diff options
| -rw-r--r-- | rts/posix/OSThreads.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/rts/posix/OSThreads.c b/rts/posix/OSThreads.c index 84b111fcb7..d4d4382134 100644 --- a/rts/posix/OSThreads.c +++ b/rts/posix/OSThreads.c @@ -23,6 +23,11 @@ #include <string.h> #endif +#if defined(darwin_HOST_OS) +#include <sys/types.h> +#include <sys/sysctl.h> +#endif + #if !defined(HAVE_PTHREAD_H) #error pthreads.h is required for the threaded RTS on Posix platforms #endif @@ -196,12 +201,16 @@ nat getNumberOfProcessors (void) { static nat nproc = 0; + size_t size = sizeof(nat); if (nproc == 0) { #if defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN) nproc = sysconf(_SC_NPROCESSORS_ONLN); #elif defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_CONF) nproc = sysconf(_SC_NPROCESSORS_CONF); +#elif defined(darwin_HOST_OS) + if(0 != sysctlbyname("hw.ncpu",&nproc,&size,NULL,0)) + nproc = 1; #else nproc = 1; #endif |