#define MA_RESOURCE_MANAGER_DATA_SOURCE_FLAG_ASYNC 0x00000004 /* When set, the resource manager will load the data source asynchronously. */
#define MA_RESOURCE_MANAGER_DATA_SOURCE_FLAG_WAIT_INIT 0x00000008 /* When set, waits for initialization of the underlying data source before returning from ma_resource_manager_data_source_init(). */