rmutex.h

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/*
 * SPDX-FileCopyrightText: 2016 Theobroma Systems Design & Consulting GmbH
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#pragma once

 
#include <stdint.h>
 
#include "mutex.h"
#include "sched.h"
 
#ifdef __cplusplus
extern "C" {
#endif

typedef struct rmutex_t {
    /* fields are managed by mutex functions, don't touch */
    mutex_t mutex;

    uint16_t refcount;

    kernel_pid_t owner;
} rmutex_t;

#define RMUTEX_INIT { MUTEX_INIT, 0, KERNEL_PID_UNDEF }

static inline void rmutex_init(rmutex_t *rmutex)
{
    rmutex_t empty_rmutex = RMUTEX_INIT;
 
    *rmutex = empty_rmutex;
}

int rmutex_trylock(rmutex_t *rmutex);

void rmutex_lock(rmutex_t *rmutex);

void rmutex_unlock(rmutex_t *rmutex);
 
#ifdef __cplusplus
}
#endif