benchmark.c

commit 86e0e5f3d9ec142d140c6d718564f8d7240a3994
parent 84c52cee593edc914e08f09a5c5ff215a7be0ca3
Author: finwo <finwo@pm.me>
Date:   Sun, 18 Feb 2024 23:15:36 +0100

Untested windows support

Diffstat:
M
src/benchmark.c
 | 
27
+++++++++++++++++++++++++++

1 file changed, 27 insertions(+), 0 deletions(-)
diff --git a/src/benchmark.c b/src/benchmark.c
@@ -2,7 +2,34 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+
+#if defined(_WIN32) || defined(_WIN64)
+#include <Windows.h>
+#include <winsock2.h> // For struct_timeval
+
+int gettimeofday(struct timeval * tp, struct timezone * tzp) {
+  // Note: some broken versions only have 8 trailing zero's, the correct epoch has 9 trailing zero's
+  // This magic number is the number of 100 nanosecond intervals since January 1, 1601 (UTC)
+  // until 00:00:00 January 1, 1970 
+  static const uint64_t EPOCH = ((uint64_t) 116444736000000000ULL);
+
+  SYSTEMTIME  system_time;
+  FILETIME    file_time;
+  uint64_t    time;
+
+  GetSystemTime( &system_time );
+  SystemTimeToFileTime( &system_time, &file_time );
+  time =  ((uint64_t)file_time.dwLowDateTime )      ;
+  time += ((uint64_t)file_time.dwHighDateTime) << 32;
+
+  tp->tv_sec  = (long) ((time - EPOCH) / 10000000L);
+  tp->tv_usec = (long) (system_time.wMilliseconds * 1000);
+  return 0;
+}
+
+#else // _WIN32 || _WIN64
 #include <sys/time.h>
+#endif
 
 #include "benchmark.h"