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3 | |
3 | |
4 | #include "ev.h" |
4 | #include "ev.h" |
5 | |
5 | |
6 | namespace ev { |
6 | namespace ev { |
7 | |
7 | |
8 | template<class watcher> |
8 | template<class ev_watcher, class watcher> |
9 | class callback |
9 | struct base : ev_watcher |
10 | { |
10 | { |
11 | struct klass; // it is vital that this is never defined |
11 | #if EV_MULTIPLICITY |
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12 | EV_P; |
12 | |
13 | |
13 | klass *o; |
14 | void set (EV_P) |
14 | void (klass::*m)(watcher &, int); |
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15 | |
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16 | public: |
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17 | template<class O1, class O2> |
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18 | explicit callback (O1 *object, void (O2::*method)(watcher &, int)) |
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19 | { |
15 | { |
20 | o = reinterpret_cast<klass *>(object); |
16 | this->EV_A = EV_A; |
21 | m = reinterpret_cast<void (klass::*)(watcher &, int)>(method); |
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22 | } |
17 | } |
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18 | #endif |
23 | |
19 | |
24 | // this works because a standards-compliant C++ compiler |
20 | base () |
25 | // basically can't help it: it doesn't have the knowledge |
21 | { |
26 | // required to miscompile (klass is not defined anywhere |
22 | ev_init (this, 0); |
27 | // and nothing is known about the constructor arguments) :) |
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28 | void call (watcher *w, int revents) |
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29 | { |
23 | } |
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24 | |
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25 | void set_ (void *object, void (*cb)(ev_watcher *w, int revents)) |
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26 | { |
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27 | this->data = object; |
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28 | ev_set_cb (static_cast<ev_watcher *>(this), cb); |
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29 | } |
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30 | |
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31 | template<class K, void (K::*method)(watcher &w, int)> |
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32 | void set (K *object) |
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33 | { |
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34 | set_ (object, method_thunk<K, method>); |
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35 | } |
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36 | |
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37 | template<class K, void (K::*method)(watcher &w, int)> |
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38 | static void method_thunk (ev_watcher *w, int revents) |
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39 | { |
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40 | watcher *self = static_cast<watcher *>(w); |
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41 | K *obj = static_cast<K *>(self->data); |
30 | (o->*m) (*w, revents); |
42 | (obj->*method) (*self, revents); |
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43 | } |
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44 | |
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45 | template<class K, void (K::*method)(watcher &w, int) const> |
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46 | void set (const K *object) |
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47 | { |
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48 | set_ (object, const_method_thunk<K, method>); |
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49 | } |
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50 | |
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51 | template<class K, void (K::*method)(watcher &w, int) const> |
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52 | static void const_method_thunk (ev_watcher *w, int revents) |
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53 | { |
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54 | watcher *self = static_cast<watcher *>(w); |
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55 | K *obj = static_cast<K *>(self->data); |
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56 | (obj->*method) (*self, revents); |
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57 | } |
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58 | |
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59 | template<void (*function)(watcher &w, int)> |
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60 | void set () |
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61 | { |
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62 | set_ (0, function_thunk<function>); |
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63 | } |
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64 | |
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65 | template<void (*function)(watcher &w, int)> |
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66 | static void function_thunk (ev_watcher *w, int revents) |
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67 | { |
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68 | watcher *self = static_cast<watcher *>(w); |
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69 | function (*self, revents); |
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70 | } |
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71 | |
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72 | void operator ()(int events = EV_UNDEF) |
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73 | { |
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74 | return e_cb (static_cast<ev_watcher *>(this)) (events); |
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75 | } |
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76 | |
