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annotate zmq.h @ 258:5296f3bcd160

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Implement DDS clients reconnect On network send() failures try to reconnect to the server before returning an error. This allows to restart the network servers controlling the DDSes wiothout having to restart the clients.
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Tue, 16 Jun 2015 14:31:35 +0200
parents 65ab87e5a8d6
children
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1 /*
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2 Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
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3
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4 This file is part of 0MQ.
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5
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6 0MQ is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU Lesser General Public License as published by
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8 the Free Software Foundation; either version 3 of the License, or
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9 (at your option) any later version.
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10
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11 0MQ is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU Lesser General Public License for more details.
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15
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16 You should have received a copy of the GNU Lesser General Public License
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17 along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 *************************************************************************
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20 NOTE to contributors. This file comprises the principal public contract
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21 for ZeroMQ API users (along with zmq_utils.h). Any change to this file
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22 supplied in a stable release SHOULD not break existing applications.
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23 In practice this means that the value of constants must not change, and
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24 that old values may not be reused for new constants.
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25 *************************************************************************
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26 */
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27
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28 #ifndef __ZMQ_H_INCLUDED__
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29 #define __ZMQ_H_INCLUDED__
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30
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31 /* Version macros for compile-time API version detection */
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32 #define ZMQ_VERSION_MAJOR 4
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33 #define ZMQ_VERSION_MINOR 0
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34 #define ZMQ_VERSION_PATCH 4
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35
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36 #define ZMQ_MAKE_VERSION(major, minor, patch) \
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37 ((major) * 10000 + (minor) * 100 + (patch))
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38 #define ZMQ_VERSION \
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39 ZMQ_MAKE_VERSION(ZMQ_VERSION_MAJOR, ZMQ_VERSION_MINOR, ZMQ_VERSION_PATCH)
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40
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41 #ifdef __cplusplus
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42 extern "C" {
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43 #endif
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44
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45 #if !defined _WIN32_WCE
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46 #include <errno.h>
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47 #endif
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48 #include <stddef.h>
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49 #include <stdio.h>
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50 #if defined _WIN32
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51 #include <winsock2.h>
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52 #endif
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53
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54 /* Handle DSO symbol visibility */
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55 #if defined _WIN32
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56 # if defined ZMQ_STATIC
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57 # define ZMQ_EXPORT
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58 # elif defined DLL_EXPORT
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59 # define ZMQ_EXPORT __declspec(dllexport)
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60 # else
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61 # define ZMQ_EXPORT __declspec(dllimport)
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62 # endif
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63 #else
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64 # if defined __SUNPRO_C || defined __SUNPRO_CC
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65 # define ZMQ_EXPORT __global
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66 # elif (defined __GNUC__ && __GNUC__ >= 4) || defined __INTEL_COMPILER
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67 # define ZMQ_EXPORT __attribute__ ((visibility("default")))
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68 # else
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69 # define ZMQ_EXPORT
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70 # endif
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71 #endif
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72
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73 /* Define integer types needed for event interface */
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74 #if defined ZMQ_HAVE_SOLARIS || defined ZMQ_HAVE_OPENVMS
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75 # include <inttypes.h>
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76 #elif defined _MSC_VER && _MSC_VER < 1600
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77 # ifndef int32_t
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78 typedef __int32 int32_t;
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79 # endif
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80 # ifndef uint16_t
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81 typedef unsigned __int16 uint16_t;
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82 # endif
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83 # ifndef uint8_t
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84 typedef unsigned __int8 uint8_t;
