NAME
    LockLayerRom -- Lock layer structure by rom(gfx lib) code.

SYNOPSIS
    LockLayerRom( layer )
                   a5

    void LockLayerRom( struct layer * );

FUNCTION
    Return when the layer is locked and no other task may
    alter the cliprect structure in the layer structure.
    This call does not destroy any registers.
    This call nests so that callers in this chain will not lock
    themselves out.
    Do not have the layer locked during a call to intuition.
    There is a potential deadlock problem here, if intuition
    needs to get other locks as well.
    Having the layer locked prevents other tasks from using the
    layer library functions, most notably intuition itself. So
    be brief.
    layers.library's locklayer is identical to locklayerrom.

INPUTS
    layer - pointer to layer structure

RESULTS
    The layer is locked and the task can render assuming the
    ClipRects will not change out from underneath it until
    an unlocklayerrom is called.

SEE ALSO
    unlocklayerrom() layers.library/locklayer() graphics/clip.h