Mercurial > cpython-lru_cache-weakref

annotate Modules/selectmodule.c @ 11518:cc412dfd79f7 legacy-trunk

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New examples by Tony Ingraldi, using dns-lookup in stead of the funny interslip module.
author Jack Jansen <jack.jansen@cwi.nl>
date Fri, 03 Dec 1999 15:15:28 +0000
parents 6aac31cd2102
children db756d31e727
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI or Corporation for National Research Initiatives or
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13 CNRI not be used in advertising or publicity pertaining to
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14 distribution of the software without specific, written prior
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15 permission.
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16
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17 While CWI is the initial source for this software, a modified version
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18 is made available by the Corporation for National Research Initiatives
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19 (CNRI) at the Internet address ftp://ftp.python.org.
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20
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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28 PERFORMANCE OF THIS SOFTWARE.
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29
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30 ******************************************************************/
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31
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32 /* select - Module containing unix select(2) call.
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33 Under Unix, the file descriptors are small integers.
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34 Under Win32, select only exists for sockets, and sockets may
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35 have any value except INVALID_SOCKET.
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36 Under BeOS, we suffer the same dichotomy as Win32; sockets can be anything
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37 >= 0.
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38 */
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39
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40 #include "Python.h"
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41
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42 #ifdef HAVE_UNISTD_H
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43 #include <unistd.h>
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44 #endif
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45
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46 #ifdef __sgi
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47 /* This is missing from unistd.h */
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48 extern void bzero();
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49 #endif
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50
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51 #ifndef DONT_HAVE_SYS_TYPES_H
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52 #include <sys/types.h>
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53 #endif
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54
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55 #if defined(PYOS_OS2)
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56 #include <sys/time.h>
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57 #include <utils.h>
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58 #endif
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59
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60 #ifdef MS_WINDOWS
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61 #include <winsock.h>
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62 #else
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63 #ifdef __BEOS__
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64 #include <net/socket.h>
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65 #define SOCKET int
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66 #else
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67 #include "myselect.h" /* Also includes mytime.h */
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68 #define SOCKET int
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69 #endif
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70 #endif
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71
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72 static PyObject *SelectError;
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73
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74 /* list of Python objects and their file descriptor */
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75 typedef struct {
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76 PyObject *obj; /* owned reference */
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77 SOCKET fd;
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78 int sentinel; /* -1 == sentinel */
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79 } pylist;
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80
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81 static void
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82 reap_obj(fd2obj)
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83 pylist fd2obj[FD_SETSIZE + 3];
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84 {
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85 int i;
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86 for (i = 0; i < FD_SETSIZE + 3 && fd2obj[i].sentinel >= 0; i++) {
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87 Py_XDECREF(fd2obj[i].obj);
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88 fd2obj[i].obj = NULL;
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89 }
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90 fd2obj[0].sentinel = -1;
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91 }
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92
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93
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94 /* returns -1 and sets the Python exception if an error occurred, otherwise
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95 returns a number >= 0
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96 */
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97 static int
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98 list2set(list, set, fd2obj)
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99 PyObject *list;
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100 fd_set *set;
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101 pylist fd2obj[FD_SETSIZE + 3];
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102 {
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103 int i;
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104 int max = -1;
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105 int index = 0;
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106 int len = PyList_Size(list);
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107 PyObject* o = NULL;
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108
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109 fd2obj[0].obj = (PyObject*)0; /* set list to zero size */
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110 FD_ZERO(set);
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111
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112 for (i = 0; i < len; i++) {
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113 PyObject *meth;
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114 SOCKET v;
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115
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116 /* any intervening fileno() calls could decr this refcnt */
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117 if (!(o = PyList_GetItem(list, i)))
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118 return -1;
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119
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120 Py_INCREF(o);
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121
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122 if (PyInt_Check(o)) {
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123 v = PyInt_AsLong(o);
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124 }
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125 else if ((meth = PyObject_GetAttrString(o, "fileno")) != NULL)
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126 {
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127 PyObject *fno = PyEval_CallObject(meth, NULL);
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128 Py_DECREF(meth);
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129 if (fno == NULL)
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130 goto finally;
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131
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132 if (!PyInt_Check(fno)) {
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133 PyErr_SetString(PyExc_TypeError,
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134 "fileno method returned a non-integer");
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135 Py_DECREF(fno);
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136 goto finally;
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137 }
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138 v = PyInt_AsLong(fno);
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diff changeset
139 Py_DECREF(fno);
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diff changeset
140 }
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
141 else {
cb405b9696d4 Several changes... Guido *please* take a look!
