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1 | /* |
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2 | * libev simple C++ wrapper classes |
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3 | * |
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4 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without modifica- |
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8 | * tion, are permitted provided that the following conditions are met: |
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9 | * |
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10 | * 1. Redistributions of source code must retain the above copyright notice, |
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11 | * this list of conditions and the following disclaimer. |
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12 | * |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | * |
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28 | * Alternatively, the contents of this file may be used under the terms of |
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29 | * the GNU General Public License ("GPL") version 2 or any later version, |
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30 | * in which case the provisions of the GPL are applicable instead of |
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31 | * the above. If you wish to allow the use of your version of this file |
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32 | * only under the terms of the GPL and not to allow others to use your |
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33 | * version of this file under the BSD license, indicate your decision |
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34 | * by deleting the provisions above and replace them with the notice |
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35 | * and other provisions required by the GPL. If you do not delete the |
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36 | * provisions above, a recipient may use your version of this file under |
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37 | * either the BSD or the GPL. |
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38 | */ |
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39 | |
1 | #ifndef EVPP_H__ |
40 | #ifndef EVPP_H__ |
2 | #define EVPP_H__ |
41 | #define EVPP_H__ |
3 | |
42 | |
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43 | #ifdef EV_H |
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44 | # include EV_H |
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45 | #else |
4 | #include "ev.h" |
46 | # include "ev.h" |
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47 | #endif |
5 | |
48 | |
6 | namespace ev { |
49 | namespace ev { |
7 | |
50 | |
8 | template<class watcher> |
51 | typedef ev_tstamp tstamp; |
9 | class callback |
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10 | { |
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11 | struct object { }; |
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12 | |
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13 | void *obj; |
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14 | void (object::*meth)(watcher &, int); |
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15 | |
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16 | /* a proxy is a kind of recipe on how to call a specific class method */ |
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17 | struct proxy_base { |
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18 | virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int) const = 0; |
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19 | }; |
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20 | template<class O1, class O2> |
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21 | struct proxy : proxy_base { |
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22 | virtual void call (void *obj, void (object::*meth)(watcher &, int), watcher &w, int e) const |
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23 | { |
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24 | ((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<void (O2::*)(watcher &, int)>(meth))) |
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25 | (w, e); |
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26 | } |
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27 | }; |
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28 | |
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29 | proxy_base *prxy; |
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30 | |
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31 | public: |
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32 | template<class O1, class O2> |
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33 | explicit callback (O1 *object, void (O2::*method)(watcher &, int)) |
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34 | { |
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35 | static proxy<O1,O2> p; |
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36 | obj = reinterpret_cast<void *>(object); |
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37 | meth = reinterpret_cast<void (object::*)(watcher &, int)>(method); |
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38 | prxy = &p; |
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39 | } |
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40 | |
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41 | void call (watcher *w, int e) const |
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42 | { |
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43 | return prxy->call (obj, meth, *w, e); |
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44 | } |
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45 | }; |
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46 | |
52 | |
47 | enum { |
53 | enum { |
48 | UNDEF = EV_UNDEF, |
54 | UNDEF = EV_UNDEF, |
49 | NONE = EV_NONE, |
55 | NONE = EV_NONE, |
50 | READ = EV_READ, |
56 | READ = EV_READ, |
51 | WRITE = EV_WRITE, |
57 | WRITE = EV_WRITE, |
52 | TIMEOUT = EV_TIMEOUT, |
58 | TIMEOUT = EV_TIMEOUT, |
53 | PERIODIC = EV_PERIODIC, |
59 | PERIODIC = EV_PERIODIC, |
54 | SIGNAL = EV_SIGNAL, |
60 | SIGNAL = EV_SIGNAL, |
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61 | CHILD = EV_CHILD, |
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62 | STAT = EV_STAT, |
55 | IDLE = EV_IDLE, |
63 | IDLE = EV_IDLE, |
56 | CHECK = EV_CHECK, |
64 | CHECK = EV_CHECK, |
57 | PREPARE = EV_PREPARE, |
65 | PREPARE = EV_PREPARE, |
58 | CHILD = EV_CHILD, |
66 | FORK = EV_FORK, |
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67 | EMBED = EV_EMBED, |
59 | ERROR = EV_ERROR, |
68 | ERROR = EV_ERROR, |
60 | }; |
69 | }; |
61 | |
70 | |
62 | typedef ev_tstamp tstamp; |
71 | enum |
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72 | { |
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73 | AUTO = EVFLAG_AUTO, |
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74 | NOENV = EVFLAG_NOENV, |
