | } | |
640 | ||
641 | #else // POSIX | |
642 | ||
643 | Status LinkStat(const PlatformFilename& path, struct stat* lst, bool* exists = nullptr) { | |
644 | if (lstat(path.ToNative().c_str(), lst) != 0) { | |
645 | if (exists == nullptr || (errno != ENOENT && errno != ENOTDIR && errno != ELOOP)) { | |
646 | return IOErrorFromErrno(errno, "Cannot get information for path '", path.ToString(), | |
647 | "'"); | |
648 | } | |
649 | *exists = false; | |
650 | } else if (exists != nullptr) { | |
651 | *exists = true; | |
652 | } | |
653 | return Status::OK(); | |
654 | } | |
655 | ||
656 | Status DeleteDirTreeInternal(const PlatformFilename& dir_path); | |
657 | ||
658 | Status DeleteDirEntryDir(const PlatformFilename& path, const struct stat& lst, | |
659 | bool remove_top_dir = true) { | |
660 | if (!S_ISLNK(lst.st_mode)) { | |
661 | // Not a symlink => delete contents recursively | |
662 | DCHECK(S_ISDIR(lst.st_mode)); | |
663 | RETURN_NOT_OK(DeleteDirTreeInternal(path)); | |
664 | if (remove_top_dir && rmdir(path.ToNative().c_str()) != 0) { | |
665 | return IOErrorFromErrno(errno, "Cannot delete directory entry '", path.ToString(), | |
666 | "'"); | |
667 | } | |
668 | } else { | |
669 | // Remove symlink | |
670 | if (remove_top_dir && unlink(path.ToNative().c_str()) != 0) { | |
671 | return IOErrorFromErrno(errno, "Cannot delete directory entry '", path.ToString(), | |
672 | "'"); | |
673 | } | |
674 | } | |
675 | return Status::OK(); | |
676 | } | |
677 | ||
678 | Status DeleteDirEntry(const PlatformFilename& path, const struct stat& lst) { | |
679 | if (S_ISDIR(lst.st_mode)) { | |
680 | return DeleteDirEntryDir(path, lst); | |
681 | } | |
682 | if (unlink(path.ToNative().c_str()) != 0) { | |
683 | return IOErrorFromErrno(errno, "Cannot delete directory entry '", path.ToString(), | |
684 | "'"); | |
685 | } | |
686 | return Status::OK(); | |
687 | } | |
688 | ||
689 | Status DeleteDirTreeInternal(const PlatformFilename& dir_path) { | |
690 | ARROW_ASSIGN_OR_RAISE(auto children, ListDir(dir_path)); | |
691 | for (const auto& child : children) { | |
692 | struct stat lst; | |
693 | PlatformFilename full_path = dir_path.Join(child); | |
694 | RETURN_NOT_OK(LinkStat(full_path, &lst)); | |
695 | RETURN_NOT_OK(DeleteDirEntry(full_path, lst)); | |
696 | } | |
697 | return Status::OK(); | |
698 | } | |
699 | ||
700 | Result<bool> DeleteDirContents(const PlatformFilename& dir_path, bool allow_not_found, | |
701 | bool remove_top_dir) { | |
702 | bool exists = true; | |
703 | struct stat lst; | |
704 | if (allow_not_found) { | |
705 | RETURN_NOT_OK(LinkStat(dir_path, &lst, &exists)); | |
706 | } else { | |
707 | // Will raise if dir_path does not exist | |
708 | RETURN_NOT_OK(LinkStat(dir_path, &lst)); | |
709 | } | |
710 | if (exists) { | |
711 | if (!S_ISDIR(lst.st_mode) && !S_ISLNK(lst.st_mode)) { | |
712 | return Status::IOError("Cannot delete directory '", dir_path.ToString(), | |
713 | "': not a directory"); | |
714 | } | |
715 | RETURN_NOT_OK(DeleteDirEntryDir(dir_path, lst, remove_top_dir)); | |
716 | } | |
717 | return exists; | |
718 | } | |
719 | ||
720 | #endif | |
721 | ||
722 | } // namespace | |
723 | ||
724 | Result<bool> DeleteDirContents(const PlatformFilename& dir_path, bool allow_not_found) { | |
725 | return DeleteDirContents(dir_path, allow_not_found, /*remove_top_dir=*/false); | |
726 | } | |
727 | ||
728 | Result<bool> DeleteDirTree(const PlatformFilename& dir_path, bool allow_not_found) { | |
729 | return DeleteDirContents(dir_path, allow_not_found, /*remove_top_dir=*/true); | |
730 | } | |
731 | ||
732 | Result<bool> DeleteFile(const PlatformFilename& file_path, bool allow_not_found) { | |
733 | #ifdef _WIN32 | |
734 | if (DeleteFileW(file_path.ToNative().c_str())) { | |
735 | return true; | |
736 | } else { | |
737 | int errnum = GetLastError(); | |
738 | if (!allow_not_found || errnum != ERROR_FILE_NOT_FOUND) { | |
739 | return IOErrorFromWinError(GetLastError(), "Cannot delete file '", | |
740 | file_path.ToString(), "'"); | |
741 | } | |
742 | } | |
743 | #else | |
744 | if (unlink(file_path.ToNative().c_str()) == 0) { | |
745 | return true; | |
746 | } else { | |
747 | if (!allow_not_found || errno != ENOENT) { | |
748 | return IOErrorFromErrno(errno, "Cannot delete file '", file_path.ToString(), "'"); | |
749 | } | |
750 | } | |
751 | #endif | |
752 | return false; | |
753 | } | |
754 | ||
755 | Result<bool> FileExists(const PlatformFilename& path) { | |
756 | #ifdef _WIN32 | |
757 | if (GetFileAttributesW(path.ToNative().c_str()) != INVALID_FILE_ATTRIBUTES) { | |
758 | return true; | |
759 | } else { | |
760 | int errnum = GetLastError(); | |
761 | if (errnum != ERROR_PATH_NOT_FOUND && errnum != ERROR_FILE_NOT_FOUND) { | |
