4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2009 Develer S.r.l. (http://www.develer.com/)
33 * \brief KFile interface over a FIFO buffer.
35 * \author Francesco Sacchi <asterix@develer.com>
38 #include "kfile_fifo.h"
45 static size_t kfilefifo_read(struct KFile *_fd, void *_buf, size_t size)
47 KFileFifo *fd = KFILEFIFO_CAST(_fd);
48 uint8_t *buf = (uint8_t *)_buf;
50 while (size-- && !fifo_isempty_locked(fd->fifo))
51 *buf++ = fifo_pop_locked(fd->fifo);
53 return buf - (uint8_t *)_buf;
56 static size_t kfilefifo_write(struct KFile *_fd, const void *_buf, size_t size)
58 KFileFifo *fd = KFILEFIFO_CAST(_fd);
59 const uint8_t *buf = (const uint8_t *)_buf;
61 while (size-- && !fifo_isfull_locked(fd->fifo))
62 fifo_push_locked(fd->fifo, *buf++);
64 return buf - (const uint8_t *)_buf;
67 void kfilefifo_init(KFileFifo *kf, FIFOBuffer *fifo)
69 memset(kf, 0, sizeof(*kf));
72 kf->fd.read = kfilefifo_read;
73 kf->fd.write = kfilefifo_write;
74 DB(kf->fd._type = KFT_KFILEFIFO);