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.

5 files changed, 16 insertions, 2 deletions

diff --git a/configs/mingw32_defconfig b/configs/mingw32_defconfig
index 5d9d98eaf..af6ab53c3 100644
--- a/configs/mingw32_defconfig
+++ b/configs/mingw32_defconfig
@@ -251,7 +251,7 @@ CONFIG_CUT=y
 CONFIG_FEATURE_CUT_REGEX=y
 CONFIG_DATE=y
 CONFIG_FEATURE_DATE_ISOFMT=y
-# CONFIG_FEATURE_DATE_NANO is not set
+CONFIG_FEATURE_DATE_NANO=y
 CONFIG_FEATURE_DATE_COMPAT=y
 CONFIG_DD=y
 # CONFIG_FEATURE_DD_SIGNAL_HANDLING is not set
diff --git a/configs/mingw64_defconfig b/configs/mingw64_defconfig
index cd77b98b3..7b8de70f0 100644
--- a/configs/mingw64_defconfig
+++ b/configs/mingw64_defconfig
@@ -251,7 +251,7 @@ CONFIG_CUT=y
 CONFIG_FEATURE_CUT_REGEX=y
 CONFIG_DATE=y
 CONFIG_FEATURE_DATE_ISOFMT=y
-# CONFIG_FEATURE_DATE_NANO is not set
+CONFIG_FEATURE_DATE_NANO=y
 CONFIG_FEATURE_DATE_COMPAT=y
 CONFIG_DD=y
 # CONFIG_FEATURE_DD_SIGNAL_HANDLING is not set
diff --git a/include/mingw.h b/include/mingw.h
index 06fb3b289..8a9610898 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -276,6 +276,7 @@ struct timespec {
 time_t timegm(struct tm *tm);
 
 int nanosleep(const struct timespec *req, struct timespec *rem);
+int clock_gettime(clockid_t clockid, struct timespec *tp);
 
 /*
  * sys/stat.h
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