762 | return IOErrorFromWinError(GetLastError(), "Failed getting information for path '", | |
763 | path.ToString(), "'"); | |
764 | } | |
765 | return false; | |
766 | } | |
767 | #else | |
768 | struct stat st; | |
769 | if (stat(path.ToNative().c_str(), &st) == 0) { | |
770 | return true; | |
771 | } else { | |
772 | if (errno != ENOENT && errno != ENOTDIR) { | |
773 | return IOErrorFromErrno(errno, "Failed getting information for path '", | |
774 | path.ToString(), "'"); | |
775 | } | |
776 | return false; | |
777 | } | |
778 | #endif | |
779 | } | |
780 | ||
781 | // | |
782 | // Functions for creating file descriptors | |
783 | // | |
784 | ||
785 | #define CHECK_LSEEK(retval) \ | |
786 | if ((retval) == -1) return Status::IOError("lseek failed"); | |
787 | ||
788 | static inline int64_t lseek64_compat(int fd, int64_t pos, int whence) { | |
789 | #if defined(_WIN32) | |
790 | return _lseeki64(fd, pos, whence); | |
791 | #else | |
792 | return lseek(fd, pos, whence); | |
793 | #endif | |
794 | } | |
795 | ||
796 | static inline Result<int> CheckFileOpResult(int fd_ret, int errno_actual, | |
797 | const PlatformFilename& file_name, | |
798 | const char* opname) { | |
799 | if (fd_ret == -1) { | |
800 | #ifdef _WIN32 | |
801 | int winerr = GetLastError(); | |
802 | if (winerr != ERROR_SUCCESS) { | |
803 | return IOErrorFromWinError(GetLastError(), "Failed to ", opname, " file '", | |
804 | file_name.ToString(), "'"); | |
805 | } | |
806 | #endif | |
807 | return IOErrorFromErrno(errno_actual, "Failed to ", opname, " file '", | |
808 | file_name.ToString(), "'"); | |
809 | } | |
810 | return fd_ret; | |
811 | } | |
812 | ||
813 | Result<int> FileOpenReadable(const PlatformFilename& file_name) { | |
814 | int fd, errno_actual; | |
815 | #if defined(_WIN32) | |
816 | SetLastError(0); | |
817 | HANDLE file_handle = CreateFileW(file_name.ToNative().c_str(), GENERIC_READ, | |
818 | FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, | |
819 | OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); | |
820 | ||
821 | DWORD last_error = GetLastError(); | |
822 | if (last_error == ERROR_SUCCESS) { | |
823 | errno_actual = 0; | |
824 | fd = _open_osfhandle(reinterpret_cast<intptr_t>(file_handle), | |
825 | _O_RDONLY | _O_BINARY | _O_NOINHERIT); | |
826 | } else { | |
827 | return IOErrorFromWinError(last_error, "Failed to open local file '", | |
828 | file_name.ToString(), "'"); | |
829 | } | |
830 | #else | |
831 | fd = open(file_name.ToNative().c_str(), O_RDONLY); | |
832 | errno_actual = errno; | |
833 | ||
834 | if (fd >= 0) { | |
835 | // open(O_RDONLY) succeeds on directories, check for it | |
836 | struct stat st; | |
837 | int ret = fstat(fd, &st); | |
838 | if (ret == -1) { | |
839 | ARROW_UNUSED(FileClose(fd)); | |
840 | // Will propagate error below | |
841 | } else if (S_ISDIR(st.st_mode)) { | |
842 | ARROW_UNUSED(FileClose(fd)); | |
843 | return Status::IOError("Cannot open for reading: path '", file_name.ToString(), | |
844 | "' is a directory"); | |
845 | } | |
846 | } | |
847 | #endif | |
848 | ||
849 | return CheckFileOpResult(fd, errno_actual, file_name, "open local"); | |
850 | } | |
851 | ||
852 | Result<int> FileOpenWritable(const PlatformFilename& file_name, bool write_only, | |
853 | bool truncate, bool append) { | |
854 | int fd, errno_actual; | |
855 | ||
856 | #if defined(_WIN32) | |
857 | SetLastError(0); | |
858 | int oflag = _O_CREAT | _O_BINARY | _O_NOINHERIT; | |
859 | DWORD desired_access = GENERIC_WRITE; | |
860 | DWORD share_mode = FILE_SHARE_READ | FILE_SHARE_WRITE; | |
861 | DWORD creation_disposition = OPEN_ALWAYS; | |
862 | ||
863 | if (append) { | |
864 | oflag |= _O_APPEND; | |
865 | } | |
866 | ||
867 | if (truncate) { | |
868 | oflag |= _O_TRUNC; | |
869 | creation_disposition = CREATE_ALWAYS; | |
870 | } | |
871 | ||
872 | if (write_only) { | |
873 | oflag |= _O_WRONLY; | |
874 | } else { | |
875 | oflag |= _O_RDWR; | |
876 | desired_access |= GENERIC_READ; | |
877 | } | |
878 | ||
879 | HANDLE file_handle = | |
880 | CreateFileW(file_name.ToNative().c_str(), desired_access, share_mode, NULL, | |
881 | creation_disposition, FILE_ATTRIBUTE_NORMAL, NULL); | |
882 | ||
883 | DWORD last_error = GetLastError(); | |
884 | if (last_error == ERROR_SUCCESS || last_error == ERROR_ALREADY_EXISTS) { | |
885 | errno_actual = 0; | |
886 | fd = _open_osfhandle(reinterpret_cast<intptr_t>(file_handle), oflag); | |
887 | } else { | |
888 | return IOErrorFromWinError(last_error, "Failed to open local file '", | |
889 | file_name.ToString(), "'"); | |
890 | } | |
891 | #else | |
892 | int oflag = O_CREAT; | |
893 | ||
894 | if (truncate) { | |
895 | oflag |= O_TRUNC; | |
896 | } | |
897 | if (append) { | |
898 | oflag |= O_APPEND; | |
