X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fpbd%2Fcpus.cc;h=fb94b475de69735c8990f1f85dc50c619b8929d0;hb=f5f89d8c7e7e0cb6dad8c3f255b3871ef99a78cf;hp=77b95a455dce7898ec55b38eaae0b48f725b5c12;hpb=77c578f21c691206806d65c2dd8cd1f69c4ac7da;p=ardour.git

diff --git a/libs/pbd/cpus.cc b/libs/pbd/cpus.cc
index 77b95a455d..fb94b475de 100644
--- a/libs/pbd/cpus.cc
+++ b/libs/pbd/cpus.cc
@@ -28,10 +28,16 @@
 #include <stddef.h>
 #include <sys/types.h>
 #include <sys/sysctl.h>
+#elif defined(PLATFORM_WINDOWS)
+#include <windows.h>
 #endif
 
 #include "pbd/cpus.h"
 
+#if defined(COMPILER_MSVC) && !defined(PTW32_VERSION)
+#include <ardourext/pthread.h>  // Gets us 'PTW32_VERSION'
+#endif
+
 uint32_t
 hardware_concurrency()
 {
@@ -40,10 +46,14 @@ hardware_concurrency()
 #elif defined(__APPLE__) || defined(__FreeBSD__)
         int count;
         size_t size=sizeof(count);
-        return sysctlbyname("hw.ncpu",&count,&size,NULL,0)?0:count;
+        return sysctlbyname("hw.physicalcpu",&count,&size,NULL,0)?0:count;
 #elif defined(HAVE_UNISTD) && defined(_SC_NPROCESSORS_ONLN)
         int const count=sysconf(_SC_NPROCESSORS_ONLN);
         return (count>0)?count:0;
+#elif defined(PLATFORM_WINDOWS)
+		SYSTEM_INFO sys_info;
+		GetSystemInfo( &sys_info );
+		return sys_info.dwNumberOfProcessors;
 #else
         return 0;
 #endif