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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 | |
4 | /* work in progress, don't use unless you know what you are doing */ |
43 | #ifdef EV_H |
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44 | # include EV_H |
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45 | #else |
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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 | template<class ev_watcher, class watcher> |
9 | class callback |
52 | struct base : ev_watcher |
10 | { |
53 | { |
11 | struct object { }; |
54 | #if EV_MULTIPLICITY |
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55 | EV_P; |
12 | |
56 | |
13 | void *obj; |
57 | void set (EV_P) |
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 | { |
58 | { |
24 | ((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<void (O2::*)(watcher &, int)>(meth))) |
59 | this->EV_A = EV_A; |
25 | (w, e); |
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26 | } |
60 | } |
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61 | #endif |
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62 | |
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63 | base () |
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64 | { |
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65 | ev_init (this, 0); |
27 | }; |
66 | } |
28 | |
67 | |
29 | proxy_base *prxy; |
68 | void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) |
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 | } |
69 | { |
40 | |
70 | this->data = data; |
41 | void call (watcher *w, int e) const |
71 | ev_set_cb (static_cast<ev_watcher *>(this), cb); |
42 | { |
72 | } |
43 | return prxy->call (obj, meth, *w, e); |
73 | |
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74 | // method callback |
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75 | template<class K, void (K::*method)(watcher &w, int)> |
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76 | void set (K *object) |
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77 | { |
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78 | set_ (object, method_thunk<K, method>); |
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79 | } |
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80 | |
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81 | template<class K, void (K::*method)(watcher &w, int)> |
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82 | static void method_thunk (EV_P_ ev_watcher *w, int revents) |
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83 | { |
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84 | K *obj = static_cast<K *>(w->data); |
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85 | (obj->*method) (*static_cast<watcher *>(w), revents); |
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86 | } |
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87 | |
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88 | // const method callback |
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89 | template<class K, void (K::*method)(watcher &w, int) const> |
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90 | void set (const K *object) |
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91 | { |
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92 | set_ (object, const_method_thunk<K, method>); |
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93 | } |
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94 | |
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95 | template<class K, void (K::*method)(watcher &w, int) const> |
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96 | static void const_method_thunk (EV_P_ ev_watcher *w, int revents) |
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97 | { |
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98 | K *obj = static_cast<K *>(w->data); |
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99 | (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents); |
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100 | } |
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101 | |
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102 | // function callback |
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103 | template<void (*function)(watcher &w, int)> |
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104 | void set (void *data = 0) |
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105 | { |
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106 | set_ (data, function_thunk<function>); |
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107 | } |
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108 | |
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109 | template<void (*function)(watcher &w, int)> |
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110 | static void function_thunk (EV_P_ ev_watcher *w, int revents) |
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111 | { |
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112 | function (*static_cast<watcher *>(w), revents); |
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113 | } |
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114 | |
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115 | // simple callback |
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116 | template<class K, void (K::*method)()> |
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117 | void set (K *object) |
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118 | { |
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119 | set_ (object, method_noargs_thunk<K, method>); |
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120 | } |
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121 | |
