eal/windows: add clock function

Add clock_gettime() on Windows in rte_os_shim.h.

Signed-off-by: Jie Zhou <jizh@linux.microsoft.com>
Acked-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>

diff --git a/lib/eal/windows/include/rte_os_shim.h b/lib/eal/windows/include/rte_os_shim.h
index 824d974..3361974 100644 (file)
--- a/lib/eal/windows/include/rte_os_shim.h
+++ b/lib/eal/windows/include/rte_os_shim.h
@@ -77,4 +77,37 @@ rte_timespec_get(struct timespec *now, int base)
 
 #endif /* RTE_TOOLCHAIN_GCC */
 
+/* Identifier for system-wide realtime clock. */
+#define CLOCK_REALTIME                  0
+/* Monotonic system-wide clock. */
+#define CLOCK_MONOTONIC                 1
+
+typedef int clockid_t;
+
+static inline int
+rte_clock_gettime(clockid_t clock_id, struct timespec *tp)
+{
+       const int NS_PER_SEC = 1E9;
+       LARGE_INTEGER pf, pc;
+       LONGLONG nsec;
+
+       switch (clock_id) {
+       case CLOCK_REALTIME:
+               if (timespec_get(tp, TIME_UTC) != TIME_UTC)
+                       return -1;
+               return 0;
+       case CLOCK_MONOTONIC:
+               QueryPerformanceFrequency(&pf);
+               QueryPerformanceCounter(&pc);
+
+               nsec = pc.QuadPart * NS_PER_SEC / pf.QuadPart;
+               tp->tv_sec = nsec / NS_PER_SEC;
+               tp->tv_nsec = nsec - tp->tv_sec * NS_PER_SEC;
+               return 0;
+       default:
+               return -1;
+       }
+}
+#define clock_gettime(clock_id, tp) rte_clock_gettime(clock_id, tp)
+
 #endif /* _RTE_OS_SHIM_ */