From a39a83665f07a0819a31ee2d1ab60210a67c47a2 Mon Sep 17 00:00:00 2001
From: Maarten Bosmans <mkbosmans@gmail.com>
Date: Tue, 18 Jan 2011 11:26:57 +0100
Subject: win32: Implement rtclock based on QueryPerformanceCounter

Also remove some unnecessary <time.h> headers.
---
 src/pulsecore/core-rtclock.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'src/pulsecore/core-rtclock.c')

diff --git a/src/pulsecore/core-rtclock.c b/src/pulsecore/core-rtclock.c
index a69b466f..ac2c097a 100644
--- a/src/pulsecore/core-rtclock.c
+++ b/src/pulsecore/core-rtclock.c
@@ -40,12 +40,20 @@
 #include <unistd.h>
 #endif
 
+#ifdef HAVE_WINDOWS_H
+#include <windows.h>
+#endif
+
 #include <pulse/timeval.h>
 #include <pulsecore/macro.h>
 #include <pulsecore/core-error.h>
 
 #include "core-rtclock.h"
 
+#ifdef OS_IS_WIN32
+static int64_t counter_freq = 0;
+#endif
+
 pa_usec_t pa_rtclock_age(const struct timeval *tv) {
     struct timeval now;
     pa_assert(tv);
@@ -88,6 +96,17 @@ struct timeval *pa_rtclock_get(struct timeval *tv) {
     tv->tv_usec = ts.tv_nsec / PA_NSEC_PER_USEC;
 
     return tv;
+#elif defined(OS_IS_WIN32)
+    if (counter_freq > 0) {
+        LARGE_INTEGER count;
+
+        pa_assert_se(QueryPerformanceCounter(&count));
+
+        tv->tv_sec = count.QuadPart / counter_freq;
+        tv->tv_usec = (count.QuadPart % counter_freq) * PA_USEC_PER_SEC / counter_freq;
+
+        return tv;
+    }
 #endif /* HAVE_CLOCK_GETTIME */
 
     return pa_gettimeofday(tv);
@@ -118,6 +137,11 @@ pa_bool_t pa_rtclock_hrtimer(void) {
     pa_assert_se(clock_getres(CLOCK_REALTIME, &ts) == 0);
     return ts.tv_sec == 0 && ts.tv_nsec <= (long) (PA_HRTIMER_THRESHOLD_USEC*PA_NSEC_PER_USEC);
 
+#elif defined(OS_IS_WIN32)
+
+    if (counter_freq > 0)
+        return counter_freq >= (int64_t) (PA_USEC_PER_SEC/PA_HRTIMER_THRESHOLD_USEC);
+
 #endif /* HAVE_CLOCK_GETTIME */
 
     return FALSE;
@@ -148,6 +172,12 @@ void pa_rtclock_hrtimer_enable(void) {
         }
     }
 
+#elif defined(OS_IS_WIN32)
+    LARGE_INTEGER freq;
+
+    pa_assert_se(QueryPerformanceFrequency(&freq));
+    counter_freq = freq.QuadPart;
+
 #endif
 }
 
-- 
cgit