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parents: 4621
diff changeset
142 PyErr_SetString(PyExc_TypeError,
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
143 "argument must be an int, or have a fileno() method.");
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
144 goto finally;
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
145 }
8823
f2a4a2b60860 Changes for BeOS, QNX and long long, by Chris Herborth.
Guido van Rossum <guido@python.org>
parents: 8616
diff changeset
146 #if defined(_MSC_VER) || defined(__BEOS__)
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
147 max = 0; /* not used for Win32 */
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
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diff changeset
148 #else /* !_MSC_VER */
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
149 if (v < 0 || v >= FD_SETSIZE) {
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
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diff changeset
150 PyErr_SetString(PyExc_ValueError,
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
151 "filedescriptor out of range in select()");
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
152 goto finally;
4692
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Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
153 }
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
154 if (v > max)
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
155 max = v;
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
156 #endif /* _MSC_VER */
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
157 FD_SET(v, set);
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
158
4692
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diff changeset
159 /* add object and its file descriptor to the list */
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Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
160 if (index >= FD_SETSIZE) {
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
161 PyErr_SetString(PyExc_ValueError,
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
162 "too many file descriptors in select()");
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
163 goto finally;
4692
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Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
164 }
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
165 fd2obj[index].obj = o;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
166 fd2obj[index].fd = v;
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
167 fd2obj[index].sentinel = 0;
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
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diff changeset
168 fd2obj[++index].sentinel = -1;
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
169 }
4692
cb405b9696d4 Several changes... Guido *please* take a look!
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diff changeset
170 return max+1;
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
171
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
172 finally:
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
173 Py_XDECREF(o);
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
174 return -1;
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
175 }
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
176
4692
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diff changeset
177 /* returns NULL and sets the Python exception if an error occurred */
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
178 static PyObject *
3675
d617de15774b Yet another pass at fd2obj -- this time for Windows
Guido van Rossum <guido@python.org>
parents: 2611
diff changeset
179 set2list(set, fd2obj)
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
180 fd_set *set;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
181 pylist fd2obj[FD_SETSIZE + 3];
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
182 {
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
183 int i, j, count=0;
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
184 PyObject *list, *o;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
185 SOCKET fd;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
186
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
187 for (j = 0; fd2obj[j].sentinel >= 0; j++) {
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
188 if (FD_ISSET(fd2obj[j].fd, set))
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
189 count++;
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
190 }
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
191 list = PyList_New(count);
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
192 if (!list)
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
193 return NULL;
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
194
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
195 i = 0;
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
196 for (j = 0; fd2obj[j].sentinel >= 0; j++) {
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
197 fd = fd2obj[j].fd;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
198 if (FD_ISSET(fd, set)) {
3675
d617de15774b Yet another pass at fd2obj -- this time for Windows
Guido van Rossum <guido@python.org>
parents: 2611
diff changeset
199 #ifndef _MSC_VER
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
200 if (fd > FD_SETSIZE) {
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
201 PyErr_SetString(PyExc_SystemError,
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
202 "filedescriptor out of range returned in select()");
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
203 goto finally;
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
204 }
3675
d617de15774b Yet another pass at fd2obj -- this time for Windows
Guido van Rossum <guido@python.org>
parents: 2611
diff changeset
205 #endif
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
206 o = fd2obj[j].obj;
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
207 fd2obj[j].obj = NULL;
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
208 /* transfer ownership */
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
209 if (PyList_SetItem(list, i, o) < 0)
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
210 goto finally;
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
211
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
212 i++;
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
213 }
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
214 }
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
215 return list;
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
216 finally:
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
217 Py_DECREF(list);
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
218 return NULL;
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
219 }
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
220
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
221
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
222 static PyObject *
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
223 select_select(self, args)
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
224 PyObject *self;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
225 PyObject *args;
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
226 {
8616
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
227 #ifdef MS_WINDOWS
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
228 /* This would be an awful lot of stack space on Windows! */
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
229 pylist *rfd2obj, *wfd2obj, *efd2obj;
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
230 #else
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
231 pylist rfd2obj[FD_SETSIZE + 3];
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
232 pylist wfd2obj[FD_SETSIZE + 3];
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
233 pylist efd2obj[FD_SETSIZE + 3];
8616
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
234 #endif
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
235 PyObject *ifdlist, *ofdlist, *efdlist;
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
236 PyObject *ret = NULL;
