sergiotarxz/libvips
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delay region resource unref to reduce malloc churn

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we were unreffing windows and buffers attached to regions on
vips_region_region() etc.

when these regions were reinitialised later, fresh buffers were
allocated causing a lot of churn
This commit is contained in:
John Cupitt 2013-12-07 11:38:32 +00:00
parent fd47e26164
commit 6ae1888ab3
2 changed files with 18 additions and 23 deletions
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6
libvips/iofuncs/buffer.c
View File

@ -407,7 +407,8 @@ vips_buffer_unref_ref( VipsBuffer *old_buffer, VipsImage *im, VipsRect *area )
{
VipsBuffer *buffer;
g_assert( !old_buffer || old_buffer->im == im );
g_assert( !old_buffer ||
old_buffer->im == im );
/* Is the current buffer OK?
*/
@ -424,7 +425,8 @@ vips_buffer_unref_ref( VipsBuffer *old_buffer, VipsImage *im, VipsRect *area )
/* Is the current buffer unshared? We can just move it.
*/
if( old_buffer && old_buffer->ref_count == 1 ) {
if( old_buffer &&
old_buffer->ref_count == 1 ) {
if( buffer_move( old_buffer, area ) ) {
vips_buffer_unref( old_buffer );
return( NULL );

35
libvips/iofuncs/region.c
View File

@ -41,6 +41,8 @@
* - move invalid stuff to region
* 3/3/11
* - move on top of VipsObject, rename as VipsRegion
* 7/12/13
* - delay attached resource unref to reduce malloc/free cycling
*/
/*
@ -258,16 +260,6 @@ vips__region_stop( VipsRegion *region )
}
}
/* Free any resources we have.
*/
static void
vips_region_reset( VipsRegion *region )
{
VIPS_FREEF( vips_window_unref, region->window );
VIPS_FREEF( vips_buffer_unref, region->buffer );
region->invalid = FALSE;
}
static void
vips_region_dispose( GObject *gobject )
{
@ -287,7 +279,8 @@ vips_region_dispose( GObject *gobject )
/* Free any attached memory.
*/
vips_region_reset( region );
VIPS_FREEF( vips_window_unref, region->window );
VIPS_FREEF( vips_buffer_unref, region->buffer );
/* Detach from image.
*/
@ -573,16 +566,17 @@ vips_region_buffer( VipsRegion *reg, VipsRect *r )
* If not, try to reuse the current buffer.
*/
if( reg->invalid ) {
vips_region_reset( reg );
reg->invalid = FALSE;
VIPS_FREEF( vips_buffer_unref, reg->buffer );
if( !(reg->buffer = vips_buffer_new( im, &clipped )) )
return( -1 );
}
else {
/* Don't call vips_region_reset() ... we combine buffer unref
/* Don't unref the old buffer ... we combine buffer unref
* and new buffer ref in one call to reduce malloc/free
* cycling.
*/
VIPS_FREEF( vips_window_unref, reg->window );
reg->invalid = FALSE;
if( !(reg->buffer =
vips_buffer_unref_ref( reg->buffer, im, &clipped )) )
return( -1 );
@ -639,12 +633,11 @@ vips_region_image( VipsRegion *reg, VipsRect *r )
if( image->data ) {
/* We have the whole image available ... easy!
*/
vips_region_reset( reg );
/* We can't just set valid = clipped, since this may be an
*
* We can't just set valid = clipped, since this may be an
* incompletely calculated memory buffer. Just set valid to r.
*/
reg->invalid = FALSE;
reg->valid = clipped;
reg->bpl = VIPS_IMAGE_SIZEOF_LINE( image );
reg->data = VIPS_IMAGE_ADDR( image, clipped.left, clipped.top );
@ -658,8 +651,8 @@ vips_region_image( VipsRegion *reg, VipsRect *r )
reg->window->top > clipped.top ||
reg->window->top + reg->window->height <
clipped.top + clipped.height ) {
vips_region_reset( reg );
reg->invalid = FALSE;
VIPS_FREEF( vips_window_unref, reg->window );
if( !(reg->window = vips_window_ref( image,
clipped.top, clipped.height )) )
return( -1 );
@ -786,7 +779,7 @@ vips_region_region( VipsRegion *reg,
/* Init new stuff.
*/
vips_region_reset( reg );
reg->invalid = FALSE;
reg->valid = final;
reg->bpl = dest->bpl;
reg->data = VIPS_REGION_ADDR( dest, clipped2.left, clipped2.top );