#    (C) 1995-96 AROS - The Amiga Replacement OS
#    $Id: permit.s,v 1.7 1996/10/24 15:51:12 aros Exp $
#    $Log: permit.s,v $
#    Revision 1.7  1996/10/24 15:51:12  aros
#    Use the official AROS macros over the __AROS versions.
#
#    Revision 1.6  1996/10/23 08:04:25  aros
#    Use generated offsets which makes porting much easier
#
#    Revision 1.5  1996/09/11 16:54:28	digulla
#    Always use __AROS_SLIB_ENTRY() to access shared external symbols, because
#	some systems name an external symbol "x" as "_x" and others as "x".
#	(The problem arises with assembler symbols which might differ)
#
#    Revision 1.4  1996/08/23 16:49:21	digulla
#    With some systems, .align 16 aligns to 64K instead of 16bytes. Therefore
#	I replaced it with .balign which does what we want.
#
#    Revision 1.3  1996/08/13 14:03:19	digulla
#    Added standard headers
#
#    Revision 1.2  1996/08/01 17:41:25	digulla
#    Added standard header for all files
#
#    Desc:
#    Lang:

#*****************************************************************************
#
#   NAME
#	AROS_LH0(void, Permit,
#
#   LOCATION
#	struct ExecBase *, SysBase, 23, Exec)
#
#   FUNCTION
#
#   INPUTS
#
#   RESULT
#
#   NOTES
#
#   EXAMPLE
#
#   BUGS
#
#   SEE ALSO
#
#   INTERNALS
#
#   HISTORY
#
#******************************************************************************

	.include "machine.i"

	.text
	.balign 16
	.globl	_Exec_Permit
	.type	_Exec_Permit,@function
_Exec_Permit:
	/* Preserve all registers */
	pushl	%edx
	pushl	%eax

	/* Get SysBase */
	movl	12(%esp),%edx

	/* Decrement and test TDNestCnt */
	decb	TDNestCnt(%edx)
	jge	noswch

	/* Is there a delayed switch pending and are taskswitches allowed? */
	cmpb	$0,AttnResched(%edx)
	jge	noswch
	cmpb	$0,IDNestCnt(%edx)
	jge	noswch

	/* Clear delayed switch bit and do the delayed switch */
	andb	$127,AttnResched(%edx)
	leal	Switch(%edx),%eax
	pushl	%edx
	call	*%eax
	addl	$4,%esp

	/* Restore registers and return */
noswch: popl	%eax
	popl	%edx
	ret