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76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2009 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief KFile interface over a FIFO buffer.
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*
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* \author Francesco Sacchi <asterix@develer.com>
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*/
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#include "kfile_fifo.h"
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#include "fifobuf.h"
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#include <io/kfile.h>
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#include <string.h>
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static size_t kfilefifo_read(struct KFile *_fd, void *_buf, size_t size)
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{
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KFileFifo *fd = KFILEFIFO_CAST(_fd);
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uint8_t *buf = (uint8_t *)_buf;
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while (size-- && !fifo_isempty_locked(fd->fifo))
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*buf++ = fifo_pop_locked(fd->fifo);
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return buf - (uint8_t *)_buf;
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}
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static size_t kfilefifo_write(struct KFile *_fd, const void *_buf, size_t size)
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{
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KFileFifo *fd = KFILEFIFO_CAST(_fd);
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const uint8_t *buf = (const uint8_t *)_buf;
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while (size-- && !fifo_isfull_locked(fd->fifo))
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fifo_push_locked(fd->fifo, *buf++);
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return buf - (const uint8_t *)_buf;
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}
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void kfilefifo_init(KFileFifo *kf, FIFOBuffer *fifo)
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{
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memset(kf, 0, sizeof(*kf));
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kf->fifo = fifo;
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kf->fd.read = kfilefifo_read;
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kf->fd.write = kfilefifo_write;
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DB(kf->fd._type = KFT_KFILEFIFO);
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}
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