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71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/*
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* This file is part of ixemul.library for the Amiga.
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* Copyright (C) 1991, 1992 Markus M. Wild
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* get_file.c,v 1.1.1.1 1994/04/04 04:30:58 amiga Exp
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*
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* get_file.c,v
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* Revision 1.1.1.1 1994/04/04 04:30:58 amiga
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* Initial CVS check in.
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*
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* Revision 1.2 1992/08/09 20:45:35 amiga
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* add new sleep parameter
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*
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* Revision 1.1 1992/05/14 19:55:40 mwild
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* Initial revision
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*
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*/
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#define _KERNEL
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#include "ixemul.h"
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int __get_file (struct file *f)
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{
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int res = 0;
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Forbid ();
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for (;;)
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{
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if (!(f->f_sync_flags & FSFF_LOCKED))
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{
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f->f_sync_flags |= FSFF_LOCKED;
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/* got it ! */
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break;
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}
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f->f_sync_flags |= FSFF_WANTLOCK;
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if (ix_sleep((caddr_t)&f->f_sync_flags, "get_file") < 0) /* error in sleep, might be INTR */
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{
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res = -1;
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break;
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}
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/* have to always recheck whether we really got the lock */
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}
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Permit ();
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return res;
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}
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void __release_file (struct file *f)
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{
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Forbid ();
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if (f->f_sync_flags & FSFF_WANTLOCK)
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ix_wakeup ((u_int)& f->f_sync_flags);
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f->f_sync_flags &= ~(FSFF_WANTLOCK|FSFF_LOCKED);
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Permit ();
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}
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