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__lock.c
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C/C++ Source or Header
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1996-09-28
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2KB
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78 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.
*
* __lock.c,v 1.1.1.1 1994/04/04 04:30:10 amiga Exp
*
* __lock.c,v
* Revision 1.1.1.1 1994/04/04 04:30:10 amiga
* Initial CVS check in.
*
* Revision 1.1 1992/05/14 19:55:40 mwild
* Initial revision
*
*/
#define _KERNEL
#include <string.h>
#include "ixemul.h"
struct lock_vec {
int mode;
int resolve_last;
};
static int
__lock_func (struct StandardPacket *sp, struct MsgPort *handler,
BPTR parent_lock,
BSTR name,
struct lock_vec *lv, int *no_error)
{
sp->sp_Pkt.dp_Type = ACTION_LOCATE_OBJECT;
sp->sp_Pkt.dp_Arg1 = parent_lock;
sp->sp_Pkt.dp_Arg2 = name;
sp->sp_Pkt.dp_Arg3 = lv->mode;
PutPacket (handler, sp);
__wait_sync_packet (sp);
*no_error = sp->sp_Pkt.dp_Res1 > 0;
/* continue if we failed because of symlink - reference ? */
return lv->resolve_last;
}
BPTR __lock (char *name, int mode)
{
struct lock_vec lv;
lv.mode = mode;
lv.resolve_last = 1;
return __plock (name, __lock_func, &lv);
}
BPTR __llock (char *name, int mode)
{
struct lock_vec lv;
lv.mode = mode;
lv.resolve_last = 0;
return __plock (name, __lock_func, &lv);
}