Mercurial > cpython-lru_cache-weakref

annotate Modules/socketmodule.h @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents f714af60508d
children
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1 /* Socket module header file */
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2
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3 /* Includes needed for the sockaddr_* symbols below */
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4 #ifndef MS_WINDOWS
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5 #ifdef __VMS
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6 # include <socket.h>
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7 # else
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8 # include <sys/socket.h>
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9 # endif
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10 # include <netinet/in.h>
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11 # if !defined(__CYGWIN__)
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12 # include <netinet/tcp.h>
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13 # endif
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14
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15 #else /* MS_WINDOWS */
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16 # include <winsock2.h>
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17 # include <ws2tcpip.h>
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18 /* VC6 is shipped with old platform headers, and does not have MSTcpIP.h
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19 * Separate SDKs have all the functions we want, but older ones don't have
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20 * any version information.
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21 * I use SIO_GET_MULTICAST_FILTER to detect a decent SDK.
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22 */
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23 # ifdef SIO_GET_MULTICAST_FILTER
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24 # include <MSTcpIP.h> /* for SIO_RCVALL */
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25 # define HAVE_ADDRINFO
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26 # define HAVE_SOCKADDR_STORAGE
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27 # define HAVE_GETADDRINFO
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28 # define HAVE_GETNAMEINFO
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29 # define ENABLE_IPV6
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30 # else
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31 typedef int socklen_t;
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32 # endif /* IPPROTO_IPV6 */
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33 #endif /* MS_WINDOWS */
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34
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35 #ifdef HAVE_SYS_UN_H
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36 # include <sys/un.h>
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37 #else
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38 # undef AF_UNIX
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39 #endif
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40
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41 #ifdef HAVE_LINUX_NETLINK_H
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42 # ifdef HAVE_ASM_TYPES_H
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43 # include <asm/types.h>
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44 # endif
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45 # include <linux/netlink.h>
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46 #else
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47 # undef AF_NETLINK
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48 #endif
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50 #ifdef HAVE_BLUETOOTH_BLUETOOTH_H
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51 #include <bluetooth/bluetooth.h>
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52 #include <bluetooth/rfcomm.h>
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53 #include <bluetooth/l2cap.h>
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54 #include <bluetooth/sco.h>
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55 #include <bluetooth/hci.h>
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56 #endif
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57
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58 #ifdef HAVE_BLUETOOTH_H
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59 #include <bluetooth.h>
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60 #endif
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62 #ifdef HAVE_NET_IF_H
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63 # include <net/if.h>
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64 #endif
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66 #ifdef HAVE_NETPACKET_PACKET_H
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67 # include <sys/ioctl.h>
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68 # include <netpacket/packet.h>
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69 #endif
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71 #ifdef HAVE_LINUX_TIPC_H
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72 # include <linux/tipc.h>
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73 #endif
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75 #ifdef HAVE_LINUX_CAN_H
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76 #include <linux/can.h>
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77 #endif
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78
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79 #ifdef HAVE_LINUX_CAN_RAW_H
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80 #include <linux/can/raw.h>
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81 #endif
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83 #ifdef HAVE_LINUX_CAN_BCM_H
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84 #include <linux/can/bcm.h>
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85 #endif
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86
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87 #ifdef HAVE_SYS_SYS_DOMAIN_H
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88 #include <sys/sys_domain.h>
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89 #endif
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90 #ifdef HAVE_SYS_KERN_CONTROL_H
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91 #include <sys/kern_control.h>
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92 #endif
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93
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94 #ifndef Py__SOCKET_H
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95 #define Py__SOCKET_H
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96 #ifdef __cplusplus
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97 extern "C" {
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98 #endif
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99
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100 /* Python module and C API name */
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101 #define PySocket_MODULE_NAME "_socket"
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102 #define PySocket_CAPI_NAME "CAPI"
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103 #define PySocket_CAPSULE_NAME PySocket_MODULE_NAME "." PySocket_CAPI_NAME
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104
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105 /* Abstract the socket file descriptor type */
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106 #ifdef MS_WINDOWS
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107 typedef SOCKET SOCKET_T;
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108 # ifdef MS_WIN64
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109 # define SIZEOF_SOCKET_T 8
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110 # else
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111 # define SIZEOF_SOCKET_T 4
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112 # endif
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113 #else
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114 typedef int SOCKET_T;
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115 # define SIZEOF_SOCKET_T SIZEOF_INT
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116 #endif
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117
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118 #if SIZEOF_SOCKET_T <= SIZEOF_LONG
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119 #define PyLong_FromSocket_t(fd) PyLong_FromLong((SOCKET_T)(fd))
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120 #define PyLong_AsSocket_t(fd) (SOCKET_T)PyLong_AsLong(fd)
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121 #else
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122 #define PyLong_FromSocket_t(fd) PyLong_FromLongLong((SOCKET_T)(fd))
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123 #define PyLong_AsSocket_t(fd) (SOCKET_T)PyLong_AsLongLong(fd)
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124 #endif
