/** * 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 ); }