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
237 PyObject *tout = Py_None;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
238 fd_set ifdset, ofdset, efdset;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
239 double timeout;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
240 struct timeval tv, *tvp;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
241 int seconds;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
242 int imax, omax, emax, max;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
243 int n;
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
244
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
245 /* convert arguments */
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
246 if (!PyArg_ParseTuple(args, "OOO|O",
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
247 &ifdlist, &ofdlist, &efdlist, &tout))
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
248 return NULL;
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
249
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
250 if (tout == Py_None)
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
251 tvp = (struct timeval *)0;
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
252 else if (!PyArg_Parse(tout, "d", &timeout)) {
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
253 PyErr_SetString(PyExc_TypeError,
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
254 "timeout must be a float or None");
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
255 return NULL;
4700
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
256 }
1390
cffe8d6b2f09 * selectmodule.c (select_select): timeout argument may be None with same
Guido van Rossum <guido@python.org>
parents: 1284
diff changeset
257 else {
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
258 seconds = (int)timeout;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
259 timeout = timeout - (double)seconds;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
260 tv.tv_sec = seconds;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
261 tv.tv_usec = (int)(timeout*1000000.0);
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
262 tvp = &tv;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
263 }
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
264
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
265 /* sanity check first three arguments */
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
266 if (!PyList_Check(ifdlist) ||
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
267 !PyList_Check(ofdlist) ||
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
268 !PyList_Check(efdlist))
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
269 {
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
270 PyErr_SetString(PyExc_TypeError,
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
271 "arguments 1-3 must be lists");
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
272 return NULL;
1390
cffe8d6b2f09 * selectmodule.c (select_select): timeout argument may be None with same
Guido van Rossum <guido@python.org>
parents: 1284
diff changeset
273 }
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
274
8616
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
275 #ifdef MS_WINDOWS
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
276 /* Allocate memory for the lists */
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
277 rfd2obj = PyMem_NEW(pylist, FD_SETSIZE + 3);
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
278 wfd2obj = PyMem_NEW(pylist, FD_SETSIZE + 3);
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
279 efd2obj = PyMem_NEW(pylist, FD_SETSIZE + 3);
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
280 if (rfd2obj == NULL || wfd2obj == NULL || efd2obj == NULL) {
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
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diff changeset
281 PyMem_XDEL(rfd2obj);
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
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diff changeset
282 PyMem_XDEL(wfd2obj);
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
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diff changeset
283 PyMem_XDEL(efd2obj);
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Guido van Rossum <guido@python.org>
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diff changeset
284 return NULL;
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
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diff changeset
285 }
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
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diff changeset
286 #endif
4692
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Barry Warsaw <barry@python.org>
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287 /* Convert lists to fd_sets, and get maximum fd number
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Barry Warsaw <barry@python.org>
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diff changeset
288 * propagates the Python exception set in list2set()
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
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diff changeset
289 */
4700
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diff changeset
290 rfd2obj[0].sentinel = -1;
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diff changeset
291 wfd2obj[0].sentinel = -1;
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diff changeset
292 efd2obj[0].sentinel = -1;
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
293 if ((imax=list2set(ifdlist, &ifdset, rfd2obj)) < 0)
4700
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Barry Warsaw <barry@python.org>
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diff changeset
294 goto finally;
4692
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Barry Warsaw <barry@python.org>
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295 if ((omax=list2set(ofdlist, &ofdset, wfd2obj)) < 0)
4700
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diff changeset
296 goto finally;
4692
cb405b9696d4 Several changes... Guido *please* take a look!
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diff changeset
297 if ((emax=list2set(efdlist, &efdset, efd2obj)) < 0)
4700
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diff changeset
298 goto finally;
4692
cb405b9696d4 Several changes... Guido *please* take a look!
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diff changeset
299 max = imax;
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diff changeset
300 if (omax > max) max = omax;
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
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diff changeset
301 if (emax > max) max = emax;
cb405b9696d4 Several changes... Guido *please* take a look!
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parents: 4621
diff changeset
302
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
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diff changeset
303 Py_BEGIN_ALLOW_THREADS
cb405b9696d4 Several changes... Guido *please* take a look!
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diff changeset
304 n = select(max, &ifdset, &ofdset, &efdset, tvp);
cb405b9696d4 Several changes... Guido *please* take a look!
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diff changeset
305 Py_END_ALLOW_THREADS
cb405b9696d4 Several changes... Guido *please* take a look!
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parents: 4621
diff changeset
306
cb405b9696d4 Several changes... Guido *please* take a look!
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parents: 4621
diff changeset
307 if (n < 0) {
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
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diff changeset
308 PyErr_SetFromErrno(SelectError);
cb405b9696d4 Several changes... Guido *please* take a look!
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parents: 4621
diff changeset
309 }
4700
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diff changeset
310 else if (n == 0) {
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diff changeset
311 /* optimization */
4692
cb405b9696d4 Several changes... Guido *please* take a look!
