1 | /* |
1 | /* |
2 | iom.h -- generic I/O multiplexor |
2 | iom.h -- generic I/O multiplexor |
3 | Copyright (C) 2003 Marc Lehmann <pcg@goof.com> |
3 | Copyright (C) 2003, 2004 Marc Lehmann <pcg@goof.com> |
4 | |
4 | |
5 | This program is free software; you can redistribute it and/or modify |
5 | This program is free software; you can redistribute it and/or modify |
6 | it under the terms of the GNU General Public License as published by |
6 | it under the terms of the GNU General Public License as published by |
7 | the Free Software Foundation; either version 2 of the License, or |
7 | the Free Software Foundation; either version 2 of the License, or |
8 | (at your option) any later version. |
8 | (at your option) any later version. |
… | |
… | |
15 | You should have received a copy of the GNU General Public License |
15 | You should have received a copy of the GNU General Public License |
16 | along with this program; if not, write to the Free Software |
16 | along with this program; if not, write to the Free Software |
17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
17 | Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ |
18 | */ |
19 | |
19 | |
20 | #ifndef VPE_IOM_H__ |
20 | #ifndef IOM_H__ |
21 | #define VPE_IOM_H__ |
21 | #define IOM_H__ |
22 | |
22 | |
23 | #include <cassert> |
23 | // required: |
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24 | // - a vector template like simplevec or stl's vector |
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25 | // - defines for all watcher types required in your app |
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26 | // edit iom_conf.h as appropriate. |
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27 | #include "iom_conf.h" |
24 | |
28 | |
25 | #include "rxvtvec.h" |
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26 | #include "callback.h" |
29 | #include "callback.h" |
27 | |
30 | |
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31 | #ifndef IOM_IO |
28 | #define IOM_IO 1 |
32 | # define IOM_IO 0 |
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33 | #endif |
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34 | #ifndef IOM_TIME |
29 | #define IOM_TIME 1 |
35 | # define IOM_TIME 0 |
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36 | #endif |
30 | #undef IOM_CHECK |
37 | #ifndef IOM_CHECK |
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38 | # define IOM_CHECK 0 |
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39 | #endif |
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40 | #ifndef IOM_IDLE |
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41 | # define IOM_IDLE 0 |
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42 | #endif |
31 | |
43 | |
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44 | typedef double tstamp; |
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45 | extern tstamp NOW; |
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46 | |
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47 | struct watcher; |
32 | #if IOM_IO |
48 | #if IOM_IO |
33 | typedef double tstamp; |
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34 | extern tstamp NOW; |
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35 | |
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36 | struct io_watcher; |
49 | struct io_watcher; |
37 | #endif |
50 | #endif |
38 | #if IOM_TIME |
51 | #if IOM_TIME |
39 | struct time_watcher; |
52 | struct time_watcher; |
40 | #endif |
53 | #endif |
41 | #if IOM_CHECK |
54 | #if IOM_CHECK |
42 | struct check_watcher; |
55 | struct check_watcher; |
43 | #endif |
56 | #endif |
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57 | #if IOM_IDLE |
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58 | struct idle_watcher; |
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59 | #endif |
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60 | |
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61 | template<class watcher> |
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62 | struct io_manager_vec : vector<watcher *> { |
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63 | #if IOM_CHECK |
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64 | bool activity; |
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65 | #endif |
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66 | |
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67 | void erase_unordered (unsigned int pos) |
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68 | { |
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69 | watcher *w = (*this)[size () - 1]; |
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70 | pop_back (); |
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71 | |
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72 | if (size ()) |
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73 | if ((*this)[pos] = w) |
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74 | w->active = pos + 1; |
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75 | } |
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76 | }; |
