pipe.h

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/*
 * Copyright (C) 2014  René Kijewski  <rene.kijewski@fu-berlin.de>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
#pragma once

 
#include <sys/types.h>
 
#include "mutex.h"
#include "ringbuffer.h"
#include "thread.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
#ifndef PIPE_BUF
#   define PIPE_BUF (128) 
#endif

typedef struct riot_pipe {
    ringbuffer_t *rb;               
    thread_t *read_blocked;         
    thread_t *write_blocked;        
    void (*free)(void *);           
    } pipe_t;

void pipe_init(pipe_t *pipe, ringbuffer_t *rb, void (*free)(void *));

ssize_t pipe_read(pipe_t *pipe, void *buf, size_t n);

ssize_t pipe_write(pipe_t *pipe, const void *buf, size_t n);

pipe_t *pipe_malloc(unsigned size);

void pipe_free(pipe_t *rp);
 
#ifdef __cplusplus
}
#endif