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- head 1.2;
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- version39-41:1.1;
- locks;
- comment @ * @;
-
-
- 1.2
- date 92.08.09.20.40.39; author amiga; state Exp;
- branches;
- next 1.1;
-
- 1.1
- date 92.05.14.19.55.40; author mwild; state Exp;
- branches;
- next ;
-
-
- desc
- @lowlevel asynchronous write function for plain files
- @
-
-
- 1.2
- log
- @add a cast to get rid of a warning
- @
- text
- @/*
- * 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.
- *
- * $Id: __write.c,v 1.1 1992/05/14 19:55:40 mwild Exp $
- *
- * $Log: __write.c,v $
- * Revision 1.1 1992/05/14 19:55:40 mwild
- * Initial revision
- *
- */
-
- #define KERNEL
- #include "ixemul.h"
-
- #undef DEBUG
-
- #ifdef DEBUG
- #define DP(a) kprintf a
- #else
- #define DP(a)
- #endif
-
- int
- __write(struct file *f, char *buf, int len)
- {
- int err=errno, res = 0;
- int omask;
-
- if (HANDLER_NIL(f)) return len;
-
- omask = syscall (SYS_sigsetmask, ~0);
- __get_file (f);
- /* get results of last call */
- __wait_packet(&f->f_sp);
- res = LastResult(f);
- if (res == -1)
- err = __ioerr_to_errno(LastError(f));
- else
- {
- /* we have no way of telling, whether the last written number
- * of characters was correct or not, we just say, if it wasn't
- * an error (res == -1), than it's ok to continue writing to this
- * file. We have to return 'len' instead of 'res', because the
- * user normally expects to say "while write(fd,buf,len)==len"
- * as a check whether there was an error with write() or not */
-
- res = len;
-
- if (len > 0)
- {
- /* right append-mode means, before each write do an explicit
- * seek to eof */
- if (f->f_flags & FAPPEND)
- {
- SendPacket3(f,__rwport,ACTION_SEEK,f->f_fh->fh_Arg1,0,OFFSET_END);
- __wait_packet(&f->f_sp);
- }
-
- /* We need to save a copy of this buffer in our local buffer,
- * because the caller is free to change buf after this function
- * returns. */
- if (len > f->f_async_len)
- {
- DP(("asl=%ld,l=%ld,b=$%lx ",f->f_async_len, len,f->f_async_buf));
- f->f_async_len = len*2; /* don't waste too much memory */
- if (! (f->f_async_buf = (char *)krealloc (f->f_async_buf, f->f_async_len)))
- {
- f->f_async_len = 0;
- /* in that case resort to sync write */
- __release_file (f);
- syscall (SYS_sigsetmask, omask);
- errno = err;
- return __sync_write (f, buf, len);
- }
- }
- bcopy (buf, f->f_async_buf, len);
- SendPacket3(f,__rwport,ACTION_WRITE,f->f_fh->fh_Arg1,(long)f->f_async_buf,len);
- }
- }
-
- __release_file (f);
- syscall (SYS_sigsetmask, omask);
- errno = err;
- return res;
- }
- @
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @d19 1
- a19 1
- * $Id$
- d21 4
- a24 1
- * $Log$
- d81 1
- a81 1
- if (! (f->f_async_buf = krealloc (f->f_async_buf, f->f_async_len)))
- @
-