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-rw-r--r--src/pulse/operation.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/src/pulse/operation.c b/src/pulse/operation.c
new file mode 100644
index 00000000..24ddf69f
--- /dev/null
+++ b/src/pulse/operation.c
@@ -0,0 +1,116 @@
+/* $Id$ */
+
+/***
+ 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 "internal.h"
+#include "operation.h"
+
+pa_operation *pa_operation_new(pa_context *c, pa_stream *s, pa_operation_cb_t cb, void *userdata) {
+ pa_operation *o;
+ assert(c);
+
+ o = pa_xnew(pa_operation, 1);
+ o->ref = 1;
+ o->context = c;
+ o->stream = s;
+
+ o->state = PA_OPERATION_RUNNING;
+ o->callback = cb;
+ o->userdata = userdata;
+
+ /* Refcounting is strictly one-way: from the "bigger" to the "smaller" object. */
+ PA_LLIST_PREPEND(pa_operation, c->operations, o);
+ pa_operation_ref(o);
+
+ return o;
+}
+
+pa_operation *pa_operation_ref(pa_operation *o) {
+ assert(o);
+ assert(o->ref >= 1);
+
+ o->ref++;
+ return o;
+}
+
+void pa_operation_unref(pa_operation *o) {
+ assert(o);
+ assert(o->ref >= 1);
+
+ if ((--(o->ref)) == 0) {
+ assert(!o->context);
+ assert(!o->stream);
+ pa_xfree(o);
+ }
+}
+
+static void operation_set_state(pa_operation *o, pa_operation_state_t st) {
+ assert(o);
+ assert(o->ref >= 1);
+
+ if (st == o->state)
+ return;
+
+ o->state = st;
+
+ if ((o->state == PA_OPERATION_DONE) || (o->state == PA_OPERATION_CANCELED)) {
+
+ if (o->context) {
+ assert(o->ref >= 2);
+
+ PA_LLIST_REMOVE(pa_operation, o->context->operations, o);
+ pa_operation_unref(o);
+ }
+
+ o->context = NULL;
+ o->stream = NULL;
+ o->callback = NULL;
+ o->userdata = NULL;
+ }
+}
+
+void pa_operation_cancel(pa_operation *o) {
+ assert(o);
+ assert(o->ref >= 1);
+
+ operation_set_state(o, PA_OPERATION_CANCELED);
+}
+
+void pa_operation_done(pa_operation *o) {
+ assert(o);
+ assert(o->ref >= 1);
+
+ operation_set_state(o, PA_OPERATION_DONE);
+}
+
+pa_operation_state_t pa_operation_get_state(pa_operation *o) {
+ assert(o);
+ assert(o->ref >= 1);
+
+ return o->state;
+}