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20 | #ifndef VPE_IOM_H__ |
20 | #ifndef VPE_IOM_H__ |
21 | #define VPE_IOM_H__ |
21 | #define VPE_IOM_H__ |
22 | |
22 | |
23 | #include <cassert> |
23 | #include <cassert> |
24 | |
24 | |
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25 | #include "callback.h" |
25 | #include "rxvtvec.h" |
26 | #include "rxvtvec.h" |
26 | #include "callback.h" |
27 | |
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28 | #ifndef IOM_IO |
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29 | # define IOM_IO 1 |
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30 | #endif |
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31 | #ifndef IOM_TIME |
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32 | # define IOM_TIME 1 |
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33 | #endif |
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34 | #ifndef IOM_CHECK |
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35 | # define IOM_CHECK 1 |
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36 | #endif |
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37 | #ifndef IOM_IDLE |
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38 | # define IOM_IDLE 0 |
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39 | #endif |
27 | |
40 | |
28 | typedef double tstamp; |
41 | typedef double tstamp; |
29 | |
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30 | extern tstamp NOW; |
42 | extern tstamp NOW; |
31 | |
43 | |
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44 | #if IOM_IO |
32 | struct io_watcher; |
45 | struct io_watcher; |
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46 | #endif |
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47 | #if IOM_TIME |
33 | struct time_watcher; |
48 | struct time_watcher; |
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49 | #endif |
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50 | #if IOM_CHECK |
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51 | struct check_watcher; |
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52 | #endif |
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53 | #if IOM_IDLE |
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54 | struct idle_watcher; |
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55 | #endif |
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56 | |
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57 | template<class watcher> |
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58 | struct io_manager_vec : protected simplevec<watcher *> { |
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59 | friend class io_manager; |
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60 | protected: |
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61 | void erase_unordered (unsigned int pos) |
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62 | { |
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63 | watcher *w = (*this)[size () - 1]; |
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64 | pop_back (); |
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65 | |
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66 | if (size ()) |
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67 | if ((*this)[pos] = w) |
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68 | w->active = pos + 1; |
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69 | } |
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70 | }; |
34 | |
71 | |
35 | class io_manager { |
72 | class io_manager { |
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73 | #if IOM_IO |
36 | simplevec<io_watcher *> iow; |
74 | io_manager_vec<io_watcher> iow; |
37 | simplevec<time_watcher *> tw; // actually a heap |
75 | #endif |
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76 | #if IOM_CHECK |
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77 | io_manager_vec<check_watcher> cw; |
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78 | #endif |
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79 | #if IOM_TIME |
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80 | io_manager_vec<time_watcher> tw; |
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81 | #endif |
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82 | #if IOM_IDLE |
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83 | io_manager_vec<idle_watcher> iw; |
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84 | #endif |
38 | |
85 | |
39 | void idle_cb (time_watcher &w); time_watcher *idle; |
86 | template<class watcher> |
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87 | void reg (watcher *w, simplevec<watcher *> &queue); |
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88 | |
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89 | template<class watcher> |
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90 | void unreg (watcher *w, simplevec<watcher *> &queue); |
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91 | |
40 | public: |
92 | public: |
41 | // register a watcher |
93 | // register a watcher |
42 | void reg (io_watcher *w); |
94 | #if IOM_IO |
43 | void unreg (io_watcher *w); |
95 | void reg (io_watcher *w); void unreg (io_watcher *w); |
44 | void reg (time_watcher *w); |
96 | #endif |
45 | void unreg (time_watcher *w); |
97 | #if IOM_TIME |
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98 | void reg (time_watcher *w); void unreg (time_watcher *w); |
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99 | #endif |
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100 | #if IOM_CHECK |
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101 | void reg (check_watcher *w); void unreg (check_watcher *w); |
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102 | #endif |
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103 | #if IOM_IDLE |
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104 | void reg (idle_watcher *w); void unreg (idle_watcher *w); |
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105 | #endif |
46 | |
106 | |
47 | void loop (); |
107 | void loop (); |
48 | |
108 | |
49 | io_manager (); |
109 | io_manager (); |
50 | ~io_manager (); |
110 | ~io_manager (); |
51 | }; |
111 | }; |
52 | |
112 | |
53 | extern io_manager iom; // a singleton, together with it's construction/destruction problems. |
113 | extern io_manager iom; // a singleton, together with it's construction/destruction problems. |
54 | |
114 | |
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115 | struct watcher { |
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116 | int active; /* 0 == inactive, else index into respective vector */ |
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117 | |
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118 | watcher() : active(0) { } |
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119 | }; |
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120 | |
