diff options
Diffstat (limited to 'mit-pthreads/stdio/fwrite.c')
| -rw-r--r-- | mit-pthreads/stdio/fwrite.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/mit-pthreads/stdio/fwrite.c b/mit-pthreads/stdio/fwrite.c new file mode 100644 index 00000000000..5eada4ee84b --- /dev/null +++ b/mit-pthreads/stdio/fwrite.c @@ -0,0 +1,80 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * Copyright (c) 1993, 1994 Chris Provenzano. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +/*static char *sccsid = "from: @(#)fwrite.c 5.5 (Berkeley) 2/24/91";*/ +static char *rcsid = "$Id$"; +#endif /* LIBC_SCCS and not lint */ + +#include <pthread.h> +#include <stdio.h> +#include "local.h" +#include "fvwrite.h" + +/* + * Write `count' objects (each size `size') from memory to the given file. + * Return the number of whole objects written. + */ +size_t +fwrite(buf, size, count, fp) + const void *buf; + size_t size, count; + FILE *fp; +{ + struct __suio uio; + struct __siov iov; + size_t n; + + iov.iov_base = (void *)buf; + uio.uio_resid = iov.iov_len = n = count * size; + uio.uio_iov = &iov; + uio.uio_iovcnt = 1; + if (! n) + return(0); + + flockfile(fp); + + /* + * The usual case is success (__sfvwrite returns 0); + * skip the divide if this happens, since divides are + * generally slow and since this occurs whenever size==0. + */ + if (__sfvwrite(fp, &uio) == 0) + count = (n - uio.uio_resid) / size; + funlockfile(fp); + return(count); +} |