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__wait_packet.c
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1996-09-28
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103 lines
/*
* This file is part of ixemul.library for the Amiga.
* Copyright (C) 1991, 1992 Markus M. Wild
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* __wait_packet.c,v 1.1.1.1 1994/04/04 04:30:14 amiga Exp
*
* __wait_packet.c,v
* Revision 1.1.1.1 1994/04/04 04:30:14 amiga
* Initial CVS check in.
*
* Revision 1.3 1992/07/04 19:08:41 mwild
* change to new ix_sleep format, add wmesg-string
*
* Revision 1.2 1992/05/18 11:58:15 mwild
* use dp_Port field, NT_REPLYMSG is not reliable
*
* Revision 1.1 1992/05/14 19:55:40 mwild
* Initial revision
*
*/
#define _KERNEL
#include "ixemul.h"
#include "kprintf.h"
#include <signal.h>
/* I'm using dp_Port as an indicator whether this packet is
free. If in use, this field can't be 0. */
#define PACKET_IN_USE(sp) (sp->sp_Pkt.dp_Port)
void
__wait_sync_packet(struct StandardPacket *sp)
{
struct StandardPacket *prw;
int omask;
/* this is the synchronous way of dealing with packets that may
* arrive at a port. */
if (! PACKET_IN_USE (sp)) return;
omask = syscall (SYS_sigsetmask, ~0);
for (;;)
{
if ((prw = GetPacket(u.u_sync_mp)))
{
PACKET_IN_USE (prw) = 0;
if (prw == sp) break;
}
else
{
Wait(1<<u.u_sync_mp->mp_SigBit);
}
}
syscall (SYS_sigsetmask, omask);
}
void
__wait_select_packet(struct StandardPacket *sp)
{
struct StandardPacket *prw;
int omask;
/* this is the synchronous way of dealing with packets that may
* arrive at a port. */
if (! PACKET_IN_USE (sp)) return;
omask = syscall (SYS_sigsetmask, ~0);
for (;;)
{
if ((prw = GetPacket(u.u_select_mp)))
{
PACKET_IN_USE (prw) = 0;
if (prw == sp) break;
}
else
{
Wait(1<<u.u_select_mp->mp_SigBit);
}
}
syscall (SYS_sigsetmask, omask);
}