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121 | #if IOM_IO |
55 | enum { EVENT_READ = 1, EVENT_WRITE = 2 }; |
122 | enum { EVENT_READ = 1, EVENT_WRITE = 2 }; |
56 | |
123 | |
57 | struct io_watcher : callback2<void, io_watcher &, short> { |
124 | struct io_watcher : watcher, callback2<void, io_watcher &, short> { |
58 | int fd; |
125 | int fd; |
59 | short events; |
126 | short events; |
60 | |
127 | |
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128 | void set (int fd_, short events_) { fd = fd_; events = events_; } |
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129 | |
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130 | void set (short events_) { set (fd, events_); } |
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131 | void start () { iom.reg (this); } |
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132 | void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } |
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133 | void stop () { iom.unreg (this); } |
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134 | |
61 | template<class O1, class O2> |
135 | template<class O1, class O2> |
62 | io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) |
136 | io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) |
63 | : callback2<void, io_watcher &, short>(object,method) |
137 | : callback2<void, io_watcher &, short>(object,method) |
64 | { } |
138 | { } |
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139 | ~io_watcher () { stop (); } |
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140 | }; |
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141 | #endif |
65 | |
142 | |
66 | ~io_watcher (); |
143 | #if IOM_TIME |
67 | |
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68 | void set(int fd_, short events_) { fd = fd_; events = events_; } |
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69 | |
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70 | void set(short events_) { set (fd, events_); } |
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71 | void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } |
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72 | void stop () { iom.unreg (this); } |
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73 | }; |
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74 | |
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75 | #define TSTAMP_CANCEL -1. |
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76 | |
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77 | struct time_watcher : callback1<void, time_watcher &> { |
144 | struct time_watcher : watcher, callback1<void, time_watcher &> { |
78 | tstamp at; |
145 | tstamp at; |
79 | |
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80 | template<class O1, class O2> |
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81 | time_watcher (O1 *object, void (O2::*method)(time_watcher &)) |
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82 | : callback1<void, time_watcher &>(object,method) |
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83 | { } |
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84 | |
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85 | ~time_watcher (); |
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86 | |
146 | |
87 | void trigger (); |
147 | void trigger (); |
88 | |
148 | |
89 | void set (tstamp when) { at = when; } |
149 | void set (tstamp when) { at = when; } |
90 | void operator ()() { trigger (); } |
150 | void operator ()() { trigger (); } |
91 | void start () { iom.reg (this); } |
151 | void start () { iom.reg (this); } |
92 | void start (tstamp when) { set (when); iom.reg (this); } |
152 | void start (tstamp when) { set (when); iom.reg (this); } |
93 | void stop () { iom.unreg (this); } |
153 | void stop () { iom.unreg (this); } |
94 | |
154 | |
95 | void reset (tstamp when = TSTAMP_CANCEL) |
155 | template<class O1, class O2> |
96 | { |
156 | time_watcher (O1 *object, void (O2::*method)(time_watcher &)) |
97 | stop (); |
157 | : callback1<void, time_watcher &>(object,method) |
98 | at = when; |
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99 | } |
158 | { } |
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159 | ~time_watcher () { stop (); } |
100 | }; |
160 | }; |
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161 | #endif |
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162 | |
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163 | #if IOM_CHECK |
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164 | // run before checking for new events |
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165 | struct check_watcher : watcher, callback1<void, check_watcher &> { |
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166 | void start () { iom.reg (this); } |
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167 | void stop () { iom.unreg (this); } |
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168 | |
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169 | template<class O1, class O2> |
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170 | check_watcher (O1 *object, void (O2::*method)(check_watcher &)) |
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171 | : callback1<void, check_watcher &>(object,method) |
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172 | { } |
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173 | ~check_watcher () { stop (); } |
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174 | }; |
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175 | #endif |
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176 | |
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177 | #if IOM_IDLE |
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178 | // run after checking for any i/o, but before waiting |
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179 | struct idle_watcher : watcher, callback1<void, idle_watcher &> { |
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180 | void start () { iom.reg (this); } |
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181 | void stop () { iom.unreg (this); } |
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182 | |
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183 | template<class O1, class O2> |
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184 | idle_watcher (O1 *object, void (O2::*method)(idle_watcher &)) |
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185 | : callback1<void, idle_watcher &>(object,method) |
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186 | { } |
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187 | ~idle_watcher () { stop (); } |
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188 | }; |
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189 | #endif |
101 | |
190 | |
102 | #endif |
191 | #endif |
103 | |
192 | |