899 | } | |
900 | ||
901 | if (write_only) { | |
902 | oflag |= O_WRONLY; | |
903 | } else { | |
904 | oflag |= O_RDWR; | |
905 | } | |
906 | ||
907 | fd = open(file_name.ToNative().c_str(), oflag, 0666); | |
908 | errno_actual = errno; | |
909 | #endif | |
910 | ||
911 | RETURN_NOT_OK(CheckFileOpResult(fd, errno_actual, file_name, "open local")); | |
912 | if (append) { | |
913 | // Seek to end, as O_APPEND does not necessarily do it | |
914 | auto ret = lseek64_compat(fd, 0, SEEK_END); | |
915 | if (ret == -1) { | |
916 | ARROW_UNUSED(FileClose(fd)); | |
917 | return Status::IOError("lseek failed"); | |
918 | } | |
919 | } | |
920 | return fd; | |
921 | } | |
922 | ||
923 | Result<int64_t> FileTell(int fd) { | |
924 | int64_t current_pos; | |
925 | #if defined(_WIN32) | |
926 | current_pos = _telli64(fd); | |
927 | if (current_pos == -1) { | |
928 | return Status::IOError("_telli64 failed"); | |
929 | } | |
930 | #else | |
931 | current_pos = lseek64_compat(fd, 0, SEEK_CUR); | |
932 | CHECK_LSEEK(current_pos); | |
933 | #endif | |
934 | return current_pos; | |
935 | } | |
936 | ||
937 | Result<Pipe> CreatePipe() { | |
938 | int ret; | |
939 | int fd[2]; | |
940 | #if defined(_WIN32) | |
941 | ret = _pipe(fd, 4096, _O_BINARY); | |
942 | #else | |
943 | ret = pipe(fd); | |
944 | #endif | |
945 | ||
946 | if (ret == -1) { | |
947 | return IOErrorFromErrno(errno, "Error creating pipe"); | |
948 | } | |
949 | return Pipe{fd[0], fd[1]}; | |
950 | } | |
951 | ||
952 | static Status StatusFromMmapErrno(const char* prefix) { | |
953 | #ifdef _WIN32 | |
954 | errno = __map_mman_error(GetLastError(), EPERM); | |
955 | #endif | |
956 | return IOErrorFromErrno(errno, prefix); | |
957 | } | |
958 | ||
959 | namespace { | |
960 | ||
961 | int64_t GetPageSizeInternal() { | |
962 | #if defined(__APPLE__) | |
963 | return getpagesize(); | |
964 | #elif defined(_WIN32) | |
965 | SYSTEM_INFO si; | |
966 | GetSystemInfo(&si); | |
967 | return si.dwPageSize; | |
968 | #else | |
969 | errno = 0; | |
970 | const auto ret = sysconf(_SC_PAGESIZE); | |
971 | if (ret == -1) { | |
972 | ARROW_LOG(FATAL) << "sysconf(_SC_PAGESIZE) failed: " << ErrnoMessage(errno); | |
973 | } | |
974 | return static_cast<int64_t>(ret); | |
975 | #endif | |
976 | } | |
977 | ||
978 | } // namespace | |
979 | ||
980 | int64_t GetPageSize() { | |
981 | static const int64_t kPageSize = GetPageSizeInternal(); // cache it | |
982 | return kPageSize; | |
983 | } | |
984 | ||
985 | // | |
986 | // Compatible way to remap a memory map | |
987 | // | |
988 | ||
989 | Status MemoryMapRemap(void* addr, size_t old_size, size_t new_size, int fildes, | |
990 | void** new_addr) { | |
991 | // should only be called with writable files | |
992 | *new_addr = MAP_FAILED; | |
993 | #ifdef _WIN32 | |
994 | // flags are ignored on windows | |
995 | HANDLE fm, h; | |
996 | ||
997 | if (!UnmapViewOfFile(addr)) { | |
998 | return StatusFromMmapErrno("UnmapViewOfFile failed"); | |
999 | } | |
1000 | ||
1001 | h = reinterpret_cast<HANDLE>(_get_osfhandle(fildes)); | |
1002 | if (h == INVALID_HANDLE_VALUE) { | |
1003 | return StatusFromMmapErrno("Cannot get file handle"); | |
1004 | } | |
1005 | ||
1006 | uint64_t new_size64 = new_size; | |
1007 | LONG new_size_low = static_cast<LONG>(new_size64 & 0xFFFFFFFFUL); | |
1008 | LONG new_size_high = static_cast<LONG>((new_size64 >> 32) & 0xFFFFFFFFUL); | |
1009 | ||
1010 | SetFilePointer(h, new_size_low, &new_size_high, FILE_BEGIN); | |
1011 | SetEndOfFile(h); | |
1012 | fm = CreateFileMapping(h, NULL, PAGE_READWRITE, 0, 0, ""); | |
1013 | if (fm == NULL) { | |
1014 | return StatusFromMmapErrno("CreateFileMapping failed"); | |
1015 | } | |
1016 | *new_addr = MapViewOfFile(fm, FILE_MAP_WRITE, 0, 0, new_size); | |
1017 | CloseHandle(fm); | |
1018 | if (new_addr == NULL) { | |
1019 | return StatusFromMmapErrno("MapViewOfFile failed"); | |
1020 | } | |
1021 | return Status::OK(); | |
1022 | #elif defined(__linux__) | |
1023 | if (ftruncate(fildes, new_size) == -1) { | |
1024 | return StatusFromMmapErrno("ftruncate failed"); | |
1025 | } | |
1026 | *new_addr = mremap(addr, old_size, new_size, MREMAP_MAYMOVE); | |
1027 | if (*new_addr == MAP_FAILED) { | |
1028 | return StatusFromMmapErrno("mremap failed"); | |
1029 | } | |
1030 | return Status::OK(); | |
1031 | #else | |
1032 | // we have to close the mmap first, truncate the file to the new size | |
1033 | // and recreate the mmap | |
1034 | if (munmap(addr, old_size) == -1) { | |
1035 | return StatusFromMmapErrno("munmap failed"); | |
1036 | } | |
1037 | if (ftruncate(fildes, new_size) == -1) { | |
1038 | return StatusFromMmapErrno("ftruncate failed"); | |
1039 | } | |
1040 | // we set READ / WRITE flags on the new map, since we could only have | |
