diff options
Diffstat (limited to 'lib/libc_r/uthread/uthread_readv.c')
| -rw-r--r-- | lib/libc_r/uthread/uthread_readv.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/lib/libc_r/uthread/uthread_readv.c b/lib/libc_r/uthread/uthread_readv.c new file mode 100644 index 00000000000..77fbf60fd03 --- /dev/null +++ b/lib/libc_r/uthread/uthread_readv.c @@ -0,0 +1,94 @@ +/* + * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au> + * 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 John Birrell. + * 4. Neither the name of the author nor the names of any co-contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL 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. + * + * $Id: uthread_readv.c,v 1.1 1998/08/27 09:01:16 d Exp $ + * $OpenBSD: uthread_readv.c,v 1.1 1998/08/27 09:01:16 d Exp $ + * + */ +#include <sys/types.h> +#include <sys/fcntl.h> +#include <sys/uio.h> +#include <errno.h> +#include <unistd.h> +#ifdef _THREAD_SAFE +#include <pthread.h> +#include "pthread_private.h" + +ssize_t +readv(int fd, const struct iovec * iov, int iovcnt) +{ + int ret; + int type; + + /* Lock the file descriptor for read: */ + if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) { + /* Get the read/write mode type: */ + type = _thread_fd_table[fd]->flags & O_ACCMODE; + + /* Check if the file is not open for read: */ + if (type != O_RDONLY && type != O_RDWR) { + /* File is not open for read: */ + errno = EBADF; + _FD_UNLOCK(fd, FD_READ); + return (-1); + } + + /* Perform a non-blocking readv syscall: */ + while ((ret = _thread_sys_readv(fd, iov, iovcnt)) < 0) { + if ((_thread_fd_table[fd]->flags & O_NONBLOCK) == 0 && + (errno == EWOULDBLOCK || errno == EAGAIN)) { + _thread_run->data.fd.fd = fd; + _thread_kern_set_timeout(NULL); + + /* Reset the interrupted operation flag: */ + _thread_run->interrupted = 0; + + _thread_kern_sched_state(PS_FDR_WAIT, + __FILE__, __LINE__); + + /* + * Check if the operation was + * interrupted by a signal + */ + if (_thread_run->interrupted) { + errno = EINTR; + ret = -1; + break; + } + } else { + break; + } + } + _FD_UNLOCK(fd, FD_READ); + } + return (ret); +} +#endif |