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/* $Id$ */
/***
This file is part of PulseAudio.
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 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
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; 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 <assert.h>
#include <pulse/xmalloc.h>
#include <pulse/timeval.h>
#include <pulsecore/idxset.h>
#include <pulsecore/core-util.h>
#include <pulsecore/log.h>
#include <pulsecore/llist.h>
#include <glib.h>
#include "glib-mainloop.h"
struct pa_io_event {
pa_glib_mainloop *mainloop;
int dead;
GPollFD poll_fd;
int poll_fd_added;
pa_io_event_cb_t callback;
void *userdata;
pa_io_event_destroy_cb_t destroy_callback;
PA_LLIST_FIELDS(pa_io_event);
};
struct pa_time_event {
pa_glib_mainloop *mainloop;
int dead;
int enabled;
struct timeval timeval;
pa_time_event_cb_t callback;
void *userdata;
pa_time_event_destroy_cb_t destroy_callback;
PA_LLIST_FIELDS(pa_time_event);
};
struct pa_defer_event {
pa_glib_mainloop *mainloop;
int dead;
int enabled;
pa_defer_event_cb_t callback;
void *userdata;
pa_defer_event_destroy_cb_t destroy_callback;
PA_LLIST_FIELDS(pa_defer_event);
};
struct pa_glib_mainloop {
GSource source;
pa_mainloop_api api;
GMainContext *context;
PA_LLIST_HEAD(pa_io_event, io_events);
PA_LLIST_HEAD(pa_time_event, time_events);
PA_LLIST_HEAD(pa_defer_event, defer_events);
int n_enabled_defer_events, n_enabled_time_events;
int io_events_please_scan, time_events_please_scan, defer_events_please_scan;
pa_time_event *cached_next_time_event;
};
static void cleanup_io_events(pa_glib_mainloop *g, int force) {
pa_io_event *e;
e = g->io_events;
while (e) {
pa_io_event *n = e->next;
if (!force && g->io_events_please_scan <= 0)
break;
if (force || e->dead) {
PA_LLIST_REMOVE(pa_io_event, g->io_events, e);
if (e->dead) {
g_assert(g->io_events_please_scan > 0);
g->io_events_please_scan--;
}
if (e->poll_fd_added)
g_source_remove_poll(&g->source, &e->poll_fd);
if (e->destroy_callback)
e->destroy_callback(&g->api, e, e->userdata);
pa_xfree(e);
}
e = n;
}
g_assert(g->io_events_please_scan == 0);
}
static void cleanup_time_events(pa_glib_mainloop *g, int force) {
pa_time_event *e;
e = g->time_events;
while (e) {
pa_time_event *n = e->next;
if (!force && g->time_events_please_scan <= 0)
break;
if (force || e->dead) {
PA_LLIST_REMOVE(pa_time_event, g->time_events, e);
if (e->dead) {
g_assert(g->time_events_please_scan > 0);
g->time_events_please_scan--;
}
if (!e->dead && e->enabled) {
g_assert(g->n_enabled_time_events > 0);
g->n_enabled_time_events--;
}
if (e->destroy_callback)
e->destroy_callback(&g->api, e, e->userdata);
pa_xfree(e);
}
e = n;
}
g_assert(g->time_events_please_scan == 0);
}
static void cleanup_defer_events(pa_glib_mainloop *g, int force) {
pa_defer_event *e;
e = g->defer_events;
while (e) {
pa_defer_event *n = e->next;
if (!force && g->defer_events_please_scan <= 0)
break;
if (force || e->dead) {
PA_LLIST_REMOVE(pa_defer_event, g->defer_events, e);
if (e->dead) {
g_assert(g->defer_events_please_scan > 0);
g->defer_events_please_scan--;
}
if (!e->dead && e->enabled) {