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122 | template<class K, void (K::*method)()> |
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123 | static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents) |
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124 | { |
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125 | K *obj = static_cast<K *>(w->data); |
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126 | (obj->*method) (); |
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127 | } |
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128 | |
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129 | void operator ()(int events = EV_UNDEF) |
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130 | { |
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131 | return ev_cb (static_cast<ev_watcher *>(this)) |
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132 | (static_cast<ev_watcher *>(this), events); |
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133 | } |
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134 | |
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135 | bool is_active () const |
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136 | { |
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137 | return ev_is_active (static_cast<const ev_watcher *>(this)); |
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138 | } |
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139 | |
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140 | bool is_pending () const |
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141 | { |
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142 | return ev_is_pending (static_cast<const ev_watcher *>(this)); |
44 | } |
143 | } |
45 | }; |
144 | }; |
46 | |
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47 | #include "ev.h" |
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48 | |
145 | |
49 | enum { |
146 | enum { |
50 | UNDEF = EV_UNDEF, |
147 | UNDEF = EV_UNDEF, |
51 | NONE = EV_NONE, |
148 | NONE = EV_NONE, |
52 | READ = EV_READ, |
149 | READ = EV_READ, |
53 | WRITE = EV_WRITE, |
150 | WRITE = EV_WRITE, |
54 | TIMEOUT = EV_TIMEOUT, |
151 | TIMEOUT = EV_TIMEOUT, |
55 | PERIODIC = EV_PERIODIC, |
152 | PERIODIC = EV_PERIODIC, |
56 | SIGNAL = EV_SIGNAL, |
153 | SIGNAL = EV_SIGNAL, |
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154 | CHILD = EV_CHILD, |
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155 | STAT = EV_STAT, |
57 | IDLE = EV_IDLE, |
156 | IDLE = EV_IDLE, |
58 | CHECK = EV_CHECK, |
157 | CHECK = EV_CHECK, |
59 | PREPARE = EV_PREPARE, |
158 | PREPARE = EV_PREPARE, |
60 | CHILD = EV_CHILD, |
159 | FORK = EV_FORK, |
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160 | EMBED = EV_EMBED, |
61 | ERROR = EV_ERROR, |
161 | ERROR = EV_ERROR, |
62 | }; |
162 | }; |
63 | |
163 | |
64 | typedef ev_tstamp tstamp; |
164 | typedef ev_tstamp tstamp; |
65 | |
165 | |
… | |
… | |
67 | { |
167 | { |
68 | return ev_now (EV_A); |
168 | return ev_now (EV_A); |
69 | } |
169 | } |
70 | |
170 | |
71 | #if EV_MULTIPLICITY |
171 | #if EV_MULTIPLICITY |
72 | |
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73 | #define EV_CONSTRUCT(cppstem) \ |
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74 | EV_P; \ |
172 | #define EV_CONSTRUCT \ |
75 | \ |
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76 | void set (EV_P) \ |
173 | (EV_P = EV_DEFAULT) \ |
77 | { \ |
174 | { \ |
78 | this->EV_A = EV_A; \ |
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79 | } \ |
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80 | \ |
175 | set (EV_A); \ |
81 | template<class O1, class O2> \ |
176 | } |
82 | explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \ |
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83 | : callback<cppstem> (object, method), EV_A (EV_A) |
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84 | |
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85 | #else |
177 | #else |
86 | |
178 | #define EV_CONSTRUCT \ |
87 | #define EV_CONSTRUCT(cppstem) \ |
179 | () \ |
88 | template<class O1, class O2> \ |
180 | { \ |
89 | explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ |
181 | } |
90 | : callback<cppstem> (object, method) |
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91 | |
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92 | #endif |
182 | #endif |
93 | |
183 | |
94 | /* using a template here would require quite a bit more lines, |
184 | /* using a template here would require quite a bit more lines, |
95 | * so a macro solution was chosen */ |
185 | * so a macro solution was chosen */ |
96 | #define EV_DECLARE_WATCHER(cppstem,cstem) \ |
186 | #define EV_BEGIN_WATCHER(cppstem,cstem) \ |
97 | \ |
187 | \ |
98 | extern "C" void cb_ ## cppstem (struct ev_ ## cstem *w, int revents); \ |
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99 | \ |
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100 | struct cppstem : ev_ ## cstem, callback<cppstem> \ |
188 | struct cppstem : base<ev_ ## cstem, cppstem> \ |
101 | { \ |
189 | { \ |
102 | EV_CONSTRUCT (cppstem) \ |
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103 | { \ |
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104 | ev_init (static_cast<ev_ ## cstem *>(this), cb_ ## cppstem); \ |
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105 | } \ |
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106 | \ |
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107 | bool is_active () const \ |
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108 | { \ |
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109 | return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \ |
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110 | } \ |
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111 | \ |
