74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/threading/worker_pool.h"
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#include "base/bind.h"
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#include "base/callback.h"
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#include "base/debug/trace_event.h"
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#include "base/logging.h"
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#include "base/pending_task.h"
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#include "base/threading/thread_local.h"
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#include "base/tracked_objects.h"
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namespace base {
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namespace {
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base::LazyInstance<ThreadLocalBoolean>::Leaky
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g_worker_pool_running_on_this_thread = LAZY_INSTANCE_INITIALIZER;
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DWORD CALLBACK WorkItemCallback(void* param) {
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PendingTask* pending_task = static_cast<PendingTask*>(param);
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TRACE_EVENT2("task", "WorkItemCallback::Run",
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"src_file", pending_task->posted_from.file_name(),
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"src_func", pending_task->posted_from.function_name());
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tracked_objects::TrackedTime start_time =
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tracked_objects::ThreadData::NowForStartOfRun(pending_task->birth_tally);
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g_worker_pool_running_on_this_thread.Get().Set(true);
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pending_task->task.Run();
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g_worker_pool_running_on_this_thread.Get().Set(false);
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tracked_objects::ThreadData::TallyRunOnWorkerThreadIfTracking(
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pending_task->birth_tally,
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tracked_objects::TrackedTime(pending_task->time_posted), start_time,
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tracked_objects::ThreadData::NowForEndOfRun());
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delete pending_task;
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return 0;
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}
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// Takes ownership of |pending_task|
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bool PostTaskInternal(PendingTask* pending_task, bool task_is_slow) {
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ULONG flags = 0;
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if (task_is_slow)
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flags |= WT_EXECUTELONGFUNCTION;
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if (!QueueUserWorkItem(WorkItemCallback, pending_task, flags)) {
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DLOG_GETLASTERROR(ERROR) << "QueueUserWorkItem failed";
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delete pending_task;
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return false;
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}
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return true;
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}
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} // namespace
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// static
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bool WorkerPool::PostTask(const tracked_objects::Location& from_here,
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const base::Closure& task, bool task_is_slow) {
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PendingTask* pending_task = new PendingTask(from_here, task);
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return PostTaskInternal(pending_task, task_is_slow);
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}
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// static
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bool WorkerPool::RunsTasksOnCurrentThread() {
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return g_worker_pool_running_on_this_thread.Get().Get();
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}
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} // namespace base
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