include/babeltrace/compat/time-internal.h

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