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85 # endif
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86 #else
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87 # include <stdint.h>
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88 #endif
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89
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90
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91 /******************************************************************************/
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92 /* 0MQ errors. */
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93 /******************************************************************************/
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94
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95 /* A number random enough not to collide with different errno ranges on */
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96 /* different OSes. The assumption is that error_t is at least 32-bit type. */
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97 #define ZMQ_HAUSNUMERO 156384712
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98
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99 /* On Windows platform some of the standard POSIX errnos are not defined. */
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100 #ifndef ENOTSUP
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101 #define ENOTSUP (ZMQ_HAUSNUMERO + 1)
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102 #endif
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103 #ifndef EPROTONOSUPPORT
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104 #define EPROTONOSUPPORT (ZMQ_HAUSNUMERO + 2)
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105 #endif
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106 #ifndef ENOBUFS
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107 #define ENOBUFS (ZMQ_HAUSNUMERO + 3)
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108 #endif
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109 #ifndef ENETDOWN
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110 #define ENETDOWN (ZMQ_HAUSNUMERO + 4)
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111 #endif
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112 #ifndef EADDRINUSE
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113 #define EADDRINUSE (ZMQ_HAUSNUMERO + 5)
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114 #endif
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115 #ifndef EADDRNOTAVAIL
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116 #define EADDRNOTAVAIL (ZMQ_HAUSNUMERO + 6)
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117 #endif
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118 #ifndef ECONNREFUSED
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119 #define ECONNREFUSED (ZMQ_HAUSNUMERO + 7)
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120 #endif
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121 #ifndef EINPROGRESS
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122 #define EINPROGRESS (ZMQ_HAUSNUMERO + 8)
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123 #endif
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124 #ifndef ENOTSOCK
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125 #define ENOTSOCK (ZMQ_HAUSNUMERO + 9)
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126 #endif
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127 #ifndef EMSGSIZE
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128 #define EMSGSIZE (ZMQ_HAUSNUMERO + 10)
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129 #endif
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130 #ifndef EAFNOSUPPORT
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131 #define EAFNOSUPPORT (ZMQ_HAUSNUMERO + 11)
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132 #endif
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133 #ifndef ENETUNREACH
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134 #define ENETUNREACH (ZMQ_HAUSNUMERO + 12)
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135 #endif
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136 #ifndef ECONNABORTED
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137 #define ECONNABORTED (ZMQ_HAUSNUMERO + 13)
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138 #endif
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139 #ifndef ECONNRESET
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140 #define ECONNRESET (ZMQ_HAUSNUMERO + 14)
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141 #endif
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142 #ifndef ENOTCONN
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143 #define ENOTCONN (ZMQ_HAUSNUMERO + 15)
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144 #endif
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145 #ifndef ETIMEDOUT
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146 #define ETIMEDOUT (ZMQ_HAUSNUMERO + 16)
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147 #endif
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148 #ifndef EHOSTUNREACH
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149 #define EHOSTUNREACH (ZMQ_HAUSNUMERO + 17)
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150 #endif
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151 #ifndef ENETRESET
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152 #define ENETRESET (ZMQ_HAUSNUMERO + 18)
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153 #endif
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154
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155 /* Native 0MQ error codes. */
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156 #define EFSM (ZMQ_HAUSNUMERO + 51)
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157 #define ENOCOMPATPROTO (ZMQ_HAUSNUMERO + 52)
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158 #define ETERM (ZMQ_HAUSNUMERO + 53)
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159 #define EMTHREAD (ZMQ_HAUSNUMERO + 54)
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160
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161 /* Run-time API version detection */
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162 ZMQ_EXPORT void zmq_version (int *major, int *minor, int *patch);
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163
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164 /* This function retrieves the errno as it is known to 0MQ library. The goal */
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165 /* of this function is to make the code 100% portable, including where 0MQ */
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166 /* compiled with certain CRT library (on Windows) is linked to an */
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167 /* application that uses different CRT library. */
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168 ZMQ_EXPORT int zmq_errno (void);
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169
