include/babeltrace/compat/time-internal.h

   1 #ifndef _BABELTRACE_INCLUDE_COMPAT_TIME_H
   2 #define _BABELTRACE_INCLUDE_COMPAT_TIME_H
   3
   4 /*
   5  * babeltrace/compat/time.h
   6  *
   7  * Copyright (C) 2013 JP Ikaheimonen <jp_ikaheimonen@mentor.com>
   8  *               2016 Michael Jeanson <mjeanson@efficios.com>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  26  * SOFTWARE.
  27  */
  28
  29
  30 #include <time.h>
  31 #include <stdlib.h>
  32
  33 #ifdef __MINGW32__
  34
  35 #include <string.h>
  36
  37 /*
  38  * The Windows version of the time functions use one common tm structure per
  39  * thread which makes them thread-safe. Implement the POSIX _r variants by
  40  * copying this to a user supplied struct.
  41  */
  42
  43 static inline
  44 struct tm *bt_gmtime_r(const time_t *timep, struct tm *result)
  45 {
  46         struct tm *local_res;
  47
  48         if (!result) {
  49                 goto error;
  50         }
  51
  52         local_res = gmtime(timep);
  53         if (!local_res) {
  54                 result = NULL;
  55                 goto error;
  56         }
  57
  58         memcpy(result, local_res, sizeof(struct tm));
  59
  60 error:
  61         return result;
  62 }
  63
  64 static inline
  65 struct tm *bt_localtime_r(const time_t *timep, struct tm *result)
  66 {
  67         struct tm *local_res;
  68
  69         if (!result) {
  70                 goto error;
  71         }
  72
  73         local_res = localtime(timep);
  74         if (!local_res) {
  75                 result = NULL;
  76                 goto error;
  77         }
  78
  79         memcpy(result, local_res, sizeof(struct tm));
  80
  81 error:
  82         return result;
  83 }
  84
  85 #else /* __MINGW32__ */
  86
  87 static inline
  88 struct tm *bt_gmtime_r(const time_t *timep, struct tm *result)
  89 {
  90         return gmtime_r(timep, result);
  91 }
  92
  93 static inline
  94 struct tm *bt_localtime_r(const time_t *timep, struct tm *result)
  95 {
  96         return localtime_r(timep, result);
  97 }
  98
  99 #endif /* __MINGW32__ */
 100 #endif /* _BABELTRACE_INCLUDE_COMPAT_TIME_H */