Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 1 | /* |
Michele Di Giorgio | d9eaf61 | 2020-07-08 11:12:57 +0100 | [diff] [blame] | 2 | * Copyright (c) 2017-2018 Arm Limited. |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | #ifndef __ARM_COMPUTE_UTILS_SEMAMPHORE_H__ |
| 25 | #define __ARM_COMPUTE_UTILS_SEMAMPHORE_H__ |
| 26 | |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 27 | #include "support/Mutex.h" |
Felix Thomasmathibalan | afd38f0 | 2023-09-27 17:46:17 +0100 | [diff] [blame] | 28 | |
| 29 | #include "Mutex.h" |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 30 | #include <condition_variable> |
| 31 | |
| 32 | namespace arm_compute |
| 33 | { |
| 34 | #ifndef NO_MULTI_THREADING |
| 35 | /** Semamphore class */ |
| 36 | class Semaphore |
| 37 | { |
| 38 | public: |
| 39 | /** Default Constuctor |
| 40 | * |
| 41 | * @param[in] value Semaphore initial value |
| 42 | */ |
Felix Thomasmathibalan | afd38f0 | 2023-09-27 17:46:17 +0100 | [diff] [blame] | 43 | Semaphore(int value = 0) : _value(value), _m(), _cv() |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 44 | { |
| 45 | } |
| 46 | /** Signals a semaphore */ |
| 47 | inline void signal() |
| 48 | { |
Anthony Barbier | ff0bccf | 2018-11-30 10:42:40 +0000 | [diff] [blame] | 49 | { |
| 50 | std::lock_guard<std::mutex> lock(_m); |
| 51 | ++_value; |
| 52 | } |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 53 | _cv.notify_one(); |
| 54 | } |
| 55 | /** Waits on a semaphore */ |
| 56 | inline void wait() |
| 57 | { |
| 58 | std::unique_lock<std::mutex> lock(_m); |
Felix Thomasmathibalan | afd38f0 | 2023-09-27 17:46:17 +0100 | [diff] [blame] | 59 | _cv.wait(lock, [this]() { return _value > 0; }); |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 60 | --_value; |
| 61 | } |
| 62 | |
| 63 | private: |
| 64 | int _value; |
| 65 | arm_compute::Mutex _m; |
| 66 | std::condition_variable _cv; |
| 67 | }; |
| 68 | #else /* NO_MULTI_THREADING */ |
| 69 | /** Empty semamphore class */ |
| 70 | class Semaphore |
| 71 | { |
| 72 | public: |
Felix Thomasmathibalan | afd38f0 | 2023-09-27 17:46:17 +0100 | [diff] [blame] | 73 | Semaphore(int value = 0) : _value(value) |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 74 | { |
Georgios Pinitas | 421405b | 2018-10-26 19:05:32 +0100 | [diff] [blame] | 75 | (void)_value; |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 76 | } |
| 77 | /** Signals a semaphore */ |
| 78 | inline void signal() |
| 79 | { |
Georgios Pinitas | 421405b | 2018-10-26 19:05:32 +0100 | [diff] [blame] | 80 | (void)_value; |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 81 | } |
| 82 | /** Waits on a semaphore */ |
| 83 | inline void wait() |
| 84 | { |
Georgios Pinitas | 421405b | 2018-10-26 19:05:32 +0100 | [diff] [blame] | 85 | (void)_value; |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | private: |
| 89 | int _value; |
| 90 | }; |
| 91 | #endif /* NO_MULTI_THREADING */ |
Felix Thomasmathibalan | afd38f0 | 2023-09-27 17:46:17 +0100 | [diff] [blame] | 92 | } // namespace arm_compute |
Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 93 | #endif /* __ARM_COMPUTE_UTILS_SEMAMPHORE_H__ */ |