Cleanup and add SetThreadPrecedence().

stepmania/src/archutils/Darwin/DarwinThreadHelpers.cpp

@@ -1,7 +1,9 @@
 #include <mach/mach_types.h>
 #include <mach/thread_act.h>
 #include <mach/mach_init.h>
+#include <mach/mach_error.h>
 #include "Backtrace.h"
+#include "RageLog.h"
 
 bool SuspendThread( uint64_t threadHandle )
 {
@@ -29,16 +31,26 @@ bool GetThreadBacktraceContext(uint64_t iID, BacktraceContext *ctx)
 	ppc_thread_state state;
 	mach_msg_type_number_t count = PPC_THREAD_STATE_COUNT;
 	
-	if (thread_get_state(thread, PPC_THREAD_STATE, thread_state_t(&state),
+	if( thread_get_state(thread, PPC_THREAD_STATE, thread_state_t(&state), &count) )
-						 &count))
 		return false;
 	ctx->FramePtr = (void *)state.r1;
 	ctx->PC = (void *)state.srr0;
 	return true;
 }
 
+void SetThreadPrecedence( int prec )
+{
+	thread_precedence_policy po = { prec };
+	kern_return_t ret = thread_policy_set( mach_thread_self(), THREAD_PRECEDENCE_POLICY,
+										   (int *)&po, THREAD_PRECEDENCE_POLICY_COUNT );
+	
+	if( ret != KERN_SUCCESS )
+		LOG->Warn( "Couldn't set the precedence for the input thread: %s",
+				   mach_error_string(ret) );
+}
+	
 /*
- * (c) 2004 Steve Checkoway
+ * (c) 2004, 2005 Steve Checkoway
  * All rights reserved.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a

stepmania/src/archutils/Darwin/DarwinThreadHelpers.h

@@ -4,11 +4,12 @@
 bool SuspendThread( uint64_t threadHandle );
 bool ResumeThread( uint64_t threadHandle );
 uint64_t GetCurrentThreadId();
+void SetThreadPrecedence( int prec );
 
 #endif
 
 /*
- * (c) 2004 Steve Checkoway
+ * (c) 2004, 2005 Steve Checkoway
  * All rights reserved.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a