Changeset 1049 in vbox for trunk

Timestamp:

Feb 23, 2007 4:54:37 PM (18 years ago)

Author:

vboxsync

Message:

supdrvOSGetCPUCount on win32 and darwin.

Location:

trunk/src/VBox/HostDrivers/Support

Files:

• SUPDRVShared.c (modified) (2 diffs)
• win32/SUPDrv-win32.cpp (modified) (1 diff)

trunk/src/VBox/HostDrivers/Support/SUPDRVShared.c

@@ -4065 +4065 @@
 static SUPGIPMODE supdrvGipDeterminTscMode(void)
 {
+#ifndef USE_NEW_OS_INTERFACE
     if (supdrvOSGetCPUCount() > 1)
     {
@@ -4084 +4085 @@
         }
     }
+#endif
     return SUPGIPMODE_SYNC_TSC;
 }

trunk/src/VBox/HostDrivers/Support/win32/SUPDrv-win32.cpp

@@ -1076 +1076 @@
 
 
+/**
+ * Get the current CPU count.
+ * @returns Number of cpus.
+ */
+unsigned VBOXCALL supdrvOSGetCPUCount(void)
+{
+    KAFFINITY Mask = KeQueryActiveProcessors();
+    unsigned cCpus = 0;
+    unsigned iBit;
+    for (iBit = 0; iBit < sizeof(Mask) * 8; iBit++)
+        if (Mask & (1 << iBit))
+            cCpus++;
+    if (cCpus == 0) /* paranoia */
+        cCpus = 1; 
+    return cCpus;
+}
+
 
 /**