g_assert(g->n_enabled_defer_events > 0);
g->n_enabled_defer_events--;
}
if (e->destroy_callback)
e->destroy_callback(&g->api, e, e->userdata);
pa_xfree(e);
}
e = n;
}
g_assert(g->defer_events_please_scan == 0);
}
static gushort map_flags_to_glib(pa_io_event_flags_t flags) {
return
(flags & PA_IO_EVENT_INPUT ? G_IO_IN : 0) |
(flags & PA_IO_EVENT_OUTPUT ? G_IO_OUT : 0) |
(flags & PA_IO_EVENT_ERROR ? G_IO_ERR : 0) |
(flags & PA_IO_EVENT_HANGUP ? G_IO_HUP : 0);
}
static pa_io_event_flags_t map_flags_from_glib(gushort flags) {
return
(flags & G_IO_IN ? PA_IO_EVENT_INPUT : 0) |
(flags & G_IO_OUT ? PA_IO_EVENT_OUTPUT : 0) |
(flags & G_IO_ERR ? PA_IO_EVENT_ERROR : 0) |
(flags & G_IO_HUP ? PA_IO_EVENT_HANGUP : 0);
}
static pa_io_event* glib_io_new(
pa_mainloop_api*m,
int fd,
pa_io_event_flags_t f,
pa_io_event_cb_t cb,
void *userdata) {
pa_io_event *e;
pa_glib_mainloop *g;
g_assert(m);
g_assert(m->userdata);
g_assert(fd >= 0);
g_assert(cb);
g = m->userdata;
e = pa_xnew(pa_io_event, 1);
e->mainloop = g;
e->dead = 0;
e->poll_fd.fd = fd;
e->poll_fd.events = map_flags_to_glib(f);
e->poll_fd.revents = 0;
e->callback = cb;
e->userdata = userdata;
e->destroy_callback = NULL;
PA_LLIST_PREPEND(pa_io_event, g->io_events, e);
g_source_add_poll(&g->source, &e->poll_fd);
e->poll_fd_added = 1;
return e;
}
static void glib_io_enable(pa_io_event*e, pa_io_event_flags_t f) {
g_assert(e);
g_assert(!e->dead);
e->poll_fd.events = map_flags_to_glib(f);
}
static void glib_io_free(pa_io_event*e) {
g_assert(e);
g_assert(!e->dead);
e->dead = 1;
e->mainloop->io_events_please_scan++;
if (e->poll_fd_added) {
g_source_remove_poll(&e->mainloop->source, &e->poll_fd);
e->poll_fd_added = 0;
}
}
static void glib_io_set_destroy(pa_io_event*e, pa_io_event_destroy_cb_t cb) {
g_assert(e);
g_assert(!e->dead);
e->destroy_callback = cb;
}
/* Time sources */
static pa_time_event* glib_time_new(
pa_mainloop_api*m,
const struct timeval *tv,
pa_time_event_cb_t cb,
void *userdata) {
pa_glib_mainloop *g;
pa_time_event *e;
g_assert(m);
g_assert(m->userdata);
g_assert(cb);
g = m->userdata;
e = pa_xnew(pa_time_event, 1);
e->mainloop = g;
e->dead = 0;
if ((e->enabled = !!tv)) {
e->timeval = *tv;
g->n_enabled_time_events++;
if (g->cached_next_time_event) {
g_assert(g->cached_next_time_event->enabled);
if (pa_timeval_cmp(tv, &g->cached_next_time_event->timeval) < 0)
g->cached_next_time_event = e;
}
}
e->callback = cb;
e->userdata = userdata;
e->destroy_callback = NULL;
PA_LLIST_PREPEND(pa_time_event, g->time_events, e);
return e;
}
static void glib_time_restart(pa_time_event*e, const struct timeval *tv) {
g_assert(e);
g_assert(!e->dead);
if (e->enabled && !tv) {
g_assert(e->mainloop->n_enabled_time_events > 0);
e->mainloop->n_enabled_time_events--;
} else if (!e->enabled && tv)
e->mainloop->n_enabled_time_events++;
if ((e->enabled = !!tv))
e->timeval = *tv;
if (e->mainloop->cached_next_time_event && e->enabled) {
g_assert(e->mainloop->cached_next_time_event->enabled);
if (pa_timeval_cmp(tv, &e->mainloop->cached_next_time_event->timeval) < 0)
e->mainloop->cached_next_time_event = e;
} else if (e->mainloop->cached_next_time_event == e)
e->mainloop->cached_next_time_event = NULL;
