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im_iterate() has an optional threadpool backend too

This commit is contained in:
John Cupitt 2010-04-09 16:51:45 +00:00
parent 5b00c86bab
commit 56c1c9c036
12 changed files with 435 additions and 178 deletions
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1
ChangeLog
View File

@ -11,6 +11,7 @@
- fixed a couple of /0 problems with scale == 0 masks
- set G_LOG_DOMAIN to VIPS so we can use g_warning etc.
- added VIPS_DEBUG_MSG() macro
- --vips-wbuffer2 turns on threadpool for im_iterate as well
16/1/10 started 7.21.2
- "invalidate" is careful to keep images alive, so invalidate callbacks can do

7
TODO
View File

@ -1,9 +1,8 @@
- how about
- vips_threadpool() has three clientdata, do we need all of them? maube one is
enough
#define VIPS_DEBUG_MSG( STR ) printf( ...)
nicer than lots of #ifdef DEBUG ...
rename vips_discsink() / discsink.c as vips_sink_disc / sinkdisc
- vips_sink() needs to be able to supply a thread start / stop function

16
libvips/include/vips/debug.h
View File

@ -35,27 +35,27 @@ extern "C" {
#endif /*__cplusplus*/
#ifdef VIPS_DEBUG
#define VIPS_DEBUG_MSG( FMT, ... ) printf( FMT, __VA_ARGS__ )
#define VIPS_DEBUG_MSG( ... ) printf( __VA_ARGS__ )
#else
#define VIPS_DEBUG_MSG( FMT, ... )
#define VIPS_DEBUG_MSG( ... )
#endif /*VIPS_DEBUG*/
#ifdef VIPS_DEBUG_RED
#define VIPS_DEBUG_MSG_RED( FMT, ... ) printf( "red: " FMT, __VA_ARGS__ )
#define VIPS_DEBUG_MSG_RED( ... ) printf( "red: " __VA_ARGS__ )
#else
#define VIPS_DEBUG_MSG_RED( FMT, ... )
#define VIPS_DEBUG_MSG_RED( ... )
#endif /*VIPS_DEBUG_RED*/
#ifdef VIPS_DEBUG_AMBER
#define VIPS_DEBUG_MSG_AMBER( FMT, ... ) printf( "amber: " FMT, __VA_ARGS__ )
#define VIPS_DEBUG_MSG_AMBER( ... ) printf( "amber: " __VA_ARGS__ )
#else
#define VIPS_DEBUG_MSG_AMBER( FMT, ... )
#define VIPS_DEBUG_MSG_AMBER( ... )
#endif /*VIPS_DEBUG_AMBER*/
#ifdef VIPS_DEBUG_GREEN
#define VIPS_DEBUG_MSG_GREEN( FMT, ... ) printf( "green: " FMT, __VA_ARGS__ )
#define VIPS_DEBUG_MSG_GREEN( ... ) printf( "green: " __VA_ARGS__ )
#else
#define VIPS_DEBUG_MSG_GREEN( FMT, ... )
#define VIPS_DEBUG_MSG_GREEN( ... )
#endif /*VIPS_DEBUG_GREEN*/
/* All open image descriptors ... see im_init() and im_close().

6
libvips/include/vips/generate.h
View File

@ -90,12 +90,6 @@ int im_render_priority( IMAGE *in, IMAGE *out, IMAGE *mask,
void (*notify)( IMAGE *, Rect *, void * ), void *client );
int im_cache( IMAGE *in, IMAGE *out, int width, int height, int max );
typedef void (*VipsSinkNotify)( VipsImage *im, Rect *rect, void *client );
int vips_sink_screen( VipsImage *in, VipsImage *out, VipsImage *mask,
int width, int height, int max,
int priority,
VipsSinkNotify notify, void *client );
/* WIO.
*/
int im_setupout( IMAGE *im );

