fd.h
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:4k
- /* ==== fd.h ============================================================
- * Copyright (c) 1993, 1994 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.
- *
- * $Id$
- *
- * Description : Basic fd header.
- *
- * 1.00 93/08/14 proven
- * -Started coding this file.
- *
- * 1.01 93/11/13 proven
- * -The functions readv() and writev() added
- */
- /*
- * New pthread types.
- */
- enum fd_type {
- FD_NT, /* Not tested */
- FD_NIU, /* Known to be not in use */
- FD_HALF_DUPLEX, /* Files, and seeking devices */
- FD_FULL_DUPLEX, /* pipes, sockets, drivers, ... */
- FD_TEST_HALF_DUPLEX, /* Redo machdep_sys_fcntl */
- FD_TEST_FULL_DUPLEX /* Redo machdep_sys_fcntl */
- };
- #define FD_READ 0x1
- #define FD_WRITE 0x2
- #define FD_RDWR (FD_READ | FD_WRITE)
- union fd_data {
- void *ptr;
- int i;
- };
- struct timespec;
- struct iovec;
- struct fd_ops {
- pthread_ssize_t (*write) __P_((union fd_data, int, const void *,
- size_t, struct timespec *));
- pthread_ssize_t (*read) __P_((union fd_data, int, void *, size_t,
- struct timespec *));
- int (*close)();
- int (*fcntl)();
- int (*writev) __P_((union fd_data, int,
- const struct iovec *,
- int, struct timespec *));
- int (*readv) __P_((union fd_data, int,
- const struct iovec *,
- int, struct timespec *));
- off_t (*seek)();
- int use_kfds;
- };
- struct fd_table_entry {
- struct pthread_queue r_queue;
- struct pthread_queue w_queue;
- struct pthread *r_owner;
- struct pthread *w_owner;
- pthread_mutex_t mutex;
- struct fd_table_entry *next;
- struct fd_ops *ops;
- enum fd_type type;
- int r_lockcount; /* Count for FILE read locks */
- int w_lockcount; /* Count for FILE write locks */
- int count;
- /* data that needs to be passed to the type dependent fd */
- int flags;
- union fd_data fd;
- };
- /*
- * Globals
- */
- #if defined(PTHREAD_KERNEL)
- extern struct fd_table_entry **fd_table;
- extern int dtablesize;
- #endif
- /*
- * New functions
- */
- __BEGIN_DECLS
- #if defined(PTHREAD_KERNEL)
- #endif
- __END_DECLS