1041 | // unlarged a RW map in the first place | |
1042 | *new_addr = mmap(NULL, new_size, PROT_READ | PROT_WRITE, MAP_SHARED, fildes, 0); | |
1043 | if (*new_addr == MAP_FAILED) { | |
1044 | return StatusFromMmapErrno("mmap failed"); | |
1045 | } | |
1046 | return Status::OK(); | |
1047 | #endif | |
1048 | } | |
1049 | ||
1050 | Status MemoryAdviseWillNeed(const std::vector<MemoryRegion>& regions) { | |
1051 | const auto page_size = static_cast<size_t>(GetPageSize()); | |
1052 | DCHECK_GT(page_size, 0); | |
1053 | const size_t page_mask = ~(page_size - 1); | |
1054 | DCHECK_EQ(page_mask & page_size, page_size); | |
1055 | ||
1056 | auto align_region = [=](const MemoryRegion& region) -> MemoryRegion { | |
1057 | const auto addr = reinterpret_cast<uintptr_t>(region.addr); | |
1058 | const auto aligned_addr = addr & page_mask; | |
1059 | DCHECK_LT(addr - aligned_addr, page_size); | |
1060 | return {reinterpret_cast<void*>(aligned_addr), | |
1061 | region.size + static_cast<size_t>(addr - aligned_addr)}; | |
1062 | }; | |
1063 | ||
1064 | #ifdef _WIN32 | |
1065 | // PrefetchVirtualMemory() is available on Windows 8 or later | |
1066 | struct PrefetchEntry { // Like WIN32_MEMORY_RANGE_ENTRY | |
1067 | void* VirtualAddress; | |
1068 | size_t NumberOfBytes; | |
1069 | ||
1070 | PrefetchEntry(const MemoryRegion& region) // NOLINT runtime/explicit | |
1071 | : VirtualAddress(region.addr), NumberOfBytes(region.size) {} | |
1072 | }; | |
1073 | using PrefetchVirtualMemoryFunc = BOOL (*)(HANDLE, ULONG_PTR, PrefetchEntry*, ULONG); | |
1074 | static const auto prefetch_virtual_memory = reinterpret_cast<PrefetchVirtualMemoryFunc>( | |
1075 | GetProcAddress(GetModuleHandleW(L"kernel32.dll"), "PrefetchVirtualMemory")); | |
1076 | if (prefetch_virtual_memory != nullptr) { | |
1077 | std::vector<PrefetchEntry> entries; | |
1078 | entries.reserve(regions.size()); | |
1079 | for (const auto& region : regions) { | |
1080 | if (region.size != 0) { | |
1081 | entries.emplace_back(align_region(region)); | |
1082 | } | |
1083 | } | |
1084 | if (!entries.empty() && | |
1085 | !prefetch_virtual_memory(GetCurrentProcess(), | |
1086 | static_cast<ULONG_PTR>(entries.size()), entries.data(), | |
1087 | 0)) { | |
1088 | return IOErrorFromWinError(GetLastError(), "PrefetchVirtualMemory failed"); | |
1089 | } | |
1090 | } | |
1091 | return Status::OK(); | |
1092 | #elif defined(POSIX_MADV_WILLNEED) | |
1093 | for (const auto& region : regions) { | |
1094 | if (region.size != 0) { | |
1095 | const auto aligned = align_region(region); | |
1096 | int err = posix_madvise(aligned.addr, aligned.size, POSIX_MADV_WILLNEED); | |
1097 | // EBADF can be returned on Linux in the following cases: | |
1098 | // - the kernel version is older than 3.9 | |
1099 | // - the kernel was compiled with CONFIG_SWAP disabled (ARROW-9577) | |
1100 | if (err != 0 && err != EBADF) { | |
1101 | return IOErrorFromErrno(err, "posix_madvise failed"); | |
1102 | } | |
1103 | } | |
1104 | } | |
1105 | return Status::OK(); | |
1106 | #else | |
1107 | return Status::OK(); | |
1108 | #endif | |
1109 | } | |
1110 | ||
1111 | // | |
1112 | // Closing files | |
1113 | // | |
1114 | ||
1115 | Status FileClose(int fd) { | |
1116 | int ret; | |
1117 | ||
1118 | #if defined(_WIN32) | |
1119 | ret = static_cast<int>(_close(fd)); | |
1120 | #else | |
1121 | ret = static_cast<int>(close(fd)); | |
1122 | #endif | |
1123 | ||
1124 | if (ret == -1) { | |
1125 | return Status::IOError("error closing file"); | |
1126 | } | |
1127 | return Status::OK(); | |
1128 | } | |
1129 | ||
1130 | // | |
1131 | // Seeking and telling | |
1132 | // | |
1133 | ||
1134 | Status FileSeek(int fd, int64_t pos, int whence) { | |
1135 | int64_t ret = lseek64_compat(fd, pos, whence); | |
1136 | CHECK_LSEEK(ret); | |
1137 | return Status::OK(); | |
1138 | } | |
1139 | ||
1140 | Status FileSeek(int fd, int64_t pos) { return FileSeek(fd, pos, SEEK_SET); } | |
1141 | ||
1142 | Result<int64_t> FileGetSize(int fd) { | |
1143 | #if defined(_WIN32) | |
1144 | struct __stat64 st; | |
1145 | #else | |
1146 | struct stat st; | |
1147 | #endif | |
1148 | st.st_size = -1; | |
1149 | ||
1150 | #if defined(_WIN32) | |
1151 | int ret = _fstat64(fd, &st); | |
1152 | #else | |
1153 | int ret = fstat(fd, &st); | |
1154 | #endif | |
1155 | ||
1156 | if (ret == -1) { | |
1157 | return Status::IOError("error stat()ing file"); | |
1158 | } | |
1159 | if (st.st_size == 0) { | |
1160 | // Maybe the file doesn't support getting its size, double-check by | |
1161 | // trying to tell() (seekable files usually have a size, while | |
1162 | // non-seekable files don't) | |
1163 | RETURN_NOT_OK(FileTell(fd)); | |
1164 | } else if (st.st_size < 0) { | |