76
libvips/include/vips/threadpool.h
View File

@ -42,51 +42,103 @@ extern "C" {
#include <vips/semaphore.h>
/* The per-thread state we expose. Allocate functions can use these members to
/* Per-thread state. Allocate functions can use these members to
* communicate with work functions.
*/
#define VIPS_TYPE_THREAD_STATE (vips_thread_state_get_type())
#define VIPS_THREAD_STATE( obj ) \
(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
VIPS_TYPE_THREAD_STATE, VipsThreadState ))
#define VIPS_THREAD_STATE_CLASS( klass ) \
(G_TYPE_CHECK_CLASS_CAST( (klass), \
VIPS_TYPE_THREAD_STATE, VipsThreadStateClass))
#define VIPS_IS_THREAD_STATE( obj ) \
(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_THREAD_STATE ))
#define VIPS_IS_THREAD_STATE_CLASS( klass ) \
(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_THREAD_STATE ))
#define VIPS_THREAD_STATE_GET_CLASS( obj ) \
(G_TYPE_INSTANCE_GET_CLASS( (obj), \
VIPS_TYPE_THREAD_STATE, VipsThreadStateClass ))
typedef struct _VipsThreadState {
VipsObject parent_object;
/* Image we run on.
*/
VipsImage *im;
/* This region is created and destroyed by the threadpool for the
* worker.
* use of the worker.
*/
REGION *reg;
/* The rest are neither used nor set, do what you like with them.
/* Neither used nor set, do what you like with them.
*/
Rect pos;
int x, y;
void *d, *e, *f;
/* The client data passed to the enclosing vips_threadpool_run().
*/
void *a;
} VipsThreadState;
typedef struct _VipsThreadStateClass {
VipsObjectClass parent_class;
} VipsThreadStateClass;
void *vips_thread_state_set( VipsObject *object, void *a, void *b );
GType vips_thread_state_get_type( void );
VipsThreadState *vips_thread_state_new( VipsImage *im, void *a );
/* Constructor for per-thread state.
*/
typedef VipsThreadState *(*VipsThreadStart)( VipsImage *im, void *a );
/* A work allocate function. This is run single-threaded by a worker to
* set up a new work unit.
* Return non-zero for errors. Set *stop for "no more work to do"
*/
typedef int (*VipsThreadpoolAllocate)( VipsThreadState *state,
void *a, void *b, void *c, gboolean *stop );
void *a, gboolean *stop );
/* A work function. This does a unit of work (eg. processing a tile or
* whatever). Return non-zero for errors.
*/
typedef int (*VipsThreadpoolWork)( VipsThreadState *state,
void *a, void *b, void *c );
typedef int (*VipsThreadpoolWork)( VipsThreadState *state, void *a );
/* A progress function. This is run by the main thread once for every
* allocation. Return an error to kill computation early.
*/
typedef int (*VipsThreadpoolProgress)( void *a, void *b, void *c );
typedef int (*VipsThreadpoolProgress)( void *a );
int vips_threadpool_run( VipsImage *im,
VipsThreadStart start,
VipsThreadpoolAllocate allocate,
VipsThreadpoolWork work,
VipsThreadpoolProgress progress,
void *a, void *b, void *c );
void *a );
void vips_get_tile_size( VipsImage *im,
int *tile_width, int *tile_height, int *nlines );
typedef int (*VipsRegionWrite)( REGION *region, Rect *area, void *a, void *b );
int vips_discsink( VipsImage *im,
VipsRegionWrite write_fn, void *a, void *b );
typedef int (*VipsRegionWrite)( REGION *region, Rect *area, void *a );
int vips_sink_disc( VipsImage *im, VipsRegionWrite write_fn, void *a );
typedef void *(*VipsStart)( VipsImage *out, void *a, void *b );
typedef int (*VipsGenerate)( REGION *out, void *seq, void *a, void *b );
typedef int (*VipsStop)( void *seq, void *a, void *b );
int vips_sink( VipsImage *im,
VipsStart start, VipsGenerate generate, VipsStop stop,
void *a, void *b );
typedef void (*VipsSinkNotify)( VipsImage *im, Rect *rect, void *client );
int vips_sink_screen( VipsImage *in, VipsImage *out, VipsImage *mask,
int width, int height, int max,
int priority,
VipsSinkNotify notify, void *client );
#ifdef __cplusplus
}

3
libvips/iofuncs/Makefile.am
View File

@ -29,7 +29,8 @@ libiofuncs_la_SOURCES = \
im_unmapfile.c \
im_guess_prefix.c \
im_wbuffer.c \
discsink.c \
sinkdisc.c \
sink.c \
im_wrapmany.c \
im_writeline.c \
memory.c \

3
libvips/iofuncs/im_iterate.c
View File

@ -379,6 +379,9 @@ im_iterate( IMAGE *im,
Iterate iter;
int result;
if( im__wbuffer2 )
return( vips_sink( im, start, generate, stop, b, c ) );
g_assert( !im_image_sanity( im ) );
/* We don't use this, but make sure it's set in case any old binaries

