rasIsBusy

BOOL32 __stdcall rasIsBusy(IPGC CachePtr);

function rasIsBusy(CachePtr: IPGC): LongBool; stdcall;

Purpose. Report whether the page cache's background render/update pipeline is currently busy.

Description. A plain accessor for C.Busy — set False by rasInitialize; this chapter did not trace every site that sets it True (the tile-render dispatch path, Rendering, Painting, and the Tile Pipeline), only confirmed the getter itself is a simple, real field read.

Parameters.

Return value. Current Busy state; False if CachePtr doesn't resolve.

C# (P/Invoke)

[return: MarshalAs(UnmanagedType.Bool)]