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170 /* Resolves system errors and 0MQ errors to human-readable string. */
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171 ZMQ_EXPORT const char *zmq_strerror (int errnum);
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172
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173 /******************************************************************************/
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174 /* 0MQ infrastructure (a.k.a. context) initialisation & termination. */
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175 /******************************************************************************/
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176
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177 /* New API */
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178 /* Context options */
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179 #define ZMQ_IO_THREADS 1
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180 #define ZMQ_MAX_SOCKETS 2
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181
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182 /* Default for new contexts */
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183 #define ZMQ_IO_THREADS_DFLT 1
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184 #define ZMQ_MAX_SOCKETS_DFLT 1023
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185
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186 ZMQ_EXPORT void *zmq_ctx_new (void);
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187 ZMQ_EXPORT int zmq_ctx_term (void *context);
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188 ZMQ_EXPORT int zmq_ctx_shutdown (void *ctx_);
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189 ZMQ_EXPORT int zmq_ctx_set (void *context, int option, int optval);
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190 ZMQ_EXPORT int zmq_ctx_get (void *context, int option);
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191
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192 /* Old (legacy) API */
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193 ZMQ_EXPORT void *zmq_init (int io_threads);
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194 ZMQ_EXPORT int zmq_term (void *context);
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195 ZMQ_EXPORT int zmq_ctx_destroy (void *context);
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196
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197
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198 /******************************************************************************/
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199 /* 0MQ message definition. */
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200 /******************************************************************************/
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201
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202 typedef struct zmq_msg_t {unsigned char _ [32];} zmq_msg_t;
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203
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204 typedef void (zmq_free_fn) (void *data, void *hint);
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205
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206 ZMQ_EXPORT int zmq_msg_init (zmq_msg_t *msg);
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207 ZMQ_EXPORT int zmq_msg_init_size (zmq_msg_t *msg, size_t size);
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208 ZMQ_EXPORT int zmq_msg_init_data (zmq_msg_t *msg, void *data,
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209 size_t size, zmq_free_fn *ffn, void *hint);
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210 ZMQ_EXPORT int zmq_msg_send (zmq_msg_t *msg, void *s, int flags);
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211 ZMQ_EXPORT int zmq_msg_recv (zmq_msg_t *msg, void *s, int flags);
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212 ZMQ_EXPORT int zmq_msg_close (zmq_msg_t *msg);
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213 ZMQ_EXPORT int zmq_msg_move (zmq_msg_t *dest, zmq_msg_t *src);
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214 ZMQ_EXPORT int zmq_msg_copy (zmq_msg_t *dest, zmq_msg_t *src);
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215 ZMQ_EXPORT void *zmq_msg_data (zmq_msg_t *msg);
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216 ZMQ_EXPORT size_t zmq_msg_size (zmq_msg_t *msg);
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217 ZMQ_EXPORT int zmq_msg_more (zmq_msg_t *msg);
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218 ZMQ_EXPORT int zmq_msg_get (zmq_msg_t *msg, int option);
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219 ZMQ_EXPORT int zmq_msg_set (zmq_msg_t *msg, int option, int optval);
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220
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221
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222 /******************************************************************************/
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223 /* 0MQ socket definition. */
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224 /******************************************************************************/
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225
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226 /* Socket types. */
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227 #define ZMQ_PAIR 0
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228 #define ZMQ_PUB 1
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229 #define ZMQ_SUB 2
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230 #define ZMQ_REQ 3
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231 #define ZMQ_REP 4
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232 #define ZMQ_DEALER 5
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233 #define ZMQ_ROUTER 6
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234 #define ZMQ_PULL 7
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235 #define ZMQ_PUSH 8
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236 #define ZMQ_XPUB 9
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237 #define ZMQ_XSUB 10
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238 #define ZMQ_STREAM 11
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239
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240 /* Deprecated aliases */
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241 #define ZMQ_XREQ ZMQ_DEALER
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242 #define ZMQ_XREP ZMQ_ROUTER
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243
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244 /* Socket options. */
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245 #define ZMQ_AFFINITY 4
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246 #define ZMQ_IDENTITY 5
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247 #define ZMQ_SUBSCRIBE 6
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248 #define ZMQ_UNSUBSCRIBE 7
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249 #define ZMQ_RATE 8
