… | |
… | |
38 | POSIX optionally offers support for a monotonic clock source. EV |
38 | POSIX optionally offers support for a monotonic clock source. EV |
39 | can take advantage of this clock source to detect time jumps |
39 | can take advantage of this clock source to detect time jumps |
40 | reliably. Unfortunately, some systems are bound to be broken, so you can |
40 | reliably. Unfortunately, some systems are bound to be broken, so you can |
41 | disable this here: you can completely disable the detection and use of |
41 | disable this here: you can completely disable the detection and use of |
42 | the monotonic clock by answering 'n' here. Support for this clock type |
42 | the monotonic clock by answering 'n' here. Support for this clock type |
43 | will otherwise be autodetected at both compile- and runtime. |
43 | will otherwise be autodetected at both compile- and runtime. (this setting |
|
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44 | currently affects the use of nanosleep over select as well). |
44 | |
45 | |
45 | EOF |
46 | EOF |
46 | |
47 | |
47 | $DEFINE .= " -DEV_USE_MONOTONIC=" . (0 + (prompt ("Enable optional support for CLOCK_MONOTONIC (y/n)?", "y") =~ /[yY]/)); |
48 | $DEFINE .= " -DEV_USE_MONOTONIC=" . (0 + (prompt ("Enable optional support for CLOCK_MONOTONIC (y/n)?", "y") =~ /[yY]/)); |
48 | |
49 | |
… | |
… | |
65 | print <<EOF; |
66 | print <<EOF; |
66 | |
67 | |
67 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
68 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
68 | |
69 | |
69 | |
70 | |
|
|
71 | Another useful bit of functionality is the Linux eventfd, which is useful |
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72 | for faster signal handling (don't care) and intra-thread communications |
|
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73 | (mostly useful for embedding). Kernel support for this will be probed at |
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74 | runtime, but your libc must contain the necessary wrapper. Glibc 2.7 and |
|
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75 | later should have this wrapper. |
|
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76 | |
|
|
77 | EOF |
|
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78 | |
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79 | $DEFINE .= " -DEV_USE_EVENTFD=" . (0 + (prompt ("Enable linux eventfd support (y/n)?", (-e "/usr/include/sys/eventfd.h") || $ENV{EV_EVENTFD} ? "y" : "n") =~ /[yY]/)); |
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80 | |
|
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81 | print <<EOF; |
|
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82 | |
|
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83 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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84 | |
|
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85 | |
70 | EV can use various backends with various portability issue. The select |
86 | EV can use various backends with various portability issue. The select |
71 | backend is the most portable and makes for a good fallback, but it can be |
87 | backend is the most portable and makes for a good fallback, but it can be |
72 | limited to a low number of file descriptors and/or might not compile. If |
88 | limited to a low number of file descriptors and/or might not compile. If |
73 | you have problems with compiling ev_select.c, you might try to play around |
89 | you have problems with compiling ev_select.c, you might try to play around |
74 | with disabling it here, or forcing it to use the fd_set provided by your |
90 | with disabling it here, or forcing it to use the fd_set provided by your |
… | |
… | |
116 | print <<EOF; |
132 | print <<EOF; |
117 | |
133 | |
118 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
134 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
119 | |
135 | |
120 | |
136 | |
121 | EV by default uses select, which makes it hard to write efficient servers, |
137 | Select and poll make it hard to write efficient servers, especially if the |
122 | especially if the number of active connections is much lower than the open |
138 | number of active connections is much lower than the watched ones. GNU/Linux |
123 | ones. GNU/Linux systems have a more scalable method called "epoll", which |
139 | systems have a more scalable method called "epoll", which EV can use. For |
124 | EV can use. For this to work, both your kernel and glibc have to support |