3
libvips/iofuncs/im_wbuffer.c
View File

@ -430,7 +430,8 @@ im_wbuffer( im_threadgroup_t *tg, im_wbuffer_fn write_fn, void *a, void *b )
/* Optionally use the newer one.
*/
if( im__wbuffer2 )
return( vips_discsink( tg->im, write_fn, a, b ) );
return( vips_sink_disc( tg->im,
(VipsRegionWrite) write_fn, a ) );
if( im__start_eval( tg->im ) )
return( -1 );

197
libvips/iofuncs/sink.c
View File

@ -31,8 +31,8 @@
*/
/*
#define DEBUG
*/
#define VIPS_DEBUG
#ifdef HAVE_CONFIG_H
#include <config.h>
@ -72,7 +72,7 @@ typedef struct _Sink {
int tile_height;
int nlines;
/* Keep the sequence value in VipsThreadState->d.
/* Call params.
*/
im_start_fn start;
im_generate_fn generate;
@ -81,6 +81,124 @@ typedef struct _Sink {
void *b;
} Sink;
/* Our per-thread state.
*/
typedef struct _SinkThreadState {
VipsThreadState parent_object;
/* Sequence value for this thread.
*/
void *seq;
/* The region we walk over sink.t copy. We can't use
* parent_object.reg, it's defined on the outer image.
*/
REGION *reg;
} SinkThreadState;
typedef struct _SinkThreadStateClass {
VipsThreadStateClass parent_class;
} SinkThreadStateClass;
G_DEFINE_TYPE( SinkThreadState, sink_thread_state, VIPS_TYPE_THREAD_STATE );
/* Call a thread's stop function.
*/
static int
sink_call_stop( Sink *sink, SinkThreadState *state )
{
if( state->seq && sink->stop ) {
VIPS_DEBUG_MSG( "sink_call_stop: state = %p\n", state );
if( sink->stop( state->seq, sink->a, sink->b ) ) {
im_error( "vips_sink",
_( "stop function failed for image \"%s\"" ),
sink->im->filename );
return( -1 );
}
state->seq = NULL;
}
return( 0 );
}
static void
sink_thread_state_dispose( GObject *gobject )
{
SinkThreadState *state = (SinkThreadState *) gobject;
Sink *sink = (Sink *) ((VipsThreadState *) state)->a;
sink_call_stop( sink, state );
IM_FREEF( im_region_free, state->reg );
G_OBJECT_CLASS( sink_thread_state_parent_class )->dispose( gobject );
}
/* Call the start function for this thread, if necessary.
*/
static int
sink_call_start( Sink *sink, SinkThreadState *state )
{
if( !state->seq && sink->start ) {
VIPS_DEBUG_MSG( "sink_call_start: state = %p\n", state );
state->seq = sink->start( sink->t, sink->a, sink->b );
if( !state->seq ) {
im_error( "vips_sink",
_( "start function failed for image \"%s\"" ),
sink->im->filename );
return( -1 );
}
}
return( 0 );
}
static int
sink_thread_state_build( VipsObject *object )
{
SinkThreadState *state = (SinkThreadState *) object;
Sink *sink = (Sink *) ((VipsThreadState *) state)->a;
if( !(state->reg = im_region_create( sink->t )) ||
sink_call_start( sink, state ) )
return( -1 );
return( VIPS_OBJECT_CLASS(
sink_thread_state_parent_class )->build( object ) );
}
static void
sink_thread_state_class_init( SinkThreadStateClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = VIPS_OBJECT_CLASS( class );
gobject_class->dispose = sink_thread_state_dispose;
object_class->build = sink_thread_state_build;
object_class->nickname = "sinkthreadstate";
object_class->description = _( "per-thread state for sink" );
}
static void
sink_thread_state_init( SinkThreadState *state )
{
state->seq = NULL;
state->reg = NULL;
}
static VipsThreadState *
