libvips/test/test_descriptors.c

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/* Read an image and check that file handles are being closed on minimise.
*
* This will only work on linux: we signal success and do nothing if /dev/proc
* does not exist.
*/
#include <sys/types.h>
#include <unistd.h>
#include <vips/vips.h>
/* Count the number of files in a directory, -1 for directory not found etc.
*/
static int
count_files( const char *dirname )
{
GDir *dir;
int n;
if( !(dir = g_dir_open( dirname, 0, NULL )) )
return( -1 );
for( n = 0; g_dir_read_name( dir ); n++ )
;
g_dir_close( dir );
return( n );
}
int
main( int argc, char **argv )
{
experiment with renaming stream rename as VipsConnection, VipsSource, VipsTarget etc. see https://github.com/libvips/libvips/issues/1494#issuecomment-569498619 renamed with this script: ``` set -e edit() { sed -i -E "$1" rename } for i in $*; do cp $i rename edit s/VIPS_STREAMOU/VIPS_TARGET_CUSTOM/g edit s/VIPS_STREAMO/VIPS_TARGET/g edit s/VIPS_STREAMIU/VIPS_SOURCE_CUSTOM/g edit s/VIPS_STREAMI/VIPS_SOURCE/g edit s/VIPS_STREAM/VIPS_CONNECTION/g edit s/vips_streamou/vips_target_custom/g edit s/vips_streamo/vips_target/g edit s/vips_streamiu/vips_source_custom/g edit s/vips_streami/vips_source/g edit s/vips_stream/vips_connection/g edit s/VipsStreamou/VipsTargetCustom/g edit s/VipsStreamo/VipsTarget/g edit s/VipsStreamiu/VipsSourceCustom/g edit s/VipsStreami/VipsSource/g edit s/VipsStream/VipsConnection/g # eg. VIPS_TYPE_STREAM or VIPS_IS_STREAM edit "s/VIPS_([A-Z]+)_STREAMOU/VIPS_\1_TARGET_CUSTOM/g" edit "s/VIPS_([A-Z]+)_STREAMO/VIPS_\1_TARGET/g" edit "s/VIPS_([A-Z]+)_STREAMIU/VIPS_\1_SOURCE_CUSTOM/g" edit "s/VIPS_([A-Z]+)_STREAMI/VIPS_\1_SOURCE/g" edit "s/VIPS_([A-Z]+)_STREAM/VIPS_\1_CONNECTION/g" edit s/streamou/target_custom/g edit s/streamo/target/g edit s/streamiu/source_custom/g edit s/streami/source/g # various identifiers which also change edit s/is_a_stream/is_a_source/g edit s/find_load_stream/find_load_source/g edit s/find_save_stream/find_save_target/g edit s/new_from_stream/new_from_source/g edit s/write_to_stream/write_to_target/g edit s/vips_thumbnail_stream/vips_thumbnail_source/g # eg. vips_webpload_stream edit "s/vips_([a-z]+)load_stream/vips_\1load_source/g" # eg. vips_webpsave_stream edit "s/vips_([a-z]+)save_stream/vips_\1save_target/g" mv rename $i done ```
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VipsSource *source;
VipsImage *image, *x;
char fd_dir[256];
int n_files;
double average;
if( VIPS_INIT( argv[0] ) )
vips_error_exit( "unable to start" );
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if( argc != 2 )
vips_error_exit( "usage: %s test-image", argv[0] );
vips_snprintf( fd_dir, 256, "/proc/%d/fd", getpid() );
n_files = count_files( fd_dir );
if( n_files == -1 )
/* Probably not linux, silent success.
*/
return( 0 );
/* This is usually 4. stdout / stdin / stderr plus one more made for
* us by glib, I think, doing what I don't know.
*/
/* Opening an image should read the header, then close the fd.
