]>
Commit | Line | Data |
---|---|---|
7c673cae | 1 | // Copyright (c) 2011-present, Facebook, Inc. All rights reserved. |
11fdf7f2 TL |
2 | // This source code is licensed under both the GPLv2 (found in the |
3 | // COPYING file in the root directory) and Apache 2.0 License | |
4 | // (found in the LICENSE.Apache file in the root directory). | |
7c673cae FG |
5 | // |
6 | // Copyright (c) 2011 The LevelDB Authors. All rights reserved. | |
7 | // Use of this source code is governed by a BSD-style license that can be | |
8 | // found in the LICENSE file. See the AUTHORS file for names of contributors. | |
9 | // | |
10 | // See port_example.h for documentation for the following types/functions. | |
11 | ||
11fdf7f2 | 12 | #pragma once |
7c673cae FG |
13 | |
14 | // Always want minimum headers | |
15 | #ifndef WIN32_LEAN_AND_MEAN | |
16 | #define WIN32_LEAN_AND_MEAN | |
17 | #endif | |
18 | ||
19 | // Assume that for everywhere | |
20 | #undef PLATFORM_IS_LITTLE_ENDIAN | |
21 | #define PLATFORM_IS_LITTLE_ENDIAN true | |
22 | ||
23 | #include <windows.h> | |
24 | #include <string> | |
25 | #include <string.h> | |
26 | #include <mutex> | |
27 | #include <limits> | |
28 | #include <condition_variable> | |
11fdf7f2 TL |
29 | #include <malloc.h> |
30 | #include <intrin.h> | |
7c673cae FG |
31 | |
32 | #include <stdint.h> | |
33 | ||
34 | #include "port/win/win_thread.h" | |
35 | ||
36 | #include "rocksdb/options.h" | |
37 | ||
38 | #undef min | |
39 | #undef max | |
40 | #undef DeleteFile | |
41 | #undef GetCurrentTime | |
42 | ||
43 | ||
44 | #ifndef strcasecmp | |
45 | #define strcasecmp _stricmp | |
46 | #endif | |
47 | ||
48 | #undef GetCurrentTime | |
49 | #undef DeleteFile | |
50 | ||
51 | #ifndef _SSIZE_T_DEFINED | |
52 | typedef SSIZE_T ssize_t; | |
53 | #endif | |
54 | ||
55 | // size_t printf formatting named in the manner of C99 standard formatting | |
56 | // strings such as PRIu64 | |
57 | // in fact, we could use that one | |
58 | #ifndef ROCKSDB_PRIszt | |
59 | #define ROCKSDB_PRIszt "Iu" | |
60 | #endif | |
61 | ||
62 | #ifdef _MSC_VER | |
63 | #define __attribute__(A) | |
64 | ||
65 | // Thread local storage on Linux | |
66 | // There is thread_local in C++11 | |
67 | #ifndef __thread | |
68 | #define __thread __declspec(thread) | |
69 | #endif | |
70 | ||
71 | #endif | |
72 | ||
73 | #ifndef PLATFORM_IS_LITTLE_ENDIAN | |
74 | #define PLATFORM_IS_LITTLE_ENDIAN (__BYTE_ORDER == __LITTLE_ENDIAN) | |
75 | #endif | |
76 | ||
77 | namespace rocksdb { | |
78 | ||
79 | #define PREFETCH(addr, rw, locality) | |
80 | ||
494da23a TL |
81 | extern const bool kDefaultToAdaptiveMutex; |
82 | ||
7c673cae FG |
83 | namespace port { |
84 | ||
11fdf7f2 TL |
85 | // VS < 2015 |
86 | #if defined(_MSC_VER) && (_MSC_VER < 1900) | |
7c673cae FG |
87 | |
88 | // VS 15 has snprintf | |
89 | #define snprintf _snprintf | |
90 | ||
91 | #define ROCKSDB_NOEXCEPT | |
92 | // std::numeric_limits<size_t>::max() is not constexpr just yet | |
93 | // therefore, use the same limits | |
94 | ||
95 | // For use at db/file_indexer.h kLevelMaxIndex | |
11fdf7f2 | 96 | const uint32_t kMaxUint32 = UINT32_MAX; |
7c673cae | 97 | const int kMaxInt32 = INT32_MAX; |
494da23a | 98 | const int kMinInt32 = INT32_MIN; |
7c673cae | 99 | const int64_t kMaxInt64 = INT64_MAX; |
