/***

* ==++==

*

* Copyright (c) Microsoft Corporation. All rights reserved.

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*

* ==--==

* =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+

*

* Apple-specific pplx implementations

*

* =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

****/

#include <errno.h>

#include <sys/time.h>

#include <pthread.h>

#include <dispatch/dispatch.h>

#include <libkern/OSAtomic.h>

#include "stdafx.h"

#include "pplx/pplx.h"

// DEVNOTE:

// The use of mutexes is suboptimal for synchronization of task execution.

// Given that scheduler implementations should use GCD queues, there are potentially better mechanisms available to coordinate tasks (such as dispatch groups).

namespace pplx

{

namespace details {

namespace platform

{

_PPLXIMP long GetCurrentThreadId()

{

pthread_t threadId = pthread_self();

return (long)threadId;

}

void YieldExecution()

{

sleep(0);

}

} // namespace platform

void apple_scheduler::schedule( TaskProc_t proc, void* param)

{

dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);

dispatch_async_f(queue, param, proc);

}

} // namespace details

} // pplx