*/
printf( "** seq open ..\n" );
experiment with renaming stream rename as VipsConnection, VipsSource, VipsTarget etc. see https://github.com/libvips/libvips/issues/1494#issuecomment-569498619 renamed with this script: ``` set -e edit() { sed -i -E "$1" rename } for i in $*; do cp $i rename edit s/VIPS_STREAMOU/VIPS_TARGET_CUSTOM/g edit s/VIPS_STREAMO/VIPS_TARGET/g edit s/VIPS_STREAMIU/VIPS_SOURCE_CUSTOM/g edit s/VIPS_STREAMI/VIPS_SOURCE/g edit s/VIPS_STREAM/VIPS_CONNECTION/g edit s/vips_streamou/vips_target_custom/g edit s/vips_streamo/vips_target/g edit s/vips_streamiu/vips_source_custom/g edit s/vips_streami/vips_source/g edit s/vips_stream/vips_connection/g edit s/VipsStreamou/VipsTargetCustom/g edit s/VipsStreamo/VipsTarget/g edit s/VipsStreamiu/VipsSourceCustom/g edit s/VipsStreami/VipsSource/g edit s/VipsStream/VipsConnection/g # eg. VIPS_TYPE_STREAM or VIPS_IS_STREAM edit "s/VIPS_([A-Z]+)_STREAMOU/VIPS_\1_TARGET_CUSTOM/g" edit "s/VIPS_([A-Z]+)_STREAMO/VIPS_\1_TARGET/g" edit "s/VIPS_([A-Z]+)_STREAMIU/VIPS_\1_SOURCE_CUSTOM/g" edit "s/VIPS_([A-Z]+)_STREAMI/VIPS_\1_SOURCE/g" edit "s/VIPS_([A-Z]+)_STREAM/VIPS_\1_CONNECTION/g" edit s/streamou/target_custom/g edit s/streamo/target/g edit s/streamiu/source_custom/g edit s/streami/source/g # various identifiers which also change edit s/is_a_stream/is_a_source/g edit s/find_load_stream/find_load_source/g edit s/find_save_stream/find_save_target/g edit s/new_from_stream/new_from_source/g edit s/write_to_stream/write_to_target/g edit s/vips_thumbnail_stream/vips_thumbnail_source/g # eg. vips_webpload_stream edit "s/vips_([a-z]+)load_stream/vips_\1load_source/g" # eg. vips_webpsave_stream edit "s/vips_([a-z]+)save_stream/vips_\1save_target/g" mv rename $i done ```
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if( !(source = vips_source_new_from_file( argv[1] )) )
vips_error_exit( NULL );
experiment with renaming stream rename as VipsConnection, VipsSource, VipsTarget etc. see https://github.com/libvips/libvips/issues/1494#issuecomment-569498619 renamed with this script: ``` set -e edit() { sed -i -E "$1" rename } for i in $*; do cp $i rename edit s/VIPS_STREAMOU/VIPS_TARGET_CUSTOM/g edit s/VIPS_STREAMO/VIPS_TARGET/g edit s/VIPS_STREAMIU/VIPS_SOURCE_CUSTOM/g edit s/VIPS_STREAMI/VIPS_SOURCE/g edit s/VIPS_STREAM/VIPS_CONNECTION/g edit s/vips_streamou/vips_target_custom/g edit s/vips_streamo/vips_target/g edit s/vips_streamiu/vips_source_custom/g edit s/vips_streami/vips_source/g edit s/vips_stream/vips_connection/g edit s/VipsStreamou/VipsTargetCustom/g edit s/VipsStreamo/VipsTarget/g edit s/VipsStreamiu/VipsSourceCustom/g edit s/VipsStreami/VipsSource/g edit s/VipsStream/VipsConnection/g # eg. VIPS_TYPE_STREAM or VIPS_IS_STREAM edit "s/VIPS_([A-Z]+)_STREAMOU/VIPS_\1_TARGET_CUSTOM/g" edit "s/VIPS_([A-Z]+)_STREAMO/VIPS_\1_TARGET/g" edit "s/VIPS_([A-Z]+)_STREAMIU/VIPS_\1_SOURCE_CUSTOM/g" edit "s/VIPS_([A-Z]+)_STREAMI/VIPS_\1_SOURCE/g" edit "s/VIPS_([A-Z]+)_STREAM/VIPS_\1_CONNECTION/g" edit s/streamou/target_custom/g edit s/streamo/target/g edit s/streamiu/source_custom/g edit s/streami/source/g # various identifiers which also change edit s/is_a_stream/is_a_source/g edit s/find_load_stream/find_load_source/g edit s/find_save_stream/find_save_target/g edit s/new_from_stream/new_from_source/g edit s/write_to_stream/write_to_target/g edit s/vips_thumbnail_stream/vips_thumbnail_source/g # eg. vips_webpload_stream edit "s/vips_([a-z]+)load_stream/vips_\1load_source/g" # eg. vips_webpsave_stream edit "s/vips_([a-z]+)save_stream/vips_\1save_target/g" mv rename $i done ```
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if( !(image = vips_image_new_from_source( source, "",
"access", VIPS_ACCESS_SEQUENTIAL,
NULL )) )
vips_error_exit( NULL );
if( count_files( fd_dir ) != n_files )
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vips_error_exit( "%s: fd not closed after header read",
argv[1] );
/* We should be able to read a chunk near the top, then have the fd
* closed again.
