X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fpbd%2Fcpus.cc;h=fed7725b766d819f33aef2148e3030edbc25a9db;hb=bf2d9e7a342dbb4d06b258e9d22cc4915260914c;hp=48b919cd966fb55b7da9eaad7c061b15930bba16;hpb=eb5096bfc7945cb30abb35ae2e1320e687966f89;p=ardour.git

diff --git a/libs/pbd/cpus.cc b/libs/pbd/cpus.cc
index 48b919cd96..fed7725b76 100644
--- a/libs/pbd/cpus.cc
+++ b/libs/pbd/cpus.cc
@@ -22,29 +22,51 @@
 #include "libpbd-config.h"
 #endif
 
+#include <stdlib.h>
+
 #ifdef __linux__
 #include <unistd.h>
 #elif defined(__APPLE__) || defined(__FreeBSD__)
 #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()
 {
+	if (getenv("CONCURRENCY")) {
+		int c = atoi (getenv("CONCURRENCY"));
+		if (c > 0) {
+			return c;
+		}
+	}
 #if defined(PTW32_VERSION) || defined(__hpux)
-        return pthread_num_processors_np();
-#elif defined(__APPLE__) || defined(__FreeBSD__)
-        int count;
-        size_t size=sizeof(count);
-        return sysctlbyname("hw.physicalcpu",&count,&size,NULL,0)?0:count;
+	return pthread_num_processors_np();
+#elif defined(__APPLE__)
+	int count;
+	size_t size=sizeof(count);
+	return sysctlbyname("hw.physicalcpu",&count,&size,NULL,0)?0:count;
+#elif defined(__FreeBSD__)
+	int count;
+	size_t size=sizeof(count);
+	return sysctlbyname("hw.ncpu",&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;
+	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;
+	return 0;
 #endif
 }