projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 90269d47 | 1 | /* ==== fd.h ============================================================ |
| 56a62443 | 2 | * Copyright (c) 1993 by Chris Provenzano, proven@mit.edu |
| 30b08b75 AM |
3 | * All rights reserved. |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 56a62443 CP |
15 | * This product includes software developed by Chris Provenzano. |
| 16 | * 4. The name of Chris Provenzano may not be used to endorse or promote | |
| 17 | * products derived from this software without specific prior written | |
| 18 | * permission. | |
| 30b08b75 | 19 | * |
| 56a62443 | 20 | * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``AS IS'' AND |
| 30b08b75 AM |
21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 56a62443 CP |
23 | * ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO BE LIABLE FOR ANY |
| 24 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 25 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 26 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
| 27 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 30 | * SUCH DAMAGE. | |
| 31 | * | |
| 32 | * Description : Basic fd header. | |
| 33 | * | |
| 34 | * 1.00 93/08/14 proven | |
| 35 | * -Started coding this file. | |
| 36 | * | |
| 37 | * 1.01 93/11/13 proven | |
| 38 | * -The functions readv() and writev() added | |
| 30b08b75 | 39 | */ |
| 56a62443 | 40 | |
| 90269d47 AM |
41 | /* |
| 42 | * New pthread types. | |
| 43 | */ | |
| 44 | enum fd_type { | |
| 45 | FD_NT, /* Not tested */ | |
| 46 | FD_NIU, /* Known to be not in use */ | |
| 47 | FD_HALF_DUPLEX, /* Files, and seeking devices */ | |
| 48 | FD_FULL_DUPLEX /* pipes, sockets, drivers, ... */ | |
| 49 | }; | |
| 50 | ||
| 51 | ||
| 52 | #define FD_READ 0x1 | |
| 53 | #define FD_WRITE 0x2 | |
| 54 | #define FD_RDWR (FD_READ | FD_WRITE) | |
| 55 | ||
| 56 | struct fd_ops { | |
| 57 | int (*write)(); | |
| 58 | int (*read)(); | |
| 59 | int (*close)(); | |
| 60 | int (*fcntl)(); | |
| 90269d47 AM |
61 | int (*writev)(); |
| 62 | int (*readv)(); | |
| 774b174b | 63 | int (*seek)(); |
| 90269d47 AM |
64 | }; |
| 65 | ||
| 66 | union fd_data { | |
| 67 | void *ptr; | |
| 68 | int i; | |
| 69 | }; | |
| 70 | ||
| 71 | struct fd_table_entry { | |
| 72 | struct pthread_queue r_queue; | |
| 73 | struct pthread_queue w_queue; | |
| 74 | struct pthread *r_owner; | |
| 75 | struct pthread *w_owner; | |
| 76 | semaphore lock; | |
| 77 | struct fd_table_entry *next; | |
| 78 | struct fd_ops *ops; | |
| 79 | enum fd_type type; | |
| 80 | int lockcount; /* Count for FILE locks */ | |
| 81 | int count; | |
| 82 | ||
| 83 | /* data that needs to be passed to the type dependent fd */ | |
| 84 | int flags; | |
| 85 | union fd_data fd; | |
| 86 | }; | |
| 87 | ||
| 88 | /* | |
| 89 | * Important data structure | |
| 90 | */ | |
| 91 | extern struct fd_table_entry *fd_table[]; | |
| 92 | extern int dtablesize; | |
| 93 | ||
| 94 | /* | |
| 95 | * New functions | |
| 96 | */ | |
| 97 | ||
| 98 | __BEGIN_DECLS | |
| 99 | ||
| 100 | #if defined(PTHREAD_KERNEL) | |
| 101 | ||
| 102 | #endif | |
| 103 | ||
| 104 | __END_DECLS |