*/
printf( "** crop1, avg ..\n" );
if( vips_crop( image, &x, 0, 0, image->Xsize, 10, NULL ) ||
vips_avg( x, &average, NULL ) )
vips_error_exit( NULL );
g_object_unref( x );
if( count_files( fd_dir ) != n_files )
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vips_error_exit( "%s: fd not closed after first read",
argv[1] );
/* We should be able to read again, a little further down, and have
* the input restarted and closed again.
*/
printf( "** crop2, avg ..\n" );
if( vips_crop( image, &x, 0, 20, image->Xsize, 10, NULL ) ||
vips_avg( x, &average, NULL ) )
vips_error_exit( NULL );
g_object_unref( x );
if( count_files( fd_dir ) != n_files )
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vips_error_exit( "%s: fd not closed after second read",
argv[1] );
/* Clean up, and we should still just have three open.
*/
printf( "** unref ..\n" );
g_object_unref( image );
experiment with renaming stream rename as VipsConnection, VipsSource, VipsTarget etc. see https://github.com/libvips/libvips/issues/1494#issuecomment-569498619 renamed with this script: ``` set -e edit() { sed -i -E "$1" rename } for i in $*; do cp $i rename edit s/VIPS_STREAMOU/VIPS_TARGET_CUSTOM/g edit s/VIPS_STREAMO/VIPS_TARGET/g edit s/VIPS_STREAMIU/VIPS_SOURCE_CUSTOM/g edit s/VIPS_STREAMI/VIPS_SOURCE/g edit s/VIPS_STREAM/VIPS_CONNECTION/g edit s/vips_streamou/vips_target_custom/g edit s/vips_streamo/vips_target/g edit s/vips_streamiu/vips_source_custom/g edit s/vips_streami/vips_source/g edit s/vips_stream/vips_connection/g edit s/VipsStreamou/VipsTargetCustom/g edit s/VipsStreamo/VipsTarget/g edit s/VipsStreamiu/VipsSourceCustom/g edit s/VipsStreami/VipsSource/g edit s/VipsStream/VipsConnection/g # eg. VIPS_TYPE_STREAM or VIPS_IS_STREAM edit "s/VIPS_([A-Z]+)_STREAMOU/VIPS_\1_TARGET_CUSTOM/g" edit "s/VIPS_([A-Z]+)_STREAMO/VIPS_\1_TARGET/g" edit "s/VIPS_([A-Z]+)_STREAMIU/VIPS_\1_SOURCE_CUSTOM/g" edit "s/VIPS_([A-Z]+)_STREAMI/VIPS_\1_SOURCE/g" edit "s/VIPS_([A-Z]+)_STREAM/VIPS_\1_CONNECTION/g" edit s/streamou/target_custom/g edit s/streamo/target/g edit s/streamiu/source_custom/g edit s/streami/source/g # various identifiers which also change edit s/is_a_stream/is_a_source/g edit s/find_load_stream/find_load_source/g edit s/find_save_stream/find_save_target/g edit s/new_from_stream/new_from_source/g edit s/write_to_stream/write_to_target/g edit s/vips_thumbnail_stream/vips_thumbnail_source/g # eg. vips_webpload_stream edit "s/vips_([a-z]+)load_stream/vips_\1load_source/g" # eg. vips_webpsave_stream edit "s/vips_([a-z]+)save_stream/vips_\1save_target/g" mv rename $i done ```
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g_object_unref( source );
printf( "** shutdown ..\n" );
vips_shutdown();
if( count_files( fd_dir ) != n_files )
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vips_error_exit( "%s: fd not closed after shutdown",
argv[1] );
return( 0 );
}