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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 "ppapi/proxy/resource_reply_thread_registrar.h"
#include "base/logging.h"
#include "base/single_thread_task_runner.h"
#include "ipc/ipc_message.h"
#include "ppapi/proxy/resource_message_params.h"
#include "ppapi/shared_impl/proxy_lock.h"
#include "ppapi/shared_impl/tracked_callback.h"
namespace ppapi {
namespace proxy {
ResourceReplyThreadRegistrar::ResourceReplyThreadRegistrar(
scoped_refptr<base::SingleThreadTaskRunner> main_thread)
: main_thread_(main_thread) {
}
ResourceReplyThreadRegistrar::~ResourceReplyThreadRegistrar() {
}
void ResourceReplyThreadRegistrar::Register(
PP_Resource resource,
int32_t sequence_number,
scoped_refptr<TrackedCallback> reply_thread_hint) {
ProxyLock::AssertAcquiredDebugOnly();
// Use the main thread if |reply_thread_hint| is NULL or blocking.
if (!reply_thread_hint.get() || reply_thread_hint->is_blocking())
return;
DCHECK(reply_thread_hint->target_loop());
scoped_refptr<base::SingleThreadTaskRunner> reply_thread(
reply_thread_hint->target_loop()->GetTaskRunner());
{
base::AutoLock auto_lock(lock_);
if (reply_thread.get() == main_thread_.get())
return;
map_[resource][sequence_number] = reply_thread;
}
}
void ResourceReplyThreadRegistrar::Unregister(PP_Resource resource) {
base::AutoLock auto_lock(lock_);
map_.erase(resource);
}
scoped_refptr<base::SingleThreadTaskRunner>
ResourceReplyThreadRegistrar::GetTargetThread(
const ResourceMessageReplyParams& reply_params,
const IPC::Message& nested_msg) {
base::AutoLock auto_lock(lock_);
ResourceMap::iterator resource_iter = map_.find(reply_params.pp_resource());
if (resource_iter != map_.end()) {
SequenceThreadMap::iterator sequence_thread_iter =
resource_iter->second.find(reply_params.sequence());
if (sequence_thread_iter != resource_iter->second.end()) {
scoped_refptr<base::SingleThreadTaskRunner> target =
sequence_thread_iter->second;
resource_iter->second.erase(sequence_thread_iter);
return target;
}
}
return main_thread_;
}
} // namespace proxy
} // namespace ppapi
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