From d2136fb15b87fa4146ab6146ba531a564c4cc895 Mon Sep 17 00:00:00 2001
From: Steve Checkoway <stevecheckoway@users.sourceforge.net>
Date: Fri, 10 Feb 2006 10:28:01 +0000
Subject: [PATCH] Cleanup. There is no way to prevent being preempted on OS X.

---
 .../src/arch/ArchHooks/ArchHooks_darwin.cpp   | 65 -------------------
 .../src/arch/ArchHooks/ArchHooks_darwin.h     |  8 +--
 2 files changed, 1 insertion(+), 72 deletions(-)

diff --git a/stepmania/src/arch/ArchHooks/ArchHooks_darwin.cpp b/stepmania/src/arch/ArchHooks/ArchHooks_darwin.cpp
index 51422dac7f..163709d4c6 100644
--- a/stepmania/src/arch/ArchHooks/ArchHooks_darwin.cpp
+++ b/stepmania/src/arch/ArchHooks/ArchHooks_darwin.cpp
@@ -1,26 +1,15 @@
 #include "global.h"
 #include "ArchHooks_darwin.h"
 #include "RageLog.h"
-#include "RageThreads.h"
-#include "RageTimer.h"
 #include "RageUtil.h"
 #include "archutils/Darwin/Crash.h"
 #include "archutils/Unix/CrashHandler.h"
 #include "archutils/Unix/SignalHandler.h"
 #include "ProductInfo.h"
 #include <Carbon/Carbon.h>
-#include <CoreFoundation/CoreFoundation.h>
-#include <mach/thread_act.h>
 #include <mach/mach.h>
 #include <mach/host_info.h>
 #include <mach/mach_time.h>
-#include <sys/types.h>
-#include <sys/time.h>
-
-#if 0 // Time critical stuff
-static thread_time_constraint_policy g_oldttcpolicy;
-static float g_fStartedTimeCritAt;
-#endif
 
 static bool IsFatalSignal( int signal )
 {
@@ -66,8 +55,6 @@ ArchHooks_darwin::ArchHooks_darwin()
 	SignalHandler::OnClose( DoCrashSignalHandler );
 #endif
 	
-	//TimeCritMutex = new RageMutex("TimeCritMutex");
-	
 	// CF*Copy* functions' return values need to be released, CF*Get* functions' do not.
 	CFStringRef key = CFSTR( "ApplicationBundlePath" );
 	
@@ -116,11 +103,6 @@ ArchHooks_darwin::ArchHooks_darwin()
 	CFRelease( path );
 }
 
-ArchHooks_darwin::~ArchHooks_darwin()
-{
-	//delete TimeCritMutex;
-}
-
 void ArchHooks_darwin::DumpDebugInfo()
 {
 	RString systemVersion;
@@ -225,53 +207,6 @@ RString ArchHooks::GetPreferredLanguage()
 	return ret.ToUpper();
 }
 
-void ArchHooks_darwin::EnterTimeCriticalSection()
-{
-#if 0
-	TimeCritMutex->Lock();
-
-	int mib[] = { CTL_HW, HW_BUS_FREQ };
-	int miblen = ARRAYSIZE( mib );
-	int bus_speed;
-	size_t len = sizeof (bus_speed);
-	if( sysctl( mib, miblen, &bus_speed, &len, NULL, 0 ) == -1 )
-	{
-		LOG->Warn( "sysctl(HW_BUS_FREQ): %s", strerror(errno) );
-		return;
-	}
-
-	mach_msg_type_number_t cnt = THREAD_TIME_CONSTRAINT_POLICY_COUNT;
-	boolean_t bDefaults = false;
-	thread_policy_get( mach_thread_self(), THREAD_TIME_CONSTRAINT_POLICY, (int*)&g_oldttcpolicy, &cnt, &bDefaults );
-
-	/* We want to monopolize the CPU for a very short period of time.  This means that the
-	 * period doesn't really matter, and we don't want to be preempted.  Set the period
-	 * very high (~1 second), so that if we ever lose the CPU when we shouldn't, we can
-	 * detect it and log it in ExitTimeCriticalSection(). */
-	thread_time_constraint_policy ttcpolicy;
-	ttcpolicy.period = bus_speed;
-	ttcpolicy.computation = ttcpolicy.constraint = bus_speed/60;
-	ttcpolicy.preemptible = 0;
-	thread_policy_set( mach_thread_self(), THREAD_TIME_CONSTRAINT_POLICY,
-		(int*)&ttcpolicy, THREAD_TIME_CONSTRAINT_POLICY_COUNT );
-
-	g_fStartedTimeCritAt = RageTimer::GetTimeSinceStart();
-#endif
-}
-
-void ArchHooks_darwin::ExitTimeCriticalSection()
-{
-#if 0
-	thread_policy_set( mach_thread_self(), THREAD_TIME_CONSTRAINT_POLICY,
-		(int*) &g_oldttcpolicy, THREAD_TIME_CONSTRAINT_POLICY_COUNT );
-	TimeCritMutex->Unlock();
-
-	float fTimeCritLen = RageTimer::GetTimeSinceStart() - g_fStartedTimeCritAt;
-	if( fTimeCritLen > 0.1f )
-		LOG->Warn( "Time-critical section lasted for %f", fTimeCritLen );
-#endif
-}
-
 int64_t ArchHooks::GetMicrosecondsSinceStart( bool bAccurate )
 {
 	static uint64_t iStartTime = mach_absolute_time();
diff --git a/stepmania/src/arch/ArchHooks/ArchHooks_darwin.h b/stepmania/src/arch/ArchHooks/ArchHooks_darwin.h
index ba9ba21aac..e07fa88216 100644
--- a/stepmania/src/arch/ArchHooks/ArchHooks_darwin.h
+++ b/stepmania/src/arch/ArchHooks/ArchHooks_darwin.h
@@ -8,14 +8,8 @@ class ArchHooks_darwin : public ArchHooks
 {
 public:
 	ArchHooks_darwin();
-	~ArchHooks_darwin();
 	void DumpDebugInfo();
 	RString GetPreferredLanguage();
-	void EnterTimeCriticalSection();
-	void ExitTimeCriticalSection();
-	
-protected:
-	//RageMutex *TimeCritMutex;
 };
 
 #ifdef ARCH_HOOKS
@@ -26,7 +20,7 @@ protected:
 #endif /* ARCH_HOOKS_DARWIN_H */
 
 /*
- * (c) 2003-2005 Steve Checkoway
+ * (c) 2003-2006 Steve Checkoway
  * All rights reserved.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a