/* $OpenBSD: uthread_recvmsg.c,v 1.9 2009/04/11 20:26:58 jakemsr Exp $ */ /* * Copyright (c) 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 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: uthread_recvmsg.c,v 1.4 1999/08/28 00:03:44 peter Exp $ */ #include <errno.h> #include <sys/types.h> #include <sys/socket.h> #include <fcntl.h> #ifdef _THREAD_SAFE #include <pthread.h> #include "pthread_private.h" ssize_t recvmsg(int fd, struct msghdr *msg, int flags) { struct pthread *curthread = _get_curthread(); ssize_t ret; /* This is a cancellation point: */ _thread_enter_cancellation_point(); if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) { while ((ret = _thread_sys_recvmsg(fd, msg, flags)) < 0) { if (!(_thread_fd_table[fd]->status_flags->flags & O_NONBLOCK) && !(flags & MSG_DONTWAIT) && ((errno == EWOULDBLOCK) || (errno == EAGAIN))) { curthread->data.fd.fd = fd; /* Set the timeout: */ _thread_kern_set_timeout(NULL); curthread->interrupted = 0; curthread->closing_fd = 0; _thread_kern_sched_state(PS_FDR_WAIT, __FILE__, __LINE__); /* Check if the wait was interrupted: */ if (curthread->interrupted) { /* Return an error status: */ errno = EINTR; ret = -1; break; } else if (curthread->closing_fd) { /* Return an error status: */ errno = EBADF; ret = -1; break; } } else { ret = -1; break; } } _FD_UNLOCK(fd, FD_READ); } /* No longer in a cancellation point: */ _thread_leave_cancellation_point(); return (ret); } #endif