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diff changeset
312 ifdlist = PyList_New(0);
4700
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diff changeset
313 if (ifdlist) {
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diff changeset
314 ret = Py_BuildValue("OOO", ifdlist, ifdlist, ifdlist);
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diff changeset
315 Py_DECREF(ifdlist);
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diff changeset
316 }
4692
cb405b9696d4 Several changes... Guido *please* take a look!
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diff changeset
317 }
4700
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parents: 4692
diff changeset
318 else {
825038d98ab6 Reworked to eliminate all potential memory problems, including
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parents: 4692
diff changeset
319 /* any of these three calls can raise an exception. it's more
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
320 convenient to test for this after all three calls... but
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
321 is that acceptable?
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
322 */
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
323 ifdlist = set2list(&ifdset, rfd2obj);
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
324 ofdlist = set2list(&ofdset, wfd2obj);
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
325 efdlist = set2list(&efdset, efd2obj);
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
326 if (PyErr_Occurred())
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
327 ret = NULL;
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
328 else
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
329 ret = Py_BuildValue("OOO", ifdlist, ofdlist, efdlist);
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
330
4700
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Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
331 Py_DECREF(ifdlist);
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
332 Py_DECREF(ofdlist);
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
333 Py_DECREF(efdlist);
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
334 }
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
335
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
336 finally:
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
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diff changeset
337 reap_obj(rfd2obj);
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
338 reap_obj(wfd2obj);
825038d98ab6 Reworked to eliminate all potential memory problems, including
Barry Warsaw <barry@python.org>
parents: 4692
diff changeset
339 reap_obj(efd2obj);
8616
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
340 #ifdef MS_WINDOWS
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
341 PyMem_DEL(rfd2obj);
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
342 PyMem_DEL(wfd2obj);
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
343 PyMem_DEL(efd2obj);
2417f17fa3e5 On Windows, put the select file descriptor arrays on the heap.
Guido van Rossum <guido@python.org>
parents: 8570
diff changeset
344 #endif
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
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diff changeset
345 return ret;
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
346 }
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
347
8570
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
348 static char select_doc[] =
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
349 "select(rlist, wlist, xlist[, timeout]) -> (rlist, wlist, xlist)\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
350 \n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
351 Wait until one or more file descriptors are ready for some kind of I/O.\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
352 The first three arguments are lists of file descriptors to be waited for:\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
353 rlist -- wait until ready for reading\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
354 wlist -- wait until ready for writing\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
355 xlist -- wait for an ``exceptional condition''\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
356 If only one kind of condition is required, pass [] for the other lists.\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
357 A file descriptor is either a socket or file object, or a small integer\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
358 gotten from a fileno() method call on one of those.\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
359 \n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
360 The optional 4th argument specifies a timeout in seconds; it may be\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
361 a floating point number to specify fractions of seconds. If it is absent\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
362 or None, the call will never time out.\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
363 \n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
364 The return value is a tuple of three lists corresponding to the first three\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
365 arguments; each contains the subset of the corresponding file descriptors\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
366 that are ready.\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
367 \n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
368 *** IMPORTANT NOTICE ***\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
369 On Windows, only sockets are supported; on Unix, all file descriptors.";
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
370
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
371
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
372 static PyMethodDef select_methods[] = {
8570
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
373 {"select", select_select, 1, select_doc},
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
374 {0, 0}, /* sentinel */
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
375 };
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
376
8570
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
377 static char module_doc[] =
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
378 "This module supports asynchronous I/O on multiple file descriptors.\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
379 \n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
380 *** IMPORTANT NOTICE ***\n\
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
381 On Windows, only sockets are supported; on Unix, all file descriptors.";
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
382
9588
38023a425e48 Add DL_EXPORT() to all modules that could possibly be used
Guido van Rossum <guido@python.org>
parents: 8823
diff changeset
383 DL_EXPORT(void)
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
384 initselect()
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
385 {
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
386 PyObject *m, *d;
8570
bd695de18ecf Added doc strings.
Guido van Rossum <guido@python.org>
parents: 6626
diff changeset
387 m = Py_InitModule3("select", select_methods, module_doc);
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
388 d = PyModule_GetDict(m);
6367
2c29b8982643 Apply two changes, systematically:
Guido van Rossum <guido@python.org>
parents: 4734
diff changeset
389 SelectError = PyErr_NewException("select.error", NULL, NULL);
4692
cb405b9696d4 Several changes... Guido *please* take a look!
Barry Warsaw <barry@python.org>
parents: 4621
diff changeset
390 PyDict_SetItemString(d, "error", SelectError);
902
a4793ae26682 Changes for new UNIX-specific built-in module 'select' and new header for
Guido van Rossum <guido@python.org>
parents:
diff changeset
391 }