Function SendStateChangeEvent

3rdparty/openal/al/source.cpp:699–717

Can only be called while the mixer is locked! */

/** Can only be called while the mixer is locked! */
void SendStateChangeEvent(ALCcontext *context, ALuint id, ALenum state)
{
    ALbitfieldSOFT enabledevt{context->mEnabledEvts.load(std::memory_order_acquire)};
    if(!(enabledevt&EventType_SourceStateChange)) return;

    /* The mixer may have queued a state change that's not yet been processed,
     * and we don't want state change messages to occur out of order, so send
     * it through the async queue to ensure proper ordering.
     */
    RingBuffer *ring{context->mAsyncEvents.get()};
    auto evt_vec = ring->getWriteVector();
    if(evt_vec.first.len < 1) return;

    AsyncEvent *evt{::new (evt_vec.first.buf) AsyncEvent{EventType_SourceStateChange}};
    evt->u.srcstate.id = id;
    evt->u.srcstate.state = state;
    ring->writeAdvance(1);
    context->mEventSem.post();
}


constexpr size_t MaxValues{6u};