140 | this to work, both your kernel and glibc have to support epoll, but if you |
125 | epoll, but if you can compile it, the detection will be done at runtime, |
141 | can compile it, the detection will be done at runtime, and EV will safely |
126 | and EV will safely fall back to using select when epoll isn't available. |
142 | fall back to using select when epoll isn't available. If unsure, accept |
127 | If unsure, accept the default. |
143 | the default. |
128 | |
144 | |
129 | EOF |
145 | EOF |
130 | |
146 | |
131 | $DEFINE .= " -DEV_USE_EPOLL=" . (0 + (prompt ("Enable epoll backend (y/n)?", (-e "/usr/include/sys/epoll.h") ? "y" : "n") =~ /[yY]/)); |
147 | $DEFINE .= " -DEV_USE_EPOLL=" . (0 + (prompt ("Enable epoll backend (y/n)?", (-e "/usr/include/sys/epoll.h") ? "y" : "n") =~ /[yY]/)); |
132 | |
148 | |
133 | print <<EOF; |
149 | print <<EOF; |
134 | |
150 | |
135 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
151 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
136 | |
152 | |
137 | |
153 | |
138 | Similarly to the epoll backend above, EV can take advantage of kqueue |
154 | Similarly to the epoll backend above, EV can take advantage of kqueue on |
139 | on many BSD systems (it seems to be broken on Mac OS X though, but what |
155 | many BSD systems. Support for kqueue will be detected at runtime, with a |
140 | isn't broken on that shoddy platform... ah yes, the cash gushing by apple, |
156 | safe fallback to other methods when it cannot be used. |
141 | selling defective software works perfectly there). Support for kqueue will |
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142 | be detected at runtime, with a safe fallback to other methods when it |
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143 | cannot be used. |
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144 | |
157 | |
145 | EOF |
158 | Note that kqueue is broken on most operating systems, so by default it |
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159 | won't be used on many platforms, but you can still create your own event |
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160 | loop with qkueue backend. |
146 | |
161 | |
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162 | Here is what we know: |
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163 | |
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164 | NetBSD: partially working in at least 3.1. Yeah! :) |
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165 | FreeBSD: broken on at least 6.2-STABLE, |
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166 | sockets *likely* work, ptys definitely don't. |
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167 | OpenBSD: reports indicate that it likely doesn't work |
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168 | (similar problems as on FreeBSD). |
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169 | OS X: completely, utterly broken on at least < 10.5. |
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170 | |
|
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171 | EOF |
|
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172 | |
|
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173 | my $can_kqueue = -e "/usr/include/sys/event.h"; |
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174 | |
147 | $DEFINE .= " -DEV_USE_KQUEUE=" . (0 + (prompt ("Enable kqueue backend (y/n)?", (-e "/usr/include/sys/event.h") ? "y" : "n") =~ /[yY]/)); |
175 | $DEFINE .= " -DEV_USE_KQUEUE=" . (0 + (prompt ("Enable kqueue backend (y/n)?", $can_kqueue ? "y" : "n") =~ /[yY]/)); |
148 | |
176 | |
149 | print <<EOF; |
177 | print <<EOF; |
150 | |
178 | |
151 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
179 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
152 | |
180 | |
153 | |
181 | |
154 | Similarly to the kqueue backend above, EV can take advantage of the |
182 | Similarly to the kqueue backend above, EV can take advantage of the |
155 | solaris 10 port interface. Support for port will be detected at runtime, |
183 | solaris 10 event port interface. Support for event ports will be detected |
156 | with a safe fallback to other methods when it cannot be used. |
184 | at runtime, with a safe fallback to other methods when it cannot be used. |
157 | |
185 | |
158 | EOF |
186 | EOF |
159 | |
187 | |
160 | $DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable port backend (y/n)?", (-e "/usr/include/sys/port.h") ? "y" : "n") =~ /[yY]/)); |
