Refactor ChildProcess and related classes to create a framework outside of br...

chrome/common/child_process.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/common/child_process.h"
 
 #include "app/l10n_util.h"
 #include "base/message_loop.h"
 #include "base/process_util.h"
 #include "base/string_util.h"
-#include "chrome/common/child_thread.h"
 #include "grit/chromium_strings.h"
 
-#if defined(OS_POSIX)
-#include <signal.h>
-
-static void SigUSR1Handler(int signal) { }
-#endif
-
-ChildProcess* ChildProcess::child_process_;
-
 ChildProcess::ChildProcess()
-    : ref_count_(0),
-      shutdown_event_(true, false),
-      io_thread_("Chrome_ChildIOThread") {
-  DCHECK(!child_process_);
-  child_process_ = this;
-
+    : io_thread_("Chrome_ChildIOThread") {
   io_thread_.StartWithOptions(base::Thread::Options(MessageLoop::TYPE_IO, 0));
 }
 
 ChildProcess::~ChildProcess() {
-  DCHECK(child_process_ == this);
-
-  // Signal this event before destroying the child process.  That way all
-  // background threads can cleanup.
-  // For example, in the renderer the RenderThread instances will be able to
-  // notice shutdown before the render process begins waiting for them to exit.
-  shutdown_event_.Signal();
-
-  // Kill the main thread object before nulling child_process_, since
-  // destruction code might depend on it.
-  main_thread_.reset();
-
-  child_process_ = NULL;
-}
-
-void ChildProcess::AddRefProcess() {
-  DCHECK(!main_thread_.get() ||  // null in unittests.
-         MessageLoop::current() == main_thread_->message_loop());
-  ref_count_++;
-}
-
-void ChildProcess::ReleaseProcess() {
-  DCHECK(!main_thread_.get() ||  // null in unittests.
-         MessageLoop::current() == main_thread_->message_loop());
-  DCHECK(ref_count_);
-  DCHECK(child_process_);
-  if (--ref_count_)
-    return;
-
-  if (main_thread_.get())  // null in unittests.
-    main_thread_->OnProcessFinalRelease();
-}
-
-base::WaitableEvent* ChildProcess::GetShutDownEvent() {
-  DCHECK(child_process_);
-  return &child_process_->shutdown_event_;
 }
 
 void ChildProcess::WaitForDebugger(const std::wstring& label) {
 #if defined(OS_WIN)
     std::wstring title = l10n_util::GetString(IDS_PRODUCT_NAME);
     std::wstring message = label;
     message += L" starting with pid: ";
     message += IntToWString(base::GetCurrentProcId());
     title += L" ";
     title += label;  // makes attaching to process easier
     ::MessageBox(NULL, message.c_str(), title.c_str(),
                  MB_OK | MB_SETFOREGROUND);
 #elif defined(OS_POSIX)
     // TODO(playmobil): In the long term, overriding this flag doesn't seem
     // right, either use our own flag or open a dialog we can use.
     // This is just to ease debugging in the interim.
     LOG(WARNING) << label
                  << " ("
                  << getpid()
                  << ") paused waiting for debugger to attach @ pid";
     // Install a signal handler so that pause can be woken.
     struct sigaction sa;
     memset(&sa, 0, sizeof(sa));
     sa.sa_handler = SigUSR1Handler;
     sigaction(SIGUSR1, &sa, NULL);
 
     pause();
 #endif  // defined(OS_POSIX)
 }