condition.h

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/*
 * Copyright (c) 2016, Xilinx Inc. and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
 
/*
 * @file        generic/condition.h
 * @brief       Generic condition variable primitives for libmetal.
 */
 
#ifndef __METAL_CONDITION__H__
#error "Include metal/condition.h instead of metal/generic/condition.h"
#endif
 
#ifndef __METAL_GENERIC_CONDITION__H__
#define __METAL_GENERIC_CONDITION__H__
 
#include <unistd.h>
#include <metal/atomic.h>
#include <stdint.h>
#include <limits.h>
#include <errno.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct metal_condition {
        metal_mutex_t *m; 
        atomic_int v; 
};
 
#define METAL_CONDITION_INIT            { NULL, ATOMIC_VAR_INIT(0) }
 
static inline void metal_condition_init(struct metal_condition *cv)
{
        cv->m = NULL;
        atomic_init(&cv->v, 0);
}
 
static inline int metal_condition_signal(struct metal_condition *cv)
{
        if (!cv)
                return -EINVAL;
 
        atomic_fetch_add(&cv->v, 1);
        return 0;
}
 
static inline int metal_condition_broadcast(struct metal_condition *cv)
{
        return metal_condition_signal(cv);
}
 
 
#ifdef __cplusplus
}
#endif
 
#endif /* __METAL_GENERIC_CONDITION__H__ */