diff options
author | Peter Galbavy <peter@cvs.openbsd.org> | 1998-07-21 13:20:29 +0000 |
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committer | Peter Galbavy <peter@cvs.openbsd.org> | 1998-07-21 13:20:29 +0000 |
commit | 43b686d61558c0957f1779c747214ddef20a2252 (patch) | |
tree | 99fb41dbccee40683a84fe98aa3c6a9784911bf2 /lib/libpthread/pthreads/writev.c | |
parent | ea12e8eb2f8d4c89e854d9381f85ce8fb4688ad0 (diff) |
Complete initial import from mySQL 3.22.4 (mit-pthreads/).
Lots of dross to move and remove yet.
At minimum:
o remove GNU config and GNU Makefiles
o build arch directory and migrate away machdep/
o rebuild BSD Makefiles
o move notes etc. into doc/
Diffstat (limited to 'lib/libpthread/pthreads/writev.c')
-rw-r--r-- | lib/libpthread/pthreads/writev.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/libpthread/pthreads/writev.c b/lib/libpthread/pthreads/writev.c new file mode 100644 index 00000000000..9bc3cba870d --- /dev/null +++ b/lib/libpthread/pthreads/writev.c @@ -0,0 +1,89 @@ +/* ==== writev.c ============================================================ + * Copyright (c) 1995 by Chris Provenzano, proven@mit.edu + * All rights reserved. + * + * 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 Chris Provenzano. + * 4. The name of Chris Provenzano may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO 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. + * + * Description : Implementation of writev(). + * + * 1.00 95/06/19 proven + * -Started coding this file. + */ + +#ifndef lint +static const char rcsid[] = "$Id: writev.c,v 1.1 1998/07/21 13:20:26 peter Exp $"; +#endif + +#include "config.h" + +#ifndef HAVE_SYSCALL_WRITEV + +#include <errno.h> +#include <unistd.h> +#include <sys/uio.h> +#include <sys/types.h> + +/* ========================================================================== + * machdep_sys_writev() + * + * modified from the GNU C Library posix/writev.c + */ +int machdep_sys_writev(int fd, struct iovec * vector, int count) +{ + size_t bytes, i; + char *buffer; + int ret; + + /* Find the total number of bytes to be written. */ + for (bytes = 0, i = 0; i < count; ++i) + bytes += vector[i].iov_len; + + if (bytes) { + /* + * Allocate a temporary buffer to hold the data. + * Don't use alloca because threads tend to have smaller stacks. + */ + if ((buffer = (char *)malloc(bytes)) == NULL) { + return(-ENOMEM); + } + /* Copy the data from memory specified by VECTOR to BUFFER */ + for (ret = 0, i = 0; i < count; ++i) { + memcpy(buffer + ret, vector[i].iov_base, vector[i].iov_len); + ret += vector[i].iov_len; + } + } else { + buffer = NULL; + } + + ret = (int)machdep_sys_write(fd, buffer, bytes); + if (buffer) + free(buffer); + return(ret); +} + +#endif |