sink_thread_state_new( VipsImage *im, void *a )
{
return( VIPS_THREAD_STATE( vips_object_new(
sink_thread_state_get_type(),
vips_thread_state_set, im, a ) ) );
}
static void
sink_free( Sink *sink )
{
@ -95,6 +213,8 @@ sink_init( Sink *sink,
{
sink->im = im;
sink->t = NULL;
sink->x = 0;
sink->y = 0;
sink->start = start;
sink->generate = generate;
sink->stop = stop;
@ -113,54 +233,8 @@ sink_init( Sink *sink,
return( 0 );
}
/* Call the start function for this thread, if necessary.
*/
static int
sink_call_start( Sink *sink, VipsThreadState *state )
{
if( !state->d && sink->start ) {
#ifdef DEBUG
printf( "sink_call_start: state = %p\n", state );
#endif /*DEBUG*/
state->d = sink->start( sink->t, sink->a, sink->b );
if( !state->d ) {
im_error( "vips_sink",
_( "start function failed for image \"%s\"" ),
sink->im->filename );
return( -1 );
}
}
return( 0 );
}
/* Call a thread's stop function.
*/
static int
sink_call_stop( Sink *sink, VipsThreadState *state )
{
if( state->d && sink->stop ) {
#ifdef DEBUG
printf( "sink_call_stop: state = %p\n", state );
#endif /*DEBUG*/
if( sink->stop( state->d, sink->a, sink->b ) ) {
im_error( "vips_sink",
_( "stop function failed for image \"%s\"" ),
sink->im->filename );
return( -1 );
}
state->d = NULL;
}
return( 0 );
}
static int
sink_allocate( VipsThreadState *state,
void *a, void *b, void *c, gboolean *stop )
sink_allocate( VipsThreadState *state, void *a, gboolean *stop )
{
Sink *sink = (Sink *) a;
@ -173,14 +247,12 @@ sink_allocate( VipsThreadState *state,
sink->y += sink->tile_height;
if( sink->y >= sink->im->Ysize ) {
sink_call_stop( sink, state );
*stop = TRUE;
return( 0 );
}
}
sink_call_start( sink, state );
/* x, y and buf are good: save params for thread.
*/
image.left = 0;
@ -195,27 +267,26 @@ sink_allocate( VipsThreadState *state,
/* Move state on.
*/
write->x += write->tile_width;
sink->x += sink->tile_width;
return( 0 );
}
static int
sink_work( VipsThreadState *state, void *a, void *b, void *c )
sink_work( VipsThreadState *state, void *a )
{
SinkThreadState *sstate = (SinkThreadState *) state;
Sink *sink = (Sink *) a;
if( im_prepare( state->reg, &state->pos ) ||
sink->generate( state->reg, state->d, sink->a, sink->b ) ) {
sink_call_stop( sink, state );
if( im_prepare( sstate->reg, &state->pos ) ||
sink->generate( sstate->reg, sstate->seq, sink->a, sink->b ) )
return( -1 );
}
return( 0 );
}
static int
sink_progress( void *a, void *b, void *c )
sink_progress( void *a )
{
Sink *sink = (Sink *) a;
@ -239,7 +310,7 @@ sink_progress( void *a, void *b, void *c )
* @b: user data
*
* Loops over an image. @generate is called for every pixel in the image, with
* the @reg argument being a region of pixels for processing. im_iterate() is
* the @reg argument being a region of pixels for processing. vips_sink() is
* used to implement operations like im_avg() which have no image output.
*
* See also: im_generate(), im_open().
@ -270,7 +341,11 @@ vips_sink( VipsImage *im,
}
result = vips_threadpool_run( im,
sink_allocate, sink_work, sink_progress, &sink, NULL );
sink_thread_state_new,
sink_allocate,
sink_work,
sink_progress,
&sink );
im__end_eval( sink.t );