1165 | return Status::IOError("error getting file size"); | |
1166 | } | |
1167 | return st.st_size; | |
1168 | } | |
1169 | ||
1170 | // | |
1171 | // Reading data | |
1172 | // | |
1173 | ||
1174 | static inline int64_t pread_compat(int fd, void* buf, int64_t nbytes, int64_t pos) { | |
1175 | #if defined(_WIN32) | |
1176 | HANDLE handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd)); | |
1177 | DWORD dwBytesRead = 0; | |
1178 | OVERLAPPED overlapped = {0}; | |
1179 | overlapped.Offset = static_cast<uint32_t>(pos); | |
1180 | overlapped.OffsetHigh = static_cast<uint32_t>(pos >> 32); | |
1181 | ||
1182 | // Note: ReadFile() will update the file position | |
1183 | BOOL bRet = | |
1184 | ReadFile(handle, buf, static_cast<uint32_t>(nbytes), &dwBytesRead, &overlapped); | |
1185 | if (bRet || GetLastError() == ERROR_HANDLE_EOF) { | |
1186 | return dwBytesRead; | |
1187 | } else { | |
1188 | return -1; | |
1189 | } | |
1190 | #else | |
1191 | return static_cast<int64_t>( | |
1192 | pread(fd, buf, static_cast<size_t>(nbytes), static_cast<off_t>(pos))); | |
1193 | #endif | |
1194 | } | |
1195 | ||
1196 | Result<int64_t> FileRead(int fd, uint8_t* buffer, int64_t nbytes) { | |
1197 | int64_t bytes_read = 0; | |
1198 | ||
1199 | while (bytes_read < nbytes) { | |
1200 | int64_t chunksize = | |
1201 | std::min(static_cast<int64_t>(ARROW_MAX_IO_CHUNKSIZE), nbytes - bytes_read); | |
1202 | #if defined(_WIN32) | |
1203 | int64_t ret = | |
1204 | static_cast<int64_t>(_read(fd, buffer, static_cast<uint32_t>(chunksize))); | |
1205 | #else | |
1206 | int64_t ret = static_cast<int64_t>(read(fd, buffer, static_cast<size_t>(chunksize))); | |
1207 | #endif | |
1208 | ||
1209 | if (ret == -1) { | |
1210 | return IOErrorFromErrno(errno, "Error reading bytes from file"); | |
1211 | } | |
1212 | if (ret == 0) { | |
1213 | // EOF | |
1214 | break; | |
1215 | } | |
1216 | buffer += ret; | |
1217 | bytes_read += ret; | |
1218 | } | |
1219 | return bytes_read; | |
1220 | } | |
1221 | ||
1222 | Result<int64_t> FileReadAt(int fd, uint8_t* buffer, int64_t position, int64_t nbytes) { | |
1223 | int64_t bytes_read = 0; | |
1224 | ||
1225 | while (bytes_read < nbytes) { | |
1226 | int64_t chunksize = | |
1227 | std::min(static_cast<int64_t>(ARROW_MAX_IO_CHUNKSIZE), nbytes - bytes_read); | |
1228 | int64_t ret = pread_compat(fd, buffer, chunksize, position); | |
1229 | ||
1230 | if (ret == -1) { | |
1231 | return IOErrorFromErrno(errno, "Error reading bytes from file"); | |
1232 | } | |
1233 | if (ret == 0) { | |
1234 | // EOF | |
1235 | break; | |
1236 | } | |
1237 | buffer += ret; | |
1238 | position += ret; | |
1239 | bytes_read += ret; | |
1240 | } | |
1241 | return bytes_read; | |
1242 | } | |
1243 | ||
1244 | // | |
1245 | // Writing data | |
1246 | // | |
1247 | ||
1248 | Status FileWrite(int fd, const uint8_t* buffer, const int64_t nbytes) { | |
1249 | int ret = 0; | |
1250 | int64_t bytes_written = 0; | |
1251 | ||
1252 | while (ret != -1 && bytes_written < nbytes) { | |
1253 | int64_t chunksize = | |
1254 | std::min(static_cast<int64_t>(ARROW_MAX_IO_CHUNKSIZE), nbytes - bytes_written); | |
1255 | #if defined(_WIN32) | |
1256 | ret = static_cast<int>( | |
1257 | _write(fd, buffer + bytes_written, static_cast<uint32_t>(chunksize))); | |
1258 | #else | |
1259 | ret = static_cast<int>( | |
1260 | write(fd, buffer + bytes_written, static_cast<size_t>(chunksize))); | |
1261 | #endif | |
1262 | ||
1263 | if (ret != -1) { | |
1264 | bytes_written += ret; | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | if (ret == -1) { | |
1269 | return IOErrorFromErrno(errno, "Error writing bytes to file"); | |
1270 | } | |
1271 | return Status::OK(); | |
1272 | } | |
1273 | ||
1274 | Status FileTruncate(int fd, const int64_t size) { | |
1275 | int ret, errno_actual; | |
1276 | ||
1277 | #ifdef _WIN32 | |
1278 | errno_actual = _chsize_s(fd, static_cast<size_t>(size)); | |
1279 | ret = errno_actual == 0 ? 0 : -1; | |
1280 | #else | |
1281 | ret = ftruncate(fd, static_cast<size_t>(size)); | |
1282 | errno_actual = errno; | |
1283 | #endif | |
1284 | ||
1285 | if (ret == -1) { | |
1286 | return IOErrorFromErrno(errno_actual, "Error writing bytes to file"); | |
1287 | } | |
1288 | return Status::OK(); | |
1289 | } | |
1290 | ||
1291 | // | |
1292 | // Environment variables | |
1293 | // | |
1294 | ||
1295 | Result<std::string> GetEnvVar(const char* name) { | |
1296 | #ifdef _WIN32 | |
1297 | // On Windows, getenv() reads an early copy of the process' environment | |
1298 | // which doesn't get updated when SetEnvironmentVariable() is called. | |
1299 | constexpr int32_t bufsize = 2000; | |
1300 | char c_str[bufsize]; | |
1301 | auto res = GetEnvironmentVariableA(name, c_str, bufsize); | |
1302 | if (res >= bufsize) { | |
