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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <assert.h>
#include <fcntl.h>
#include <unistd.h>
#include "iochannel.h"
#include "util.h"
#include "socket-util.h"
#include "xmalloc.h"
struct pa_iochannel {
int ifd, ofd;
struct pa_mainloop_api* mainloop;
void (*callback)(struct pa_iochannel*io, void *userdata);
void*userdata;
int readable;
int writable;
int hungup;
int no_close;
struct pa_io_event* input_event, *output_event;
};
static void enable_mainloop_sources(struct pa_iochannel *io) {
assert(io);
if (io->input_event == io->output_event) {
enum pa_io_event_flags f = PA_IO_EVENT_NULL;
assert(io->input_event);
if (!io->readable)
f |= PA_IO_EVENT_INPUT;
if (!io->writable)
f |= PA_IO_EVENT_OUTPUT;
io->mainloop->io_enable(io->input_event, f);
} else {
if (io->input_event)
io->mainloop->io_enable(io->input_event, io->readable ? PA_IO_EVENT_NULL : PA_IO_EVENT_INPUT);
if (io->output_event)
io->mainloop->io_enable(io->output_event, io->writable ? PA_IO_EVENT_NULL : PA_IO_EVENT_OUTPUT);
}
}
static void callback(struct pa_mainloop_api* m, struct pa_io_event *e, int fd, enum pa_io_event_flags f, void *userdata) {
struct pa_iochannel *io = userdata;
int changed = 0;
assert(m && e && fd >= 0 && userdata);
if ((f & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) && !io->hungup) {
io->hungup = 1;
changed = 1;
}
if ((f & PA_IO_EVENT_INPUT) && !io->readable) {
io->readable = 1;
changed = 1;
assert(e == io->input_event);
}
if ((f & PA_IO_EVENT_OUTPUT) && !io->writable) {
io->writable = 1;
changed = 1;
assert(e == io->output_event);
}
if (changed) {
enable_mainloop_sources(io);
if (io->callback)
io->callback(io, io->userdata);
}
}
struct pa_iochannel* pa_iochannel_new(struct pa_mainloop_api*m, int ifd, int ofd) {
struct pa_iochannel *io;
assert(m && (ifd >= 0 || ofd >= 0));
io = pa_xmalloc(sizeof(struct pa_iochannel));
io->ifd = ifd;
io->ofd = ofd;
io->mainloop = m;
io->userdata = NULL;
io->callback = NULL;
io->readable = 0;
io->writable = 0;
io->hungup = 0;
io->no_close = 0;
io->input_event = io->output_event = NULL;
if (ifd == ofd) {
assert(ifd >= 0);
pa_make_nonblock_fd(io->ifd);
io->input_event = io->output_event = m->io_new(m, ifd, PA_IO_EVENT_INPUT|PA_IO_EVENT_OUTPUT, callback, io);
} else {
if (ifd >= 0) {
pa_make_nonblock_fd(io->ifd);
io->input_event = m->io_new(m, ifd, PA_IO_EVENT_INPUT, callback, io);
}
if (ofd >= 0) {
pa_make_nonblock_fd(io->ofd);
io->output_event = m->io_new(m, ofd, PA_IO_EVENT_OUTPUT, callback, io);
}
}
return io;
}
void pa_iochannel_free(struct pa_iochannel*io) {
assert(io);
if (io->input_event)
io->mainloop->io_free(io->input_event);
if (io->output_event && (io->output_event != io->input_event))
io->mainloop->io_free(io->output_event);
if (!io->no_close) {
if (io->ifd >= 0)
close(io->ifd);
if (io->ofd >= 0 && io->ofd != io->ifd)
close(io->ofd);
}
pa_xfree(io);
}
int pa_iochannel_is_readable(struct pa_iochannel*io) {
assert(io);
return io->readable;
}
int pa_iochannel_is_writable(struct pa_iochannel*io) {
assert(io);
return io->writable;
}
int pa_iochannel_is_hungup(struct pa_iochannel*io) {
assert(io);
return io->hungup;
}
ssize_t pa_iochannel_write(struct pa_iochannel*io, const void*data, size_t l) {
ssize_t r;
assert(io);
assert(data);
assert(l);
assert(io->ofd >= 0);
assert(io && data && l && io->ofd >= 0);
if ((r = write(io->ofd, data, l)) >= 0) {
io->writable = 0;
enable_mainloop_sources(io);
}
return r;
}
ssize_t pa_iochannel_read(struct pa_iochannel*io, void*data, size_t l) {
ssize_t r;
assert(io && data && io->ifd >= 0);
if ((r = read(io->ifd, data, l)) >= 0) {
io->readable = 0;
enable_mainloop_sources(io);
}
return r;
}
void pa_iochannel_set_callback(struct pa_iochannel*io, void (*callback)(struct pa_iochannel*io, void *userdata), void *userdata) {
assert(io);
io->callback = callback;
io->userdata = userdata;
}
void pa_iochannel_set_noclose(struct pa_iochannel*io, int b) {
assert(io);
io->no_close = b;
}
void pa_iochannel_socket_peer_to_string(struct pa_iochannel*io, char*s, size_t l) {
assert(io && s && l);
pa_socket_peer_to_string(io->ifd, s, l);
}
int pa_iochannel_socket_set_rcvbuf(struct pa_iochannel *io, size_t l) {
assert(io);
return pa_socket_set_rcvbuf(io->ifd, l);
}
int pa_iochannel_socket_set_sndbuf(struct pa_iochannel *io, size_t l) {
assert(io);
return pa_socket_set_sndbuf(io->ofd, l);
}
void pa_iochannel_force_unreadable(struct pa_iochannel *io) {
assert(io);
io->readable = 0;
enable_mainloop_sources(io);
}
void pa_iochannel_force_unwritable(struct pa_iochannel *io) {
io->writable = 0;
enable_mainloop_sources(io);
}
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