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Comparing EV/Makefile.PL (file contents):
Revision 1.22 by root, Sat Nov 17 01:41:33 2007 UTC vs.
Revision 1.36 by root, Wed Oct 29 17:41:11 2008 UTC

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

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