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/***
This file is part of PulseAudio.
Copyright 2006 Lennart Poettering
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
PulseAudio 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <errno.h>
#include <pulsecore/thread.h>
#include <pulsecore/semaphore.h>
#include <pulsecore/macro.h>
#include <pulse/mainloop-api.h>
#include "thread-mq.h"
PA_STATIC_TLS_DECLARE_NO_FREE(thread_mq);
static void asyncmsgq_read_cb(pa_mainloop_api *api, pa_io_event *e, int fd, pa_io_event_flags_t events, void *userdata) {
pa_thread_mq *q = userdata;
pa_asyncmsgq *aq;
pa_assert(events == PA_IO_EVENT_INPUT);
if (pa_asyncmsgq_read_fd(q->outq) == fd)
pa_asyncmsgq_ref(aq = q->outq);
else if (pa_asyncmsgq_read_fd(q->inq) == fd)
pa_asyncmsgq_ref(aq = q->inq);
else
pa_assert_not_reached();
pa_asyncmsgq_read_after_poll(aq);
for (;;) {
pa_msgobject *object;
int code;
void *data;
int64_t offset;
pa_memchunk chunk;
/* Check whether there is a message for us to process */
while (pa_asyncmsgq_get(aq, &object, &code, &data, &offset, &chunk, 0) >= 0) {
int ret;
if (!object && code == PA_MESSAGE_SHUTDOWN) {
pa_asyncmsgq_done(aq, 0);
api->quit(api, 0);
break;
}
ret = pa_asyncmsgq_dispatch(object, code, data, offset, &chunk);
pa_asyncmsgq_done(aq, ret);
}
if (pa_asyncmsgq_read_before_poll(aq) == 0)
break;
}
pa_asyncmsgq_unref(aq);
}
static void asyncmsgq_write_inq_cb(pa_mainloop_api *api, pa_io_event *e, int fd, pa_io_event_flags_t events, void *userdata) {
pa_thread_mq *q = userdata;
pa_assert(pa_asyncmsgq_write_fd(q->inq) == fd);
pa_assert(events == PA_IO_EVENT_INPUT);
pa_asyncmsgq_write_after_poll(q->inq);
pa_asyncmsgq_write_before_poll(q->inq);
}
static void asyncmsgq_write_outq_cb(pa_mainloop_api *api, pa_io_event *e, int fd, pa_io_event_flags_t events, void *userdata) {
pa_thread_mq *q = userdata;
pa_assert(pa_asyncmsgq_write_fd(q->outq) == fd);
pa_assert(events == PA_IO_EVENT_INPUT);
pa_asyncmsgq_write_after_poll(q->outq);
pa_asyncmsgq_write_before_poll(q->outq);
}
void pa_thread_mq_init_thread_mainloop(pa_thread_mq *q, pa_mainloop_api *main_mainloop, pa_mainloop_api *thread_mainloop) {
pa_assert(q);
pa_assert(main_mainloop);
pa_assert(thread_mainloop);
pa_assert_se(q->inq = pa_asyncmsgq_new(0));
pa_assert_se(q->outq = pa_asyncmsgq_new(0));
q->main_mainloop = main_mainloop;
q->thread_mainloop = thread_mainloop;
pa_assert_se(pa_asyncmsgq_read_before_poll(q->outq) == 0);
pa_asyncmsgq_write_before_poll(q->outq);
pa_assert_se(q->read_main_event = main_mainloop->io_new(main_mainloop, pa_asyncmsgq_read_fd(q->outq), PA_IO_EVENT_INPUT, asyncmsgq_read_cb, q));
pa_assert_se(q->write_thread_event = main_mainloop->io_new(thread_mainloop, pa_asyncmsgq_write_fd(q->outq), PA_IO_EVENT_INPUT, asyncmsgq_write_outq_cb, q));
pa_asyncmsgq_read_before_poll(q->inq);
pa_asyncmsgq_write_before_poll(q->inq);
pa_assert_se(q->read_thread_event = thread_mainloop->io_new(thread_mainloop, pa_asyncmsgq_read_fd(q->inq), PA_IO_EVENT_INPUT, asyncmsgq_read_cb, q));
pa_assert_se(q->write_main_event = main_mainloop->io_new(main_mainloop, pa_asyncmsgq_write_fd(q->inq), PA_IO_EVENT_INPUT, asyncmsgq_write_inq_cb, q));
}
void pa_thread_mq_init(pa_thread_mq *q, pa_mainloop_api *mainloop, pa_rtpoll *rtpoll) {
pa_assert(q);
pa_assert(mainloop);
q->main_mainloop = mainloop;
q->thread_mainloop = NULL;
pa_assert_se(q->inq = pa_asyncmsgq_new(0));
pa_assert_se(q->outq = pa_asyncmsgq_new(0));
pa_assert_se(pa_asyncmsgq_read_before_poll(q->outq) == 0);
pa_assert_se(q->read_main_event = mainloop->io_new(mainloop, pa_asyncmsgq_read_fd(q->outq), PA_IO_EVENT_INPUT, asyncmsgq_read_cb, q));
pa_asyncmsgq_write_before_poll(q->inq);
pa_assert_se(q->write_main_event = mainloop->io_new(mainloop, pa_asyncmsgq_write_fd(q->inq), PA_IO_EVENT_INPUT, asyncmsgq_write_inq_cb, q));
pa_rtpoll_item_new_asyncmsgq_read(rtpoll, PA_RTPOLL_EARLY, q->inq);
pa_rtpoll_item_new_asyncmsgq_write(rtpoll, PA_RTPOLL_LATE, q->outq);
}
void pa_thread_mq_done(pa_thread_mq *q) {
pa_assert(q);
/* Since we are called from main context we can be sure that the
* inq is empty. However, the outq might still contain messages
* for the main loop, which we need to dispatch (e.g. release
* msgs, other stuff). Hence do so if we aren't currently
* dispatching anyway. */
if (!pa_asyncmsgq_dispatching(q->outq))
pa_asyncmsgq_flush(q->outq, true);
q->main_mainloop->io_free(q->read_main_event);
q->main_mainloop->io_free(q->write_main_event);
q->read_main_event = q->write_main_event = NULL;
if (q->thread_mainloop) {
q->thread_mainloop->io_free(q->read_thread_event);
q->thread_mainloop->io_free(q->write_thread_event);
q->read_thread_event = q->write_thread_event = NULL;
}
pa_asyncmsgq_unref(q->inq);
pa_asyncmsgq_unref(q->outq);
q->inq = q->outq = NULL;
q->main_mainloop = NULL;
q->thread_mainloop = NULL;
}
void pa_thread_mq_install(pa_thread_mq *q) {
pa_assert(q);
pa_assert(!(PA_STATIC_TLS_GET(thread_mq)));
PA_STATIC_TLS_SET(thread_mq, q);
}
pa_thread_mq *pa_thread_mq_get(void) {
return PA_STATIC_TLS_GET(thread_mq);
}
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