Port: Add time.h compat for mingw

[babeltrace.git] / include / babeltrace / compat / time-internal.h

diff --git a/include/babeltrace/compat/time-internal.h b/include/babeltrace/compat/time-internal.h
new file mode 100644 (file)
index 0000000..c7ce44c
--- /dev/null
+++ b/include/babeltrace/compat/time-internal.h
@@ -0,0 +1,100 @@
+#ifndef _BABELTRACE_INCLUDE_COMPAT_TIME_H
+#define _BABELTRACE_INCLUDE_COMPAT_TIME_H
+
+/*
+ * babeltrace/compat/time.h
+ *
+ * Copyright (C) 2013 JP Ikaheimonen <jp_ikaheimonen@mentor.com>
+ *               2016 Michael Jeanson <mjeanson@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+
+#include <time.h>
+#include <stdlib.h>
+
+#ifdef __MINGW32__
+
+#include <string.h>
+
+/*
+ * The Windows version of the time functions use one common tm structure per
+ * thread which makes them thread-safe. Implement the POSIX _r variants by
+ * copying this to a user supplied struct.
+ */
+
+static inline
+struct tm *bt_gmtime_r(const time_t *timep, struct tm *result)
+{
+       struct tm *local_res;
+
+       if (!result) {
+               goto error;
+       }
+
+       local_res = gmtime(timep);
+       if (!local_res) {
+               result = NULL;
+               goto error;
+       }
+
+       memcpy(result, local_res, sizeof(struct tm));
+
+error:
+       return result;
+}
+
+static inline
+struct tm *bt_localtime_r(const time_t *timep, struct tm *result)
+{
+       struct tm *local_res;
+
+       if (!result) {
+               goto error;
+       }
+
+       local_res = localtime(timep);
+       if (!local_res) {
+               result = NULL;
+               goto error;
+       }
+
+       memcpy(result, local_res, sizeof(struct tm));
+
+error:
+       return result;
+}
+
+#else /* __MINGW32__ */
+
+static inline
+struct tm *bt_gmtime_r(const time_t *timep, struct tm *result)
+{
+       return gmtime_r(timep, result);
+}
+
+static inline
+struct tm *bt_localtime_r(const time_t *timep, struct tm *result)
+{
+       return localtime_r(timep, result);
+}
+
+#endif /* __MINGW32__ */
+#endif /* _BABELTRACE_INCLUDE_COMPAT_TIME_H */