[thirdparty/glibc.git] / sysdeps / htl / bits / types / struct___pthread_rwlock.h

/* rwlock type.  Generic version.
   Copyright (C) 2002-2021 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library;  if not, see
   <https://www.gnu.org/licenses/>.  */

#ifndef _BITS_TYPES_STRUCT___PTHREAD_RWLOCK_H
#define _BITS_TYPES_STRUCT___PTHREAD_RWLOCK_H

#include <bits/types/__pthread_spinlock_t.h>

/* User visible part of a rwlock.  If __held is not held and readers
   is 0, then the lock is unlocked.  If __held is held and readers is
   0, then the lock is held by a writer.  If __held is held and
   readers is greater than 0, then the lock is held by READERS
   readers.  */
struct __pthread_rwlock
{
  __pthread_spinlock_t __held;
  __pthread_spinlock_t __lock;
  int __readers;
  struct __pthread *__readerqueue;
  struct __pthread *__writerqueue;
  struct __pthread_rwlockattr *__attr;
  void *__data;
};

/* Initializer for a rwlock.  */
#define __PTHREAD_RWLOCK_INITIALIZER \
    { __PTHREAD_SPIN_LOCK_INITIALIZER, __PTHREAD_SPIN_LOCK_INITIALIZER, 0, 0, 0, 0, 0 }


#endif /* bits/types/struct___pthread_rwlock.h */
Commit	Line	Data
33574c17	1	/* rwlock type. Generic version.
2b778ceb	2	Copyright (C) 2002-2021 Free Software Foundation, Inc.
33574c17 ST	3	This file is part of the GNU C Library.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
ad2b41bf ST	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
33574c17 ST	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
ad2b41bf	13	Lesser General Public License for more details.
33574c17	14
ad2b41bf ST	15	You should have received a copy of the GNU Lesser General Public
ad2b41bf ST	16	License along with the GNU C Library; if not, see
5a82c748	17	<https://www.gnu.org/licenses/>. */
33574c17 ST	18
	19	#ifndef _BITS_TYPES_STRUCT___PTHREAD_RWLOCK_H
	20	#define _BITS_TYPES_STRUCT___PTHREAD_RWLOCK_H
	21
	22	#include <bits/types/__pthread_spinlock_t.h>
	23
	24	/* User visible part of a rwlock. If __held is not held and readers
	25	is 0, then the lock is unlocked. If __held is held and readers is
	26	0, then the lock is held by a writer. If __held is held and
	27	readers is greater than 0, then the lock is held by READERS
	28	readers. */
	29	struct __pthread_rwlock
	30	{
	31	__pthread_spinlock_t __held;
	32	__pthread_spinlock_t __lock;
	33	int __readers;
	34	struct __pthread *__readerqueue;
	35	struct __pthread *__writerqueue;
	36	struct __pthread_rwlockattr *__attr;
	37	void *__data;
	38	};
	39
	40	/* Initializer for a rwlock. */
	41	#define __PTHREAD_RWLOCK_INITIALIZER \
	42	{ __PTHREAD_SPIN_LOCK_INITIALIZER, __PTHREAD_SPIN_LOCK_INITIALIZER, 0, 0, 0, 0, 0 }
	43
	44
	45	#endif /* bits/types/struct___pthread_rwlock.h */