44 | |
77 | |
45 | class io_manager { |
78 | class io_manager { |
46 | #if IOM_IO |
79 | #if IOM_IO |
47 | simplevec<io_watcher *> iow; |
80 | io_manager_vec<io_watcher> iow; |
48 | #endif |
81 | #endif |
49 | #if IOM_CHECK |
82 | #if IOM_CHECK |
50 | simplevec<check_watcher *> cw; |
83 | io_manager_vec<check_watcher> cw; |
51 | #endif |
84 | #endif |
52 | #if IOM_TIME |
85 | #if IOM_TIME |
53 | simplevec<time_watcher *> tw; |
86 | io_manager_vec<time_watcher> tw; |
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87 | #endif |
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88 | #if IOM_IDLE |
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89 | io_manager_vec<idle_watcher> iw; |
54 | #endif |
90 | #endif |
55 | |
91 | |
56 | template<class watcher> |
92 | template<class watcher> |
57 | void reg (watcher *w, simplevec<watcher *> &queue); |
93 | void reg (watcher *w, io_manager_vec<watcher> &queue); |
58 | |
94 | |
59 | template<class watcher> |
95 | template<class watcher> |
60 | void unreg (watcher *w, simplevec<watcher *> &queue); |
96 | void unreg (watcher *w, io_manager_vec<watcher> &queue); |
61 | |
97 | |
62 | public: |
98 | public: |
63 | // register a watcher |
99 | // register a watcher |
64 | #if IOM_IO |
100 | #if IOM_IO |
65 | void reg (io_watcher *w); void unreg (io_watcher *w); |
101 | void reg (io_watcher *w); void unreg (io_watcher *w); |
66 | #endif |
102 | #endif |
67 | #if IOM_TIME |
103 | #if IOM_TIME |
68 | void reg (time_watcher *w); void unreg (time_watcher *w); |
104 | void reg (time_watcher *w); void unreg (time_watcher *w); |
69 | #endif |
105 | #endif |
70 | #if IOM_CHECK |
106 | #if IOM_CHECK |
71 | void reg (check_watcher *w); void unreg (check_watcher *w); |
107 | void reg (check_watcher *w); void unreg (check_watcher *w); |
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108 | #endif |
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109 | #if IOM_IDLE |
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110 | void reg (idle_watcher *w); void unreg (idle_watcher *w); |
72 | #endif |
111 | #endif |
73 | |
112 | |
74 | void loop (); |
113 | void loop (); |
75 | |
114 | |
76 | io_manager (); |
115 | io_manager (); |
77 | ~io_manager (); |
116 | ~io_manager (); |
78 | }; |
117 | }; |
79 | |
118 | |
80 | extern io_manager iom; // a singleton, together with it's construction/destruction problems. |
119 | extern io_manager iom; // a singleton, together with it's construction/destruction problems. |
81 | |
120 | |
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121 | struct watcher { |
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122 | int active; /* 0 == inactive, else index into respective vector */ |
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123 | |
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124 | watcher () : active (0) { } |
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125 | }; |
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126 | |
82 | #if IOM_IO |
127 | #if IOM_IO |
83 | enum { EVENT_READ = 1, EVENT_WRITE = 2 }; |
128 | enum { EVENT_READ = 1, EVENT_WRITE = 2 }; |
84 | |
129 | |
85 | struct io_watcher : callback2<void, io_watcher &, short> { |
130 | struct io_watcher : watcher, callback2<void, io_watcher &, short> { |
86 | int fd; |
131 | int fd; |
87 | short events; |
132 | short events; |
88 | |
133 | |
89 | template<class O1, class O2> |
134 | void set (int fd_, short events_) { fd = fd_; events = events_; } |
90 | io_watcher (O1 *object, void (O2::*method)(io_watcher &, short)) |
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91 | : callback2<void, io_watcher &, short>(object,method) |
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92 | { } |
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93 | |
135 | |
94 | ~io_watcher (); |
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95 | |
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96 | void set(int fd_, short events_) { fd = fd_; events = events_; } |
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97 | |
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98 | void set(short events_) { set (fd, events_); } |
136 | void set (short events_) { set (fd, events_); } |
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137 | void start () { iom.reg (this); } |
99 | void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } |
138 | void start (int fd_, short events_) { set (fd_, events_); iom.reg (this); } |
100 | void stop () { iom.unreg (this); } |
139 | void stop () { iom.unreg (this); } |
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140 | |
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141 | template<class O1, class O2> |
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142 | io_watcher (O1 *object, void (O2::*method) (io_watcher &, short)) |
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143 | : callback2<void, io_watcher &, short> (object,method) |
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144 | { } |