188 | $DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable event port backend (y/n)?", (-e "/usr/include/sys/port.h") ? "y" : "n") =~ /[yY]/)); |
161 | |
189 | |
162 | print <<EOF; |
190 | print <<EOF; |
163 | |
191 | |
164 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
192 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
165 | |
193 | |
166 | |
194 | |
167 | EV needs the functions pthread_atfork and clock_gettime. On most systems |
195 | EV needs the functions pthread_atfork and clock_gettime. On most systems |
168 | you need some special libraries for this (such as -lrt and -lpthread). You |
196 | you need some special libraries for this (such as -lrt and -lpthread). You |
169 | can specify additional libraries to provide these calls now, or accept the |
197 | can specify additional libraries to provide these calls (and any other |
170 | default. |
198 | required by EV) now, or accept the default. |
171 | |
199 | |
172 | EOF |
200 | EOF |
173 | |
201 | |
|
|
202 | $SOLARIS_LIBS = $^O =~ /solaris/ ? " -lsocket -lnsl" : ""; |
|
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203 | |
174 | $LIBS = prompt "Extra libraries for pthread_atfork and clock_gettime?", "-lpthread -lrt"; |
204 | $LIBS = prompt "Extra libraries for pthread_atfork and clock_gettime?", "-lpthread -lrt$SOLARIS_LIBS"; |
175 | |
205 | |
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206 | |
|
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207 | print <<EOF; |
|
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208 | |
|
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209 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
|
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210 | |
|
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211 | |
|
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212 | A backend of a different kind is the Linux inotify(7) interface, which can |
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213 | be used to speed up (and reduce resource consumption) of stat watchers. If |
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214 | you have it, it is usually a good idea to enable it. |
|
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215 | |
|
|
216 | EOF |
|
|
217 | |
|
|
218 | my $can_inotify = -e "/usr/include/sys/inotify.h"; |
|
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219 | |
|
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220 | $DEFINE .= " -DEV_USE_INOTIFY=" . (0 + (prompt ("Enable inotify support (y/n)?", $can_inotify ? "y" : "n") =~ /[yY]/)); |
176 | |
221 | |
177 | print <<EOF; |
222 | print <<EOF; |
178 | |
223 | |
179 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
224 | *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
180 | |
225 | |
… | |
… | |
190 | SUFFIX => '.gz', |
235 | SUFFIX => '.gz', |
191 | }, |
236 | }, |
192 | depend => { |
237 | depend => { |
193 | "EV.c" => "EV/EVAPI.h " |
238 | "EV.c" => "EV/EVAPI.h " |
194 | . "libev/ev.c libev/ev.h libev/ev_epoll.c libev/ev_select.c libev/ev_kqueue.c libev/ev_poll.c " |
239 | . "libev/ev.c libev/ev.h libev/ev_epoll.c libev/ev_select.c libev/ev_kqueue.c libev/ev_poll.c " |
195 | . "libev/event.h libev/event.c evdns.h evdns.c libev/ev_vars.h libev/ev_wrap.h", |
240 | . "libev/ev_vars.h libev/ev_wrap.h", |
196 | }, |
241 | }, |
197 | INC => "-Ilibev", |
242 | INC => "-Ilibev", |
198 | DEFINE => "$DEFINE", |
243 | DEFINE => "$DEFINE", |
199 | NAME => "EV", |
244 | NAME => "EV", |
200 | LIBS => [$LIBS], |
245 | LIBS => [$LIBS], |
… | |
… | |
202 | @anyevent, |
247 | @anyevent, |
203 | }, |
248 | }, |
204 | VERSION_FROM => "EV.pm", |
249 | VERSION_FROM => "EV.pm", |
205 | PM => { |
250 | PM => { |
206 | 'EV.pm' => '$(INST_LIBDIR)/EV.pm', |
251 | 'EV.pm' => '$(INST_LIBDIR)/EV.pm', |
207 | 'EV/DNS.pm' => '$(INST_LIBDIR)/EV/DNS.pm', |
|
|
208 | 'EV/EVAPI.h' => '$(INST_LIBDIR)/EV/EVAPI.h', |
252 | 'EV/EVAPI.h' => '$(INST_LIBDIR)/EV/EVAPI.h', |
209 | 'EV/MakeMaker.pm' => '$(INST_LIBDIR)/EV/MakeMaker.pm', |
253 | 'EV/MakeMaker.pm' => '$(INST_LIBDIR)/EV/MakeMaker.pm', |
210 | 'libev/ev.h' => '$(INST_LIBDIR)/EV/ev.h', |
254 | 'libev/ev.h' => '$(INST_LIBDIR)/EV/ev.h', |
|
|
255 | 'libev/ev.pod' => '$(INST_LIBDIR)/EV/c_doc.pod', |
211 | }, |
256 | }, |
|
|
257 | MAN3PODS => { |
|
|
258 | 'EV.pm' => '$(INST_MAN3DIR)/EV.$(MAN3EXT)', |
|
|
259 | 'EV/MakeMaker.pm' => '$(INST_MAN3DIR)/EV::MakeMaker.$(MAN3EXT)', |
|
|
260 | 'libev/ev.pod' => '$(INST_MAN3DIR)/EV::c_doc.$(MAN3EXT)', |
|
|
261 | }, |
212 | ); |
262 | ); |
213 | |
263 | |
214 | |
264 | |