ipc/glue/BrowserProcessSubThread.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/ipc/BrowserProcessSubThread.h"
   8 #include "mozilla/ipc/NodeController.h"
   9
  10 #if defined(XP_WIN)
  11 #  include <objbase.h>
  12 #endif
  13
  14 namespace mozilla {
  15 namespace ipc {
  16
  17 //
  18 // BrowserProcessSubThread
  19 //
  20
  21 // Friendly names for the well-known threads.
  22 static const char* kBrowserThreadNames[BrowserProcessSubThread::ID_COUNT] = {
  23     "IPC I/O Parent",  // IO
  24 };
  25
  26 /* static */
  27 StaticMutex BrowserProcessSubThread::sLock;
  28 BrowserProcessSubThread* BrowserProcessSubThread::sBrowserThreads[ID_COUNT] = {
  29     nullptr,  // IO
  30 };
  31
  32 BrowserProcessSubThread::BrowserProcessSubThread(ID aId)
  33     : base::Thread(kBrowserThreadNames[aId]), mIdentifier(aId) {
  34   StaticMutexAutoLock lock(sLock);
  35   DCHECK(aId >= 0 && aId < ID_COUNT);
  36   DCHECK(sBrowserThreads[aId] == nullptr);
  37   sBrowserThreads[aId] = this;
  38 }
  39
  40 BrowserProcessSubThread::~BrowserProcessSubThread() {
  41   Stop();
  42   {
  43     StaticMutexAutoLock lock(sLock);
  44     sBrowserThreads[mIdentifier] = nullptr;
  45   }
  46 }
  47
  48 void BrowserProcessSubThread::Init() {
  49 #if defined(XP_WIN)
  50   // Initializes the COM library on the current thread.
  51   CoInitialize(nullptr);
  52 #endif
  53
  54   // Initialize the ports library in the current thread.
  55   if (mIdentifier == IO) {
  56     NodeController::InitBrokerProcess();
  57   }
  58 }
  59
  60 void BrowserProcessSubThread::CleanUp() {
  61   if (mIdentifier == IO) {
  62     NodeController::CleanUp();
  63   }
  64
  65 #if defined(XP_WIN)
  66   // Closes the COM library on the current thread. CoInitialize must
  67   // be balanced by a corresponding call to CoUninitialize.
  68   CoUninitialize();
  69 #endif
  70 }
  71
  72 // static
  73 MessageLoop* BrowserProcessSubThread::GetMessageLoop(ID aId) {
  74   StaticMutexAutoLock lock(sLock);
  75   DCHECK(aId >= 0 && aId < ID_COUNT);
  76
  77   if (sBrowserThreads[aId]) return sBrowserThreads[aId]->message_loop();
  78
  79   return nullptr;
  80 }
  81
  82 }  // namespace ipc
  83 }  // namespace mozilla