libvips/include/vips/semaphore.h

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2007-08-29 18:23:50 +02:00
/* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifndef IM_SEMAPHORE_H
#define IM_SEMAPHORE_H
#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/
/* Implement our own semaphores.
*/
typedef struct {
char *name;
int v;
GMutex *mutex;
GCond *cond;
} im_semaphore_t;
int im_semaphore_up( im_semaphore_t *s );
int im_semaphore_down( im_semaphore_t *s );
int im_semaphore_upn( im_semaphore_t *s, int n );
int im_semaphore_downn( im_semaphore_t *s, int n );
void im_semaphore_destroy( im_semaphore_t *s );
void im_semaphore_init( im_semaphore_t *s, int v, char *name );
#ifdef __cplusplus
}
#endif /*__cplusplus*/
#endif /*IM_SEMAPHORE_H*/