494da23a | 100 | const int64_t kMinInt64 = INT64_MIN; |
7c673cae FG |
101 | const uint64_t kMaxUint64 = UINT64_MAX; |
102 | ||
103 | #ifdef _WIN64 | |
104 | const size_t kMaxSizet = UINT64_MAX; | |
105 | #else | |
106 | const size_t kMaxSizet = UINT_MAX; | |
107 | #endif | |
108 | ||
11fdf7f2 TL |
109 | #else // VS >= 2015 or MinGW |
110 | ||
111 | #define ROCKSDB_NOEXCEPT noexcept | |
112 | ||
113 | // For use at db/file_indexer.h kLevelMaxIndex | |
114 | const uint32_t kMaxUint32 = std::numeric_limits<uint32_t>::max(); | |
115 | const int kMaxInt32 = std::numeric_limits<int>::max(); | |
494da23a | 116 | const int kMinInt32 = std::numeric_limits<int>::min(); |
11fdf7f2 TL |
117 | const uint64_t kMaxUint64 = std::numeric_limits<uint64_t>::max(); |
118 | const int64_t kMaxInt64 = std::numeric_limits<int64_t>::max(); | |
494da23a | 119 | const int64_t kMinInt64 = std::numeric_limits<int64_t>::min(); |
11fdf7f2 TL |
120 | |
121 | const size_t kMaxSizet = std::numeric_limits<size_t>::max(); | |
122 | ||
7c673cae FG |
123 | #endif //_MSC_VER |
124 | ||
125 | const bool kLittleEndian = true; | |
126 | ||
127 | class CondVar; | |
128 | ||
129 | class Mutex { | |
130 | public: | |
131 | ||
494da23a | 132 | /* implicit */ Mutex(bool adaptive = kDefaultToAdaptiveMutex) |
7c673cae FG |
133 | #ifndef NDEBUG |
134 | : locked_(false) | |
135 | #endif | |
136 | { } | |
137 | ||
138 | ~Mutex(); | |
139 | ||
140 | void Lock() { | |
141 | mutex_.lock(); | |
142 | #ifndef NDEBUG | |
143 | locked_ = true; | |
144 | #endif | |
145 | } | |
146 | ||
147 | void Unlock() { | |
148 | #ifndef NDEBUG | |
149 | locked_ = false; | |
150 | #endif | |
151 | mutex_.unlock(); | |
152 | } | |
153 | ||
154 | // this will assert if the mutex is not locked | |
155 | // it does NOT verify that mutex is held by a calling thread | |
156 | void AssertHeld() { | |
157 | #ifndef NDEBUG | |
158 | assert(locked_); | |
159 | #endif | |
160 | } | |
161 | ||
162 | // Mutex is move only with lock ownership transfer | |
163 | Mutex(const Mutex&) = delete; | |
164 | void operator=(const Mutex&) = delete; | |
165 | ||
166 | private: | |
167 | ||
168 | friend class CondVar; | |
169 | ||
170 | std::mutex& getLock() { | |
171 | return mutex_; | |
172 | } | |
173 | ||
174 | std::mutex mutex_; | |
175 | #ifndef NDEBUG | |
176 | bool locked_; | |
177 | #endif | |
178 | }; | |
179 | ||
180 | class RWMutex { | |
181 | public: | |
182 | RWMutex() { InitializeSRWLock(&srwLock_); } | |
183 | ||
184 | void ReadLock() { AcquireSRWLockShared(&srwLock_); } | |
185 | ||
186 | void WriteLock() { AcquireSRWLockExclusive(&srwLock_); } | |
187 | ||
188 | void ReadUnlock() { ReleaseSRWLockShared(&srwLock_); } | |
189 | ||
190 | void WriteUnlock() { ReleaseSRWLockExclusive(&srwLock_); } | |
191 | ||
192 | // Empty as in POSIX | |
193 | void AssertHeld() {} | |
194 | ||
195 | private: | |
196 | SRWLOCK srwLock_; | |
197 | // No copying allowed | |
198 | RWMutex(const RWMutex&); | |
199 | void operator=(const RWMutex&); | |
200 | }; | |
201 | ||
202 | class CondVar { | |
203 | public: | |
204 | explicit CondVar(Mutex* mu) : mu_(mu) { | |
205 | } | |
206 | ||
207 | ~CondVar(); | |
208 | void Wait(); | |
209 | bool TimedWait(uint64_t expiration_time); | |
210 | void Signal(); | |
211 | void SignalAll(); | |
212 | ||
213 | // Condition var is not copy/move constructible | |