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250 #define ZMQ_RECOVERY_IVL 9
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251 #define ZMQ_SNDBUF 11
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252 #define ZMQ_RCVBUF 12
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253 #define ZMQ_RCVMORE 13
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254 #define ZMQ_FD 14
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255 #define ZMQ_EVENTS 15
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256 #define ZMQ_TYPE 16
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257 #define ZMQ_LINGER 17
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258 #define ZMQ_RECONNECT_IVL 18
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259 #define ZMQ_BACKLOG 19
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260 #define ZMQ_RECONNECT_IVL_MAX 21
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261 #define ZMQ_MAXMSGSIZE 22
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262 #define ZMQ_SNDHWM 23
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263 #define ZMQ_RCVHWM 24
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264 #define ZMQ_MULTICAST_HOPS 25
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265 #define ZMQ_RCVTIMEO 27
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266 #define ZMQ_SNDTIMEO 28
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267 #define ZMQ_LAST_ENDPOINT 32
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268 #define ZMQ_ROUTER_MANDATORY 33
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269 #define ZMQ_TCP_KEEPALIVE 34
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270 #define ZMQ_TCP_KEEPALIVE_CNT 35
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271 #define ZMQ_TCP_KEEPALIVE_IDLE 36
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272 #define ZMQ_TCP_KEEPALIVE_INTVL 37
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273 #define ZMQ_TCP_ACCEPT_FILTER 38
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274 #define ZMQ_IMMEDIATE 39
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275 #define ZMQ_XPUB_VERBOSE 40
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276 #define ZMQ_ROUTER_RAW 41
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277 #define ZMQ_IPV6 42
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278 #define ZMQ_MECHANISM 43
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279 #define ZMQ_PLAIN_SERVER 44
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280 #define ZMQ_PLAIN_USERNAME 45
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281 #define ZMQ_PLAIN_PASSWORD 46
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282 #define ZMQ_CURVE_SERVER 47
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283 #define ZMQ_CURVE_PUBLICKEY 48
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284 #define ZMQ_CURVE_SECRETKEY 49
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285 #define ZMQ_CURVE_SERVERKEY 50
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286 #define ZMQ_PROBE_ROUTER 51
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287 #define ZMQ_REQ_CORRELATE 52
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288 #define ZMQ_REQ_RELAXED 53
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289 #define ZMQ_CONFLATE 54
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290 #define ZMQ_ZAP_DOMAIN 55
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291
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292 /* Message options */
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293 #define ZMQ_MORE 1
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294
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295 /* Send/recv options. */
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296 #define ZMQ_DONTWAIT 1
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297 #define ZMQ_SNDMORE 2
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298
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299 /* Security mechanisms */
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300 #define ZMQ_NULL 0
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301 #define ZMQ_PLAIN 1
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302 #define ZMQ_CURVE 2
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303
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304 /* Deprecated options and aliases */
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305 #define ZMQ_IPV4ONLY 31
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306 #define ZMQ_DELAY_ATTACH_ON_CONNECT ZMQ_IMMEDIATE
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307 #define ZMQ_NOBLOCK ZMQ_DONTWAIT
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308 #define ZMQ_FAIL_UNROUTABLE ZMQ_ROUTER_MANDATORY
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309 #define ZMQ_ROUTER_BEHAVIOR ZMQ_ROUTER_MANDATORY
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310
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311 /******************************************************************************/
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312 /* 0MQ socket events and monitoring */
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313 /******************************************************************************/
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314
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315 /* Socket transport events (tcp and ipc only) */
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316 #define ZMQ_EVENT_CONNECTED 1
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317 #define ZMQ_EVENT_CONNECT_DELAYED 2
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318 #define ZMQ_EVENT_CONNECT_RETRIED 4
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319
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320 #define ZMQ_EVENT_LISTENING 8
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321 #define ZMQ_EVENT_BIND_FAILED 16
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322
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323 #define ZMQ_EVENT_ACCEPTED 32
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324 #define ZMQ_EVENT_ACCEPT_FAILED 64
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325
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326 #define ZMQ_EVENT_CLOSED 128
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327 #define ZMQ_EVENT_CLOSE_FAILED 256
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328 #define ZMQ_EVENT_DISCONNECTED 512
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329 #define ZMQ_EVENT_MONITOR_STOPPED 1024
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330
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331 #define ZMQ_EVENT_ALL ( ZMQ_EVENT_CONNECTED | ZMQ_EVENT_CONNECT_DELAYED | \
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332 ZMQ_EVENT_CONNECT_RETRIED | ZMQ_EVENT_LISTENING | \
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333 ZMQ_EVENT_BIND_FAILED | ZMQ_EVENT_ACCEPTED | \
