/**
* vips_cache_operation_lookup:
* @operation: (transfer none): pointer to operation to lookup
*
* Look up an unbuilt @operation in the cache. If we get a hit, ref and
* return the old operation. If there's no hit, return NULL.
*
* Returns: (transfer full): the cache hit, if any.
*/
VipsOperation *
vips_cache_operation_lookup( VipsOperation *operation )
{
VipsOperationCacheEntry *hit;
VipsOperation *result;
g_assert( VIPS_IS_OPERATION( operation ) );
g_assert( !VIPS_OBJECT( operation )->constructed );
#ifdef VIPS_DEBUG
printf( "vips_cache_operation_lookup: " );
vips_object_print_dump( VIPS_OBJECT( operation ) );
#endif /*VIPS_DEBUG*/
g_mutex_lock( vips_cache_lock );
result = NULL;
if( (hit = g_hash_table_lookup( vips_cache_table, operation )) ) {
if( vips__cache_trace ) {
printf( "vips cache*: " );
vips_object_print_summary( VIPS_OBJECT( operation ) );
}
result = hit->operation;
vips_cache_ref( result );
}
g_mutex_unlock( vips_cache_lock );
return( result );
}
static void
vips_cache_insert( VipsOperation *operation )
{
VipsOperationCacheEntry *entry = g_new( VipsOperationCacheEntry, 1 );
entry->operation = operation;
entry->time = 0;
entry->invalidate_id = 0;
g_hash_table_insert( vips_cache_table, operation, entry );
vips_cache_ref( operation );
/* If the operation signals "invalidate", we must drop it.
*/
entry->invalidate_id = g_signal_connect( operation, "invalidate",
G_CALLBACK( vips_cache_remove ), NULL );
}
/**
* 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 );
}
