ceph/src/arrow/cpp/src/plasma/plasma.cc

   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 #include "plasma/plasma.h"
  19
  20 #include <sys/socket.h>
  21 #include <sys/types.h>
  22 #include <unistd.h>
  23
  24 #include "plasma/common.h"
  25 #include "plasma/common_generated.h"
  26 #include "plasma/protocol.h"
  27
  28 namespace fb = plasma::flatbuf;
  29
  30 namespace plasma {
  31
  32 ObjectTableEntry::ObjectTableEntry() : pointer(nullptr), ref_count(0) {}
  33
  34 ObjectTableEntry::~ObjectTableEntry() { pointer = nullptr; }
  35
  36 int WarnIfSigpipe(int status, int client_sock) {
  37   if (status >= 0) {
  38     return 0;
  39   }
  40   if (errno == EPIPE || errno == EBADF || errno == ECONNRESET) {
  41     ARROW_LOG(WARNING) << "Received SIGPIPE, BAD FILE DESCRIPTOR, or ECONNRESET when "
  42                           "sending a message to client on fd "
  43                        << client_sock
  44                        << ". The client on the other end may "
  45                           "have hung up.";
  46     return errno;
  47   }
  48   ARROW_LOG(FATAL) << "Failed to write message to client on fd " << client_sock << ".";
  49   return -1;  // This is never reached.
  50 }
  51
  52 /**
  53  * This will create a new ObjectInfo buffer. The first sizeof(int64_t) bytes
  54  * of this buffer are the length of the remaining message and the
  55  * remaining message is a serialized version of the object info.
  56  *
  57  * \param object_info The object info to be serialized
  58  * \return The object info buffer. It is the caller's responsibility to free
  59  *         this buffer with "delete" after it has been used.
  60  */
  61 std::unique_ptr<uint8_t[]> CreateObjectInfoBuffer(fb::ObjectInfoT* object_info) {
  62   flatbuffers::FlatBufferBuilder fbb;
  63   auto message = fb::CreateObjectInfo(fbb, object_info);
  64   fbb.Finish(message);
  65   auto notification =
  66       std::unique_ptr<uint8_t[]>(new uint8_t[sizeof(int64_t) + fbb.GetSize()]);
  67   *(reinterpret_cast<int64_t*>(notification.get())) = fbb.GetSize();
  68   memcpy(notification.get() + sizeof(int64_t), fbb.GetBufferPointer(), fbb.GetSize());
  69   return notification;
  70 }
  71
  72 std::unique_ptr<uint8_t[]> CreatePlasmaNotificationBuffer(
  73     std::vector<fb::ObjectInfoT>& object_info) {
  74   flatbuffers::FlatBufferBuilder fbb;
  75   std::vector<flatbuffers::Offset<plasma::flatbuf::ObjectInfo>> info;
  76   for (size_t i = 0; i < object_info.size(); ++i) {
  77     info.push_back(fb::CreateObjectInfo(fbb, &object_info[i]));
  78   }
  79
  80   auto info_array = fbb.CreateVector(info);
  81   auto message = fb::CreatePlasmaNotification(fbb, info_array);
  82   fbb.Finish(message);
  83   auto notification =
  84       std::unique_ptr<uint8_t[]>(new uint8_t[sizeof(int64_t) + fbb.GetSize()]);
  85   *(reinterpret_cast<int64_t*>(notification.get())) = fbb.GetSize();
  86   memcpy(notification.get() + sizeof(int64_t), fbb.GetBufferPointer(), fbb.GetSize());
  87   return notification;
  88 }
  89
  90 ObjectTableEntry* GetObjectTableEntry(PlasmaStoreInfo* store_info,
  91                                       const ObjectID& object_id) {
  92   auto it = store_info->objects.find(object_id);
  93   if (it == store_info->objects.end()) {
  94     return NULL;
  95   }
  96   return it->second.get();
  97 }
  98
  99 }  // namespace plasma