Mercurial > ecos

annotate packages/net/tcpip/current/src/lib/select.c @ 97:ced4577552cd ecos-sw-2000-06-06

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Merge from eCos master repository on 2000-06-06-08:44:00-BST
author jlarmour
date Tue, 06 Jun 2000 08:39:36 +0000
parents
children 02ea4320376c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
97
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
1 //==========================================================================
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
2 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
3 // lib/select.c
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
4 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
5 // 'select()' system call
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
6 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
7 //==========================================================================
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
8 //####COPYRIGHTBEGIN####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
9 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
10 // -------------------------------------------
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
11 // The contents of this file are subject to the Red Hat eCos Public License
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
12 // Version 1.1 (the "License"); you may not use this file except in
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
13 // compliance with the License. You may obtain a copy of the License at
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
14 // http://www.redhat.com/
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
15 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
16 // Software distributed under the License is distributed on an "AS IS"
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
18 // License for the specific language governing rights and limitations under
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
19 // the License.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
20 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
21 // The Original Code is eCos - Embedded Configurable Operating System,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
22 // released September 30, 1998.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
23 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
24 // The Initial Developer of the Original Code is Red Hat.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
25 // Portions created by Red Hat are
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
27 // All Rights Reserved.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
28 // -------------------------------------------
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
29 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
30 //####COPYRIGHTEND####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
31 //####BSDCOPYRIGHTBEGIN####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
32 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
33 // -------------------------------------------
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
34 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
35 // Portions of this software may have been derived from OpenBSD or other sources,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
36 // and are covered by the appropriate copyright disclaimers included herein.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
37 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
38 // -------------------------------------------
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
39 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
40 //####BSDCOPYRIGHTEND####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
41 //==========================================================================
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
42 //#####DESCRIPTIONBEGIN####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
43 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
44 // Author(s): gthomas
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
45 // Contributors: gthomas
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
46 // Date: 2000-01-10
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
47 // Purpose:
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
48 // Description: eCos implementation of 'select()' system call
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
49 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
50 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
51 //####DESCRIPTIONEND####
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
52 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
53 //==========================================================================
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
54
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
55 #include <sys/param.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
56 #include <cyg/io/file.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
57 #include <cyg/kernel/kapi.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
58 #include <sys/select.h>
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
59
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
60 static cyg_flag_t select_flag;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
61 static cyg_bool select_flag_init = false;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
62 #define SELECT_WAKE 0x01
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
63 #define SELECT_ABORT 0x02
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
64
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
65 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
66 // Private function which does all the work for 'select()'
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
67 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
68 static int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
69 _cyg_select(int nfd, fd_set *in, fd_set *out, fd_set *ex,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
70 struct timeval *tv, cyg_bool_t abortable)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
71 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
72 int fd, mode, num, ticks;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
73 struct file *fp;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
74 fd_set in_res, out_res, ex_res; // Result sets
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
75 fd_set *selection[3], *result[3];
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
76 cyg_tick_count_t now, then;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
77 int mode_type[] = {FREAD, FWRITE, 0};
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
78 cyg_flag_value_t flag, wait_flag;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
79
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
80 // Note: since this is called by application programs, it needs no protection
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
81 if (!select_flag_init) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
82 select_flag_init = true;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
83 cyg_flag_init(&select_flag);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
84 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
85 wait_flag = SELECT_WAKE;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
86 if (abortable) wait_flag |= SELECT_ABORT;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
87 FD_ZERO(&in_res);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
88 FD_ZERO(&out_res);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
89 FD_ZERO(&ex_res);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
90 // Set up sets
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
91 selection[0] = in; result[0] = &in_res;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
92 selection[1] = out; result[1] = &out_res;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
93 selection[2] = ex; result[2] = &ex_res;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
94 // Compute end time
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
95 if (tv) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
96 now = cyg_current_time();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
97 ticks = (tv->tv_sec * 100) + (tv->tv_usec / 10000);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
98 then = now + ticks;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
99 } else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
100 then = 0; // Compiler warnings :-(
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
101 ticks = 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
102 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
103 // Scan sets for possible I/O until something found, timeout or error.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
104 while (true) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
105 num = 0; // Total file descriptors "ready"
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