1303 | return Status::CapacityError("environment variable value too long"); | |
1304 | } else if (res == 0) { | |
1305 | return Status::KeyError("environment variable undefined"); | |
1306 | } | |
1307 | return std::string(c_str); | |
1308 | #else | |
1309 | char* c_str = getenv(name); | |
1310 | if (c_str == nullptr) { | |
1311 | return Status::KeyError("environment variable undefined"); | |
1312 | } | |
1313 | return std::string(c_str); | |
1314 | #endif | |
1315 | } | |
1316 | ||
1317 | Result<std::string> GetEnvVar(const std::string& name) { return GetEnvVar(name.c_str()); } | |
1318 | ||
1319 | #ifdef _WIN32 | |
1320 | Result<NativePathString> GetEnvVarNative(const std::string& name) { | |
1321 | NativePathString w_name; | |
1322 | constexpr int32_t bufsize = 2000; | |
1323 | wchar_t w_str[bufsize]; | |
1324 | ||
1325 | ARROW_ASSIGN_OR_RAISE(w_name, StringToNative(name)); | |
1326 | auto res = GetEnvironmentVariableW(w_name.c_str(), w_str, bufsize); | |
1327 | if (res >= bufsize) { | |
1328 | return Status::CapacityError("environment variable value too long"); | |
1329 | } else if (res == 0) { | |
1330 | return Status::KeyError("environment variable undefined"); | |
1331 | } | |
1332 | return NativePathString(w_str); | |
1333 | } | |
1334 | ||
1335 | Result<NativePathString> GetEnvVarNative(const char* name) { | |
1336 | return GetEnvVarNative(std::string(name)); | |
1337 | } | |
1338 | ||
1339 | #else | |
1340 | ||
1341 | Result<NativePathString> GetEnvVarNative(const std::string& name) { | |
1342 | return GetEnvVar(name); | |
1343 | } | |
1344 | ||
1345 | Result<NativePathString> GetEnvVarNative(const char* name) { return GetEnvVar(name); } | |
1346 | #endif | |
1347 | ||
1348 | Status SetEnvVar(const char* name, const char* value) { | |
1349 | #ifdef _WIN32 | |
1350 | if (SetEnvironmentVariableA(name, value)) { | |
1351 | return Status::OK(); | |
1352 | } else { | |
1353 | return Status::Invalid("failed setting environment variable"); | |
1354 | } | |
1355 | #else | |
1356 | if (setenv(name, value, 1) == 0) { | |
1357 | return Status::OK(); | |
1358 | } else { | |
1359 | return Status::Invalid("failed setting environment variable"); | |
1360 | } | |
1361 | #endif | |
1362 | } | |
1363 | ||
1364 | Status SetEnvVar(const std::string& name, const std::string& value) { | |
1365 | return SetEnvVar(name.c_str(), value.c_str()); | |
1366 | } | |
1367 | ||
1368 | Status DelEnvVar(const char* name) { | |
1369 | #ifdef _WIN32 | |
1370 | if (SetEnvironmentVariableA(name, nullptr)) { | |
1371 | return Status::OK(); | |
1372 | } else { | |
1373 | return Status::Invalid("failed deleting environment variable"); | |
1374 | } | |
1375 | #else | |
1376 | if (unsetenv(name) == 0) { | |
1377 | return Status::OK(); | |
1378 | } else { | |
1379 | return Status::Invalid("failed deleting environment variable"); | |
1380 | } | |
1381 | #endif | |
1382 | } | |
1383 | ||
1384 | Status DelEnvVar(const std::string& name) { return DelEnvVar(name.c_str()); } | |
1385 | ||
1386 | // | |
1387 | // Temporary directories | |
1388 | // | |
1389 | ||
1390 | namespace { | |
1391 | ||
1392 | #if _WIN32 | |
1393 | NativePathString GetWindowsDirectoryPath() { | |
1394 | auto size = GetWindowsDirectoryW(nullptr, 0); | |
1395 | ARROW_CHECK_GT(size, 0) << "GetWindowsDirectoryW failed"; | |
1396 | std::vector<wchar_t> w_str(size); | |
1397 | size = GetWindowsDirectoryW(w_str.data(), size); | |
1398 | ARROW_CHECK_GT(size, 0) << "GetWindowsDirectoryW failed"; | |
1399 | return {w_str.data(), size}; | |
1400 | } | |
1401 | #endif | |
1402 | ||
1403 | // Return a list of preferred locations for temporary files | |
1404 | std::vector<NativePathString> GetPlatformTemporaryDirs() { | |
1405 | struct TempDirSelector { | |
1406 | std::string env_var; | |
1407 | NativePathString path_append; | |
1408 | }; | |
1409 | ||
1410 | std::vector<TempDirSelector> selectors; | |
1411 | NativePathString fallback_tmp; | |
1412 | ||
1413 | #if _WIN32 | |
1414 | selectors = { | |
1415 | {"TMP", L""}, {"TEMP", L""}, {"LOCALAPPDATA", L"Temp"}, {"USERPROFILE", L"Temp"}}; | |
1416 | fallback_tmp = GetWindowsDirectoryPath(); | |
1417 | ||
1418 | #else | |
1419 | selectors = {{"TMPDIR", ""}, {"TMP", ""}, {"TEMP", ""}, {"TEMPDIR", ""}}; | |
1420 | #ifdef __ANDROID__ | |
1421 | fallback_tmp = "/data/local/tmp"; | |
1422 | #else | |
1423 | fallback_tmp = "/tmp"; | |
1424 | #endif | |
1425 | #endif | |
1426 | ||
1427 | std::vector<NativePathString> temp_dirs; | |
1428 | for (const auto& sel : selectors) { | |
1429 | auto result = GetEnvVarNative(sel.env_var); | |
1430 | if (result.status().IsKeyError()) { | |
1431 | // Environment variable absent, skip | |
1432 | continue; | |
1433 | } | |
1434 | if (!result.ok()) { | |