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75 | FORKCHECK = EVFLAG_FORKCHECK, |
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76 | SELECT = EVBACKEND_SELECT, |
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77 | POLL = EVBACKEND_POLL, |
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78 | EPOLL = EVBACKEND_EPOLL, |
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79 | KQUEUE = EVBACKEND_KQUEUE, |
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80 | DEVPOLL = EVBACKEND_DEVPOLL, |
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81 | PORT = EVBACKEND_PORT |
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82 | }; |
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83 | |
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84 | enum |
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85 | { |
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86 | NONBLOCK = EVLOOP_NONBLOCK, |
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87 | ONESHOT = EVLOOP_ONESHOT |
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88 | }; |
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89 | |
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90 | enum how_t |
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91 | { |
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92 | ONE = EVUNLOOP_ONE, |
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93 | ALL = EVUNLOOP_ALL |
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94 | }; |
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95 | |
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96 | template<class ev_watcher, class watcher> |
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97 | struct base : ev_watcher |
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98 | { |
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99 | #if EV_MULTIPLICITY |
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100 | EV_P; |
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101 | |
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102 | void set (EV_P) |
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103 | { |
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104 | this->EV_A = EV_A; |
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105 | } |
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106 | #endif |
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107 | |
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108 | base () |
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109 | { |
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110 | ev_init (this, 0); |
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111 | } |
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112 | |
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113 | void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) |
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114 | { |
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115 | this->data = data; |
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116 | ev_set_cb (static_cast<ev_watcher *>(this), cb); |
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117 | } |
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118 | |
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119 | // method callback |
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120 | template<class K, void (K::*method)(watcher &w, int)> |
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121 | void set (K *object) |
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122 | { |
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123 | set_ (object, method_thunk<K, method>); |
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124 | } |
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125 | |
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126 | template<class K, void (K::*method)(watcher &w, int)> |
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127 | static void method_thunk (EV_P_ ev_watcher *w, int revents) |
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128 | { |
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129 | K *obj = static_cast<K *>(w->data); |
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130 | (obj->*method) (*static_cast<watcher *>(w), revents); |
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131 | } |
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132 | |
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133 | // const method callback |
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134 | template<class K, void (K::*method)(watcher &w, int) const> |
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135 | void set (const K *object) |
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136 | { |
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137 | set_ (object, const_method_thunk<K, method>); |
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138 | } |
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139 | |
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140 | template<class K, void (K::*method)(watcher &w, int) const> |
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141 | static void const_method_thunk (EV_P_ ev_watcher *w, int revents) |
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142 | { |
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143 | K *obj = static_cast<K *>(w->data); |
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144 | (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents); |
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145 | } |
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146 | |
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147 | // function callback |
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148 | template<void (*function)(watcher &w, int)> |
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149 | void set (void *data = 0) |
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150 | { |
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151 | set_ (data, function_thunk<function>); |
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152 | } |
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153 | |
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154 | template<void (*function)(watcher &w, int)> |
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155 | static void function_thunk (EV_P_ ev_watcher *w, int revents) |
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156 | { |
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157 | function (*static_cast<watcher *>(w), revents); |
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158 | } |
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159 | |
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160 | // simple callback |
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161 | template<class K, void (K::*method)()> |
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162 | void set (K *object) |
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163 | { |
