date: enable FEATURE_DATE_NANO

Provide a WIN32 implementation of clock_gettime(2), though only
with support for CLOCK_REALTIME.  This makes it possible to enable
FEATURE_DATE_NANO which adds support for the %N date format.

MinGW-w64 has clock_gettime(2) but it's in the winpthreads library
and we don't want to bother with that.

2 files changed, 13 insertions, 0 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index 91c52b75c..2de07122e 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -927,6 +927,19 @@ int gettimeofday(struct timeval *tv, void *tz UNUSED_PARAM)
         return 0;
 }
 
+int clock_gettime(clockid_t clockid, struct timespec *tp)
+{
+        FILETIME ft;
+
+        if (clockid != CLOCK_REALTIME) {
+                errno = ENOSYS;
+                return -1;
+        }
+        GetSystemTimeAsFileTime(&ft);
+        *tp = filetime_to_timespec(&ft);
+        return 0;
+}
+
 int pipe(int filedes[2])
 {
         if (_pipe(filedes, PIPE_BUF, 0) < 0)
diff --git a/win32/sys/syscall.h b/win32/sys/syscall.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/win32/sys/syscall.h