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// Copyright (c) 2012 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 "base/threading/worker_pool.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/debug/trace_event.h"
#include "base/logging.h"
#include "base/pending_task.h"
#include "base/threading/thread_local.h"
#include "base/tracked_objects.h"
namespace base {
namespace {
base::LazyInstance<ThreadLocalBoolean>::Leaky
g_worker_pool_running_on_this_thread = LAZY_INSTANCE_INITIALIZER;
DWORD CALLBACK WorkItemCallback(void* param) {
PendingTask* pending_task = static_cast<PendingTask*>(param);
TRACE_EVENT2("toplevel", "WorkItemCallback::Run",
"src_file", pending_task->posted_from.file_name(),
"src_func", pending_task->posted_from.function_name());
tracked_objects::TrackedTime start_time =
tracked_objects::ThreadData::NowForStartOfRun(pending_task->birth_tally);
g_worker_pool_running_on_this_thread.Get().Set(true);
pending_task->task.Run();
g_worker_pool_running_on_this_thread.Get().Set(false);
tracked_objects::ThreadData::TallyRunOnWorkerThreadIfTracking(
pending_task->birth_tally,
tracked_objects::TrackedTime(pending_task->time_posted), start_time,
tracked_objects::ThreadData::NowForEndOfRun());
delete pending_task;
return 0;
}
// Takes ownership of |pending_task|
bool PostTaskInternal(PendingTask* pending_task, bool task_is_slow) {
ULONG flags = 0;
if (task_is_slow)
flags |= WT_EXECUTELONGFUNCTION;
if (!QueueUserWorkItem(WorkItemCallback, pending_task, flags)) {
DPLOG(ERROR) << "QueueUserWorkItem failed";
delete pending_task;
return false;
}
return true;
}
} // namespace
// static
bool WorkerPool::PostTask(const tracked_objects::Location& from_here,
const base::Closure& task, bool task_is_slow) {
PendingTask* pending_task = new PendingTask(from_here, task);
return PostTaskInternal(pending_task, task_is_slow);
}
// static
bool WorkerPool::RunsTasksOnCurrentThread() {
return g_worker_pool_running_on_this_thread.Get().Get();
}
} // namespace base
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