make example code a bit more robust/change-proof

diff --git a/src/pulse/thread-mainloop.h b/src/pulse/thread-mainloop.h
index 4de338a14c3bc3cd8af623e59e045b5a48f5bab5..f0b1a84b4cdd7b3dfd4b19787fc83fe3a9dc0e72 100644 (file)
--- a/src/pulse/thread-mainloop.h
+++ b/src/pulse/thread-mainloop.h
@@ -108,10 +108,10 @@ PA_C_DECL_BEGIN
  * Example:
  *
  * \code
- * static void my_drain_callback(pa_stream*s, int success, void *userdata) {
+ * static void my_drain_callback(pa_stream *s, int success, void *userdata) {
  *     pa_threaded_mainloop *m;
  *
- *     m = (pa_threaded_mainloop*)userdata;
+ *     m = userdata;
  *     assert(m);
  *
  *     pa_threaded_mainloop_signal(m, 0);
@@ -125,7 +125,7 @@ PA_C_DECL_BEGIN
  *     o = pa_stream_drain(s, my_drain_callback, m);
  *     assert(o);
  *
- *     while (pa_operation_get_state(o) != OPERATION_DONE)
+ *     while (pa_operation_get_state(o) == PA_OPERATION_RUNNING)
  *         pa_threaded_mainloop_wait(m);
  *
  *     pa_operation_unref(o);
@@ -167,7 +167,7 @@ PA_C_DECL_BEGIN
  * static void my_drain_callback(pa_stream*s, int success, void *userdata) {
  *     pa_threaded_mainloop *m;
  *
- *     m = (pa_threaded_mainloop*)userdata;
+ *     m = userdata;
  *     assert(m);
  *
  *     drain_result = &success;
@@ -183,7 +183,7 @@ PA_C_DECL_BEGIN
  *     o = pa_stream_drain(s, my_drain_callback, m);
  *     assert(o);
  *
- *     while (pa_operation_get_state(o) != OPERATION_DONE)
+ *     while (pa_operation_get_state(o) == PA_OPERATION_RUNNING)
  *         pa_threaded_mainloop_wait(m);
  *
  *     pa_operation_unref(o);