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164 | set_ (object, method_noargs_thunk<K, method>); |
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165 | } |
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166 | |
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167 | template<class K, void (K::*method)()> |
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168 | static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents) |
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169 | { |
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170 | K *obj = static_cast<K *>(w->data); |
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171 | (obj->*method) (); |
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172 | } |
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173 | |
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174 | void operator ()(int events = EV_UNDEF) |
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175 | { |
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176 | return ev_cb (static_cast<ev_watcher *>(this)) |
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177 | (static_cast<ev_watcher *>(this), events); |
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178 | } |
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179 | |
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180 | bool is_active () const |
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181 | { |
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182 | return ev_is_active (static_cast<const ev_watcher *>(this)); |
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183 | } |
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184 | |
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185 | bool is_pending () const |
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186 | { |
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187 | return ev_is_pending (static_cast<const ev_watcher *>(this)); |
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188 | } |
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189 | |
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190 | void feed_event (int revents) |
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191 | { |
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192 | ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents); |
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193 | } |
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194 | }; |
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195 | |
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196 | inline void delay (tstamp interval) |
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197 | { |
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198 | ev_sleep (interval); |
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199 | } |
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200 | |
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201 | inline int version_major () |
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202 | { |
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203 | return ev_version_major (); |
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204 | } |
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205 | |
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206 | inline int version_minor () |
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207 | { |
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208 | return ev_version_minor (); |
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209 | } |
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210 | |
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211 | inline unsigned int supported_backends () |
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212 | { |
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213 | return ev_supported_backends (); |
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214 | } |
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215 | |
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216 | inline unsigned int recommended_backends () |
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217 | { |
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218 | return ev_recommended_backends (); |
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219 | } |
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220 | |
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221 | inline unsigned int embeddable_backends () |
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222 | { |
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223 | return ev_embeddable_backends (); |
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224 | } |
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225 | |
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226 | inline void set_allocator (void *(*cb)(void *ptr, long size)) |
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227 | { |
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228 | ev_set_allocator (cb); |
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229 | } |
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230 | |
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231 | inline void set_syserr_cb (void (*cb)(const char *msg)) |
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232 | { |
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233 | ev_set_syserr_cb (cb); |
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234 | } |
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235 | |
63 | |
236 | |
64 | inline ev_tstamp now (EV_P) |
237 | inline ev_tstamp now (EV_P) |
65 | { |
238 | { |
66 | return ev_now (EV_A); |
239 | return ev_now (EV_A); |
67 | } |
240 | } |
68 | |
241 | |
69 | #if EV_MULTIPLICITY |
242 | #if EV_MULTIPLICITY |
70 | |
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71 | #define EV_CONSTRUCT(cppstem) \ |
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72 | EV_P; \ |
243 | #define EV_CONSTRUCT \ |
73 | \ |
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74 | void set (EV_P) \ |
244 | (EV_P = EV_DEFAULT) \ |
75 | { \ |
245 | { \ |
76 | this->EV_A = EV_A; \ |
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77 | } \ |
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78 | \ |
246 | set (EV_A); \ |
79 | template<class O1, class O2> \ |
247 | } |
80 | explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \ |
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81 | : callback<cppstem> (object, method), EV_A (EV_A) |
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82 | |
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83 | #else |
248 | #else |
84 | |
249 | #define EV_CONSTRUCT \ |
85 | #define EV_CONSTRUCT(cppstem) \ |
250 | () \ |
86 | template<class O1, class O2> \ |
251 | { \ |
87 | explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ |
252 | } |
88 | : callback<cppstem> (object, method) |
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89 | |
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90 | #endif |
253 | #endif |
91 | |
254 | |
92 | /* using a template here would require quite a bit more lines, |
