The Tor Browser: ipc/chromium/src/chrome/common/child

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style license that can be

     3 // found in the LICENSE file.

     5 #include "chrome/common/child_process.h"

     7 #include "base/basictypes.h"

     8 #include "base/string_util.h"

     9 #include "chrome/common/child_thread.h"

    11 ChildProcess* ChildProcess::child_process_;

    13 ChildProcess::ChildProcess(ChildThread* child_thread)

    14     : child_thread_(child_thread),

    15       ref_count_(0),

    16       shutdown_event_(true, false) {

    17   DCHECK(!child_process_);

    18   child_process_ = this;

    19   if (child_thread_.get())  // null in unittests.

    20     child_thread_->Run();

    21 }

    23 ChildProcess::~ChildProcess() {

    24   DCHECK(child_process_ == this);

    26   // Signal this event before destroying the child process.  That way all

    27   // background threads can cleanup.

    28   // For example, in the renderer the RenderThread instances will be able to

    29   // notice shutdown before the render process begins waiting for them to exit.

    30   shutdown_event_.Signal();

    32   if (child_thread_.get())

    33     child_thread_->Stop();

    35   child_process_ = NULL;

    36 }

    38 void ChildProcess::AddRefProcess() {

    39   DCHECK(!child_thread_.get() ||  // null in unittests.

    40          MessageLoop::current() == child_thread_->message_loop());

    41   ref_count_++;

    42 }

    44 void ChildProcess::ReleaseProcess() {

    45   DCHECK(!child_thread_.get() ||  // null in unittests.

    46          MessageLoop::current() == child_thread_->message_loop());

    47   DCHECK(ref_count_);

    48   DCHECK(child_process_);

    49   if (--ref_count_)

    50     return;

    52   if (child_thread_.get())  // null in unittests.

    53     child_thread_->OnProcessFinalRelease();

    54 }

    56 base::WaitableEvent* ChildProcess::GetShutDownEvent() {

    57   DCHECK(child_process_);

    58   return &child_process_->shutdown_event_;

    59 }

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