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112 | bool is_pending () const \ |
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113 | { \ |
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114 | return ev_is_pending (static_cast<const ev_ ## cstem *>(this)); \ |
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115 | } \ |
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116 | \ |
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117 | void start () \ |
190 | void start () \ |
118 | { \ |
191 | { \ |
119 | ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
192 | ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
120 | } \ |
193 | } \ |
121 | \ |
194 | \ |
122 | void stop () \ |
195 | void stop () \ |
123 | { \ |
196 | { \ |
124 | ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
197 | ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
125 | } \ |
198 | } \ |
126 | \ |
199 | \ |
127 | void operator ()(int events = EV_UNDEF) \ |
200 | cppstem EV_CONSTRUCT \ |
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201 | \ |
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202 | ~cppstem () \ |
128 | { \ |
203 | { \ |
129 | return call (this, events); \ |
204 | stop (); \ |
130 | } \ |
205 | } \ |
131 | \ |
206 | \ |
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207 | using base<ev_ ## cstem, cppstem>::set; \ |
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208 | \ |
132 | private: \ |
209 | private: \ |
133 | \ |
210 | \ |
134 | cppstem (const cppstem &o) \ |
211 | cppstem (const cppstem &o) \ |
135 | : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \ |
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136 | { /* disabled */ } \ |
212 | { /* disabled */ } \ |
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213 | \ |
137 | void operator =(const cppstem &o) { /* disabled */ } \ |
214 | void operator =(const cppstem &o) { /* disabled */ } \ |
138 | \ |
215 | \ |
139 | public: |
216 | public: |
140 | |
217 | |
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218 | #define EV_END_WATCHER(cppstem,cstem) \ |
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219 | }; |
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220 | |
141 | EV_DECLARE_WATCHER (io, io) |
221 | EV_BEGIN_WATCHER (io, io) |
142 | void set (int fd, int events) |
222 | void set (int fd, int events) |
143 | { |
223 | { |
144 | int active = is_active (); |
224 | int active = is_active (); |
145 | if (active) stop (); |
225 | if (active) stop (); |
146 | ev_io_set (static_cast<ev_io *>(this), fd, events); |
226 | ev_io_set (static_cast<ev_io *>(this), fd, events); |
… | |
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158 | void start (int fd, int events) |
238 | void start (int fd, int events) |
159 | { |
239 | { |
160 | set (fd, events); |
240 | set (fd, events); |
161 | start (); |
241 | start (); |
162 | } |
242 | } |
163 | }; |
243 | EV_END_WATCHER (io, io) |
164 | |
244 | |
165 | EV_DECLARE_WATCHER (timer, timer) |
245 | EV_BEGIN_WATCHER (timer, timer) |
166 | void set (ev_tstamp after, ev_tstamp repeat = 0.) |
246 | void set (ev_tstamp after, ev_tstamp repeat = 0.) |
167 | { |
247 | { |
168 | int active = is_active (); |
248 | int active = is_active (); |
169 | if (active) stop (); |
249 | if (active) stop (); |
170 | ev_timer_set (static_cast<ev_timer *>(this), after, repeat); |
250 | ev_timer_set (static_cast<ev_timer *>(this), after, repeat); |
… | |
… | |
179 | |
259 | |
180 | void again () |
260 | void again () |
181 | { |
261 | { |
182 | ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); |
262 | ev_timer_again (EV_A_ static_cast<ev_timer *>(this)); |
183 | } |
263 | } |
184 | }; |
264 | EV_END_WATCHER (timer, timer) |
185 | |
265 | |
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266 | #if EV_PERIODIC_ENABLE |
186 | EV_DECLARE_WATCHER (periodic, periodic) |
267 | EV_BEGIN_WATCHER (periodic, periodic) |
187 | void set (ev_tstamp at, ev_tstamp interval = 0.) |
268 | void set (ev_tstamp at, ev_tstamp interval = 0.) |
188 | { |
269 | { |
189 | int active = is_active (); |
270 | int active = is_active (); |
190 | if (active) stop (); |
271 | if (active) stop (); |
191 | ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0); |
272 | ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0); |
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200 | |
281 | |
201 | void again () |
282 | void again () |
202 | { |
283 | { |
203 | ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); |
284 | ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this)); |
204 | } |
285 | } |
205 | }; |
286 | EV_END_WATCHER (periodic, periodic) |
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287 | #endif |
206 | |
288 | |
207 | EV_DECLARE_WATCHER (idle, idle) |
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208 | }; |
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209 | |
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210 | EV_DECLARE_WATCHER (prepare, prepare) |
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211 | }; |
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212 | |
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213 | EV_DECLARE_WATCHER (check, check) |
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214 | }; |
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215 | |
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216 | EV_DECLARE_WATCHER (sig, signal) |
289 | EV_BEGIN_WATCHER (sig, signal) |
217 | void set (int signum) |
290 | void set (int signum) |
218 | { |
291 | { |
219 | int active = is_active (); |
292 | int active = is_active (); |
220 | if (active) stop (); |
293 | if (active) stop (); |
221 | ev_signal_set (static_cast<ev_signal *>(this), signum); |
294 | ev_signal_set (static_cast<ev_signal *>(this), signum); |
