Return to miofile.c CVS log

Up to [local] / src / usr.bin / sndiod

When opening a device, loop over the alternate devices list in the
worker process instead of the helper process. It is simpler this way
and allows the worker to properly log which device is being used.

/*	$OpenBSD: miofile.c,v 1.6 2020/01/23 05:40:09 ratchov Exp $	*/
/*
 * Copyright (c) 2008-2012 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 "defs.h"
#include "fdpass.h"
#include "file.h"
#include "midi.h"
#include "miofile.h"
#include "utils.h"

int  port_mio_pollfd(void *, struct pollfd *);
int  port_mio_revents(void *, struct pollfd *);
void port_mio_in(void *);
void port_mio_out(void *);
void port_mio_hup(void *);

struct fileops port_mio_ops = {
	"mio",
	port_mio_pollfd,
	port_mio_revents,
	port_mio_in,
	port_mio_out,
	port_mio_hup
};

/*
 * open the port using one of the provided paths
 */
static struct mio_hdl *
port_mio_openlist(struct port *c, unsigned int mode)
{
	struct mio_hdl *hdl;
	struct name *n;
	int idx;

	idx = 0;
	n = c->path_list;
	while (1) {
		if (n == NULL)
			break;
		hdl = fdpass_mio_open(c->num, idx, mode);
		if (hdl != NULL) {
			if (log_level >= 2) {
				port_log(c);
				log_puts(": using ");
				log_puts(n->str);
				log_puts("\n");
			}
			return hdl;
		}
		n = n->next;
		idx++;
	}
	return NULL;
}

int
port_mio_open(struct port *p)
{
	p->mio.hdl = port_mio_openlist(p, p->midi->mode);
	if (p->mio.hdl == NULL)
		return 0;
	p->mio.file = file_new(&port_mio_ops, p, "port", mio_nfds(p->mio.hdl));
	return 1;
}

/*
 * Open an alternate port. Upon success, close the old port
 * and continue using the new one.
 */
int
port_mio_reopen(struct port *p)
{
	struct mio_hdl *hdl;

	hdl = port_mio_openlist(p, p->midi->mode);
	if (hdl == NULL) {
		if (log_level >= 1) {
			port_log(p);
			log_puts(": couldn't open an alternate port\n");
		}
		return 0;
	}

	/* close unused device */
	file_del(p->mio.file);
	mio_close(p->mio.hdl);

	p->mio.hdl = hdl;
	p->mio.file = file_new(&port_mio_ops, p, "port", mio_nfds(hdl));
	return 1;
}

void
port_mio_close(struct port *p)
{
	file_del(p->mio.file);
	mio_close(p->mio.hdl);
}

int
port_mio_pollfd(void *addr, struct pollfd *pfd)
{
	struct port *p = addr;
	struct midi *ep = p->midi;
	int events = 0;

	if (ep->mode & MODE_MIDIIN)
		events |= POLLIN;
	if ((ep->mode & MODE_MIDIOUT) && ep->obuf.used > 0)
		events |= POLLOUT;
	return mio_pollfd(p->mio.hdl, pfd, events);
}

int
port_mio_revents(void *addr, struct pollfd *pfd)
{
	struct port *p = addr;

	return mio_revents(p->mio.hdl, pfd);
}

void
port_mio_in(void *arg)
{
	unsigned char data[MIDI_BUFSZ];
	struct port *p = arg;
	struct midi *ep = p->midi;
	int n;

	for (;;) {
		n = mio_read(p->mio.hdl, data, MIDI_BUFSZ);
		if (n == 0)
			break;
		midi_in(ep, data, n);
	}
}

void
port_mio_out(void *arg)
{
	struct port *p = arg;
	struct midi *ep = p->midi;
	unsigned char *data;
	int n, count;

	for (;;) {
		data = abuf_rgetblk(&ep->obuf, &count);
		if (count == 0)
			break;
		n = mio_write(p->mio.hdl, data, count);
		if (n == 0)
			break;
		abuf_rdiscard(&ep->obuf, n);
		if (n < count)
			break;
	}
	if (p->state == PORT_DRAIN && ep->obuf.used == 0)
		port_close(p);
	midi_fill(ep);
}

void
port_mio_hup(void *arg)
{
	struct port *p = arg;

	if (!port_reopen(p))
		port_close(p);
}