Changeset 33155 in vbox for trunk/src/VBox/Runtime/r0drv/linux

Timestamp:

Oct 15, 2010 12:07:44 PM (14 years ago)

Author:

vboxsync

Message:

IPRT: Added RTSemEventGetResolution and RTSemEventMultiGetResolution to r0drv.

Location:

trunk/src/VBox/Runtime/r0drv/linux

Files:

• semevent-r0drv-linux.c (modified) (1 diff)
• semeventmulti-r0drv-linux.c (modified) (1 diff)
• waitqueue-r0drv-linux.h (modified) (3 diffs)

trunk/src/VBox/Runtime/r0drv/linux/semevent-r0drv-linux.c

@@ -256 +256 @@
 RT_EXPORT_SYMBOL(RTSemEventWaitExDebug);
 
+
+RTDECL(uint32_t) RTSemEventGetResolution(void)
+{
+    return rtR0SemLnxWaitGetResolution();
+}
+RT_EXPORT_SYMBOL(RTSemEventGetResolution);
+

trunk/src/VBox/Runtime/r0drv/linux/semeventmulti-r0drv-linux.c

@@ -321 +321 @@
 RT_EXPORT_SYMBOL(RTSemEventMultiWaitExDebug);
 
+
+RTDECL(uint32_t) RTSemEventMultiGetResolution(void)
+{
+    return rtR0SemLnxWaitGetResolution();
+}
+RT_EXPORT_SYMBOL(RTSemEventMultiGetResolution);
+

trunk/src/VBox/Runtime/r0drv/linux/waitqueue-r0drv-linux.h

@@ -35 +35 @@
 #include <iprt/string.h>
 #include <iprt/time.h>
+
+/** The resolution (nanoseconds) specified when using
+ *  schedule_hrtimeout_range. */
+#define RTR0SEMLNXWAIT_RESOLUTION   50000
 
 
@@ -213 +217 @@
     else if (pWait->fHighRes)
     {
-        int rc = schedule_hrtimeout(&pWait->u.KtTimeout, HRTIMER_MODE_ABS);
+        int rc = schedule_hrtimeout_range(&pWait->u.KtTimeout, HRTIMER_MODE_ABS, RTR0SEMLNXWAIT_RESOLUTION);
         if (!rc)
             pWait->fTimedOut = true;
@@ -265 +269 @@
 
 
-#endif
-
+/**
+ * Gets the max resolution of the timeout machinery.
+ *
+ * @returns Resolution specified in nanoseconds.
+ */
+DECLINLINE(uint32_t) rtR0SemLnxWaitGetResolution(void)
+{
+#ifdef IPRT_LINUX_HAS_HRTIMER
+    return RTR0SEMLNXWAIT_RESOLUTION;
+#else
+    return 1000000000 / HZ; /* ns */
+#endif
+}
+
+#endif
+