zdoom/fluidsynth
0
0
Fork 0
mirror of https://github.com/ZDoom/fluidsynth.git synced 2024-11-10 23:11:41 +00:00
Code Issues Projects Releases Packages Wiki Activity

avoid data races in rvoice_eventhandler and cleanup

Browse source 
- an element from the queue might be requested from thread A
- thread A is put to sleep just before he could insert his event and increment queue_stored
- thread B request an element from queue, gets the same as thread A
- thread B commits his changes and increases queue_stored
- thread A wakes up, commits his changes
- event of thread B is lost
This commit is contained in:
derselbst 2017-08-25 16:21:20 +02:00 committed by derselbst
parent ef9564e000
commit 680fcf1f88
1 changed files with 39 additions and 50 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

89
fluidsynth/src/rvoice/fluid_rvoice_event.c
View file

@ -65,6 +65,9 @@
event->realparams[1], event->realparams[2], event->realparams[3]); \
return; }
static int fluid_rvoice_eventhandler_push_LOCAL(fluid_rvoice_eventhandler_t* handler, const fluid_rvoice_event_t* src_event);
void
fluid_rvoice_event_dispatch(fluid_rvoice_event_t* event)
{
@ -131,25 +134,14 @@ fluid_rvoice_eventhandler_push(fluid_rvoice_eventhandler_t* handler,
void* method, void* object, int intparam,
fluid_real_t realparam)
{
fluid_rvoice_event_t* event;
fluid_rvoice_event_t local_event;
event = handler->is_threadsafe ?
fluid_ringbuffer_get_inptr(handler->queue, handler->queue_stored) : &local_event;
if (event == NULL) {
FLUID_LOG(FLUID_WARN, "Ringbuffer full, try increasing polyphony!");
return FLUID_FAILED; // Buffer full...
}
event->method = method;
event->object = object;
event->intparam = intparam;
event->realparams[0] = realparam;
if (handler->is_threadsafe)
handler->queue_stored++;
else
fluid_rvoice_event_dispatch(event);
return FLUID_OK;
local_event.method = method;
local_event.object = object;
local_event.intparam = intparam;
local_event.realparams[0] = realparam;
return fluid_rvoice_eventhandler_push_LOCAL(handler, &local_event);
}
@ -157,24 +149,13 @@ int
fluid_rvoice_eventhandler_push_ptr(fluid_rvoice_eventhandler_t* handler,
void* method, void* object, void* ptr)
{
fluid_rvoice_event_t* event;
fluid_rvoice_event_t local_event;
event = handler->is_threadsafe ?
fluid_ringbuffer_get_inptr(handler->queue, handler->queue_stored) : &local_event;
if (event == NULL) {
FLUID_LOG(FLUID_WARN, "Ringbuffer full, try increasing polyphony!");
return FLUID_FAILED; // Buffer full...
}
event->method = method;
event->object = object;
event->ptr = ptr;
if (handler->is_threadsafe)
handler->queue_stored++;
else
fluid_rvoice_event_dispatch(event);
return FLUID_OK;
local_event.method = method;
local_event.object = object;
local_event.ptr = ptr;
return fluid_rvoice_eventhandler_push_LOCAL(handler, &local_event);
}
@ -184,28 +165,36 @@ fluid_rvoice_eventhandler_push5(fluid_rvoice_eventhandler_t* handler,
fluid_real_t r1, fluid_real_t r2,
fluid_real_t r3, fluid_real_t r4, fluid_real_t r5)
{
fluid_rvoice_event_t* event;
fluid_rvoice_event_t local_event;
event = handler->is_threadsafe ?
fluid_ringbuffer_get_inptr(handler->queue, handler->queue_stored) : &local_event;
local_event.method = method;
local_event.object = object;
local_event.intparam = intparam;
local_event.realparams[0] = r1;
local_event.realparams[1] = r2;
local_event.realparams[2] = r3;
local_event.realparams[3] = r4;
local_event.realparams[4] = r5;
return fluid_rvoice_eventhandler_push_LOCAL(handler, &local_event);
}
static int fluid_rvoice_eventhandler_push_LOCAL(fluid_rvoice_eventhandler_t* handler, const fluid_rvoice_event_t* src_event)
{
fluid_rvoice_event_t* event;
int old_queue_stored = fluid_atomic_int_add(&handler->queue_stored, 1);
event = fluid_ringbuffer_get_inptr(handler->queue, old_queue_stored);
if (event == NULL) {
fluid_atomic_int_dec_and_test(&handler->queue_stored);
FLUID_LOG(FLUID_WARN, "Ringbuffer full, try increasing polyphony!");
return FLUID_FAILED; // Buffer full...
}
event->method = method;
event->object = object;
event->intparam = intparam;
event->realparams[0] = r1;
event->realparams[1] = r2;
event->realparams[2] = r3;
event->realparams[3] = r4;
event->realparams[4] = r5;
if (handler->is_threadsafe)
handler->queue_stored++;
else
fluid_rvoice_event_dispatch(event);
memcpy(event, src_event, sizeof(*event));
return FLUID_OK;
}