Fix timing functions for various platforms.

Core/CMakeLists.txt

@@ -12,8 +12,11 @@ SET( HEADERS
 
 # Make sure to add the appropriate stopwatch files...
 SET( HEADERS	${HEADERS} "src/StopWatch.h" )
-IF( MSVC )
+
+IF( WIN32 )
 	SET( SOURCES ${SOURCES} "src/StopWatchWin32.cpp" )
+ELSEIF( APPLE )
+	SET( SOURCES ${SOURCES} "src/StopWatchOSX.cpp" )
 ELSE()
 	SET( SOURCES ${SOURCES} "src/StopWatchUnix.cpp" )
 ENDIF()

Core/src/StopWatch.h

@@ -15,15 +15,20 @@
 //
 //--------------------------------------------------------------------------------------
 
-#pragma once
-
-#include "TexCompTypes.h"
+// Forward declare the private implementation of the class that will actually implement
+// the timing features. This class is defined in each module depending on the platform...
+class StopWatchImpl;
 
 // A simple stopwatch class using Windows' high-resolution performance counters.
 class StopWatch
 {
 public:
 	StopWatch();
+	StopWatch(const StopWatch &);
+
+	~StopWatch();
+
+	StopWatch &operator=(const StopWatch &);
 
 	void Start();
 	void Stop();
@@ -34,8 +39,5 @@ public:
 	double TimeInMicroseconds() const;
 
 private:
-	uint64 frequency;
-	uint64 start;
-	uint64 stop;
-	int32_ptr affinityMask;
+	StopWatchImpl *impl;
 };

Core/src/StopWatchOSX.cpp

@@ -0,0 +1,67 @@
+#include "StopWatch.h"
+#include "TexCompTypes.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <mach/mach_time.h>
+
+class StopWatchImpl {
+public:
+  uint64 start;
+  
+  double resolution;
+  double duration;
+
+  StopWatchImpl() {
+    mach_timebase_info_data_t info;
+    mach_timebase_info(&info);
+
+    resolution = double(info.numer) / double(info.denom);
+    resolution *= 1e-9;
+  }
+};
+
+StopWatch::StopWatch(const StopWatch &other) {
+  impl = new StopWatchImpl();
+  memcpy(impl, other.impl, sizeof(StopWatchImpl));
+}
+
+StopWatch &StopWatch::operator=(const StopWatch &other) {
+  if(impl) {
+    delete impl;
+  }
+  impl = new StopWatchImpl();
+  memcpy(impl, other.impl, sizeof(StopWatchImpl));
+}
+
+StopWatch::~StopWatch() {
+  delete impl;
+}
+
+StopWatch::StopWatch() : impl(new StopWatchImpl) {
+  Reset();
+}
+
+void StopWatch::Start() {
+  impl->start = mach_absolute_time();
+}
+
+void StopWatch::Stop() {
+  impl->duration = impl->resolution * (double(mach_absolute_time()) - impl->start);
+}
+
+void StopWatch::Reset() {
+  impl->start = impl->duration = 0.0;
+}
+
+double StopWatch::TimeInSeconds() const {
+  return impl->duration;
+}
+
+double StopWatch::TimeInMilliseconds() const {
+  return impl->duration * 1000;
+}
+	
+double StopWatch::TimeInMicroseconds() const {
+  return impl->duration * 1000000;
+}

Core/src/StopWatchUnix.cpp

@@ -1,29 +1,62 @@
 #include "StopWatch.h"
+#include "TexCompTypes.h"
 
