2 * Copyright (c) 2017 ARM Limited.
4 * SPDX-License-Identifier: MIT
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24 #ifndef __ARM_COMPUTE_UTILS_SEMAMPHORE_H__
25 #define __ARM_COMPUTE_UTILS_SEMAMPHORE_H__
28 #include "support/Mutex.h"
29 #include <condition_variable>
33 #ifndef NO_MULTI_THREADING
34 /** Semamphore class */
38 /** Default Constuctor
40 * @param[in] value Semaphore initial value
42 Semaphore(int value = 0)
43 : _value(value), _m(), _cv()
46 /** Signals a semaphore */
49 std::unique_lock<std::mutex> lock(_m);
53 /** Waits on a semaphore */
56 std::unique_lock<std::mutex> lock(_m);
57 _cv.wait(lock, [this]()
66 arm_compute::Mutex _m;
67 std::condition_variable _cv;
69 #else /* NO_MULTI_THREADING */
70 /** Empty semamphore class */
74 Semaphore(int value = 0)
78 /** Signals a semaphore */
82 /** Waits on a semaphore */
90 #endif /* NO_MULTI_THREADING */
92 #endif /* __ARM_COMPUTE_UTILS_SEMAMPHORE_H__ */