106 for (mode = 0; mode < 3; mode++) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
107 if (selection[mode]) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
108 for (fd = 0; fd < nfd; fd++) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
109 if (FD_ISSET(fd, selection[mode])) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
110 if (getfp(fd, &fp)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
111 errno = EBADF;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
112 return -1;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
113 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
114 if ((*fp->f_ops->fo_select)(fp, mode_type[mode])) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
115 FD_SET(fd, result[mode]);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
116 num++;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
117 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
118 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
119 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
120 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
121 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
122 if (num) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
123 // Found something, update user's sets
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
124 if (in) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
125 memcpy(in, &in_res, sizeof(in_res));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
126 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
127 if (out) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
128 memcpy(out, &out_res, sizeof(out_res));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
129 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
130 if (ex) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
131 memcpy(ex, &ex_res, sizeof(ex_res));
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
132 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
133 return num;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
134 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
135 // Nothing found, see if we want to wait
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
136 if (tv) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
137 if (ticks == 0) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
138 // Special case of "poll"
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
139 return 0;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
140 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
141 flag = cyg_flag_timed_wait(&select_flag, wait_flag,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
142 CYG_FLAG_WAITMODE_OR|CYG_FLAG_WAITMODE_CLR,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
143 then);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
144 } else {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
145 // Wait forever (until something happens)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
146 flag = cyg_flag_wait(&select_flag, wait_flag,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
147 CYG_FLAG_WAITMODE_OR|CYG_FLAG_WAITMODE_CLR);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
148 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
149 if (flag & SELECT_ABORT) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
150 errno = EINTR;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
151 return -1;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
152 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
153 if (!flag) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
154 errno = ETIMEDOUT;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
155 return -1;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
156 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
157 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
158 errno = ENOSYS;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
159 return -1;
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
160 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
161
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
162 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
163 // This function is called by the lower layers to record the
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
164 // fact that a particular 'select' event is being requested.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
165 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
166 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
167 selrecord(void *selector, struct selinfo *info)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
168 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
169 // Unused by this implementation
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
170 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
171
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
172 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
173 // This function is called to indicate that a 'select' event
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
174 // may have occurred.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
175 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
176 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
177 selwakeup(struct selinfo *info)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
178 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
179 cyg_scheduler_lock(); // Need this test to be indivisible
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
180 if (cyg_flag_waiting(&select_flag)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
181 // Signal any threads doing a 'select()' that I/O may be possible
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
182 cyg_flag_setbits(&select_flag, SELECT_WAKE);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
183 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
184 cyg_scheduler_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
185 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
186
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
187 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
188 // The public function used by 'normal' programs. This interface does not allow
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
189 // the 'select()' to be externally interrupted.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
190 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
191 int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
192 select(int nfd, fd_set *in, fd_set *out, fd_set *ex,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
193 struct timeval *tv)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
194 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
195 return _cyg_select(nfd, in, out, ex, tv, false);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
196 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
197
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
198 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
199 // The public function used by programs which wish to allow interruption,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
200 // using the 'cyg_select_abort()' function below.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
201 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
202 int
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
203 cyg_select_with_abort(int nfd, fd_set *in, fd_set *out, fd_set *ex,
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
204 struct timeval *tv)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
205 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
206 return _cyg_select(nfd, in, out, ex, tv, true);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
207 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
208
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
209 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
210 // This function can be called by the user to forceably abort any
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
211 // current selects.
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
212 //
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
213 void
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
214 cyg_select_abort(void)
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
215 {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
216 cyg_scheduler_lock(); // Need this test to be indivisible
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
217 if (cyg_flag_waiting(&select_flag)) {
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
218 // Signal any threads doing a 'select()' that I/O may be possible
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
219 cyg_flag_setbits(&select_flag, SELECT_ABORT);
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
220 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
221 cyg_scheduler_unlock();
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
222 }
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
223
ced4577552cd Merge from eCos master repository on 2000-06-06-08:44:00-BST
jlarmour
parents:
diff changeset
224