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Autodocs
 Libraries:
 layers.library
  BeginUpdate
  BehindLayer
  CreateBehindHookLayer
  CreateBehindLayer
  CreateUpfrontHookLayer
  CreateUpfrontLayer
  DeleteLayer
  DisposeLayerInfo
  DoHookClipRects
  EndUpdate
  FattenLayerInfo
  InitLayers
  InstallClipRegion
  InstallLayerHook
  InstallLayerInfoHook
  LockLayer
  LockLayerInfo
  LockLayers
  MoveLayer
  MoveLayerInFrontOf
  MoveSizeLayer
  NewLayerInfo
  ScrollLayer
  SizeLayer
  SwapBitsRastPortClipRect
  ThinLayerInfo
  UnlockLayer
  UnlockLayerInfo
  UnlockLayers
  UpfrontLayer
  WhichLayer
Include
GuruMeditation
Docs » Autodocs » layers.library » LockLayer

NAME

	LockLayer -- Lock layer to make changes to ClipRects.

SYNOPSIS

	LockLayer( dummy, l )
	           a0     a1
	void LockLayer( LONG, struct Layer *);

FUNCTION

	Make this layer unavailable for other tasks to use.
	If another task is already using this layer then wait for
	it to complete and then reserve the layer for your own use.
	(this function does the same thing as graphics.library/LockLayerRom)
	Note: if you wish to lock MORE THAN ONE layer at a time, you
	    must call LockLayerInfo() before locking those layers and
	    then call UnlockLayerInfo() when you have finished. This
	    is to prevent system "deadlocks".
	Further Note: while you hold the lock on a layer, Intuition will block
	    on operations such as windowsizing, dragging, menus, and depth
	    arranging windows in this layer's screen.  It is recommended that
	    YOU do not make Intuition function calls while the layer is locked.

INPUTS

	dummy - unused
	l - pointer to a layer

BUGS

SEE ALSO

UnlockLayer(), LockLayerInfo(), UnlockLayerInfo(), graphics.library/LockLayerRom(), <graphics/layers.h>, <graphics/clip.h>

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