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// Copyright (c) 2011 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 "webkit/quota/quota_task.h"
#include <algorithm>
#include <functional>
#include "base/message_loop.h"
#include "base/message_loop_proxy.h"
using base::MessageLoopProxy;
namespace quota {
// QuotaTask ---------------------------------------------------------------
QuotaTask::~QuotaTask() {
}
void QuotaTask::Start() {
DCHECK(observer_);
observer()->RegisterTask(this);
Run();
}
QuotaTask::QuotaTask(QuotaTaskObserver* observer)
: observer_(observer),
original_message_loop_(MessageLoopProxy::current()) {
}
void QuotaTask::CallCompleted() {
DCHECK(original_message_loop_->BelongsToCurrentThread());
if (observer_) {
observer_->UnregisterTask(this);
Completed();
}
}
void QuotaTask::Abort() {
DCHECK(original_message_loop_->BelongsToCurrentThread());
observer_ = NULL;
Aborted();
}
void QuotaTask::DeleteSoon() {
MessageLoop::current()->DeleteSoon(FROM_HERE, this);
}
// QuotaThreadTask ---------------------------------------------------------
QuotaThreadTask::QuotaThreadTask(
QuotaTaskObserver* observer,
scoped_refptr<MessageLoopProxy> target_message_loop)
: QuotaTask(observer),
target_message_loop_(target_message_loop) {
}
QuotaThreadTask::~QuotaThreadTask() {
}
void QuotaThreadTask::Run() {
target_message_loop_->PostTask(FROM_HERE, NewRunnableMethod(
this, &QuotaThreadTask::CallRunOnTargetThread));
}
void QuotaThreadTask::CallRunOnTargetThread() {
DCHECK(target_message_loop_->BelongsToCurrentThread());
if (RunOnTargetThreadAsync())
original_message_loop()->PostTask(
FROM_HERE, NewRunnableMethod(this, &QuotaThreadTask::CallCompleted));
}
bool QuotaThreadTask::RunOnTargetThreadAsync() {
RunOnTargetThread();
return true;
}
void QuotaThreadTask::RunOnTargetThread() {
}
// QuotaTaskObserver -------------------------------------------------------
QuotaTaskObserver::~QuotaTaskObserver() {
std::for_each(running_quota_tasks_.begin(),
running_quota_tasks_.end(),
std::mem_fun(&QuotaTask::Abort));
}
QuotaTaskObserver::QuotaTaskObserver() {
}
void QuotaTaskObserver::RegisterTask(QuotaTask* task) {
running_quota_tasks_.insert(task);
}
void QuotaTaskObserver::UnregisterTask(QuotaTask* task) {
DCHECK(running_quota_tasks_.find(task) != running_quota_tasks_.end());
running_quota_tasks_.erase(task);
}
} // namespace quota
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