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doc: tutorial3: remove done variable

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Use `pw_main_loop_quit()` alone, which should be enough
to cause `pw_main_loop_run()` to return. `pw_main_loop_run()`
only returns prematurely when there is an error, but since
there is no error handling in this example, that scenario
is ignored.
This commit is contained in:
Barnabás Pőcze 2022-07-21 00:24:46 +02:00 committed by Wim Taymans
parent f61bb3aef5
commit 04e65a86a1
2 changed files with 9 additions and 17 deletions
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11
doc/tutorial3.c
View file

@ -10,12 +10,10 @@
static int roundtrip(struct pw_core *core, struct pw_main_loop *loop)
{
struct spa_hook core_listener;
int pending, done = 0;
int pending;
void core_event_done(void *object, uint32_t id, int seq) {
if (id == PW_ID_CORE && seq == pending) {
done = 1;
if (id == PW_ID_CORE && seq == pending)
pw_main_loop_quit(loop);
}
}
const struct pw_core_events core_events = {
PW_VERSION_CORE_EVENTS,
@ -27,9 +25,8 @@ static int roundtrip(struct pw_core *core, struct pw_main_loop *loop)
pending = pw_core_sync(core, PW_ID_CORE, 0);
while (!done) {
pw_main_loop_run(loop);
}
pw_main_loop_run(loop);
spa_hook_remove(&core_listener);
return 0;
}

15
doc/tutorial3.dox
View file

@ -26,13 +26,11 @@ object. We are only interested in the `done` event in this
tutorial. This is the event handler:
\code{.c}
int pending, done = 0;
int pending;
void core_event_done(void *data, uint32_t id, int seq) {
if (id == PW_ID_CORE && seq == pending) {
done = 1;
if (id == PW_ID_CORE && seq == pending)
pw_main_loop_quit(loop);
}
}
const struct pw_core_events core_events = {
PW_VERSION_CORE_EVENTS,
@ -40,9 +38,8 @@ tutorial. This is the event handler:
};
\endcode
When the done event is received for an object with id `PW_ID_CORE`
and a certain sequence number `seq`, this function will set the done
variable to 1 and call `pw_main_loop_quit()`.
When the done event is received for an object with id `PW_ID_CORE` and
a certain sequence number `seq`, this function will call `pw_main_loop_quit()`.
Next we do:
@ -68,9 +65,7 @@ We then run the mainloop to send the messages to the server and
receive the events:
\code{.c}
while (!done) {
pw_main_loop_run(loop);
}
pw_main_loop_run(loop);
\endcode
When we get the done event, we can compare it to the sync method