--- /dev/null
+#include "timer.h"
+
+#if defined(__APPLE__) && !defined(__unix__)
+#define __unix__
+#endif
+
+#ifdef __unix__
+#include <time.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#ifdef CLOCK_MONOTONIC
+unsigned long get_time_msec(void)
+{
+ struct timespec ts;
+ static struct timespec ts0;
+
+ clock_gettime(CLOCK_MONOTONIC, &ts);
+ if(ts0.tv_sec == 0 && ts0.tv_nsec == 0) {
+ ts0 = ts;
+ return 0;
+ }
+ return (ts.tv_sec - ts0.tv_sec) * 1000 + (ts.tv_nsec - ts0.tv_nsec) / 1000000;
+}
+#else /* no fancy POSIX clocks, fallback to good'ol gettimeofday */
+unsigned long get_time_msec(void)
+{
+ struct timeval tv;
+ static struct timeval tv0;
+
+ gettimeofday(&tv, 0);
+ if(tv0.tv_sec == 0 && tv0.tv_usec == 0) {
+ tv0 = tv;
+ return 0;
+ }
+ return (tv.tv_sec - tv0.tv_sec) * 1000 + (tv.tv_usec - tv0.tv_usec) / 1000;
+}
+#endif /* !posix clock */
+
+void sleep_msec(unsigned long msec)
+{
+ usleep(msec * 1000);
+}
+#endif
+
+#ifdef WIN32
+#include <windows.h>
+#pragma comment(lib, "winmm.lib")
+
+unsigned long get_time_msec(void)
+{
+ return timeGetTime();
+}
+
+void sleep_msec(unsigned long msec)
+{
+ Sleep(msec);
+}
+#endif
+
+double get_time_sec(void)
+{
+ return get_time_msec() / 1000.0f;
+}
+
+void sleep_sec(double sec)
+{
+ if(sec > 0.0f) {
+ sleep_msec(sec * 1000.0f);
+ }
+}