isrpipe.h

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/*
 * SPDX-FileCopyrightText: 2016 Kaspar Schleiser <kaspar@schleiser.de>
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#pragma once

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

typedef struct {
    tsrb_t tsrb;        
    mutex_t mutex;      
} isrpipe_t;

#define ISRPIPE_INIT(buf) { .mutex = MUTEX_INIT_LOCKED, \
                            .tsrb = TSRB_INIT(buf) }

void isrpipe_init(isrpipe_t *isrpipe, uint8_t *buf, size_t bufsize);

int isrpipe_write_one(isrpipe_t *isrpipe, uint8_t c);

int isrpipe_write(isrpipe_t *isrpipe, const uint8_t *buf, size_t n);

int isrpipe_read(isrpipe_t *isrpipe, uint8_t *buf, size_t count);

uint8_t isrpipe_read_one(isrpipe_t *isrpipe);

static inline void isrpipe_clear(isrpipe_t *isrpipe)
{
    tsrb_clear(&isrpipe->tsrb);
}

static inline unsigned int isrpipe_available(isrpipe_t *isrpipe)
{
    return tsrb_avail(&isrpipe->tsrb);
}

static inline unsigned int isrpipe_get_free(isrpipe_t *isrpipe)
{
    return tsrb_free(&isrpipe->tsrb);
}
 
#ifdef __cplusplus
}
#endif