1435 | ARROW_LOG(WARNING) << "Failed getting env var '" << sel.env_var | |
1436 | << "': " << result.status().ToString(); | |
1437 | continue; | |
1438 | } | |
1439 | NativePathString p = *std::move(result); | |
1440 | if (p.empty()) { | |
1441 | // Environment variable set to empty string, skip | |
1442 | continue; | |
1443 | } | |
1444 | if (sel.path_append.empty()) { | |
1445 | temp_dirs.push_back(p); | |
1446 | } else { | |
1447 | temp_dirs.push_back(p + kNativeSep + sel.path_append); | |
1448 | } | |
1449 | } | |
1450 | temp_dirs.push_back(fallback_tmp); | |
1451 | return temp_dirs; | |
1452 | } | |
1453 | ||
1454 | std::string MakeRandomName(int num_chars) { | |
1455 | static const std::string chars = "0123456789abcdefghijklmnopqrstuvwxyz"; | |
1456 | std::default_random_engine gen( | |
1457 | static_cast<std::default_random_engine::result_type>(GetRandomSeed())); | |
1458 | std::uniform_int_distribution<int> dist(0, static_cast<int>(chars.length() - 1)); | |
1459 | ||
1460 | std::string s; | |
1461 | s.reserve(num_chars); | |
1462 | for (int i = 0; i < num_chars; ++i) { | |
1463 | s += chars[dist(gen)]; | |
1464 | } | |
1465 | return s; | |
1466 | } | |
1467 | ||
1468 | } // namespace | |
1469 | ||
1470 | Result<std::unique_ptr<TemporaryDir>> TemporaryDir::Make(const std::string& prefix) { | |
1471 | const int kNumChars = 8; | |
1472 | ||
1473 | NativePathString base_name; | |
1474 | ||
1475 | auto MakeBaseName = [&]() { | |
1476 | std::string suffix = MakeRandomName(kNumChars); | |
1477 | return StringToNative(prefix + suffix); | |
1478 | }; | |
1479 | ||
1480 | auto TryCreatingDirectory = | |
1481 | [&](const NativePathString& base_dir) -> Result<std::unique_ptr<TemporaryDir>> { | |
1482 | Status st; | |
1483 | for (int attempt = 0; attempt < 3; ++attempt) { | |
1484 | PlatformFilename fn(base_dir + kNativeSep + base_name + kNativeSep); | |
1485 | auto result = CreateDir(fn); | |
1486 | if (!result.ok()) { | |
1487 | // Probably a permissions error or a non-existing base_dir | |
1488 | return nullptr; | |
1489 | } | |
1490 | if (*result) { | |
1491 | return std::unique_ptr<TemporaryDir>(new TemporaryDir(std::move(fn))); | |
1492 | } | |
1493 | // The random name already exists in base_dir, try with another name | |
1494 | st = Status::IOError("Path already exists: '", fn.ToString(), "'"); | |
1495 | ARROW_ASSIGN_OR_RAISE(base_name, MakeBaseName()); | |
1496 | } | |
1497 | return st; | |
1498 | }; | |
1499 | ||
1500 | ARROW_ASSIGN_OR_RAISE(base_name, MakeBaseName()); | |
1501 | ||
1502 | auto base_dirs = GetPlatformTemporaryDirs(); | |
1503 | DCHECK_NE(base_dirs.size(), 0); | |
1504 | ||
1505 | for (const auto& base_dir : base_dirs) { | |
1506 | ARROW_ASSIGN_OR_RAISE(auto ptr, TryCreatingDirectory(base_dir)); | |
1507 | if (ptr) { | |
1508 | return std::move(ptr); | |
1509 | } | |
1510 | // Cannot create in this directory, try the next one | |
1511 | } | |
1512 | ||
1513 | return Status::IOError( | |
1514 | "Cannot create temporary subdirectory in any " | |
1515 | "of the platform temporary directories"); | |
1516 | } | |
1517 | ||
1518 | TemporaryDir::TemporaryDir(PlatformFilename&& path) : path_(std::move(path)) {} | |
1519 | ||
1520 | TemporaryDir::~TemporaryDir() { | |
1521 | Status st = DeleteDirTree(path_).status(); | |
1522 | if (!st.ok()) { | |
1523 | ARROW_LOG(WARNING) << "When trying to delete temporary directory: " << st; | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | SignalHandler::SignalHandler() : SignalHandler(static_cast<Callback>(nullptr)) {} | |
1528 | ||
1529 | SignalHandler::SignalHandler(Callback cb) { | |
1530 | #if ARROW_HAVE_SIGACTION | |
1531 | sa_.sa_handler = cb; | |
1532 | sa_.sa_flags = 0; | |
1533 | sigemptyset(&sa_.sa_mask); | |
1534 | #else | |
1535 | cb_ = cb; | |
1536 | #endif | |
1537 | } | |
1538 | ||
1539 | #if ARROW_HAVE_SIGACTION | |
1540 | SignalHandler::SignalHandler(const struct sigaction& sa) { | |
1541 | memcpy(&sa_, &sa, sizeof(sa)); | |
1542 | } | |
1543 | #endif | |
1544 | ||
1545 | SignalHandler::Callback SignalHandler::callback() const { | |
1546 | #if ARROW_HAVE_SIGACTION | |
1547 | return sa_.sa_handler; | |
1548 | #else | |
1549 | return cb_; | |
1550 | #endif | |
1551 | } | |
1552 | ||
1553 | #if ARROW_HAVE_SIGACTION | |
1554 | const struct sigaction& SignalHandler::action() const { return sa_; } | |
1555 | #endif | |
1556 | ||
1557 | Result<SignalHandler> GetSignalHandler(int signum) { | |
1558 | #if ARROW_HAVE_SIGACTION | |
1559 | struct sigaction sa; | |
1560 | int ret = sigaction(signum, nullptr, &sa); | |
1561 | if (ret != 0) { | |
1562 | // TODO more detailed message using errno | |
1563 | return Status::IOError("sigaction call failed"); | |
1564 | } | |