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125
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126 /* Socket address */
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127 typedef union sock_addr {
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128 struct sockaddr_in in;
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129 struct sockaddr sa;
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130 #ifdef AF_UNIX
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131 struct sockaddr_un un;
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132 #endif
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133 #ifdef AF_NETLINK
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134 struct sockaddr_nl nl;
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135 #endif
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136 #ifdef ENABLE_IPV6
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137 struct sockaddr_in6 in6;
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138 struct sockaddr_storage storage;
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139 #endif
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140 #ifdef HAVE_BLUETOOTH_BLUETOOTH_H
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141 struct sockaddr_l2 bt_l2;
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142 struct sockaddr_rc bt_rc;
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143 struct sockaddr_sco bt_sco;
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144 struct sockaddr_hci bt_hci;
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145 #endif
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146 #ifdef HAVE_NETPACKET_PACKET_H
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147 struct sockaddr_ll ll;
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148 #endif
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149 #ifdef HAVE_LINUX_CAN_H
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150 struct sockaddr_can can;
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151 #endif
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152 #ifdef HAVE_SYS_KERN_CONTROL_H
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153 struct sockaddr_ctl ctl;
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154 #endif
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155 } sock_addr_t;
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156
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157 /* The object holding a socket. It holds some extra information,
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158 like the address family, which is used to decode socket address
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159 arguments properly. */
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160
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161 typedef struct {
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162 PyObject_HEAD
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163 SOCKET_T sock_fd; /* Socket file descriptor */
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164 int sock_family; /* Address family, e.g., AF_INET */
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165 int sock_type; /* Socket type, e.g., SOCK_STREAM */
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166 int sock_proto; /* Protocol type, usually 0 */
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167 PyObject *(*errorhandler)(void); /* Error handler; checks
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168 errno, returns NULL and
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169 sets a Python exception */
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170 double sock_timeout; /* Operation timeout in seconds;
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171 0.0 means non-blocking */
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172 } PySocketSockObject;
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173
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174 /* --- C API ----------------------------------------------------*/
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175
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176 /* Short explanation of what this C API export mechanism does
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177 and how it works:
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178
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179 The _ssl module needs access to the type object defined in
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180 the _socket module. Since cross-DLL linking introduces a lot of
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181 problems on many platforms, the "trick" is to wrap the
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182 C API of a module in a struct which then gets exported to
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183 other modules via a PyCapsule.
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184
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185 The code in socketmodule.c defines this struct (which currently
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186 only contains the type object reference, but could very
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187 well also include other C APIs needed by other modules)
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188 and exports it as PyCapsule via the module dictionary
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189 under the name "CAPI".
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190
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191 Other modules can now include the socketmodule.h file
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192 which defines the needed C APIs to import and set up
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193 a static copy of this struct in the importing module.
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194
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195 After initialization, the importing module can then
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196 access the C APIs from the _socket module by simply
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197 referring to the static struct, e.g.
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198
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199 Load _socket module and its C API; this sets up the global
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200 PySocketModule:
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201
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202 if (PySocketModule_ImportModuleAndAPI())
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203 return;
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204
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205
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206 Now use the C API as if it were defined in the using
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207 module:
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208
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209 if (!PyArg_ParseTuple(args, "O!|zz:ssl",
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210
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211 PySocketModule.Sock_Type,
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212
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213 (PyObject*)&Sock,
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214 &key_file, &cert_file))
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215 return NULL;
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216
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217 Support could easily be extended to export more C APIs/symbols
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218 this way. Currently, only the type object is exported,
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219 other candidates would be socket constructors and socket
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220 access functions.
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221
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222 */
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223
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224 /* C API for usage by other Python modules */
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225 typedef struct {
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226 PyTypeObject *Sock_Type;
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227 PyObject *error;
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228 PyObject *timeout_error;
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229 } PySocketModule_APIObject;
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230
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231 #define PySocketModule_ImportModuleAndAPI() PyCapsule_Import(PySocket_CAPSULE_NAME, 1)
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232
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233 #ifdef __cplusplus
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234 }
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235 #endif
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236 #endif /* !Py__SOCKET_H */