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/* Ergo, version 3.8.2, a program for linear scaling electronic structure
* calculations.
* Copyright (C) 2023 Elias Rudberg, Emanuel H. Rubensson, Pawel Salek,
* and Anastasia Kruchinina.
*
* 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/>.
*
* Primary academic reference:
* Ergo: An open-source program for linear-scaling electronic structure
* calculations,
* Elias Rudberg, Emanuel H. Rubensson, Pawel Salek, and Anastasia
* Kruchinina,
* SoftwareX 7, 107 (2018),
* <http://dx.doi.org/10.1016/j.softx.2018.03.005>
*
* For further information about Ergo, see <http://www.ergoscf.org>.
*/
#if !defined(_ERGO_BARRIER_H_)
#define _ERGO_BARRIER_H_
/** @file barrier.h declares a pthread-compatible barrier. This is
to be used with older pthread implementations that do not provide
barriers. */
#if !defined(HAS_PTHREAD_BARRIER)
#ifdef __cplusplus
#define EXTERN_C extern "C"
#else
#define EXTERN_C extern
#endif
#if !defined(PTHREAD_BARRIER_SERIAL_THREAD)
#define PTHREAD_BARRIER_SERIAL_THREAD -1
#endif
typedef struct ergo_barrier {
pthread_mutex_t barrierMutex;
pthread_cond_t conditionVar;
int initCount;
int currCount;
int cycle;
} ergo_barrier_t;
EXTERN_C int ergo_barrier_init(ergo_barrier_t * barrier,
const void * attr_ignored,
unsigned int count);
EXTERN_C int ergo_barrier_destroy (ergo_barrier_t *__barrier);
EXTERN_C int ergo_barrier_wait (ergo_barrier_t *__barrier);
#else /* HAS_PTHREAD_BARRIER */
#define ergo_barrier_t pthread_barrier_t
#define ergo_barrier_init pthread_barrier_init
#define ergo_barrier_destroy pthread_barrier_destroy
#define ergo_barrier_wait pthread_barrier_wait
#endif /* HAS_PTHREAD_BARRIER */
#endif /* _ERGO_BARRIER_H_ */
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