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/* $OpenBSD: miofile.c,v 1.8 2012/05/23 19:25:11 ratchov Exp $ */
/*
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sndio.h>
#include "conf.h"
#include "file.h"
#include "miofile.h"
#ifdef DEBUG
#include "dbg.h"
#endif
struct miofile {
struct file file;
struct mio_hdl *hdl;
};
void miofile_close(struct file *);
unsigned int miofile_read(struct file *, unsigned char *, unsigned int);
unsigned int miofile_write(struct file *, unsigned char *, unsigned int);
void miofile_start(struct file *);
void miofile_stop(struct file *);
int miofile_nfds(struct file *);
int miofile_pollfd(struct file *, struct pollfd *, int);
int miofile_revents(struct file *, struct pollfd *);
struct fileops miofile_ops = {
"mio",
sizeof(struct miofile),
miofile_close,
miofile_read,
miofile_write,
NULL, /* start */
NULL, /* stop */
miofile_nfds,
miofile_pollfd,
miofile_revents
};
/*
* open the device
*/
struct miofile *
miofile_new(struct fileops *ops, char *path, unsigned int mode)
{
struct mio_hdl *hdl;
struct miofile *f;
hdl = mio_open(path, mode, 1);
if (hdl == NULL)
return NULL;
f = (struct miofile *)file_new(ops, path, mio_nfds(hdl));
if (f == NULL)
goto bad_close;
f->hdl = hdl;
return f;
bad_close:
mio_close(hdl);
return NULL;
}
unsigned int
miofile_read(struct file *file, unsigned char *data, unsigned int count)
{
struct miofile *f = (struct miofile *)file;
unsigned int n;
n = mio_read(f->hdl, data, count);
if (n == 0) {
f->file.state &= ~FILE_ROK;
if (mio_eof(f->hdl)) {
#ifdef DEBUG
dbg_puts(f->file.name);
dbg_puts(": failed to read from device\n");
#endif
file_eof(&f->file);
} else {
#ifdef DEBUG
if (debug_level >= 4) {
file_dbg(&f->file);
dbg_puts(": reading blocked\n");
}
#endif
}
return 0;
}
return n;
}
unsigned int
miofile_write(struct file *file, unsigned char *data, unsigned int count)
{
struct miofile *f = (struct miofile *)file;
unsigned int n;
n = mio_write(f->hdl, data, count);
if (n == 0) {
f->file.state &= ~FILE_WOK;
if (mio_eof(f->hdl)) {
#ifdef DEBUG
dbg_puts(f->file.name);
dbg_puts(": failed to write on device\n");
#endif
file_hup(&f->file);
} else {
#ifdef DEBUG
if (debug_level >= 4) {
file_dbg(&f->file);
dbg_puts(": writing blocked\n");
}
#endif
}
return 0;
}
return n;
}
int
miofile_nfds(struct file *file)
{
return mio_nfds(((struct miofile *)file)->hdl);
}
int
miofile_pollfd(struct file *file, struct pollfd *pfd, int events)
{
return mio_pollfd(((struct miofile *)file)->hdl, pfd, events);
}
int
miofile_revents(struct file *file, struct pollfd *pfd)
{
return mio_revents(((struct miofile *)file)->hdl, pfd);
}
void
miofile_close(struct file *file)
{
return mio_close(((struct miofile *)file)->hdl);
}
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