86
libvips/iofuncs/discsink.c → libvips/iofuncs/sinkdisc.c
View File

@ -1,4 +1,4 @@
/* Write an image.
/* Write an image to a disc file.
*
* 19/3/10
* - from im_wbuffer.c
@ -101,13 +101,51 @@ typedef struct _Write {
*/
VipsRegionWrite write_fn;
void *a;
void *b;
} Write;
/* Enable im_wbuffer2 ... set from the cmd line, tested by our users.
*/
int im__wbuffer2 = 0;
/* Our per-thread state ... we need to also track the buffer that pos is
* supposed to write to.
*/
typedef struct _WriteThreadState {
VipsThreadState parent_object;
WriteBuffer *buf;
} WriteThreadState;
typedef struct _WriteThreadStateClass {
VipsThreadStateClass parent_class;
} WriteThreadStateClass;
G_DEFINE_TYPE( WriteThreadState, write_thread_state, VIPS_TYPE_THREAD_STATE );
static void
write_thread_state_class_init( WriteThreadStateClass *class )
{
VipsObjectClass *object_class = VIPS_OBJECT_CLASS( class );
object_class->nickname = "writethreadstate";
object_class->description = _( "per-thread state for sinkdisc" );
}
static void
write_thread_state_init( WriteThreadState *state )
{
state->buf = NULL;
}
static VipsThreadState *
write_thread_state_new( VipsImage *im, void *a )
{
return( VIPS_THREAD_STATE( vips_object_new(
write_thread_state_get_type(),
vips_thread_state_set, im, a ) ) );
}
static void
wbuffer_free( WriteBuffer *wbuffer )
{
@ -147,7 +185,7 @@ wbuffer_write( WriteBuffer *wbuffer )
#endif /*DEBUG*/
wbuffer->write_errno = write->write_fn( wbuffer->region,
&wbuffer->area, write->a, write->b );
&wbuffer->area, write->a );
}
#ifdef HAVE_THREADS
@ -308,9 +346,9 @@ wbuffer_position( WriteBuffer *wbuffer, int top, int height )
* iteration.
*/
static gboolean
wbuffer_allocate_fn( VipsThreadState *state,
void *a, void *b, void *c, gboolean *stop )
wbuffer_allocate_fn( VipsThreadState *state, void *a, gboolean *stop )
{
WriteThreadState *wstate = (WriteThreadState *) state;
Write *write = (Write *) a;
Rect image;
@ -359,7 +397,7 @@ wbuffer_allocate_fn( VipsThreadState *state,
tile.width = write->tile_width;
tile.height = write->tile_height;
im_rect_intersectrect( &image, &tile, &state->pos );
state->d = write->buf;
wstate->buf = write->buf;
/* Add to the number of writers on the buffer.
*/
@ -375,22 +413,21 @@ wbuffer_allocate_fn( VipsThreadState *state,
/* Our VipsThreadpoolWork function ... generate a tile!
*/
static int
wbuffer_work_fn( VipsThreadState *state,
void *a, void *b, void *c )
wbuffer_work_fn( VipsThreadState *state, void *a )
{
WriteBuffer *wbuffer = (WriteBuffer *) state->d;
WriteThreadState *wstate = (WriteThreadState *) state;
#ifdef DEBUG
printf( "wbuffer_work_fn\n" );
#endif /*DEBUG*/
if( im_prepare_to( state->reg, wbuffer->region,
if( im_prepare_to( state->reg, wstate->buf->region,
&state->pos, state->pos.left, state->pos.top ) )
return( -1 );
/* Tell the bg write thread we've left.
*/
im_semaphore_upn( &wbuffer->nwrite, 1 );
im_semaphore_upn( &wstate->buf->nwrite, 1 );
return( 0 );
}
@ -398,7 +435,7 @@ wbuffer_work_fn( VipsThreadState *state,
/* Our VipsThreadpoolProgress function ... send some eval progress feedback.
*/
static int
wbuffer_progress_fn( void *a, void *b, void *c )
wbuffer_progress_fn( void *a )
{
Write *write = (Write *) a;
@ -414,7 +451,7 @@ wbuffer_progress_fn( void *a, void *b, void *c )
static void
write_init( Write *write,
VipsImage *im, VipsRegionWrite write_fn, void *a, void *b )
VipsImage *im, VipsRegionWrite write_fn, void *a )
{
write->im = im;
write->buf = wbuffer_new( write );
@ -423,7 +460,6 @@ write_init( Write *write,
write->y = 0;
write->write_fn = write_fn;
write->a = a;
write->b = b;
vips_get_tile_size( im,
&write->tile_width, &write->tile_height, &write->nlines );
@ -440,7 +476,6 @@ write_free( Write *write )
* VipsRegionWrite:
* @region: pixels to write
* @a: client data
* @b: client data
*
* The function should write the pixels in @region. @a and @b are the values
* passed into vips_discsink().
@ -451,16 +486,16 @@ write_free( Write *write )
*/
/**
* vips_discsink:
* vips_sink_disc:
* @im: image to process
* @write_fn: called for every batch of pixels
* @a: client data
* @b: client data
*
* vips_discsink() loops over @im, top-to-bottom, generating it in sections.
* vips_sink_disc() loops over @im, top-to-bottom, generating it in sections.
* As each section is produced, @write_fn is called.
*
* @write_fn is always called single-threaded, it's always given image
* @write_fn is always called single-threaded (though not always from the same
* thread), it's always given image
* sections in top-to-bottom order, and there are never any gaps.
*
* This operation is handy for making image sinks which output to things like
@ -471,7 +506,7 @@ write_free( Write *write )
* Returns: 0 on success, -1 on error.
*/
int
vips_discsink( VipsImage *im, VipsRegionWrite write_fn, void *a, void *b )
vips_sink_disc( VipsImage *im, VipsRegionWrite write_fn, void *a )
{
Write write;
int result;
@ -479,7 +514,13 @@ vips_discsink( VipsImage *im, VipsRegionWrite write_fn, void *a, void *b )
if( im__start_eval( im ) )
return( -1 );
write_init( &write, im, write_fn, a, b );
write_init( &write, im, write_fn, a );
printf( "initing thread state\n" );
vips_thread_state_get_type();
printf( "made thread state\n" );
result = 0;
@ -487,10 +528,11 @@ vips_discsink( VipsImage *im, VipsRegionWrite write_fn, void *a, void *b )
!write.buf_back ||
wbuffer_position( write.buf, 0, write.nlines ) ||
vips_threadpool_run( im,
write_thread_state_new,
wbuffer_allocate_fn,
wbuffer_work_fn,
wbuffer_progress_fn,
&write, NULL, NULL ) )
&write ) )
result = -1;
/* We've set all the buffers writing, but not waited for the BG

