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/*
* 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();
}
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