81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
|
// 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/mac/libdispatch_task_runner.h"
|
||
|
|
|
||
|
|
#include "base/callback.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
namespace mac {
|
||
|
|
|
||
|
|
LibDispatchTaskRunner::LibDispatchTaskRunner(const char* name)
|
||
|
|
: queue_(dispatch_queue_create(name, NULL)),
|
||
|
|
queue_finalized_(false, false) {
|
||
|
|
dispatch_set_context(queue_, this);
|
||
|
|
dispatch_set_finalizer_f(queue_, &LibDispatchTaskRunner::Finalizer);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool LibDispatchTaskRunner::PostDelayedTask(
|
||
|
|
const tracked_objects::Location& from_here,
|
||
|
|
const Closure& task,
|
||
|
|
base::TimeDelta delay) {
|
||
|
|
if (!queue_)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
// The block runtime would implicitly copy the reference, not the object
|
||
|
|
// it's referencing. Copy the closure into block storage so it's available
|
||
|
|
// to run.
|
||
|
|
__block const Closure task_copy = task;
|
||
|
|
void(^run_task)(void) = ^{
|
||
|
|
task_copy.Run();
|
||
|
|
};
|
||
|
|
|
||
|
|
int64 delay_nano =
|
||
|
|
delay.InMicroseconds() * base::Time::kNanosecondsPerMicrosecond;
|
||
|
|
if (delay_nano > 0) {
|
||
|
|
dispatch_time_t time = dispatch_time(DISPATCH_TIME_NOW, delay_nano);
|
||
|
|
dispatch_after(time, queue_, run_task);
|
||
|
|
} else {
|
||
|
|
dispatch_async(queue_, run_task);
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool LibDispatchTaskRunner::RunsTasksOnCurrentThread() const {
|
||
|
|
return queue_ == dispatch_get_current_queue();
|
||
|
|
}
|
||
|
|
|
||
|
|
bool LibDispatchTaskRunner::PostNonNestableDelayedTask(
|
||
|
|
const tracked_objects::Location& from_here,
|
||
|
|
const Closure& task,
|
||
|
|
base::TimeDelta delay) {
|
||
|
|
return PostDelayedTask(from_here, task, delay);
|
||
|
|
}
|
||
|
|
|
||
|
|
void LibDispatchTaskRunner::Shutdown() {
|
||
|
|
dispatch_release(queue_);
|
||
|
|
queue_ = NULL;
|
||
|
|
queue_finalized_.Wait();
|
||
|
|
}
|
||
|
|
|
||
|
|
dispatch_queue_t LibDispatchTaskRunner::GetDispatchQueue() const {
|
||
|
|
return queue_;
|
||
|
|
}
|
||
|
|
|
||
|
|
LibDispatchTaskRunner::~LibDispatchTaskRunner() {
|
||
|
|
if (queue_) {
|
||
|
|
dispatch_set_context(queue_, NULL);
|
||
|
|
dispatch_set_finalizer_f(queue_, NULL);
|
||
|
|
dispatch_release(queue_);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void LibDispatchTaskRunner::Finalizer(void* context) {
|
||
|
|
LibDispatchTaskRunner* self = static_cast<LibDispatchTaskRunner*>(context);
|
||
|
|
self->queue_finalized_.Signal();
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace mac
|
||
|
|
} // namespace base
|