214
libvips/iofuncs/threadpool.c
View File

@ -38,8 +38,8 @@
/*
#define TIME_THREAD
#define VIPS_DEBUG_RED
#define VIPS_DEBUG
*/
#define VIPS_DEBUG
#ifdef HAVE_CONFIG_H
#include <config.h>
@ -76,19 +76,106 @@
* can be used to give feedback.
*
* This is like threadgroup, but workers allocate work units themselves. This
* reduces the synchronisation overhead and improves scalability.
* reduces synchronisation overhead and improves scalability.
*/
/**
* VipsThreadState:
* @reg: a #REGION
* @pos: a #Rect
* @x: an int
* @y: an int
* @a: client data
*
* These per-thread values are carried around for your use by
* vips_threadpool_run(). They are private to each thread, so they are a
* useful place
* for #VipsThreadpoolAllocate and #VipsThreadpoolWork to communicate.
*
* @reg is created for you at the start of processing and freed at the end,
* but you can do what you like with it.
*/
G_DEFINE_TYPE( VipsThreadState, vips_thread_state, VIPS_TYPE_OBJECT );
static void
vips_thread_state_dispose( GObject *gobject )
{
VipsThreadState *state = (VipsThreadState *) gobject;
VIPS_DEBUG_MSG( "vips_thread_state_dispose:\n" );
IM_FREEF( im_region_free, state->reg );
G_OBJECT_CLASS( vips_thread_state_parent_class )->dispose( gobject );
}
static int
vips_thread_state_build( VipsObject *object )
{
VipsThreadState *state = (VipsThreadState *) object;
if( !(state->reg = im_region_create( state->im )) )
return( -1 );
return( VIPS_OBJECT_CLASS(
vips_thread_state_parent_class )->build( object ) );
}
static void
vips_thread_state_class_init( VipsThreadStateClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = VIPS_OBJECT_CLASS( class );
gobject_class->dispose = vips_thread_state_dispose;
object_class->build = vips_thread_state_build;
object_class->nickname = "threadstate";
object_class->description = _( "per-thread state for vipsthreadpool" );
}
static void
vips_thread_state_init( VipsThreadState *state )
{
VIPS_DEBUG_MSG( "vips_thread_state_init:\n" );
state->reg = NULL;
}
void *
vips_thread_state_set( VipsObject *object, void *a, void *b )
{
VipsThreadState *state = (VipsThreadState *) object;
VipsImage *im = (VipsImage *) a;
VIPS_DEBUG_MSG( "vips_thread_state_set:\n" );
state->im = im;
state->a = b;
return( NULL );
}
VipsThreadState *
vips_thread_state_new( VipsImage *im, void *a )
{
VIPS_DEBUG_MSG( "vips_thread_state_new:\n" );
return( VIPS_THREAD_STATE( vips_object_new(
VIPS_TYPE_THREAD_STATE, vips_thread_state_set, im, a ) ) );
}
/* What we track for each thread in the pool.
*/
typedef struct {
/* All private.
*/
/*< private >*/
VipsThreadState state;
struct _VipsThreadpool *pool; /* Pool we are part of */
VipsThreadState *state;
/* Thread we are running.
*/
GThread *thread;
@ -115,13 +202,15 @@ typedef struct _VipsThreadpool {
/*< private >*/
VipsImage *im; /* Image we are calculating */
/* Do a unit of work (runs in parallel) and allocate a unit of work
* (serial). Plus the mutex we use to serialize work allocation.
/* STart a thread, do a unit of work (runs in parallel) and allocate
* a unit of work (serial). Plus the mutex we use to serialize work
* allocation.
*/
VipsThreadStart start;
VipsThreadpoolAllocate allocate;
VipsThreadpoolWork work;
GMutex *allocate_lock;
void *a, *b, *c; /* User arguments to work / allocate */
void *a; /* User argument to start / allocate / etc. */
int nthr; /* Number of threads in pool */
VipsThread **thr; /* Threads */
@ -191,7 +280,7 @@ vips_thread_free( VipsThread *thr )
thr->thread = NULL;
}
IM_FREEF( im_region_free, thr->state.reg );
IM_FREEF( g_object_unref, thr->state );
thr->pool = NULL;
#ifdef TIME_THREAD
@ -212,9 +301,14 @@ vips_thread_work_unit( VipsThread *thr )
*/
g_mutex_lock( pool->allocate_lock );
if( !pool->stop ) {
if( pool->allocate( &thr->state,
pool->a, pool->b, pool->c, &pool->stop ) ) {
if( !thr->state )
