1 files changed, 103 insertions, 0 deletions
diff --git a/src/polyp/polyplib-operation.c b/src/polyp/polyplib-operation.c
new file mode 100644
index 000000000..ea336c173
--- /dev/null
+++ b/src/polyp/polyplib-operation.c
@@ -0,0 +1,103 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser 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 Lesser 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 <assert.h>
+
+#include <polypcore/xmalloc.h>
+#include "polyplib-internal.h"
+#include "polyplib-operation.h"
+
+pa_operation *pa_operation_new(pa_context *c, pa_stream *s) {
+    pa_operation *o;
+    assert(c);
+
+    o = pa_xmalloc(sizeof(pa_operation));
+    o->ref = 1;
+    o->context = pa_context_ref(c);
+    o->stream = s ? pa_stream_ref(s) : NULL;
+
+    o->state = PA_OPERATION_RUNNING;
+    o->userdata = NULL;
+    o->callback = NULL;
+
+    PA_LLIST_PREPEND(pa_operation, o->context->operations, o);
+    return pa_operation_ref(o);
+}
+
+pa_operation *pa_operation_ref(pa_operation *o) {
+    assert(o && o->ref >= 1);
+    o->ref++;
+    return o;
+}
+
+void pa_operation_unref(pa_operation *o) {
+    assert(o && o->ref >= 1);
+
+    if ((--(o->ref)) == 0) {
+        assert(!o->context);
+        assert(!o->stream);
+        free(o);
+    }
+}
+
+static void operation_set_state(pa_operation *o, pa_operation_state_t st) {
+    assert(o && o->ref >= 1);
+
+    if (st == o->state)
+        return;
+
+    if (!o->context)
+        return;
+
+    o->state = st;
+
+    if ((o->state == PA_OPERATION_DONE) || (o->state == PA_OPERATION_CANCELED)) {
+        PA_LLIST_REMOVE(pa_operation, o->context->operations, o);
+        pa_context_unref(o->context);
+        if (o->stream)
+            pa_stream_unref(o->stream);
+        o->context = NULL;
+        o->stream = NULL;
+        o->callback = NULL;
+        o->userdata = NULL;
+
+        pa_operation_unref(o);
+    }
+}
+
+void pa_operation_cancel(pa_operation *o) {
+    assert(o && o->ref >= 1);
+    operation_set_state(o, PA_OPERATION_CANCELED);
+}
+
+void pa_operation_done(pa_operation *o) {
+    assert(o && o->ref >= 1);
+    operation_set_state(o, PA_OPERATION_DONE);
+}
+
+pa_operation_state_t pa_operation_get_state(pa_operation *o) {
+    assert(o && o->ref >= 1);
+    return o->state;
+}