#include <arpbase.h>
#include <arp_proto.h>
#include "Launch.h"
#include "LaunchPriv.h"


/*
 *	NAME
 *		ChildEntry -- used when starting processes.
 *
 *	SYNOPSIS
 *		ChildEntry ()
 *
 *	FUNCTION
 *		Call the process' entry point with its data.
 *
 *	DESCRIPTION
 *		It load the A4 register, find the process pair (parent/child),
 *		allocate the child's kill signal and then call the child entry
 *		point with the data given by the parent.  On exit, it clears
 *		the entry point and signal the parent.
 *
 *	INPUT
 *		None.
 *
 *	OUTPUT
 *		None.
 *
 *	NOTE
 *		We currently use the break C signal as the kill signal.  This
 *		let the user kill the process himself (if anything should go
 *		wrong...).
 *
 *	HISTORY
 *		1992/09/06	Pierre Baillargeon		Creation
 *		1992/09/07	Pierre Baillargeon		Correction
 *					Now, the node removal and memory freeing is done
 *					in the parent.  Otherwise the parent signal bit
 *					would not always be freed.
 *
 *	SEE ALSO
 *		StartProcess()
 */

void __saveds ChildEntry (void)
{
	struct ProcPair *pp;
	struct Process *Proc;

	Proc = (struct Process *)FindTask (NULL);
	Wait (1L << Proc->pr_MsgPort.mp_SigBit);

	Forbid ();
	pp = IsChild (Proc);
	Permit ();

	if (pp)
	{
		pp->pp_ChildBit = AllocSignal (KILL_PROCESS_FLAG);
		pp->pp_ChildEntry (pp->pp_ChildData);
		Forbid ();
		pp->pp_ChildEntry = NULL;
		Signal (pp->pp_Parent, 1L << pp->pp_ParentBit);
	}
}