if( !(thr->state = pool->start( pool->im, pool->a )) ) {
thr->error = TRUE;
pool->error = TRUE;
}
if( !pool->stop && !pool->error ) {
if( pool->allocate( thr->state, pool->a, &pool->stop ) ) {
thr->error = TRUE;
pool->error = TRUE;
}
@ -235,7 +329,7 @@ vips_thread_work_unit( VipsThread *thr )
/* Process a work unit.
*/
if( pool->work( &thr->state, pool->a, pool->b, pool->c ) ) {
if( pool->work( thr->state, pool->a ) ) {
thr->error = TRUE;
pool->error = TRUE;
}
@ -262,11 +356,6 @@ vips_thread_main_loop( void *a )
g_assert( pool == thr->pool );
/* We now control the region (it was created by pool when we
* were built).
*/
im__region_take_ownership( thr->state.reg );
/* Process work units! Always tick, even if we are stopping, so the
* main thread will wake up for exit.
*/
@ -296,7 +385,7 @@ vips_thread_new( VipsThreadpool *pool )
if( !(thr = IM_NEW( pool->im, VipsThread )) )
return( NULL );
thr->pool = pool;
thr->state.reg = NULL;
thr->state = NULL;
thr->thread = NULL;
thr->exit = 0;
thr->error = 0;
@ -306,16 +395,10 @@ vips_thread_new( VipsThreadpool *pool )
thr->tpos = 0;
#endif /*TIME_THREAD*/
/* Attach stuff.
/* We can't build the state here, it has to be done by the worker
* itself the first time that allocate runs so that any regions are
* owned by the correct thread.
*/
if( !(thr->state.reg = im_region_create( pool->im )) ) {
vips_thread_free( thr );
return( NULL );
}
/* Get ready to hand the region over to the thread.
*/
im__region_no_ownership( thr->state.reg );
#ifdef TIME_THREAD
thr->btime = IM_ARRAY( pool->im, IM_TBUF_SIZE, double );
@ -363,6 +446,8 @@ vips_threadpool_kill_threads( VipsThreadpool *pool )
}
}
/* This can be called multiple times, careful.
*/
static int
vips_threadpool_free( VipsThreadpool *pool )
{
@ -439,21 +524,21 @@ vips_threadpool_create_threads( VipsThreadpool *pool )
}
/**
* VipsThreadState:
* @reg: a #REGION
* @pos: a #Rect
* @x: an int
* @y: an int
* @d: client data
* @e: client data
* @f: client data
* VipsThreadpoolStart:
* @a: client data
* @b: client data
* @c: client data
*
* These per-thread values are carried around for your use by
* vips_threadpool_run(). They are private to each thread, so they are handy
* for VipsThreadpoolAllocate and VipsThreadpoolWork to communicate.
* This function is called once by each worker just before the first time work
* is allocated to it to build the per-thread state. Per-thread state is used
* by #VipsThreadpoolAllocate and #VipsThreadpoolWork to communicate.
*
* @reg is created for you at the start of processing and freed at the end,
* but you can do what you like with it.
* #VipsThreadState is a subclass of #VipsObject. Start functions are called
* from allocate, that is, they are single-threaded.
*
* See also: vips_threadpool_run().
*
* Returns: a new #VipsThreadState object, or NULL on error
*/
/**
@ -465,7 +550,7 @@ vips_threadpool_create_threads( VipsThreadpool *pool )
* @stop: set this to signal end of computation
*
* This function is called to allocate a new work unit for the thread. It is
* always single-threaded, so it can modify per-call state (such as a
* always single-threaded, so it can modify per-pool state (such as a
* counter).
*
* @a, @b, @c are the values supplied to the call to
@ -474,9 +559,9 @@ vips_threadpool_create_threads( VipsThreadpool *pool )
* It should set @stop to %TRUE to indicate that no work could be allocated
* because the job is done.
*
* It should return 0 for a normal return, or non-zero to indicate an error.
*
* See also: vips_threadpool_run().
*
* Returns: 0 on success, or -1 on error
*/
/**
@ -487,15 +572,15 @@ vips_threadpool_create_threads( VipsThreadpool *pool )
* @c: client data
*
* This function is called to process a work unit. Many copies of this can run
* at once, so it should not write to the per-call state. It can write to
