Georgios Pinitas | baf174e | 2017-09-08 19:47:30 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017 ARM Limited. |
| 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 | #include "arm_compute/runtime/PoolManager.h" |
| 25 | |
| 26 | #include "arm_compute/core/Error.h" |
| 27 | #include "arm_compute/runtime/IMemoryPool.h" |
| 28 | #include "support/ToolchainSupport.h" |
| 29 | |
| 30 | #include <list> |
| 31 | |
| 32 | using namespace arm_compute; |
| 33 | |
| 34 | PoolManager::PoolManager() |
| 35 | : _free_pools(), _occupied_pools(), _sem(), _mtx() |
| 36 | { |
| 37 | } |
| 38 | |
| 39 | IMemoryPool *PoolManager::lock_pool() |
| 40 | { |
| 41 | ARM_COMPUTE_ERROR_ON_MSG(_free_pools.empty() && _occupied_pools.empty(), "Haven't setup any pools!"); |
| 42 | |
| 43 | _sem->wait(); |
| 44 | std::lock_guard<arm_compute::Mutex> lock(_mtx); |
| 45 | ARM_COMPUTE_ERROR_ON_MSG(_free_pools.empty(), "Empty pool must exist as semaphore has been signalled"); |
| 46 | _occupied_pools.splice(std::begin(_occupied_pools), _free_pools, std::begin(_free_pools)); |
| 47 | return _occupied_pools.front().get(); |
| 48 | } |
| 49 | |
| 50 | void PoolManager::unlock_pool(IMemoryPool *pool) |
| 51 | { |
| 52 | ARM_COMPUTE_ERROR_ON_MSG(_free_pools.empty() && _occupied_pools.empty(), "Haven't setup any pools!"); |
| 53 | |
| 54 | std::lock_guard<arm_compute::Mutex> lock(_mtx); |
| 55 | auto it = std::find_if(std::begin(_occupied_pools), std::end(_occupied_pools), [pool](const std::unique_ptr<IMemoryPool> &pool_it) |
| 56 | { |
| 57 | return pool_it.get() == pool; |
| 58 | }); |
| 59 | ARM_COMPUTE_ERROR_ON_MSG(it == std::end(_occupied_pools), "Pool to be unlocked couldn't be found!"); |
| 60 | _free_pools.splice(std::begin(_free_pools), _occupied_pools, it); |
| 61 | _sem->signal(); |
| 62 | } |
| 63 | |
| 64 | void PoolManager::register_pool(std::unique_ptr<IMemoryPool> pool) |
| 65 | { |
| 66 | std::lock_guard<arm_compute::Mutex> lock(_mtx); |
| 67 | ARM_COMPUTE_ERROR_ON_MSG(!_occupied_pools.empty(), "All pools should be free in order to register a new one!"); |
| 68 | |
| 69 | // Set pool |
| 70 | _free_pools.push_front(std::move(pool)); |
| 71 | |
| 72 | // Update semaphore |
| 73 | _sem = arm_compute::support::cpp14::make_unique<arm_compute::Semaphore>(_free_pools.size()); |
| 74 | } |