214 | CondVar(const CondVar&) = delete; | |
215 | CondVar& operator=(const CondVar&) = delete; | |
216 | ||
217 | CondVar(CondVar&&) = delete; | |
218 | CondVar& operator=(CondVar&&) = delete; | |
219 | ||
220 | private: | |
221 | std::condition_variable cv_; | |
222 | Mutex* mu_; | |
223 | }; | |
224 | ||
225 | // Wrapper around the platform efficient | |
226 | // or otherwise preferrable implementation | |
227 | using Thread = WindowsThread; | |
228 | ||
229 | // OnceInit type helps emulate | |
230 | // Posix semantics with initialization | |
231 | // adopted in the project | |
232 | struct OnceType { | |
233 | ||
234 | struct Init {}; | |
235 | ||
236 | OnceType() {} | |
237 | OnceType(const Init&) {} | |
238 | OnceType(const OnceType&) = delete; | |
239 | OnceType& operator=(const OnceType&) = delete; | |
240 | ||
241 | std::once_flag flag_; | |
242 | }; | |
243 | ||
244 | #define LEVELDB_ONCE_INIT port::OnceType::Init() | |
245 | extern void InitOnce(OnceType* once, void (*initializer)()); | |
246 | ||
11fdf7f2 | 247 | #ifndef CACHE_LINE_SIZE |
7c673cae | 248 | #define CACHE_LINE_SIZE 64U |
11fdf7f2 TL |
249 | #endif |
250 | ||
251 | #ifdef ROCKSDB_JEMALLOC | |
252 | // Separate inlines so they can be replaced if needed | |
253 | void* jemalloc_aligned_alloc(size_t size, size_t alignment) ROCKSDB_NOEXCEPT; | |
254 | void jemalloc_aligned_free(void* p) ROCKSDB_NOEXCEPT; | |
255 | #endif | |
256 | ||
257 | inline void *cacheline_aligned_alloc(size_t size) { | |
258 | #ifdef ROCKSDB_JEMALLOC | |
259 | return jemalloc_aligned_alloc(size, CACHE_LINE_SIZE); | |
260 | #else | |
261 | return _aligned_malloc(size, CACHE_LINE_SIZE); | |
262 | #endif | |
263 | } | |
264 | ||
265 | inline void cacheline_aligned_free(void *memblock) { | |
266 | #ifdef ROCKSDB_JEMALLOC | |
267 | jemalloc_aligned_free(memblock); | |
268 | #else | |
269 | _aligned_free(memblock); | |
270 | #endif | |
271 | } | |
272 | ||
273 | // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52991 for MINGW32 | |
274 | // could not be worked around with by -mno-ms-bitfields | |
275 | #ifndef __MINGW32__ | |
276 | #define ALIGN_AS(n) __declspec(align(n)) | |
277 | #else | |
278 | #define ALIGN_AS(n) | |
279 | #endif | |
7c673cae FG |
280 | |
281 | static inline void AsmVolatilePause() { | |
282 | #if defined(_M_IX86) || defined(_M_X64) | |
283 | YieldProcessor(); | |
284 | #endif | |
285 | // it would be nice to get "wfe" on ARM here | |
286 | } | |
287 | ||
288 | extern int PhysicalCoreID(); | |
289 | ||
290 | // For Thread Local Storage abstraction | |
291 | typedef DWORD pthread_key_t; | |
292 | ||
293 | inline int pthread_key_create(pthread_key_t* key, void (*destructor)(void*)) { | |
294 | // Not used | |
295 | (void)destructor; | |
296 | ||
297 | pthread_key_t k = TlsAlloc(); | |
298 | if (TLS_OUT_OF_INDEXES == k) { | |
299 | return ENOMEM; | |
300 | } | |
301 | ||
302 | *key = k; | |
303 | return 0; | |
304 | } | |
305 | ||
306 | inline int pthread_key_delete(pthread_key_t key) { | |
307 | if (!TlsFree(key)) { | |
308 | return EINVAL; | |
309 | } | |
310 | return 0; | |
311 | } | |
312 | ||
313 | inline int pthread_setspecific(pthread_key_t key, const void* value) { | |
314 | if (!TlsSetValue(key, const_cast<void*>(value))) { | |
315 | return ENOMEM; | |
316 | } | |
317 | return 0; | |