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334 ZMQ_EVENT_ACCEPT_FAILED | ZMQ_EVENT_CLOSED | \
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335 ZMQ_EVENT_CLOSE_FAILED | ZMQ_EVENT_DISCONNECTED | \
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336 ZMQ_EVENT_MONITOR_STOPPED)
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337
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338 /* Socket event data */
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339 typedef struct {
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340 uint16_t event; // id of the event as bitfield
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341 int32_t value ; // value is either error code, fd or reconnect interval
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342 } zmq_event_t;
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343
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344 ZMQ_EXPORT void *zmq_socket (void *, int type);
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345 ZMQ_EXPORT int zmq_close (void *s);
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346 ZMQ_EXPORT int zmq_setsockopt (void *s, int option, const void *optval,
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347 size_t optvallen);
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348 ZMQ_EXPORT int zmq_getsockopt (void *s, int option, void *optval,
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349 size_t *optvallen);
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350 ZMQ_EXPORT int zmq_bind (void *s, const char *addr);
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351 ZMQ_EXPORT int zmq_connect (void *s, const char *addr);
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352 ZMQ_EXPORT int zmq_unbind (void *s, const char *addr);
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353 ZMQ_EXPORT int zmq_disconnect (void *s, const char *addr);
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354 ZMQ_EXPORT int zmq_send (void *s, const void *buf, size_t len, int flags);
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355 ZMQ_EXPORT int zmq_send_const (void *s, const void *buf, size_t len, int flags);
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356 ZMQ_EXPORT int zmq_recv (void *s, void *buf, size_t len, int flags);
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357 ZMQ_EXPORT int zmq_socket_monitor (void *s, const char *addr, int events);
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358
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359 ZMQ_EXPORT int zmq_sendmsg (void *s, zmq_msg_t *msg, int flags);
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360 ZMQ_EXPORT int zmq_recvmsg (void *s, zmq_msg_t *msg, int flags);
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361
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362 /* Experimental */
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363 struct iovec;
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364
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365 ZMQ_EXPORT int zmq_sendiov (void *s, struct iovec *iov, size_t count, int flags);
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366 ZMQ_EXPORT int zmq_recviov (void *s, struct iovec *iov, size_t *count, int flags);
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367
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368 /******************************************************************************/
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369 /* I/O multiplexing. */
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370 /******************************************************************************/
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371
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372 #define ZMQ_POLLIN 1
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373 #define ZMQ_POLLOUT 2
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374 #define ZMQ_POLLERR 4
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375
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376 typedef struct
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377 {
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378 void *socket;
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379 #if defined _WIN32
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380 SOCKET fd;
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381 #else
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382 int fd;
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383 #endif
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384 short events;
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385 short revents;
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386 } zmq_pollitem_t;
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387
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388 #define ZMQ_POLLITEMS_DFLT 16
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389
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390 ZMQ_EXPORT int zmq_poll (zmq_pollitem_t *items, int nitems, long timeout);
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391
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392 /* Built-in message proxy (3-way) */
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393
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394 ZMQ_EXPORT int zmq_proxy (void *frontend, void *backend, void *capture);
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395
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396 /* Encode a binary key as printable text using ZMQ RFC 32 */
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397 ZMQ_EXPORT char *zmq_z85_encode (char *dest, uint8_t *data, size_t size);
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398
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399 /* Encode a binary key from printable text per ZMQ RFC 32 */
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400 ZMQ_EXPORT uint8_t *zmq_z85_decode (uint8_t *dest, char *string);
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401
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402 /* Deprecated aliases */
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403 #define ZMQ_STREAMER 1
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404 #define ZMQ_FORWARDER 2
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405 #define ZMQ_QUEUE 3
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406 /* Deprecated method */
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407 ZMQ_EXPORT int zmq_device (int type, void *frontend, void *backend);
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408
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409 #undef ZMQ_EXPORT
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410
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411 #ifdef __cplusplus
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412 }
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413 #endif
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414
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415 #endif
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416