1565 | return SignalHandler(sa); | |
1566 | #else | |
1567 | // To read the old handler, set the signal handler to something else temporarily | |
1568 | SignalHandler::Callback cb = signal(signum, SIG_IGN); | |
1569 | if (cb == SIG_ERR || signal(signum, cb) == SIG_ERR) { | |
1570 | // TODO more detailed message using errno | |
1571 | return Status::IOError("signal call failed"); | |
1572 | } | |
1573 | return SignalHandler(cb); | |
1574 | #endif | |
1575 | } | |
1576 | ||
1577 | Result<SignalHandler> SetSignalHandler(int signum, const SignalHandler& handler) { | |
1578 | #if ARROW_HAVE_SIGACTION | |
1579 | struct sigaction old_sa; | |
1580 | int ret = sigaction(signum, &handler.action(), &old_sa); | |
1581 | if (ret != 0) { | |
1582 | // TODO more detailed message using errno | |
1583 | return Status::IOError("sigaction call failed"); | |
1584 | } | |
1585 | return SignalHandler(old_sa); | |
1586 | #else | |
1587 | SignalHandler::Callback cb = signal(signum, handler.callback()); | |
1588 | if (cb == SIG_ERR) { | |
1589 | // TODO more detailed message using errno | |
1590 | return Status::IOError("signal call failed"); | |
1591 | } | |
1592 | return SignalHandler(cb); | |
1593 | #endif | |
1594 | return Status::OK(); | |
1595 | } | |
1596 | ||
1597 | void ReinstateSignalHandler(int signum, SignalHandler::Callback handler) { | |
1598 | #if !ARROW_HAVE_SIGACTION | |
1599 | // Cannot report any errors from signal() (but there shouldn't be any) | |
1600 | signal(signum, handler); | |
1601 | #endif | |
1602 | } | |
1603 | ||
1604 | Status SendSignal(int signum) { | |
1605 | if (raise(signum) == 0) { | |
1606 | return Status::OK(); | |
1607 | } | |
1608 | if (errno == EINVAL) { | |
1609 | return Status::Invalid("Invalid signal number ", signum); | |
1610 | } | |
1611 | return IOErrorFromErrno(errno, "Failed to raise signal"); | |
1612 | } | |
1613 | ||
1614 | Status SendSignalToThread(int signum, uint64_t thread_id) { | |
1615 | #ifdef _WIN32 | |
1616 | return Status::NotImplemented("Cannot send signal to specific thread on Windows"); | |
1617 | #else | |
1618 | // Have to use a C-style cast because pthread_t can be a pointer *or* integer type | |
1619 | int r = pthread_kill((pthread_t)thread_id, signum); // NOLINT readability-casting | |
1620 | if (r == 0) { | |
1621 | return Status::OK(); | |
1622 | } | |
1623 | if (r == EINVAL) { | |
1624 | return Status::Invalid("Invalid signal number ", signum); | |
1625 | } | |
1626 | return IOErrorFromErrno(r, "Failed to raise signal"); | |
1627 | #endif | |
1628 | } | |
1629 | ||
1630 | namespace { | |
1631 | ||
1632 | int64_t GetPid() { | |
1633 | #ifdef _WIN32 | |
1634 | return GetCurrentProcessId(); | |
1635 | #else | |
1636 | return getpid(); | |
1637 | #endif | |
1638 | } | |
1639 | ||
1640 | std::mt19937_64 GetSeedGenerator() { | |
1641 | // Initialize Mersenne Twister PRNG with a true random seed. | |
1642 | // Make sure to mix in process id to minimize risks of clashes when parallel testing. | |
1643 | #ifdef ARROW_VALGRIND | |
1644 | // Valgrind can crash, hang or enter an infinite loop on std::random_device, | |
1645 | // use a crude initializer instead. | |
1646 | const uint8_t dummy = 0; | |
1647 | ARROW_UNUSED(dummy); | |
1648 | std::mt19937_64 seed_gen(reinterpret_cast<uintptr_t>(&dummy) ^ | |
1649 | static_cast<uintptr_t>(GetPid())); | |
1650 | #else | |
1651 | std::random_device true_random; | |
1652 | std::mt19937_64 seed_gen(static_cast<uint64_t>(true_random()) ^ | |
1653 | (static_cast<uint64_t>(true_random()) << 32) ^ | |
1654 | static_cast<uint64_t>(GetPid())); | |
1655 | #endif | |
1656 | return seed_gen; | |
1657 | } | |
1658 | ||
1659 | } // namespace | |
1660 | ||
1661 | int64_t GetRandomSeed() { | |
1662 | // The process-global seed generator to aims to avoid calling std::random_device | |
1663 | // unless truly necessary (it can block on some systems, see ARROW-10287). | |
1664 | static auto seed_gen = GetSeedGenerator(); | |
1665 | return static_cast<int64_t>(seed_gen()); | |
1666 | } | |
1667 | ||
1668 | uint64_t GetThreadId() { | |
1669 | uint64_t equiv{0}; | |
1670 | // std::thread::id is trivially copyable as per C++ spec, | |
1671 | // so type punning as a uint64_t should work | |
1672 | static_assert(sizeof(std::thread::id) <= sizeof(uint64_t), | |
1673 | "std::thread::id can't fit into uint64_t"); | |
1674 | const auto tid = std::this_thread::get_id(); | |
1675 | memcpy(&equiv, reinterpret_cast<const void*>(&tid), sizeof(tid)); | |
1676 | return equiv; | |
1677 | } | |
1678 | ||
1679 | uint64_t GetOptionalThreadId() { | |
1680 | auto tid = GetThreadId(); | |
1681 | return (tid == 0) ? tid - 1 : tid; | |
1682 | } | |
1683 | ||
1684 | } // namespace internal | |
1685 | } // namespace arrow |