/**
* vips_cache_operation_add:
* @operation: (transfer none): pointer to operation to add
*
* Add a built operation to the cache. The cache will ref the operation.
*/
void
vips_cache_operation_add( VipsOperation *operation )
{
g_assert( VIPS_OBJECT( operation )->constructed );
g_mutex_lock( vips_cache_lock );
/* If two threads call the same operation at the same time,
* we can get multiple adds. Let the first one win. See
* https://github.com/jcupitt/libvips/pull/181
*/
if( !g_hash_table_lookup( vips_cache_table, operation ) ) {
VipsOperationFlags flags =
vips_operation_get_flags( operation );
gboolean nocache = flags & VIPS_OPERATION_NOCACHE;
/* Has to be after _build() so we can see output args.
*/
if( vips__cache_trace ) {
if( nocache )
printf( "vips cache : " );
else
printf( "vips cache+: " );
vips_object_print_summary( VIPS_OBJECT( operation ) );
}
if( !nocache )
vips_cache_insert( operation );
}
g_mutex_unlock( vips_cache_lock );
vips_cache_trim();
}
/**
* vips_cache_operation_buildp: (skip)
* @operation: pointer to operation to lookup
*
* Look up @operation in the cache. If we get a hit, unref @operation, ref the
* old one and return that through the argument pointer.
*
* If we miss, build and add @operation.
*
* Returns: 0 on success, or -1 on error.
*/
int
vips_cache_operation_buildp( VipsOperation **operation )
{
VipsOperation *hit;
g_assert( VIPS_IS_OPERATION( *operation ) );
#ifdef VIPS_DEBUG
printf( "vips_cache_operation_build: " );
vips_object_print_dump( VIPS_OBJECT( *operation ) );
#endif /*VIPS_DEBUG*/
vips_cache_trim();
g_mutex_lock( vips_cache_lock );
if( (hit = g_hash_table_lookup( vips_cache_table, *operation )) ) {
if( vips__cache_trace ) {
printf( "vips cache-: " );
vips_object_print_summary( VIPS_OBJECT( hit ) );
}
/* Ref before unref in case *operation == hit.
*/
vips_cache_ref( hit );
g_object_unref( *operation );
*operation = hit;
}
g_mutex_unlock( vips_cache_lock );
if( !hit ) {
if( vips_object_build( VIPS_OBJECT( *operation ) ) )
return( -1 );
/* Has to be after _build() so we can see output args.
*/
if( vips__cache_trace ) {
if( vips_operation_get_flags( *operation ) &
VIPS_OPERATION_NOCACHE )
printf( "vips cache : " );
else
printf( "vips cache+: " );
vips_object_print_summary( VIPS_OBJECT( *operation ) );
}
g_mutex_lock( vips_cache_lock );
if( !(vips_operation_get_flags( *operation ) &
VIPS_OPERATION_NOCACHE) ) {
vips_cache_ref( *operation );
g_hash_table_insert( vips_cache_table,
*operation, *operation );
}
g_mutex_unlock( vips_cache_lock );
}
return( 0 );
}
