win32: add gmtime_r()

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>

2 files changed, 8 insertions, 1 deletions

diff --git a/include/mingw.h b/include/mingw.h
index b946d3d81..27d1135d3 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -221,7 +221,7 @@ NOIMPL(waitpid,pid_t pid UNUSED_PARAM, int *status UNUSED_PARAM, unsigned option
 /*
  * time.h
  */
-IMPL(gmtime_r,struct tm *,NULL,const time_t *timep UNUSED_PARAM, struct tm *result UNUSED_PARAM);
+struct tm *gmtime_r(const time_t *timep, struct tm *result);
 IMPL(localtime_r,struct tm *,NULL,const time_t *timep UNUSED_PARAM, struct tm *result UNUSED_PARAM);
 IMPL(strptime,char*,NULL,const char *s UNUSED_PARAM, const char *format UNUSED_PARAM, struct tm *tm UNUSED_PARAM);
 
diff --git a/win32/mingw.c b/win32/mingw.c
index 09d746f21..1a476651a 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -62,3 +62,10 @@ int pipe(int filedes[2])
                 return -1;
         return 0;
 }
+
+struct tm *gmtime_r(const time_t *timep, struct tm *result)
+{
+        /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
+        memcpy(result, gmtime(timep), sizeof(struct tm));
+        return result;
+}