… | |
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225 | void start (int signum) |
298 | void start (int signum) |
226 | { |
299 | { |
227 | set (signum); |
300 | set (signum); |
228 | start (); |
301 | start (); |
229 | } |
302 | } |
230 | }; |
303 | EV_END_WATCHER (sig, signal) |
231 | |
304 | |
232 | EV_DECLARE_WATCHER (child, child) |
305 | EV_BEGIN_WATCHER (child, child) |
233 | void set (int pid) |
306 | void set (int pid) |
234 | { |
307 | { |
235 | int active = is_active (); |
308 | int active = is_active (); |
236 | if (active) stop (); |
309 | if (active) stop (); |
237 | ev_child_set (static_cast<ev_child *>(this), pid); |
310 | ev_child_set (static_cast<ev_child *>(this), pid); |
… | |
… | |
241 | void start (int pid) |
314 | void start (int pid) |
242 | { |
315 | { |
243 | set (pid); |
316 | set (pid); |
244 | start (); |
317 | start (); |
245 | } |
318 | } |
246 | }; |
319 | EV_END_WATCHER (child, child) |
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320 | |
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321 | #if EV_STAT_ENABLE |
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322 | EV_BEGIN_WATCHER (stat, stat) |
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323 | void set (const char *path, ev_tstamp interval = 0.) |
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324 | { |
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325 | int active = is_active (); |
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326 | if (active) stop (); |
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327 | ev_stat_set (static_cast<ev_stat *>(this), path, interval); |
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328 | if (active) start (); |
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329 | } |
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330 | |
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331 | void start (const char *path, ev_tstamp interval = 0.) |
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332 | { |
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333 | stop (); |
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334 | set (path, interval); |
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335 | start (); |
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336 | } |
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337 | |
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338 | void update () |
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339 | { |
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340 | ev_stat_stat (EV_A_ static_cast<ev_stat *>(this)); |
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341 | } |
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342 | EV_END_WATCHER (stat, stat) |
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343 | #endif |
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344 | |
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345 | EV_BEGIN_WATCHER (idle, idle) |
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346 | void set () { } |
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347 | EV_END_WATCHER (idle, idle) |
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348 | |
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349 | EV_BEGIN_WATCHER (prepare, prepare) |
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350 | void set () { } |
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351 | EV_END_WATCHER (prepare, prepare) |
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352 | |
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353 | EV_BEGIN_WATCHER (check, check) |
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354 | void set () { } |
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355 | EV_END_WATCHER (check, check) |
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356 | |
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357 | #if EV_EMBED_ENABLE |
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358 | EV_BEGIN_WATCHER (embed, embed) |
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359 | void start (struct ev_loop *embedded_loop) |
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360 | { |
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361 | stop (); |
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362 | ev_embed_set (static_cast<ev_embed *>(this), embedded_loop); |
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363 | start (); |
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364 | } |
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365 | |
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366 | void sweep () |
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367 | { |
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368 | ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this)); |
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369 | } |
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370 | EV_END_WATCHER (embed, embed) |
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371 | #endif |
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372 | |
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373 | #if EV_FORK_ENABLE |
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374 | EV_BEGIN_WATCHER (fork, fork) |
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375 | void set () { } |
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376 | EV_END_WATCHER (fork, fork) |
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377 | #endif |
247 | |
378 | |
248 | #undef EV_CONSTRUCT |
379 | #undef EV_CONSTRUCT |
|
|
380 | #undef EV_BEGIN_WATCHER |
249 | #undef EV_DECLARE_WATCHER |
381 | #undef EV_END_WATCHER |
250 | } |
382 | } |
251 | |
383 | |
252 | #endif |
384 | #endif |
253 | |
385 | |