255 | /* using a template here would require quite a bit more lines, |
93 | * so a macro solution was chosen */ |
256 | * so a macro solution was chosen */ |
94 | #define EV_BEGIN_WATCHER(cppstem,cstem) \ |
257 | #define EV_BEGIN_WATCHER(cppstem,cstem) \ |
95 | \ |
258 | \ |
96 | struct cppstem : ev_ ## cstem, callback<cppstem> \ |
259 | struct cppstem : base<ev_ ## cstem, cppstem> \ |
97 | { \ |
260 | { \ |
98 | EV_CONSTRUCT (cppstem) \ |
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99 | { \ |
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100 | ev_init (static_cast<ev_ ## cstem *>(this), thunk); \ |
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101 | } \ |
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102 | \ |
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103 | bool is_active () const \ |
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104 | { \ |
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105 | return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \ |
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106 | } \ |
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107 | \ |
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108 | bool is_pending () const \ |
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109 | { \ |
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110 | return ev_is_pending (static_cast<const ev_ ## cstem *>(this)); \ |
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111 | } \ |
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112 | \ |
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113 | void start () \ |
261 | void start () \ |
114 | { \ |
262 | { \ |
115 | ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
263 | ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
116 | } \ |
264 | } \ |
117 | \ |
265 | \ |
118 | void stop () \ |
266 | void stop () \ |
119 | { \ |
267 | { \ |
120 | ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
268 | ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
121 | } \ |
269 | } \ |
122 | \ |
270 | \ |
123 | void operator ()(int events = EV_UNDEF) \ |
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124 | { \ |
271 | cppstem EV_CONSTRUCT \ |
125 | return call (this, events); \ |
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126 | } \ |
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127 | \ |
272 | \ |
128 | ~cppstem () \ |
273 | ~cppstem () \ |
129 | { \ |
274 | { \ |
130 | stop (); \ |
275 | stop (); \ |
131 | } \ |
276 | } \ |
132 | \ |
277 | \ |
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278 | using base<ev_ ## cstem, cppstem>::set; \ |
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279 | \ |
133 | private: \ |
280 | private: \ |
134 | \ |
281 | \ |
135 | cppstem (const cppstem &o) \ |
282 | cppstem (const cppstem &o); \ |
136 | : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \ |
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137 | { /* disabled */ } \ |
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138 | \ |
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139 | void operator =(const cppstem &o) { /* disabled */ } \ |
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140 | \ |
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141 | static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \ |
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142 | { \ |
283 | \ |
143 | (*static_cast<cppstem *>(w))(revents); \ |
284 | cppstem & operator =(const cppstem &o); \ |
144 | } \ |
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145 | \ |
285 | \ |
146 | public: |
286 | public: |
147 | |
287 | |
148 | #define EV_END_WATCHER(cppstem,cstem) \ |
288 | #define EV_END_WATCHER(cppstem,cstem) \ |
149 | }; |
289 | }; |
… | |
… | |
191 | { |
331 | { |
192 | ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); |
332 | ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); |
193 | } |
333 | } |
194 | EV_END_WATCHER (timer, timer) |
334 | EV_END_WATCHER (timer, timer) |
195 | |
335 | |
196 | #if EV_PERIODICS |
336 | #if EV_PERIODIC_ENABLE |
197 | EV_BEGIN_WATCHER (periodic, periodic) |
337 | EV_BEGIN_WATCHER (periodic, periodic) |
198 | void set (ev_tstamp at, ev_tstamp interval = 0.) |
338 | void set (ev_tstamp at, ev_tstamp interval = 0.) |
199 | { |
339 | { |
200 | int active = is_active (); |
340 | int active = is_active (); |
201 | if (active) stop (); |
341 | if (active) stop (); |
… | |
… | |
212 | void again () |
352 | void again () |
213 | { |
353 | { |
214 | ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); |
354 | ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); |
215 | } |
355 | } |
216 | EV_END_WATCHER (periodic, periodic) |
356 | EV_END_WATCHER (periodic, periodic) |
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357 | #endif |
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358 | |
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359 | EV_BEGIN_WATCHER (sig, signal) |
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360 | void set (int signum) |
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361 | { |
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362 | int active = is_active (); |
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363 | if (active) stop (); |
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364 | ev_signal_set (static_cast<ev_signal *>(this), signum); |
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365 | if (active) start (); |
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366 | } |
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367 | |
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368 | void start (int signum) |
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369 | { |
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370 | set (signum); |
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371 | start (); |
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372 | } |
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373 | EV_END_WATCHER (sig, signal) |
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374 | |
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375 | EV_BEGIN_WATCHER (child, child) |
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376 | void set (int pid) |
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377 | { |
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378 | int active = is_active (); |
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379 | if (active) stop (); |
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380 | ev_child_set (static_cast<ev_child *>(this), pid); |
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381 | if (active) start (); |
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382 | } |
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383 | |
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384 | void start (int pid) |
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385 | { |
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386 | set (pid); |
