4 * This file is part of BeRTOS.
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14 * GNU General Public License for more details.
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18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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21 * library without restriction. Specifically, if other files instantiate
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29 * Copyright 2009 Develer S.r.l. (http://www.develer.com/)
33 * \brief KFile interface over a FIFO buffer.
35 * \version $Id: cfg_adc.h 2348 2009-02-16 13:43:44Z duplo $
36 * \author Francesco Sacchi <asterix@develer.com>
39 #include "kfile_fifo.h"
42 #include <kern/kfile.h>
46 static size_t kfilefifo_read(struct KFile *_fd, void *_buf, size_t size)
48 KFileFifo *fd = KFILEFIFO_CAST(_fd);
49 uint8_t *buf = (uint8_t *)_buf;
51 while (size-- && !fifo_isempty_locked(fd->fifo))
52 *buf++ = fifo_pop_locked(fd->fifo);
54 return buf - (uint8_t *)_buf;
57 static size_t kfilefifo_write(struct KFile *_fd, const void *_buf, size_t size)
59 KFileFifo *fd = KFILEFIFO_CAST(_fd);
60 const uint8_t *buf = (const uint8_t *)_buf;
62 while (size-- && !fifo_isfull_locked(fd->fifo))
63 fifo_push_locked(fd->fifo, *buf++);
65 return buf - (const uint8_t *)_buf;
68 void kfilefifo_init(KFileFifo *kf, FIFOBuffer *fifo)
70 memset(kf, 0, sizeof(*kf));
73 kf->fd.read = kfilefifo_read;
74 kf->fd.write = kfilefifo_write;
75 DB(kf->fd._type = KFT_KFILEFIFO);