318 | } | |
319 | ||
320 | inline void* pthread_getspecific(pthread_key_t key) { | |
321 | void* result = TlsGetValue(key); | |
322 | if (!result) { | |
323 | if (GetLastError() != ERROR_SUCCESS) { | |
324 | errno = EINVAL; | |
325 | } else { | |
326 | errno = NOERROR; | |
327 | } | |
328 | } | |
329 | return result; | |
330 | } | |
331 | ||
332 | // UNIX equiv although errno numbers will be off | |
333 | // using C-runtime to implement. Note, this does not | |
334 | // feel space with zeros in case the file is extended. | |
335 | int truncate(const char* path, int64_t length); | |
494da23a | 336 | int Truncate(std::string path, int64_t length); |
7c673cae FG |
337 | void Crash(const std::string& srcfile, int srcline); |
338 | extern int GetMaxOpenFiles(); | |
494da23a TL |
339 | std::string utf16_to_utf8(const std::wstring& utf16); |
340 | std::wstring utf8_to_utf16(const std::string& utf8); | |
7c673cae FG |
341 | |
342 | } // namespace port | |
343 | ||
494da23a TL |
344 | |
345 | #ifdef ROCKSDB_WINDOWS_UTF8_FILENAMES | |
346 | ||
347 | #define RX_FILESTRING std::wstring | |
348 | #define RX_FN(a) rocksdb::port::utf8_to_utf16(a) | |
349 | #define FN_TO_RX(a) rocksdb::port::utf16_to_utf8(a) | |
350 | #define RX_FNLEN(a) ::wcslen(a) | |
351 | ||
352 | #define RX_DeleteFile DeleteFileW | |
353 | #define RX_CreateFile CreateFileW | |
354 | #define RX_CreateFileMapping CreateFileMappingW | |
355 | #define RX_GetFileAttributesEx GetFileAttributesExW | |
356 | #define RX_FindFirstFileEx FindFirstFileExW | |
357 | #define RX_FindNextFile FindNextFileW | |
358 | #define RX_WIN32_FIND_DATA WIN32_FIND_DATAW | |
359 | #define RX_CreateDirectory CreateDirectoryW | |
360 | #define RX_RemoveDirectory RemoveDirectoryW | |
361 | #define RX_GetFileAttributesEx GetFileAttributesExW | |
362 | #define RX_MoveFileEx MoveFileExW | |
363 | #define RX_CreateHardLink CreateHardLinkW | |
364 | #define RX_PathIsRelative PathIsRelativeW | |
365 | #define RX_GetCurrentDirectory GetCurrentDirectoryW | |
366 | ||
367 | #else | |
368 | ||
369 | #define RX_FILESTRING std::string | |
370 | #define RX_FN(a) a | |
371 | #define FN_TO_RX(a) a | |
372 | #define RX_FNLEN(a) strlen(a) | |
373 | ||
374 | #define RX_DeleteFile DeleteFileA | |
375 | #define RX_CreateFile CreateFileA | |
376 | #define RX_CreateFileMapping CreateFileMappingA | |
377 | #define RX_GetFileAttributesEx GetFileAttributesExA | |
378 | #define RX_FindFirstFileEx FindFirstFileExA | |
379 | #define RX_CreateDirectory CreateDirectoryA | |
380 | #define RX_FindNextFile FindNextFileA | |
381 | #define RX_WIN32_FIND_DATA WIN32_FIND_DATA | |
382 | #define RX_CreateDirectory CreateDirectoryA | |
383 | #define RX_RemoveDirectory RemoveDirectoryA | |
384 | #define RX_GetFileAttributesEx GetFileAttributesExA | |
385 | #define RX_MoveFileEx MoveFileExA | |
386 | #define RX_CreateHardLink CreateHardLinkA | |
387 | #define RX_PathIsRelative PathIsRelativeA | |
388 | #define RX_GetCurrentDirectory GetCurrentDirectoryA | |
389 | ||
390 | #endif | |
391 | ||
7c673cae FG |
392 | using port::pthread_key_t; |
393 | using port::pthread_key_create; | |
394 | using port::pthread_key_delete; | |
395 | using port::pthread_setspecific; | |
396 | using port::pthread_getspecific; | |
397 | using port::truncate; | |
398 | ||
399 | } // namespace rocksdb |