diff options
Diffstat (limited to 'lib/libc_r/uthread/uthread_accept.c')
| -rw-r--r-- | lib/libc_r/uthread/uthread_accept.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/lib/libc_r/uthread/uthread_accept.c b/lib/libc_r/uthread/uthread_accept.c new file mode 100644 index 00000000000..371da568bf0 --- /dev/null +++ b/lib/libc_r/uthread/uthread_accept.c @@ -0,0 +1,108 @@ +/* + * 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. + * + */ +#include <errno.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <fcntl.h> +#ifdef _THREAD_SAFE +#include <pthread.h> +#include "pthread_private.h" + +int +accept(int fd, struct sockaddr * name, int *namelen) +{ + int ret; + + /* Lock the file descriptor: */ + if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) { + /* Enter a loop to wait for a connection request: */ + while ((ret = _thread_sys_accept(fd, name, namelen)) < 0) { + /* Check if the socket is to block: */ + if ((_thread_fd_table[fd]->flags & O_NONBLOCK) == 0 && (errno == EWOULDBLOCK || errno == EAGAIN)) { + /* Save the socket file descriptor: */ + _thread_run->data.fd.fd = fd; + _thread_run->data.fd.fname = __FILE__; + _thread_run->data.fd.branch = __LINE__; + + /* Set the timeout: */ + _thread_kern_set_timeout(NULL); + _thread_run->interrupted = 0; + + /* Schedule the next thread: */ + _thread_kern_sched_state(PS_FDR_WAIT, __FILE__, __LINE__); + + /* Check if the wait was interrupted: */ + if (_thread_run->interrupted) { + /* Return an error status: */ + errno = EINTR; + ret = -1; + break; + } + } else { + /* + * Another error has occurred, so exit the + * loop here: + */ + break; + } + } + + /* Check for errors: */ + if (ret < 0) { + } + /* Initialise the file descriptor table for the new socket: */ + else if (_thread_fd_table_init(ret) != 0) { + /* Quietly close the socket: */ + _thread_sys_close(ret); + + /* Return an error: */ + ret = -1; + } + /* + * If the parent socket was blocking, make sure that + * the new socket is also set blocking here (as the + * call to _thread_fd_table_init() above will always + * set the new socket flags to non-blocking, as that + * will be the inherited state of the new socket. + */ + if((ret > 0) && (_thread_fd_table[fd]->flags & O_NONBLOCK) == 0) + _thread_fd_table[ret]->flags &= ~O_NONBLOCK; + + /* Unlock the file descriptor: */ + _FD_UNLOCK(fd, FD_RDWR); + } + /* Return the socket file descriptor or -1 on error: */ + return (ret); +} +#endif |