}
static void glib_time_free(pa_time_event *e) {
g_assert(e);
g_assert(!e->dead);
e->dead = 1;
e->mainloop->time_events_please_scan++;
if (e->enabled)
e->mainloop->n_enabled_time_events--;
if (e->mainloop->cached_next_time_event == e)
e->mainloop->cached_next_time_event = NULL;
}
static void glib_time_set_destroy(pa_time_event *e, pa_time_event_destroy_cb_t cb) {
g_assert(e);
g_assert(!e->dead);
e->destroy_callback = cb;
}
/* Deferred sources */
static pa_defer_event* glib_defer_new(
pa_mainloop_api*m,
pa_defer_event_cb_t cb,
void *userdata) {
pa_defer_event *e;
pa_glib_mainloop *g;
g_assert(m);
g_assert(m->userdata);
g_assert(cb);
g = m->userdata;
e = pa_xnew(pa_defer_event, 1);
e->mainloop = g;
e->dead = 0;
e->enabled = 1;
g->n_enabled_defer_events++;
e->callback = cb;
e->userdata = userdata;
e->destroy_callback = NULL;
PA_LLIST_PREPEND(pa_defer_event, g->defer_events, e);
return e;
}
static void glib_defer_enable(pa_defer_event *e, int b) {
g_assert(e);
g_assert(!e->dead);
if (e->enabled && !b) {
g_assert(e->mainloop->n_enabled_defer_events > 0);
e->mainloop->n_enabled_defer_events--;
} else if (!e->enabled && b)
e->mainloop->n_enabled_defer_events++;
e->enabled = b;
}
static void glib_defer_free(pa_defer_event *e) {
g_assert(e);
g_assert(!e->dead);
e->dead = 1;
e->mainloop->defer_events_please_scan++;
if (e->enabled) {
g_assert(e->mainloop->n_enabled_defer_events > 0);
e->mainloop->n_enabled_defer_events--;
}
}
static void glib_defer_set_destroy(pa_defer_event *e, pa_defer_event_destroy_cb_t cb) {
g_assert(e);
g_assert(!e->dead);
e->destroy_callback = cb;
}
/* quit() */
static void glib_quit(pa_mainloop_api*a, PA_GCC_UNUSED int retval) {
g_warning("quit() ignored");
/* NOOP */
}
static pa_time_event* find_next_time_event(pa_glib_mainloop *g) {
pa_time_event *t, *n = NULL;
g_assert(g);
if (g->cached_next_time_event)
return g->cached_next_time_event;
for (t = g->time_events; t; t = t->next) {
if (t->dead || !t->enabled)
continue;
if (!n || pa_timeval_cmp(&t->timeval, &n->timeval) < 0) {
n = t;
/* Shortcut for tv = { 0, 0 } */
if (n->timeval.tv_sec <= 0)
break;
}
}
g->cached_next_time_event = n;
return n;
}
static void scan_dead(pa_glib_mainloop *g) {
g_assert(g);
if (g->io_events_please_scan)
cleanup_io_events(g, 0);
if (g->time_events_please_scan)
cleanup_time_events(g, 0);
if (g->defer_events_please_scan)
cleanup_defer_events(g, 0);
}
static gboolean prepare_func(GSource *source, gint *timeout) {
pa_glib_mainloop *g = (pa_glib_mainloop*) source;
g_assert(g);
g_assert(timeout);
scan_dead(g);
if (g->n_enabled_defer_events) {
*timeout = 0;
return TRUE;
} else if (g->n_enabled_time_events) {
pa_time_event *t;
GTimeVal now;
struct timeval tvnow;
pa_usec_t usec;
t = find_next_time_event(g);
g_assert(t);
g_source_get_current_time(source, &now);
tvnow.tv_sec = now.tv_sec;
tvnow.tv_usec = now.tv_usec;
if (pa_timeval_cmp(&t->timeval, &tvnow) <= 0) {
*timeout = 0;
return TRUE;
}
usec = pa_timeval_diff(&t->timeval, &tvnow);
*timeout = (gint) (usec / 1000);
} else
*timeout = -1;
return FALSE;
}
static gboolean check_func(GSource *source) {
pa_glib_mainloop *g = (pa_glib_mainloop*) source;
