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-rw-r--r--src/pulsecore/anotify.c143
-rw-r--r--src/pulsecore/anotify.h38
2 files changed, 181 insertions, 0 deletions
diff --git a/src/pulsecore/anotify.c b/src/pulsecore/anotify.c
new file mode 100644
index 00000000..a61f8442
--- /dev/null
+++ b/src/pulsecore/anotify.c
@@ -0,0 +1,143 @@
+/* $Id$ */
+
+/***
+ 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 2.1 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, 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 <unistd.h>
+#include <fcntl.h>
+
+#include <pulse/xmalloc.h>
+
+#include "anotify.h"
+
+#define EVENTS_MAX 16
+
+struct pa_anotify {
+ pa_mainloop_api *api;
+ pa_anotify_cb_t callback;
+ void *userdata;
+ int fds[2];
+ pa_io_event *io_event;
+ pa_defer_event *defer_event;
+
+ uint8_t queued_events[EVENTS_MAX];
+ unsigned n_queued_events, queue_index;
+};
+
+static void dispatch_event(pa_anotify *a) {
+ assert(a);
+ assert(a->queue_index < a->n_queued_events);
+
+ a->callback(a->queued_events[a->queue_index++], a->userdata);
+
+ if (a->queue_index >= a->n_queued_events) {
+ a->n_queued_events = 0;
+ a->queue_index = 0;
+
+ a->api->io_enable(a->io_event, PA_IO_EVENT_INPUT);
+ a->api->defer_enable(a->defer_event, 0);
+ } else {
+ a->api->io_enable(a->io_event, 0);
+ a->api->defer_enable(a->defer_event, 1);
+ }
+}
+
+static void io_callback(
+ pa_mainloop_api *api,
+ pa_io_event *e,
+ int fd,
+ pa_io_event_flags_t events,
+ void *userdata) {
+
+ pa_anotify *a = userdata;
+ ssize_t r;
+
+ assert(a);
+ assert(events == PA_IO_EVENT_INPUT);
+ assert(a->n_queued_events == 0);
+
+ r = read(fd, a->queued_events, sizeof(a->queued_events));
+ assert(r > 0);
+
+ a->n_queued_events = (unsigned) r;
+ a->queue_index = 0;
+
+ /* Only dispatch a single event */
+ dispatch_event(a);
+}
+
+static void defer_callback(pa_mainloop_api *api, pa_defer_event *e, void *userdata) {
+ pa_anotify *a = userdata;
+ assert(a);
+
+ dispatch_event(a);
+}
+
+pa_anotify *pa_anotify_new(pa_mainloop_api*api, pa_anotify_cb_t cb, void *userdata) {
+ pa_anotify *a;
+
+ assert(api);
+ assert(cb);
+
+ a = pa_xnew(pa_anotify, 1);
+
+ if (pipe(a->fds) < 0) {
+ pa_xfree(a);
+ return NULL;
+ }
+
+ a->api = api;
+ a->callback = cb;
+ a->userdata = userdata;
+
+ a->io_event = api->io_new(api, a->fds[0], PA_IO_EVENT_INPUT, io_callback, a);
+ a->defer_event = api->defer_new(api, defer_callback, a);
+ a->api->defer_enable(a->defer_event, 0);
+
+ a->n_queued_events = 0;
+
+ return a;
+}
+
+void pa_anotify_free(pa_anotify *a) {
+ assert(a);
+
+ a->api->io_free(a->io_event);
+ a->api->defer_free(a->defer_event);
+
+ if (a->fds[0] >= 0)
+ close(a->fds[0]);
+ if (a->fds[1] >= 0)
+ close(a->fds[1]);
+
+ pa_xfree(a);
+}
+
+int pa_anotify_signal(pa_anotify *a, uint8_t event) {
+ ssize_t r;
+ assert(a);
+
+ r = write(a->fds[1], &event, 1);
+ return r != 1 ? -1 : 0;
+}
diff --git a/src/pulsecore/anotify.h b/src/pulsecore/anotify.h
new file mode 100644
index 00000000..44e942f7
--- /dev/null
+++ b/src/pulsecore/anotify.h
@@ -0,0 +1,38 @@
+#ifndef foopulseanotifyhfoo
+#define foopulseanotifyhfoo
+
+/* $Id$ */
+
+/***
+ 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.
+***/
+
+/* Asynchronous thread-safe notification of mainloops */
+
+
+#include <inttypes.h>
+#include <pulse/mainloop-api.h>
+
+typedef struct pa_anotify pa_anotify;
+typedef void (*pa_anotify_cb_t)(uint8_t event, void *userdata);
+
+pa_anotify *pa_anotify_new(pa_mainloop_api*api, pa_anotify_cb_t cb, void *userdata);
+void pa_anotify_free(pa_anotify *a);
+int pa_anotify_signal(pa_anotify *a, uint8_t event);
+
+#endif