The Tor Browser: ipc/chromium/src/base/waitable_event_watcher

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 "base/waitable_event_watcher.h"

     7 #include "base/compiler_specific.h"

     8 #include "base/object_watcher.h"

     9 #include "base/waitable_event.h"

    11 namespace base {

    13 WaitableEventWatcher::ObjectWatcherHelper::ObjectWatcherHelper(

    14     WaitableEventWatcher* watcher)

    15     : watcher_(watcher) {

    16 };

    18 void WaitableEventWatcher::ObjectWatcherHelper::OnObjectSignaled(HANDLE h) {

    19   watcher_->OnObjectSignaled();

    20 }

    23 WaitableEventWatcher::WaitableEventWatcher()

    24     : event_(NULL),

    25       ALLOW_THIS_IN_INITIALIZER_LIST(helper_(this)),

    26       delegate_(NULL) {

    27 }

    29 WaitableEventWatcher::~WaitableEventWatcher() {

    30 }

    32 bool WaitableEventWatcher::StartWatching(WaitableEvent* event,

    33                                          Delegate* delegate) {

    34   delegate_ = delegate;

    35   event_ = event;

    37   return watcher_.StartWatching(event->handle(), &helper_);

    38 }

    40 void WaitableEventWatcher::StopWatching() {

    41   delegate_ = NULL;

    42   event_ = NULL;

    43   watcher_.StopWatching();

    44 }

    46 WaitableEvent* WaitableEventWatcher::GetWatchedEvent() {

    47   return event_;

    48 }

    50 void WaitableEventWatcher::OnObjectSignaled() {

    51   WaitableEvent* event = event_;

    52   Delegate* delegate = delegate_;

    53   event_ = NULL;

    54   delegate_ = NULL;

    55   DCHECK(event);

    57   delegate->OnWaitableEventSignaled(event);

    58 }

    60 }  // namespace base

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