pa_io_event *e;
g_assert(g);
if (g->n_enabled_defer_events)
return TRUE;
else if (g->n_enabled_time_events) {
pa_time_event *t;
GTimeVal now;
struct timeval tvnow;
t = find_next_time_event(g);
g_assert(t);
g_source_get_current_time(source, &now);
tvnow.tv_sec = now.tv_sec;
tvnow.tv_usec = now.tv_usec;
if (pa_timeval_cmp(&t->timeval, &tvnow) <= 0)
return TRUE;
}
for (e = g->io_events; e; e = e->next)
if (!e->dead && e->poll_fd.revents != 0)
return TRUE;
return FALSE;
}
static gboolean dispatch_func(GSource *source, PA_GCC_UNUSED GSourceFunc callback, PA_GCC_UNUSED gpointer userdata) {
pa_glib_mainloop *g = (pa_glib_mainloop*) source;
pa_io_event *e;
g_assert(g);
if (g->n_enabled_defer_events) {
pa_defer_event *d;
for (d = g->defer_events; d; d = d->next) {
if (d->dead || !d->enabled)
continue;
break;
}
g_assert(d);
d->callback(&g->api, d, d->userdata);
return TRUE;
}
if (g->n_enabled_time_events) {
GTimeVal now;
struct timeval tvnow;
pa_time_event *t;
t = find_next_time_event(g);
g_assert(t);
g_source_get_current_time(source, &now);
tvnow.tv_sec = now.tv_sec;
tvnow.tv_usec = now.tv_usec;
if (pa_timeval_cmp(&t->timeval, &tvnow) <= 0) {
/* Disable time event */
glib_time_restart(t, NULL);
t->callback(&g->api, t, &t->timeval, t->userdata);
return TRUE;
}
}
for (e = g->io_events; e; e = e->next)
if (!e->dead && e->poll_fd.revents != 0) {
e->callback(&g->api, e, e->poll_fd.fd, map_flags_from_glib(e->poll_fd.revents), e->userdata);
e->poll_fd.revents = 0;
return TRUE;
}
return FALSE;
}
static const pa_mainloop_api vtable = {
.userdata = NULL,
.io_new = glib_io_new,
.io_enable = glib_io_enable,
.io_free = glib_io_free,
.io_set_destroy= glib_io_set_destroy,
.time_new = glib_time_new,
.time_restart = glib_time_restart,
.time_free = glib_time_free,
.time_set_destroy = glib_time_set_destroy,
.defer_new = glib_defer_new,
.defer_enable = glib_defer_enable,
.defer_free = glib_defer_free,
.defer_set_destroy = glib_defer_set_destroy,
.quit = glib_quit,
};
pa_glib_mainloop *pa_glib_mainloop_new(GMainContext *c) {
pa_glib_mainloop *g;
static GSourceFuncs source_funcs = {
prepare_func,
check_func,
dispatch_func,
NULL,
NULL,
NULL
};
g = (pa_glib_mainloop*) g_source_new(&source_funcs, sizeof(pa_glib_mainloop));
g_main_context_ref(g->context = c ? c : g_main_context_default());
g->api = vtable;
g->api.userdata = g;
PA_LLIST_HEAD_INIT(pa_io_event, g->io_events);
PA_LLIST_HEAD_INIT(pa_time_event, g->time_events);
PA_LLIST_HEAD_INIT(pa_defer_event, g->defer_events);
g->n_enabled_defer_events = g->n_enabled_time_events = 0;
g->io_events_please_scan = g->time_events_please_scan = g->defer_events_please_scan = 0;
g->cached_next_time_event = NULL;
g_source_attach(&g->source, g->context);
g_source_set_can_recurse(&g->source, FALSE);
return g;
}
void pa_glib_mainloop_free(pa_glib_mainloop* g) {
g_assert(g);
cleanup_io_events(g, 1);
cleanup_defer_events(g, 1);
cleanup_time_events(g, 1);
g_main_context_unref(g->context);
g_source_destroy(&g->source);
g_source_unref(&g->source);
}
pa_mainloop_api* pa_glib_mainloop_get_api(pa_glib_mainloop *g) {
g_assert(g);
return &g->api;
}
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