132 lines
3.6 KiB
C
132 lines
3.6 KiB
C
/* Thread eval for VIPS.
|
|
*
|
|
* 29/9/99 JC
|
|
* - from thread.h
|
|
*/
|
|
|
|
/*
|
|
|
|
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_THREADGROUP_H
|
|
#define IM_THREADGROUP_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /*__cplusplus*/
|
|
|
|
#include <vips/semaphore.h>
|
|
|
|
/* Stack size for each thread. Need to set this explicitly because some
|
|
* systems have a very low default.
|
|
|
|
FIXME ... should have an environment variable for this?
|
|
|
|
*/
|
|
#define IM__DEFAULT_STACK_SIZE (2 * 1024 * 1024)
|
|
|
|
/* A work function.
|
|
*/
|
|
typedef int (*im__work_fn)( REGION *, void *, void *, void * );
|
|
|
|
/* What we track for each thread.
|
|
*/
|
|
typedef struct {
|
|
REGION *reg; /* Region this thread operates on */
|
|
struct im__threadgroup_t *tg; /* Thread group we are part of */
|
|
|
|
GThread *thread; /* Thread for this region */
|
|
im_semaphore_t go; /* Thread waits here to start work */
|
|
int kill; /* Set this to make thread exit */
|
|
int error; /* Set by thread if work fn fails */
|
|
|
|
REGION *oreg; /* If part of an inplace threadgroup, */
|
|
Rect pos; /* where this thread should write */
|
|
int x, y; /* it's result */
|
|
|
|
void *a, *b, *c; /* User arguments to work fns */
|
|
|
|
#ifdef TIME_THREAD
|
|
hrtime_t *btime, *etime;
|
|
int tpos;
|
|
#endif /*TIME_THREAD*/
|
|
} im_thread_t;
|
|
|
|
/* What we track for a group of threads working together.
|
|
*/
|
|
typedef struct im__threadgroup_t {
|
|
int zombie; /* Set if has been freed */
|
|
|
|
IMAGE *im; /* Image we are calculating */
|
|
int pw, ph; /* Tile size */
|
|
int nlines; /* Scanlines-at-once we prefer for iteration */
|
|
|
|
im__work_fn work; /* Work fn for this threadgroup */
|
|
int inplace; /* Regions should be contiguous */
|
|
|
|
int nthr; /* Number of threads in group */
|
|
im_thread_t **thr; /* Threads */
|
|
|
|
im_semaphore_t idle_sem;/* The number of idle threads */
|
|
GSList *idle; /* All the idle threads */
|
|
GMutex *idle_lock;
|
|
#ifdef DEBUG_HIGHWATER
|
|
int nidle; /* Number of idles */
|
|
int min_idle; /* How short idle got */
|
|
#endif /*DEBUG_HIGHWATER*/
|
|
|
|
int kill; /* Set this to stop threadgroup early */
|
|
|
|
int progress; /* Set this to get eval progress feedback */
|
|
} im_threadgroup_t;
|
|
|
|
void im_concurrency_set( int concurrency );
|
|
int im_concurrency_get( void );
|
|
|
|
/* Thread group functions.
|
|
*/
|
|
im_threadgroup_t *im_threadgroup_create( IMAGE *im );
|
|
int im_threadgroup_free( im_threadgroup_t *tg );
|
|
im_thread_t *im_threadgroup_get( im_threadgroup_t *tg );
|
|
void im_threadgroup_wait( im_threadgroup_t *tg );
|
|
int im_threadgroup_iserror( im_threadgroup_t *tg );
|
|
void im_threadgroup_trigger( im_thread_t *thr );
|
|
|
|
/* Threaded im_prepare()
|
|
*/
|
|
int im_prepare_thread( im_threadgroup_t *tg, REGION *oreg, Rect *r );
|
|
|
|
/* Threaded, double-buffered eval to file.
|
|
*/
|
|
typedef int (*im_wbuffer_fn)( REGION *region, Rect *area, void *a, void *b );
|
|
int im_wbuffer( im_threadgroup_t *tg,
|
|
im_wbuffer_fn write_fn, void *a, void *b );
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /*__cplusplus*/
|
|
|
|
#endif /*IM_THREADGROUP_H*/
|