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// Copyright 2013 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 "extensions/browser/api/system_info/system_info_provider.h"
#include "base/bind.h"
#include "content/public/browser/browser_thread.h"
namespace extensions {
SystemInfoProvider::SystemInfoProvider() : is_waiting_for_completion_(false) {
base::SequencedWorkerPool* pool = content::BrowserThread::GetBlockingPool();
worker_pool_ = pool->GetSequencedTaskRunnerWithShutdownBehavior(
pool->GetSequenceToken(),
base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
}
SystemInfoProvider::~SystemInfoProvider() {
}
void SystemInfoProvider::PrepareQueryOnUIThread() {
}
void SystemInfoProvider::InitializeProvider(
const base::Closure& do_query_info_callback) {
do_query_info_callback.Run();
}
void SystemInfoProvider::StartQueryInfo(
const QueryInfoCompletionCallback& callback) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DCHECK(!callback.is_null());
callbacks_.push(callback);
if (is_waiting_for_completion_)
return;
is_waiting_for_completion_ = true;
InitializeProvider(
base::Bind(&SystemInfoProvider::StartQueryInfoPostInitialization, this));
}
void SystemInfoProvider::OnQueryCompleted(bool success) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
while (!callbacks_.empty()) {
QueryInfoCompletionCallback callback = callbacks_.front();
callback.Run(success);
callbacks_.pop();
}
is_waiting_for_completion_ = false;
}
void SystemInfoProvider::StartQueryInfoPostInitialization() {
PrepareQueryOnUIThread();
// Post the custom query info task to blocking pool for information querying
// and reply with OnQueryCompleted.
base::PostTaskAndReplyWithResult(
worker_pool_.get(),
FROM_HERE,
base::Bind(&SystemInfoProvider::QueryInfo, this),
base::Bind(&SystemInfoProvider::OnQueryCompleted, this));
}
} // namespace extensions
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