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387 | start (); |
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388 | } |
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389 | EV_END_WATCHER (child, child) |
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390 | |
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391 | #if EV_STAT_ENABLE |
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392 | EV_BEGIN_WATCHER (stat, stat) |
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393 | void set (const char *path, ev_tstamp interval = 0.) |
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394 | { |
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395 | int active = is_active (); |
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396 | if (active) stop (); |
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397 | ev_stat_set (static_cast<ev_stat *>(this), path, interval); |
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398 | if (active) start (); |
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399 | } |
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400 | |
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401 | void start (const char *path, ev_tstamp interval = 0.) |
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402 | { |
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403 | stop (); |
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404 | set (path, interval); |
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405 | start (); |
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406 | } |
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407 | |
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408 | void update () |
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409 | { |
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410 | ev_stat_stat (EV_A_ static_cast<ev_stat *>(this)); |
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411 | } |
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412 | EV_END_WATCHER (stat, stat) |
217 | #endif |
413 | #endif |
218 | |
414 | |
219 | EV_BEGIN_WATCHER (idle, idle) |
415 | EV_BEGIN_WATCHER (idle, idle) |
220 | void set () { } |
416 | void set () { } |
221 | EV_END_WATCHER (idle, idle) |
417 | EV_END_WATCHER (idle, idle) |
… | |
… | |
226 | |
422 | |
227 | EV_BEGIN_WATCHER (check, check) |
423 | EV_BEGIN_WATCHER (check, check) |
228 | void set () { } |
424 | void set () { } |
229 | EV_END_WATCHER (check, check) |
425 | EV_END_WATCHER (check, check) |
230 | |
426 | |
231 | EV_BEGIN_WATCHER (sig, signal) |
427 | #if EV_EMBED_ENABLE |
232 | void set (int signum) |
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233 | { |
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234 | int active = is_active (); |
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235 | if (active) stop (); |
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236 | ev_signal_set (static_cast<ev_signal *>(this), signum); |
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237 | if (active) start (); |
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238 | } |
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239 | |
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240 | void start (int signum) |
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241 | { |
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242 | set (signum); |
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243 | start (); |
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244 | } |
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245 | EV_END_WATCHER (sig, signal) |
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246 | |
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247 | EV_BEGIN_WATCHER (child, child) |
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248 | void set (int pid) |
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249 | { |
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250 | int active = is_active (); |
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251 | if (active) stop (); |
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252 | ev_child_set (static_cast<ev_child *>(this), pid); |
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253 | if (active) start (); |
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254 | } |
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255 | |
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256 | void start (int pid) |
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257 | { |
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258 | set (pid); |
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259 | start (); |
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260 | } |
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261 | EV_END_WATCHER (child, child) |
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262 | |
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263 | #if EV_MULTIPLICITY |
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264 | |
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265 | EV_BEGIN_WATCHER (embed, embed) |
428 | EV_BEGIN_WATCHER (embed, embed) |
266 | void set (struct ev_loop *loop) |
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267 | { |
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268 | int active = is_active (); |
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269 | if (active) stop (); |
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270 | ev_embed_set (static_cast<ev_embed *>(this), loop); |
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271 | if (active) start (); |
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272 | } |
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273 | |
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274 | void start (struct ev_loop *embedded_loop) |
429 | void start (struct ev_loop *embedded_loop) |
275 | { |
430 | { |
276 | set (embedded_loop); |
431 | stop (); |
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432 | ev_embed_set (static_cast<ev_embed *>(this), embedded_loop); |
277 | start (); |
433 | start (); |
278 | } |
434 | } |
279 | |
435 | |
280 | void sweep () |
436 | void sweep () |
281 | { |
437 | { |
282 | ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this)); |
438 | ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this)); |
283 | } |
439 | } |
284 | EV_END_WATCHER (embed, embed) |
440 | EV_END_WATCHER (embed, embed) |
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441 | #endif |
285 | |
442 | |
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443 | #if EV_FORK_ENABLE |
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444 | EV_BEGIN_WATCHER (fork, fork) |
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445 | void set () { } |
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446 | EV_END_WATCHER (fork, fork) |
286 | #endif |
447 | #endif |
287 | |
448 | |
288 | #undef EV_CONSTRUCT |
449 | #undef EV_CONSTRUCT |
289 | #undef EV_BEGIN_WATCHER |
450 | #undef EV_BEGIN_WATCHER |
290 | #undef EV_END_WATCHER |
451 | #undef EV_END_WATCHER |