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145 | ~io_watcher () { stop (); } |
101 | }; |
146 | }; |
102 | #endif |
147 | #endif |
103 | |
148 | |
104 | #if IOM_TIME |
149 | #if IOM_TIME |
105 | enum { TSTAMP_CANCEL = -1 }; |
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106 | |
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107 | struct time_watcher : callback1<void, time_watcher &> { |
150 | struct time_watcher : watcher, callback1<void, time_watcher &> { |
108 | tstamp at; |
151 | tstamp at; |
109 | |
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110 | template<class O1, class O2> |
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111 | time_watcher (O1 *object, void (O2::*method)(time_watcher &)) |
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112 | : callback1<void, time_watcher &>(object,method) |
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113 | { } |
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114 | |
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115 | ~time_watcher (); |
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116 | |
152 | |
117 | void trigger (); |
153 | void trigger (); |
118 | |
154 | |
119 | void set (tstamp when) { at = when; } |
155 | void set (tstamp when) { at = when; } |
120 | void operator ()() { trigger (); } |
156 | void operator () () { trigger (); } |
121 | void start () { iom.reg (this); } |
157 | void start () { iom.reg (this); } |
122 | void start (tstamp when) { set (when); iom.reg (this); } |
158 | void start (tstamp when) { set (when); iom.reg (this); } |
123 | void stop () { iom.unreg (this); } |
159 | void stop () { iom.unreg (this); } |
124 | |
160 | |
125 | void reset (tstamp when = TSTAMP_CANCEL) |
161 | template<class O1, class O2> |
126 | { |
162 | time_watcher (O1 *object, void (O2::*method) (time_watcher &)) |
127 | stop (); |
163 | : callback1<void, time_watcher &> (object,method), at (0) |
128 | at = when; |
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129 | } |
164 | { } |
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165 | ~time_watcher () { stop (); } |
130 | }; |
166 | }; |
131 | #endif |
167 | #endif |
132 | |
168 | |
133 | #if IOM_CHECK |
169 | #if IOM_CHECK |
134 | // run before checking for new events |
170 | // run before checking for new events |
135 | struct check_watcher : callback1<void, check_watcher &> { |
171 | struct check_watcher : watcher, callback1<void, check_watcher &> { |
136 | template<class O1, class O2> |
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137 | check_watcher (O1 *object, void (O2::*method)(check_watcher &)) |
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138 | : callback1<void, check_watcher &>(object,method) |
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139 | { } |
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140 | |
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141 | ~check_watcher (); |
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142 | |
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143 | void start () { iom.reg (this); } |
172 | void start () { iom.reg (this); } |
144 | void stop () { iom.unreg (this); } |
173 | void stop () { iom.unreg (this); } |
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174 | |
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175 | template<class O1, class O2> |
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176 | check_watcher (O1 *object, void (O2::*method) (check_watcher &)) |
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177 | : callback1<void, check_watcher &> (object,method) |
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178 | { } |
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179 | ~check_watcher () { stop (); } |
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180 | }; |
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181 | #endif |
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182 | |
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183 | #if IOM_IDLE |
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184 | // run after checking for any i/o, but before waiting |
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185 | struct idle_watcher : watcher, callback1<void, idle_watcher &> { |
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186 | void start () { iom.reg (this); } |
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187 | void stop () { iom.unreg (this); } |
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188 | |
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189 | template<class O1, class O2> |
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190 | idle_watcher (O1 *object, void (O2::*method) (idle_watcher &)) |
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191 | : callback1<void, idle_watcher &> (object,method) |
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192 | { } |
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193 | ~idle_watcher () { stop (); } |
145 | }; |
194 | }; |
146 | #endif |
195 | #endif |
147 | |
196 | |
148 | #endif |
197 | #endif |
149 | |
198 | |