diff options
Diffstat (limited to 'lib/libc_r/uthread/uthread_writev.c')
-rw-r--r-- | lib/libc_r/uthread/uthread_writev.c | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/lib/libc_r/uthread/uthread_writev.c b/lib/libc_r/uthread/uthread_writev.c deleted file mode 100644 index ca57607..0000000 --- a/lib/libc_r/uthread/uthread_writev.c +++ /dev/null @@ -1,230 +0,0 @@ -/* - * 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. 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 AUTHOR 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. - * - * $FreeBSD$ - * - */ -#include <sys/types.h> -#include <sys/fcntl.h> -#include <sys/uio.h> -#include <errno.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <pthread.h> -#include "pthread_private.h" - -__weak_reference(__writev, writev); - -ssize_t -_writev(int fd, const struct iovec * iov, int iovcnt) -{ - struct pthread *curthread = _get_curthread(); - int blocking; - int idx = 0; - int type; - ssize_t cnt; - ssize_t n; - ssize_t num = 0; - ssize_t ret; - struct iovec liov[20]; - struct iovec *p_iov = liov; - - /* Check if the array size exceeds to compiled in size: */ - if (iovcnt > (sizeof(liov) / sizeof(struct iovec))) { - /* Allocate memory for the local array: */ - if ((p_iov = (struct iovec *) - malloc(iovcnt * sizeof(struct iovec))) == NULL) { - /* Insufficient memory: */ - errno = ENOMEM; - return (-1); - } - } - - /* Copy the caller's array so that it can be modified locally: */ - memcpy(p_iov,iov,iovcnt * sizeof(struct iovec)); - - /* Lock the file descriptor for write: */ - if ((ret = _FD_LOCK(fd, FD_WRITE, NULL)) == 0) { - /* Get the read/write mode type: */ - type = _thread_fd_getflags(fd) & O_ACCMODE; - - /* Check if the file is not open for write: */ - if (type != O_WRONLY && type != O_RDWR) { - /* File is not open for write: */ - errno = EBADF; - _FD_UNLOCK(fd, FD_WRITE); - return (-1); - } - - /* Check if file operations are to block */ - blocking = ((_thread_fd_getflags(fd) & O_NONBLOCK) == 0); - - /* - * Loop while no error occurs and until the expected number - * of bytes are written if performing a blocking write: - */ - while (ret == 0) { - /* Perform a non-blocking write syscall: */ - n = __sys_writev(fd, &p_iov[idx], iovcnt - idx); - - /* Check if one or more bytes were written: */ - if (n > 0) { - /* - * Keep a count of the number of bytes - * written: - */ - num += n; - - /* - * Enter a loop to check if a short write - * occurred and move the index to the - * array entry where the short write - * ended: - */ - cnt = n; - while (cnt > 0 && idx < iovcnt) { - /* - * If the residual count exceeds - * the size of this vector, then - * it was completely written: - */ - if (cnt >= p_iov[idx].iov_len) - /* - * Decrement the residual - * count and increment the - * index to the next array - * entry: - */ - cnt -= p_iov[idx++].iov_len; - else { - /* - * This entry was only - * partially written, so - * adjust it's length - * and base pointer ready - * for the next write: - */ - p_iov[idx].iov_len -= cnt; - p_iov[idx].iov_base = - (char *)p_iov[idx].iov_base - + cnt; - cnt = 0; - } - } - } else if (n == 0) { - /* - * Avoid an infinite loop if the last iov_len is - * 0. - */ - while (idx < iovcnt && p_iov[idx].iov_len == 0) - idx++; - - if (idx == iovcnt) { - ret = num; - break; - } - } - - /* - * If performing a blocking write, check if the - * write would have blocked or if some bytes - * were written but there are still more to - * write: - */ - if (blocking && ((n < 0 && (errno == EWOULDBLOCK || - errno == EAGAIN)) || (n >= 0 && idx < iovcnt))) { - curthread->data.fd.fd = fd; - _thread_kern_set_timeout(NULL); - - /* Reset the interrupted operation flag: */ - curthread->interrupted = 0; - - _thread_kern_sched_state(PS_FDW_WAIT, - __FILE__, __LINE__); - - /* - * Check if the operation was - * interrupted by a signal - */ - if (curthread->interrupted) { - if (num > 0) { - /* Return partial success: */ - ret = num; - } else { - /* Return an error: */ - errno = EINTR; - ret = -1; - } - } - - /* - * If performing a non-blocking write, - * just return whatever the write syscall did: - */ - } else if (!blocking) { - /* A non-blocking call might return zero: */ - ret = n; - break; - - /* - * If there was an error, return partial success - * (if any bytes were written) or else the error: - */ - } else if (n < 0) { - if (num > 0) - ret = num; - else - ret = n; - - /* Check if the write has completed: */ - } else if (idx == iovcnt) - /* Return the number of bytes written: */ - ret = num; - } - _FD_UNLOCK(fd, FD_RDWR); - } - - /* If memory was allocated for the array, free it: */ - if (p_iov != liov) - free(p_iov); - - return (ret); -} - -ssize_t -__writev(int fd, const struct iovec *iov, int iovcnt) -{ - ssize_t ret; - - _thread_enter_cancellation_point(); - ret = _writev(fd, iov, iovcnt); - _thread_leave_cancellation_point(); - - return ret; -} |