From 6befb5faa6fa95ca63ec62e240263f79c79432e2 Mon Sep 17 00:00:00 2001 From: Gary Scavone Date: Mon, 10 Dec 2012 19:03:43 +0000 Subject: Updates for SCHED_RR in ALSA API, plus support in configure for powerpc64 (gs). --- RtAudio.cpp | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) (limited to 'RtAudio.cpp') diff --git a/RtAudio.cpp b/RtAudio.cpp index 8477ef9..68dabff 100644 --- a/RtAudio.cpp +++ b/RtAudio.cpp @@ -5881,22 +5881,21 @@ bool RtApiAlsa :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigne pthread_attr_t attr; pthread_attr_init( &attr ); pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_JOINABLE ); + #ifdef SCHED_RR // Undefined with some OSes (eg: NetBSD 1.6.x with GNU Pthread) if ( options && options->flags & RTAUDIO_SCHEDULE_REALTIME ) { - struct sched_param param; + // We previously attempted to increase the audio callback priority + // to SCHED_RR here via the attributes. However, while no errors + // were reported in doing so, it did not work. So, now this is + // done in the alsaCallbackHandler function. + stream_.callbackInfo.doRealtime = true; int priority = options->priority; int min = sched_get_priority_min( SCHED_RR ); int max = sched_get_priority_max( SCHED_RR ); if ( priority < min ) priority = min; else if ( priority > max ) priority = max; - param.sched_priority = priority; - pthread_attr_setschedpolicy( &attr, SCHED_RR ); - pthread_attr_setschedparam( &attr, ¶m ); + stream_.callbackInfo.priority = priority; } - else - pthread_attr_setschedpolicy( &attr, SCHED_OTHER ); -#else - pthread_attr_setschedpolicy( &attr, SCHED_OTHER ); #endif stream_.callbackInfo.isRunning = true; @@ -6314,6 +6313,14 @@ extern "C" void *alsaCallbackHandler( void *ptr ) RtApiAlsa *object = (RtApiAlsa *) info->object; bool *isRunning = &info->isRunning; +#ifdef SCHED_RR // Undefined with some OSes (eg: NetBSD 1.6.x with GNU Pthread) + if ( &info->doRealtime ) { + pthread_t tID = pthread_self(); // ID of this thread + sched_param prio = { info->priority }; // scheduling priority of thread + pthread_setschedparam( tID, SCHED_RR, &prio ); + } +#endif + while ( *isRunning == true ) { pthread_testcancel(); object->callbackEvent(); -- cgit v1.2.3