* at once, so it should not write to the per-pool state. It can write to
* per-thread state.
*
* @a, @b, @c are the values supplied to the call to
* vips_threadpool_run().
*
* It should return 0 for a normal return, or non-zero to indicate an error.
*
* See also: vips_threadpool_run().
*
* Returns: 0 on success, or -1 on error
*/
/**
@ -507,14 +592,15 @@ vips_threadpool_create_threads( VipsThreadpool *pool )
* This function is called by the main thread once for every work unit
* processed. It can be used to give the user progress feedback.
*
* It should return 0 for a normal return, or non-zero to indicate an error.
*
* See also: vips_threadpool_run().
*
* Returns: 0 on success, or -1 on error
*/
/**
* vips_threadpool_run:
* @im: image to loop over
* @start: allocate per-thread state
* @allocate: allocate a work unit
* @work: process a work unit
* @progress: give progress feedback about a work unit, or %NULL
@ -522,30 +608,33 @@ vips_threadpool_create_threads( VipsThreadpool *pool )
* @b: client data
* @c: client data
*
* This function runs a set of threads over an image. Each thread run
* This function runs a set of threads over an image. Each thread first calls
* @start to create new per-thread state, then runs
* @allocate to set up a new work unit (perhaps the next tile in an image, for
* example), then @work to process that work unit. After each unit is
* processed, @progress is called, so that the operation can give
* progress feedback.@progress may be %NULL.
* progress feedback. @progress may be %NULL.
*
* Each thread has a small amount of private state that vips_threadpool_run()
* maintains for it. The @allocate and @work functions can use this to
* communicate.
* Each thread has private state that the @allocate and @work functions can
* use to communicate. This state is created by each worker as it starts using
* @start. Use the state destructor to clean up.
*
* @allocate is always single-threaded (so it can write to the per-call state),
* whereas @work can be executed concurrently. @progress is always called by
* the main thread (ie. the thread which called vips_thtreadpool_run()).
* @allocate and @start are always single-threaded (so they can write to the
* per-pool state), whereas @work can be executed concurrently. @progress is
* always called by
* the main thread (ie. the thread which called vips_threadpool_run()).
*
* See also: im_wbuffer2(), im_concurrency_set().
*
* Returns: 0 on success, -1 on error.
* Returns: 0 on success, or -1 on error.
*/
int
vips_threadpool_run( VipsImage *im,
VipsThreadStart start,
VipsThreadpoolAllocate allocate,
VipsThreadpoolWork work,
VipsThreadpoolProgress progress,
void *a, void *b, void *c )
void *a )
{
VipsThreadpool *pool;
int result;
@ -558,11 +647,10 @@ vips_threadpool_run( VipsImage *im,
if( !(pool = vips_threadpool_new( im )) )
return( -1 );
pool->start = start;
pool->allocate = allocate;
pool->work = work;
pool->a = a;
pool->b = b;
pool->c = c;
/* Attach workers and set them going.
*/
@ -586,7 +674,7 @@ vips_threadpool_run( VipsImage *im,
break;
if( progress &&
progress( pool->a, pool->b, pool->c ) )
progress( pool->a ) )
pool->error = TRUE;
if( pool->stop || pool->error )
@ -631,10 +719,10 @@ vips_get_tile_size( VipsImage *im,
*tile_height = im__tile_height;
/* Enough lines of tiles that we can expect to be able to keep
* nthr busy.
* nthr busy. Then double it.
*/
*nlines = *tile_height *
(1 + nthr / IM_MAX( 1, im->Xsize / *tile_width ));
(1 + nthr / IM_MAX( 1, im->Xsize / *tile_width )) * 2;
break;
case IM_FATSTRIP:

1
libvips/resample/interpolate.c
View File

@ -147,6 +147,7 @@ vips_interpolate( VipsInterpolate *interpolate,
VipsInterpolateClass *class = VIPS_INTERPOLATE_GET_CLASS( interpolate );
g_assert( class->interpolate );
class->interpolate( interpolate, out, in, x, y );
}