-StopWatch::StopWatch() {
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
 
+class StopWatchImpl {
+public:
+  timespec ts;
+
+  double timer;
+  double duration;
+};
+
+StopWatch::StopWatch(const StopWatch &other) {
+  impl = new StopWatchImpl();
+  memcpy(impl, other.impl, sizeof(StopWatchImpl));
+}
+
+StopWatch &StopWatch::operator=(const StopWatch &other) {
+  if(impl) {
+    delete impl;
+  }
+  impl = new StopWatchImpl();
+  memcpy(impl, other.impl. sizeof(StopWatchImpl));
+}
+
+StopWatch::~StopWatch() {
+  delete impl;
+}
+
+StopWatch::StopWatch() : impl(new StopWatchImpl) {
+  Reset();
 }
 
 void StopWatch::Start() {
-
+  clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(impl->ts));
+  impl->timer = double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec);
 }
 
 void StopWatch::Stop() {
-
+  clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(impl->ts));
+  impl->duration = -(impl->timer) + (double(ts.tv_sec) + 1e-9 * double(ts.tv_nsec));
 }
 
 void StopWatch::Reset() {
-
+  impl->timer = impl->duration = 0.0;
+  memset(impl->ts, 0, sizeof(timespec));
 }
 
 double StopWatch::TimeInSeconds() const {
-
+  return impl->duration;
 }
 
 double StopWatch::TimeInMilliseconds() const {
-
+  return impl->duration * 1000;
 }
 	
 double StopWatch::TimeInMicroseconds() const {
-
+  return impl->duration * 1000000;
 }

Core/src/StopWatchWin32.cpp

@@ -16,91 +16,113 @@
 //--------------------------------------------------------------------------------------
 
 #include "StopWatch.h"
+#include "TexCompTypes.h"
+
 #include <cassert>
 
-// Initialize member variables.
-StopWatch::StopWatch() :
-	frequency(0),
-	start(0),
-	stop(0),
-	affinityMask(0)
-{
-	// Initialize the performance counter frequency.
-	LARGE_INTEGER perfQuery;
-	BOOL supported = QueryPerformanceFrequency(&perfQuery);
-	assert(supported == TRUE);
-	this->frequency = perfQuery.QuadPart;
+class StopWatchImpl {
+  uint64 frequency;
+  uint64 start;
+  uint64 stop;
+  uintptr affinityMask;
+
+  StopWatchImpl() :
+    start(0), stop(0), affinityMask(0)
+  {
+    // Initialize the performance counter frequency.
+    LARGE_INTEGER perfQuery;
+    BOOL supported = QueryPerformanceFrequency(&perfQuery);
+    assert(supported == TRUE);
+    this->frequency = perfQuery.QuadPart;
+  }
+};
+
+StopWatch::StopWatch(const StopWatch &other) {
+  impl = new StopWatchImpl();
+  memcpy(impl, other.impl, sizeof(StopWatchImpl));
+}
+
+StopWatch &StopWatch::operator=(const StopWatch &other) {
+  if(impl) {
+    delete impl;
+  }
+  impl = new StopWatchImpl();
+  memcpy(impl, other.impl. sizeof(StopWatchImpl));
+}
+
+StopWatch::~StopWatch() {
+  delete impl;
 }
 
 // Start the stopwatch.
 void StopWatch::Start()
 {
-	// MSDN recommends setting the thread affinity to avoid bugs in the BIOS and HAL.
-	// Create an affinity mask for the current processor.
-	affinityMask = (DWORD_PTR)1 << GetCurrentProcessorNumber();
-	HANDLE currThread = GetCurrentThread();
-	DWORD_PTR prevAffinityMask = SetThreadAffinityMask(currThread, affinityMask);
-	assert(prevAffinityMask != 0);
+  // MSDN recommends setting the thread affinity to avoid bugs in the BIOS and HAL.
+  // Create an affinity mask for the current processor.
+  impl->affinityMask = (DWORD_PTR)1 << GetCurrentProcessorNumber();
+  HANDLE currThread = GetCurrentThread();
+  DWORD_PTR prevAffinityMask = SetThreadAffinityMask(currThread, impl->affinityMask);
+  assert(prevAffinityMask != 0);
 
