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/*
* Copyright (c) 2017-2019 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.
*/
#ifndef ARM_COMPUTE_SCHEDULER_H
#define ARM_COMPUTE_SCHEDULER_H
#include "arm_compute/runtime/IScheduler.h"
#include <map>
#include <memory>
namespace arm_compute
{
/** Configurable scheduler which supports multiple multithreading APIs and choosing between different schedulers at runtime. */
class Scheduler
{
public:
/** Scheduler type */
enum class Type
{
ST, /**< Single thread. */
CPP, /**< C++11 threads. */
OMP, /**< OpenMP. */
CUSTOM /**< Provided by the user. */
};
/** Sets the user defined scheduler and makes it the active scheduler.
*
* @param[in] scheduler A shared pointer to a custom scheduler implemented by the user.
*/
static void set(std::shared_ptr<IScheduler> scheduler);
/** Access the scheduler singleton.
*
* @return A reference to the scheduler object.
*/
static IScheduler &get();
/** Set the active scheduler.
*
* Only one scheduler can be enabled at any time.
*
* @param[in] t the type of the scheduler to be enabled.
*/
static void set(Type t);
/** Returns the type of the active scheduler.
*
* @return The current scheduler's type.
*/
static Type get_type();
/** Returns true if the given scheduler type is supported. False otherwise.
*
* @param[in] t the type of the scheduler to check.
*
* @return true if the given scheduler type is supported. False otherwise.
*/
static bool is_available(Type t);
private:
static Type _scheduler_type;
static std::shared_ptr<IScheduler> _custom_scheduler;
static std::map<Type, std::unique_ptr<IScheduler>> _schedulers;
Scheduler();
};
} // namespace arm_compute
#endif /* ARM_COMPUTE_SCHEDULER_H */
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