Commit daf27eb9 authored by David Cole's avatar David Cole
Browse files

ENH: Merge changes from main tree into VTK-5-0 branch. (cvs -q up -j1.50...

ENH: Merge changes from main tree into VTK-5-0 branch. (cvs -q up -j1.50 -j1.51 Common/vtkMultiThreader.cxx)
parent f9bd772d
......@@ -18,7 +18,7 @@
#include "vtkObjectFactory.h"
#include "vtkWindows.h"
vtkCxxRevisionMacro(vtkMultiThreader, "1.50");
vtkCxxRevisionMacro(vtkMultiThreader, "");
// These are the includes necessary for multithreaded rendering on an SGI
......@@ -42,7 +42,8 @@ typedef vtkThreadFunctionType vtkExternCThreadFunctionType;
#ifdef __APPLE__
#include <Carbon/Carbon.h>
#include <sys/types.h>
#include <sys/sysctl.h>
// Initialize static member that controls global maximum number of threads
......@@ -99,9 +100,16 @@ int vtkMultiThreader::GetGlobalDefaultNumberOfThreads()
#ifdef __APPLE__
// MPProcessors returns the physical number of processors present
// MPProcessorsScheduled returns number of active processors
num = MPProcessors();
// Use sysctl() to determine the number of CPUs. This is prefered
// over MPProcessors() because it doesn't require CoreServices
// (which is only available in 32bit on Mac OS X 10.4)
int mib[2] = {CTL_HW, HW_NCPU};
size_t dataLen = sizeof(int); // 'num' is an 'int'
int result = sysctl(mib, 2, &num, &dataLen, NULL, 0);
if (result == -1)
num = 1;
#ifdef _WIN32
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