Detlef Riekenberg : ntdll: Read the current processor with the __NR_getcpu syscall.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 979099a441682c99ee0c1ee1fab5e1de635a579c
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=979099a441682c99ee0c1ee1fab5e1de635a579c

Author: Detlef Riekenberg <wine.dev at web.de>
Date:   Fri May 18 01:03:31 2012 +0200

ntdll: Read the current processor with the __NR_getcpu syscall.

---

 dlls/ntdll/thread.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/dlls/ntdll/thread.c b/dlls/ntdll/thread.c
index b34e279..881d961 100644
--- a/dlls/ntdll/thread.c
+++ b/dlls/ntdll/thread.c
@@ -30,6 +30,9 @@
 #ifdef HAVE_SYS_TIMES_H
 #include <sys/times.h>
 #endif
+#ifdef HAVE_SYS_SYSCALL_H
+#include <sys/syscall.h>
+#endif
 
 #define NONAMELESSUNION
 #include "ntstatus.h"
@@ -1184,6 +1187,11 @@ ULONG WINAPI NtGetCurrentProcessorNumber(void)
 {
     ULONG processor;
 
+#if defined(__linux__) && defined(__NR_getcpu)
+    int res = syscall(__NR_getcpu, &processor);
+    if (res != -1) return processor;
+#endif
+
     if (NtCurrentTeb()->Peb->NumberOfProcessors > 1)
     {
         ULONG_PTR thread_mask, processor_mask;