rt-thread/components/cplusplus/Semaphore.h

43 lines
1007 B
C
Raw Normal View History

/*
2021-03-08 18:19:04 +08:00
* Copyright (c) 2006-2021, RT-Thread Development Team
*
2018-10-14 19:28:18 +08:00
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2016/10/1 Bernard The first version
*/
#pragma once
#include <stdint.h>
#include <rtthread.h>
namespace rtthread {
/** The Semaphore class is used to manage and protect access to a set of shared resources. */
class Semaphore
{
public:
/** Create and Initialize a Semaphore object used for managing resources.
@param number of available resources; maximum index value is (count-1).
*/
Semaphore(const char *name = "sem", int32_t count = 0);
~Semaphore();
/** Wait until a Semaphore resource becomes available.
@param millisec timeout value or 0 in case of no time-out.
@return true on success.
*/
bool wait(int32_t millisec = -1);
/** Release a Semaphore resource that was obtain with Semaphore::wait.
*/
void release(void);
private:
struct rt_semaphore mID;
};
}