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/* Definitions for thread support.
 *
 * JC, 9/5/94
 * 30/7/99 RP, JC
 *	- reworked for posix/solaris threads
 * 28/9/99 JC
 *	- restructured, made part of public API
 */
/*
	This file is part of VIPS.
	VIPS 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 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 Lesser General Public License for more details.
	You should have received a copy of the GNU Lesser General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	02110-1301  USA
 */
/*
	These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
 */
#ifndef VIPS_SEMAPHORE_H
#define VIPS_SEMAPHORE_H
#include <glib.h>
#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/
/* Implement our own semaphores.
 */
typedef struct {
	/* All fields are private.
	 */
	/*< private >*/
	char *name;
	int v;
	GMutex mutex;
	/* FIXME: sizeof(GCond) != sizeof(GCond *)
	 * https://gitlab.gnome.org/GNOME/glib/-/issues/1256
	 */
	GCond *cond;
} VipsSemaphore;
VIPS_API
int vips_semaphore_up(VipsSemaphore *s);
VIPS_API
int vips_semaphore_upn(VipsSemaphore *s, int n);
VIPS_API
int vips_semaphore_down(VipsSemaphore *s);
VIPS_API
int vips_semaphore_downn(VipsSemaphore *s, int n);
VIPS_API
int vips_semaphore_down_timeout(VipsSemaphore *s, gint64 timeout);
VIPS_API
void vips_semaphore_destroy(VipsSemaphore *s);
VIPS_API
void vips_semaphore_init(VipsSemaphore *s, int v, char *name);
#ifdef __cplusplus
}
#endif /*__cplusplus*/
#endif /*VIPS_SEMAPHORE_H*/