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#include "config.h"
#include <algorithm>
#include "AL/alc.h"
#include "AL/al.h"
#include "AL/alext.h"
#include "alMain.h"
#include "alcontext.h"
#include "alError.h"
#include "alAuxEffectSlot.h"
#include "ringbuffer.h"
#include "threads.h"
static int EventThread(ALCcontext *context)
{
bool quitnow{false};
while(LIKELY(!quitnow))
{
AsyncEvent evt;
if(ll_ringbuffer_read(context->AsyncEvents, &evt, 1) == 0)
{
context->EventSem.wait();
continue;
}
std::lock_guard<std::mutex> _{context->EventCbLock};
do {
quitnow = evt.EnumType == EventType_KillThread;
if(UNLIKELY(quitnow)) break;
if(evt.EnumType == EventType_ReleaseEffectState)
{
evt.u.mEffectState->DecRef();
continue;
}
ALbitfieldSOFT enabledevts{context->EnabledEvts.load(std::memory_order_acquire)};
if(!context->EventCb) continue;
if(evt.EnumType == EventType_SourceStateChange)
{
if(!(enabledevts&EventType_SourceStateChange))
continue;
char msg[1024]{};
int msglen{snprintf(msg, sizeof(msg), "Source ID %u state changed to %s",
evt.u.srcstate.id,
(evt.u.srcstate.state==AL_INITIAL) ? "AL_INITIAL" :
(evt.u.srcstate.state==AL_PLAYING) ? "AL_PLAYING" :
(evt.u.srcstate.state==AL_PAUSED) ? "AL_PAUSED" :
(evt.u.srcstate.state==AL_STOPPED) ? "AL_STOPPED" : "<unknown>"
)};
if(msglen < 1) msglen = strlen(msg);
context->EventCb(AL_EVENT_TYPE_SOURCE_STATE_CHANGED_SOFT, evt.u.srcstate.id,
evt.u.srcstate.state, msglen, msg, context->EventParam
);
}
else if((enabledevts&evt.EnumType) == evt.EnumType)
context->EventCb(evt.u.user.type, evt.u.user.id, evt.u.user.param,
(ALsizei)strlen(evt.u.user.msg), evt.u.user.msg, context->EventParam
);
} while(ll_ringbuffer_read(context->AsyncEvents, &evt, 1) != 0);
}
return 0;
}
void StartEventThrd(ALCcontext *ctx)
{
try {
ctx->EventThread = std::thread(EventThread, ctx);
}
catch(std::exception& e) {
ERR("Failed to start event thread: %s\n", e.what());
}
catch(...) {
ERR("Failed to start event thread! Expect problems.\n");
}
}
void StopEventThrd(ALCcontext *ctx)
{
static constexpr AsyncEvent kill_evt = ASYNC_EVENT(EventType_KillThread);
while(ll_ringbuffer_write(ctx->AsyncEvents, &kill_evt, 1) == 0)
std::this_thread::yield();
ctx->EventSem.post();
if(ctx->EventThread.joinable())
ctx->EventThread.join();
}
AL_API void AL_APIENTRY alEventControlSOFT(ALsizei count, const ALenum *types, ALboolean enable)
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
if(count < 0) SETERR_RETURN(context.get(), AL_INVALID_VALUE,, "Controlling %d events", count);
if(count == 0) return;
if(!types) SETERR_RETURN(context.get(), AL_INVALID_VALUE,, "NULL pointer");
ALbitfieldSOFT flags{0};
const ALenum *types_end = types+count;
auto bad_type = std::find_if_not(types, types_end,
[&flags](ALenum type) noexcept -> bool
{
if(type == AL_EVENT_TYPE_BUFFER_COMPLETED_SOFT)
flags |= EventType_BufferCompleted;
else if(type == AL_EVENT_TYPE_SOURCE_STATE_CHANGED_SOFT)
flags |= EventType_SourceStateChange;
else if(type == AL_EVENT_TYPE_ERROR_SOFT)
flags |= EventType_Error;
else if(type == AL_EVENT_TYPE_PERFORMANCE_SOFT)
flags |= EventType_Performance;
else if(type == AL_EVENT_TYPE_DEPRECATED_SOFT)
flags |= EventType_Deprecated;
else if(type == AL_EVENT_TYPE_DISCONNECTED_SOFT)
flags |= EventType_Disconnected;
else
return false;
return true;
}
);
if(bad_type != types_end)
SETERR_RETURN(context.get(), AL_INVALID_ENUM,, "Invalid event type 0x%04x", *bad_type);
if(enable)
{
ALbitfieldSOFT enabledevts{context->EnabledEvts.load(std::memory_order_relaxed)};
while(context->EnabledEvts.compare_exchange_weak(enabledevts, enabledevts|flags,
std::memory_order_acq_rel, std::memory_order_acquire) == 0)
{
/* enabledevts is (re-)filled with the current value on failure, so
* just try again.
*/
}
}
else
{
ALbitfieldSOFT enabledevts{context->EnabledEvts.load(std::memory_order_relaxed)};
while(context->EnabledEvts.compare_exchange_weak(enabledevts, enabledevts&~flags,
std::memory_order_acq_rel, std::memory_order_acquire) == 0)
{
}
/* Wait to ensure the event handler sees the changed flags before
* returning.
*/
std::lock_guard<std::mutex>{context->EventCbLock};
}
}
AL_API void AL_APIENTRY alEventCallbackSOFT(ALEVENTPROCSOFT callback, void *userParam)
{
ContextRef context{GetContextRef()};
if(UNLIKELY(!context)) return;
std::lock_guard<std::mutex> _{context->PropLock};
std::lock_guard<std::mutex> __{context->EventCbLock};
context->EventCb = callback;
context->EventParam = userParam;
}
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