1 // Copyright (c) 2012 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/threading/worker_pool.h"
8 #include "base/callback.h"
9 #include "base/debug/trace_event.h"
10 #include "base/logging.h"
11 #include "base/pending_task.h"
12 #include "base/threading/thread_local.h"
13 #include "base/tracked_objects.h"
19 base::LazyInstance<ThreadLocalBoolean>::Leaky
20 g_worker_pool_running_on_this_thread = LAZY_INSTANCE_INITIALIZER;
22 DWORD CALLBACK WorkItemCallback(void* param) {
23 PendingTask* pending_task = static_cast<PendingTask*>(param);
24 TRACE_EVENT2("toplevel", "WorkItemCallback::Run",
25 "src_file", pending_task->posted_from.file_name(),
26 "src_func", pending_task->posted_from.function_name());
28 tracked_objects::ThreadData::PrepareForStartOfRun(pending_task->birth_tally);
30 g_worker_pool_running_on_this_thread.Get().Set(true);
32 tracked_objects::TaskStopwatch stopwatch;
34 pending_task->task.Run();
37 g_worker_pool_running_on_this_thread.Get().Set(false);
39 tracked_objects::ThreadData::TallyRunOnWorkerThreadIfTracking(
40 pending_task->birth_tally,
41 tracked_objects::TrackedTime(pending_task->time_posted),
48 // Takes ownership of |pending_task|
49 bool PostTaskInternal(PendingTask* pending_task, bool task_is_slow) {
52 flags |= WT_EXECUTELONGFUNCTION;
54 if (!QueueUserWorkItem(WorkItemCallback, pending_task, flags)) {
55 DPLOG(ERROR) << "QueueUserWorkItem failed";
66 bool WorkerPool::PostTask(const tracked_objects::Location& from_here,
67 const base::Closure& task, bool task_is_slow) {
68 PendingTask* pending_task = new PendingTask(from_here, task);
69 return PostTaskInternal(pending_task, task_is_slow);
73 bool WorkerPool::RunsTasksOnCurrentThread() {
74 return g_worker_pool_running_on_this_thread.Get().Get();