add functions to get monotonic timestamps (needs kernel 2.6)

git-svn-id: file:///home/bas/coolstream_public_svn/THIRDPARTY/applications/neutrino-experimental@1251 e54a6e83-5905-42d5-8d5c-058d10e6a962

src/driver/Makefile.am

@@ -16,6 +16,7 @@ INCLUDES = \
 noinst_LIBRARIES = libneutrino_driver.a libneutrino_driver_netfile.a
 
 libneutrino_driver_a_SOURCES = \
+	abstime.c \
 	encoding.cpp \
 	fontrenderer.cpp \
 	framebuffer.cpp \

src/driver/abstime.c

@@ -0,0 +1,27 @@
+#include <stdio.h> /* for perror */
+#include <time.h>
+
+time_t time_monotonic_ms(void)
+{
+	struct timespec t;
+	time_t ret;
+	if (clock_gettime(CLOCK_MONOTONIC, &t))
+	{
+		perror("time_monotonic_ms clock_gettime");
+		return -1;
+	}
+	ret = (t.tv_sec & 0x01FFFFF) * 1000; /* avoid overflow */
+	ret += t.tv_nsec / 1000000;
+	return ret;
+}
+
+time_t time_monotonic(void)
+{
+	struct timespec t;
+	if (clock_gettime(CLOCK_MONOTONIC, &t))
+	{
+		perror("time_monotonic clock_gettime");
+		return -1;
+	}
+	return t.tv_sec;
+}

src/driver/abstime.h

@@ -0,0 +1,12 @@
+#ifndef _ABS_TIME_H_
+#define _ABS_TIME_H_
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+extern time_t time_monotonic_ms(void);
+extern time_t time_monotonic(void);
+#ifdef __cplusplus
+}
+#endif
+#endif