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/** ********************************************************************
* @file Lock.h
* @copyright (c) 2017-2018 Richard Damon
* @author Richard Damon <richard.damon@gmail.com>
* @parblock
* MIT License:
*
* 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.
*
* It is requested (but not required by license) that any bugs found or
* improvements made be shared, preferably to the author.
* *
* @date Jun 6, 2017 Created
*
* Description:
* @brief Lock Wrapper
*
* Wrapper classes for Basic Lock Functionality for FreeRTOS.
*
* @ingroup FreeRTOSCpp
**********************************************************************/
#ifndef FREERTOS_FREERTOSPP_LOCK_H_
#define FREERTOS_FREERTOSPP_LOCK_H_
#include "FreeRTOS.h"
/**
* A Base class to provide block based locking capability.
* @ingroup FreeRTOSCpp
*/
class Lockable {
public:
Lockable() {}
virtual ~Lockable() {}
virtual bool take(TickType_t wait = portMAX_DELAY) = 0;
virtual bool give() = 0;
private:
#if __cplusplus < 201101L
Lockable(Lockable const&); ///< We are not copyable.
void operator =(Lockable const&); ///< We are not assignable.
#else
Lockable(Lockable const&) = delete; ///< We are not copyable.
void operator =(Lockable const&) = delete; ///< We are not assignable.
#endif // __cplusplus
};
/**
* Class to hold a block based lock. (auto unlocks on in its destructor)
* @ingroup FreeRTOSCpp
*/
class Lock {
public:
Lock(Lockable& mylockable, bool locked = true, TickType_t wait = portMAX_DELAY);
virtual ~Lock();
bool lock(TickType_t wait = portMAX_DELAY);
void unlock();
bool locked() const { return lockCnt > 0; }
private:
Lockable& lockable;
int lockCnt;
#if __cplusplus < 201101L
Lock(Lock const&); ///< We are not copyable.
void operator =(Lock const&); ///< We are not assignable.
#else
Lock(Lock const&) = delete; ///< We are not copyable.
void operator =(Lock const&) = delete; ///< We are not assignable.
#endif // __cplusplus
};
#endif /* FREERTOS_FREERTOSPP_LOCK_H_ */
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