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/*
Copyright (C) 2008 Andreas Baumann <abaumann@yahoo.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "port/time.h"
#if !defined HAVE_LOCALTIME_R || defined TEST_LOCALTIME_R
#if defined HAVE_PTHREADS
#include <pthread.h> /* for pthread_X */
#include "port/stdbool.h" /* for bool */
#include "port/string.h" /* for memcpy */
struct tm *wolf_port_localtime_r( const time_t *timep, struct tm *result ) {
static pthread_mutex_t mutex;
static bool first = true;
struct tm *local_result;
if( first ) {
pthread_mutex_init( &mutex, NULL );
first = false;
}
pthread_mutex_lock( &mutex );
local_result = localtime( timep );
if( local_result != NULL ) {
memcpy( result, local_result, sizeof( struct tm ) );
}
pthread_mutex_unlock( &mutex );
return ( local_result != NULL ) ? result : NULL;
}
#else /* defined HAVE_PTHREADS */
#if defined _WIN32
/* localtime on Windows uses thread-local data to make things thread-safe,
* see MinGW mailing-lists. So we can safely copy the local buffer to the
* result without locking.
* TODO: needs testing of the hypothesis!
*/
#include "port/string.h" /* for memcpy */
struct tm *wolf_port_localtime_r( const time_t *timep, struct tm *result ) {
struct tm *local_result;
local_result = localtime( timep );
if( local_result != NULL ) {
memcpy( result, local_result, sizeof( struct tm ) );
}
return ( local_result != NULL ) ? result : NULL;
}
#else
#error no pthreads, port localtime_r differently!
#endif /* defined _WIN32 */
#endif /* defined HAVE_PTHREADS */
#endif /* !defined HAVE_LOCALTIME_R || defined TEST_LOCALTIME_R */
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