-	// Query the performance counter.
-	LARGE_INTEGER perfQuery;
-	BOOL result = QueryPerformanceCounter(&perfQuery);
-    assert(result);
-    start = perfQuery.QuadPart;
+  // Query the performance counter.
+  LARGE_INTEGER perfQuery;
+  BOOL result = QueryPerformanceCounter(&perfQuery);
+  assert(result);
+  impl->start = perfQuery.QuadPart;
 
-	// Restore the thread's affinity mask.
-	prevAffinityMask = SetThreadAffinityMask(currThread, prevAffinityMask);
-	assert(prevAffinityMask != 0);
+  // Restore the thread's affinity mask.
+  prevAffinityMask = SetThreadAffinityMask(currThread, prevAffinityMask);
+  assert(prevAffinityMask != 0);
 }
 
 // Stop the stopwatch.
 void StopWatch::Stop()
 {
-	// MSDN recommends setting the thread affinity to avoid bugs in the BIOS and HAL.
-	// Use the affinity mask that was created in the Start function.
-	HANDLE currThread = GetCurrentThread();
-	DWORD_PTR prevAffinityMask = SetThreadAffinityMask(currThread, affinityMask);
-	assert(prevAffinityMask != 0);
+  // MSDN recommends setting the thread affinity to avoid bugs in the BIOS and HAL.
+  // Use the affinity mask that was created in the Start function.
+  HANDLE currThread = GetCurrentThread();
+  DWORD_PTR prevAffinityMask = SetThreadAffinityMask(currThread, impl->affinityMask);
+  assert(prevAffinityMask != 0);
 
-	// Query the performance counter.
-	LARGE_INTEGER perfQuery;
-	BOOL result = QueryPerformanceCounter(&perfQuery);
-    assert(result);
-    stop = perfQuery.QuadPart;
+  // Query the performance counter.
+  LARGE_INTEGER perfQuery;
+  BOOL result = QueryPerformanceCounter(&perfQuery);
+  assert(result);
+  impl->stop = perfQuery.QuadPart;
 
-	// Restore the thread's affinity mask.
-	prevAffinityMask = SetThreadAffinityMask(currThread, prevAffinityMask);
-	assert(prevAffinityMask != 0);
+  // Restore the thread's affinity mask.
+  prevAffinityMask = SetThreadAffinityMask(currThread, prevAffinityMask);
+  assert(prevAffinityMask != 0);
 }
 
 // Reset the stopwatch.
 void StopWatch::Reset()
 {
-	start = 0;
-	stop = 0;
-	affinityMask = 0;
+  impl->start = 0;
+  impl->stop = 0;
+  impl->affinityMask = 0;
 }
 
 // Get the elapsed time in seconds.
 double StopWatch::TimeInSeconds() const
 {
-	// Return the elapsed time in seconds.
-	assert((stop - start) > 0);
-	return double(stop - start) / double(frequency);
+  // Return the elapsed time in seconds.
+  assert((impl->stop - impl->start) > 0);
+  return double(impl->stop - impl->start) / double(frequency);
 }
 
 // Get the elapsed time in milliseconds.
 double StopWatch::TimeInMilliseconds() const
 {
-	// Return the elapsed time in milliseconds.
-	assert((stop - start) > 0);
-	return double(stop - start) / double(frequency) * 1000.0;
+  // Return the elapsed time in milliseconds.
+  assert((impl->stop - impl->start) > 0);
+  return double(impl->stop - impl->start) / double(frequency) * 1000.0;
 }
 
 // Get the elapsed time in microseconds.
 double StopWatch::TimeInMicroseconds() const
 {
-	// Return the elapsed time in microseconds.
-	assert((stop - start) > 0);
-	return double(stop - start) / double(frequency) * 1000000.0;
+  // Return the elapsed time in microseconds.
+  assert((impl->stop - impl->start) > 0);
+  return double(impl->stop - impl->start) / double(impl->frequency) * 1000000.0;
 }