| /* |
| * Copyright (c) 2017-2018 ARM Limited. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| #include "arm_compute/runtime/PoolManager.h" |
| |
| #include "arm_compute/core/Error.h" |
| #include "arm_compute/runtime/IMemoryPool.h" |
| #include "support/ToolchainSupport.h" |
| |
| #include <list> |
| |
| using namespace arm_compute; |
| |
| PoolManager::PoolManager() |
| : _free_pools(), _occupied_pools(), _sem(), _mtx() |
| { |
| } |
| |
| IMemoryPool *PoolManager::lock_pool() |
| { |
| ARM_COMPUTE_ERROR_ON_MSG(_free_pools.empty() && _occupied_pools.empty(), "Haven't setup any pools!"); |
| |
| _sem->wait(); |
| std::lock_guard<arm_compute::Mutex> lock(_mtx); |
| ARM_COMPUTE_ERROR_ON_MSG(_free_pools.empty(), "Empty pool must exist as semaphore has been signalled"); |
| _occupied_pools.splice(std::begin(_occupied_pools), _free_pools, std::begin(_free_pools)); |
| return _occupied_pools.front().get(); |
| } |
| |
| void PoolManager::unlock_pool(IMemoryPool *pool) |
| { |
| ARM_COMPUTE_ERROR_ON_MSG(_free_pools.empty() && _occupied_pools.empty(), "Haven't setup any pools!"); |
| |
| std::lock_guard<arm_compute::Mutex> lock(_mtx); |
| auto it = std::find_if(std::begin(_occupied_pools), std::end(_occupied_pools), [pool](const std::unique_ptr<IMemoryPool> &pool_it) |
| { |
| return pool_it.get() == pool; |
| }); |
| ARM_COMPUTE_ERROR_ON_MSG(it == std::end(_occupied_pools), "Pool to be unlocked couldn't be found!"); |
| _free_pools.splice(std::begin(_free_pools), _occupied_pools, it); |
| _sem->signal(); |
| } |
| |
| void PoolManager::register_pool(std::unique_ptr<IMemoryPool> pool) |
| { |
| std::lock_guard<arm_compute::Mutex> lock(_mtx); |
| ARM_COMPUTE_ERROR_ON_MSG(!_occupied_pools.empty(), "All pools should be free in order to register a new one!"); |
| |
| // Set pool |
| _free_pools.push_front(std::move(pool)); |
| |
| // Update semaphore |
| _sem = arm_compute::support::cpp14::make_unique<arm_compute::Semaphore>(_free_pools.size()); |
| } |
| |
| std::unique_ptr<IMemoryPool> PoolManager::release_pool() |
| { |
| std::lock_guard<arm_compute::Mutex> lock(_mtx); |
| ARM_COMPUTE_ERROR_ON_MSG(!_occupied_pools.empty(), "All pools should be free in order to release one!"); |
| |
| if(!_free_pools.empty()) |
| { |
| std::unique_ptr<IMemoryPool> pool = std::move(_free_pools.front()); |
| ARM_COMPUTE_ERROR_ON(_free_pools.front() != nullptr); |
| _free_pools.pop_front(); |
| |
| // Update semaphore |
| _sem = arm_compute::support::cpp14::make_unique<arm_compute::Semaphore>(_free_pools.size()); |
| |
| return pool; |
| } |
| |
| return nullptr; |
| } |
| |
| void PoolManager::clear_pools() |
| { |
| std::lock_guard<arm_compute::Mutex> lock(_mtx); |
| ARM_COMPUTE_ERROR_ON_MSG(!_occupied_pools.empty(), "All pools should be free in order to clear the PoolManager!"); |
| _free_pools.clear(); |
| |
| // Update semaphore |
| _sem = nullptr; |
| } |
| |
| size_t PoolManager::num_pools() const |
| { |
| std::lock_guard<arm_compute::Mutex> lock(_mtx); |
| |
| return _free_pools.size() + _occupied_pools.size(); |
| } |