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77 | bool is_active () const |
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78 | { |
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79 | return ev_is_active (static_cast<const ev_watcher *>(this)); |
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80 | } |
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81 | |
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82 | bool is_pending () const |
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83 | { |
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84 | return ev_is_pending (static_cast<const ev_watcher *>(this)); |
31 | } |
85 | } |
32 | }; |
86 | }; |
33 | |
87 | |
34 | enum { |
88 | enum { |
35 | UNDEF = EV_UNDEF, |
89 | UNDEF = EV_UNDEF, |
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55 | { |
109 | { |
56 | return ev_now (EV_A); |
110 | return ev_now (EV_A); |
57 | } |
111 | } |
58 | |
112 | |
59 | #if EV_MULTIPLICITY |
113 | #if EV_MULTIPLICITY |
60 | |
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61 | #define EV_CONSTRUCT(cppstem) \ |
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62 | EV_P; \ |
114 | #define EV_CONSTRUCT \ |
63 | \ |
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64 | void set (EV_P) \ |
115 | (EV_P = EV_DEFAULT) \ |
65 | { \ |
116 | { \ |
66 | this->EV_A = EV_A; \ |
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67 | } \ |
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68 | \ |
117 | set (EV_A); \ |
69 | template<class O1, class O2> \ |
118 | } |
70 | explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int), EV_P = ev_default_loop (0)) \ |
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71 | : callback<cppstem> (object, method), EV_A (EV_A) |
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72 | |
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73 | #else |
119 | #else |
74 | |
120 | #define EV_CONSTRUCT \ |
75 | #define EV_CONSTRUCT(cppstem) \ |
121 | () \ |
76 | template<class O1, class O2> \ |
122 | { \ |
77 | explicit cppstem (O1 *object, void (O2::*method)(cppstem &, int)) \ |
123 | } |
78 | : callback<cppstem> (object, method) |
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79 | |
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80 | #endif |
124 | #endif |
81 | |
125 | |
82 | /* using a template here would require quite a bit more lines, |
126 | /* using a template here would require quite a bit more lines, |
83 | * so a macro solution was chosen */ |
127 | * so a macro solution was chosen */ |
84 | #define EV_BEGIN_WATCHER(cppstem,cstem) \ |
128 | #define EV_BEGIN_WATCHER(cppstem,cstem) \ |
85 | \ |
129 | \ |
86 | struct cppstem : ev_ ## cstem, callback<cppstem> \ |
130 | struct cppstem : base<ev_ ## cstem, cppstem> \ |
87 | { \ |
131 | { \ |
88 | EV_CONSTRUCT (cppstem) \ |
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89 | { \ |
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90 | ev_init (static_cast<ev_ ## cstem *>(this), thunk); \ |
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91 | } \ |
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92 | \ |
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93 | bool is_active () const \ |
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94 | { \ |
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95 | return ev_is_active (static_cast<const ev_ ## cstem *>(this)); \ |
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96 | } \ |
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97 | \ |
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98 | bool is_pending () const \ |
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99 | { \ |
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100 | return ev_is_pending (static_cast<const ev_ ## cstem *>(this)); \ |
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101 | } \ |
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102 | \ |
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103 | void start () \ |
132 | void start () \ |
104 | { \ |
133 | { \ |
105 | ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
134 | ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
106 | } \ |
135 | } \ |
107 | \ |
136 | \ |
108 | void stop () \ |
137 | void stop () \ |
109 | { \ |
138 | { \ |
110 | ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
139 | ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \ |
111 | } \ |
140 | } \ |
112 | \ |
141 | \ |
113 | void operator ()(int events = EV_UNDEF) \ |
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114 | { \ |
142 | cppstem EV_CONSTRUCT \ |
115 | return call (this, events); \ |
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116 | } \ |
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117 | \ |
143 | \ |
118 | ~cppstem () \ |
144 | ~cppstem () \ |
119 | { \ |
145 | { \ |
120 | stop (); \ |
146 | stop (); \ |
121 | } \ |
147 | } \ |
122 | \ |
148 | \ |
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149 | using base<ev_ ## cstem, cppstem>::set; \ |
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150 | \ |
123 | private: \ |
151 | private: \ |
124 | \ |
152 | \ |
125 | cppstem (const cppstem &o) \ |
153 | cppstem (const cppstem &o) \ |
126 | : callback<cppstem> (this, (void (cppstem::*)(cppstem &, int))0) \ |
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127 | { /* disabled */ } \ |
154 | { /* disabled */ } \ |
128 | \ |
155 | \ |
129 | void operator =(const cppstem &o) { /* disabled */ } \ |
156 | void operator =(const cppstem &o) { /* disabled */ } \ |
130 | \ |
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131 | static void thunk (EV_P_ struct ev_ ## cstem *w, int revents) \ |
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132 | { \ |
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133 | (*static_cast<cppstem *>(w))(revents); \ |
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134 | } \ |
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135 | \ |
157 | \ |
136 | public: |
158 | public: |
137 | |
159 | |
138 | #define EV_END_WATCHER(cppstem,cstem) \ |
160 | #define EV_END_WATCHER(cppstem,cstem) \ |
139 | }; |
161 | }; |