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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 1.32 by root, Sun Apr 6 09:53:16 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
… …
65print <<EOF; 66print <<EOF;
66 67
67*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 68*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
68 69
69 70
71Another useful bit of functionality is the Linux eventfd, which is useful
72for faster signal handling (don't care) and intra-thread communications
73(mostly useful for embedding). Kernel support for this will be probed at
74runtime, but your libc must contain the necessary wrapper. Glibc 2.7 and
75later should have this wrapper.
76
77EOF
78
79$DEFINE .= " -DEV_USE_EVENTFD=" . (0 + (prompt ("Enable linux eventfd support (y/n)?", (-e "/usr/include/sys/eventfd.h") ? "y" : "n") =~ /[yY]/));
80
81print <<EOF;
82
83*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
84
85
70EV can use various backends with various portability issue. The select 86EV can use various backends with various portability issue. The select
71backend is the most portable and makes for a good fallback, but it can be 87backend is the most portable and makes for a good fallback, but it can be
72limited to a low number of file descriptors and/or might not compile. If 88limited to a low number of file descriptors and/or might not compile. If
73you have problems with compiling ev_select.c, you might try to play around 89you have problems with compiling ev_select.c, you might try to play around
74with disabling it here, or forcing it to use the fd_set provided by your 90with disabling it here, or forcing it to use the fd_set provided by your
… …
116print <<EOF; 132print <<EOF;
117 133
118*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 134*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
119 135
120 136
121EV by default uses select, which makes it hard to write efficient servers, 137Select 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 138number of active connections is much lower than the watched ones. GNU/Linux
123ones. GNU/Linux systems have a more scalable method called "epoll", which 139systems 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 140this 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, 141can 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. 142fall back to using select when epoll isn't available. If unsure, accept
127If unsure, accept the default. 143the default.
128 144
129EOF 145EOF
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
133print <<EOF; 149print <<EOF;
134 150
135*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 151*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
136 152
137 153
138Similarly to the epoll backend above, EV can take advantage of kqueue 154Similarly 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 155many 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, 156safe 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.
144 157
145EOF 158Note that kqueue is broken on most operating systems, so by default it
159won't be used on many platforms, but you can still create your own event
160loop with qkueue backend.
146 161
162Here is what we know:
163
164NetBSD: partially working in at least 3.1. Yeah! :)
165FreeBSD: broken on at least 6.2-STABLE,
166 sockets *likely* work, ptys definitely don't.
167OpenBSD: reports indicate that it likely doesn't work
168 (similar problems as on FreeBSD).
169OS X: completely, utterly broken on at least < 10.5.
170
171EOF
172
173my $can_kqueue = -e "/usr/include/sys/event.h";
174
147$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)?", $can_kqueue ? "y" : "n") =~ /[yY]/));
148 176
149print <<EOF; 177print <<EOF;
150 178
151*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 179*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
152 180
153 181
154Similarly to the kqueue backend above, EV can take advantage of the 182Similarly to the kqueue backend above, EV can take advantage of the
155solaris 10 port interface. Support for port will be detected at runtime, 183solaris 10 event port interface. Support for event ports will be detected
156with a safe fallback to other methods when it cannot be used. 184at runtime, with a safe fallback to other methods when it cannot be used.
157 185
158EOF 186EOF
159 187
160$DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable port backend (y/n)?", (-e "/usr/include/sys/port.h") ? "y" : "n") =~ /[yY]/)); 188$DEFINE .= " -DEV_USE_PORT=" . (0 + (prompt ("Enable event port backend (y/n)?", (-e "/usr/include/sys/port.h") ? "y" : "n") =~ /[yY]/));
161 189
162print <<EOF; 190print <<EOF;
163 191
164*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 192*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
165 193
166 194
167EV needs the functions pthread_atfork and clock_gettime. On most systems 195EV needs the functions pthread_atfork and clock_gettime. On most systems
168you need some special libraries for this (such as -lrt and -lpthread). You 196you need some special libraries for this (such as -lrt and -lpthread). You
169can specify additional libraries to provide these calls now, or accept the 197can specify additional libraries to provide these calls (and any other
170default. 198required by EV) now, or accept the default.
171 199
172EOF 200EOF
173 201
202$SOLARIS_LIBS = $^O =~ /solaris/ ? " -lsocket -lnsl" : "";
203
174$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
206
207print <<EOF;
208
209*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
210
211
212A backend of a different kind is the Linux inotify(7) interface, which can
213be used to speed up (and reduce resource consumption) of stat watchers. If
214you have it, it is usually a good idea to enable it.
215
216EOF
217
218my $can_inotify = -e "/usr/include/sys/inotify.h";
219
220$DEFINE .= " -DEV_USE_INOTIFY=" . (0 + (prompt ("Enable inotify support (y/n)?", $can_inotify ? "y" : "n") =~ /[yY]/));
176 221
177print <<EOF; 222print <<EOF;
178 223
179*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 224*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
180 225
… …
190 SUFFIX => '.gz', 235 SUFFIX => '.gz',
191 }, 236 },
192 depend => { 237 depend => {
193 "EV.c" => "EV/EVAPI.h " 238 "EV.c" => "EV/EVAPI.h "
194 . "libev/ev.c libev/ev.h libev/ev_epoll.c libev/ev_select.c libev/ev_kqueue.c libev/ev_poll.c " 239 . "libev/ev.c libev/ev.h libev/ev_epoll.c libev/ev_select.c libev/ev_kqueue.c libev/ev_poll.c "
195 . "libev/event.h libev/event.c evdns.h evdns.c libev/ev_vars.h libev/ev_wrap.h", 240 . "libev/ev_vars.h libev/ev_wrap.h",
196 }, 241 },
197 INC => "-Ilibev", 242 INC => "-Ilibev",
198 DEFINE => "$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',
211 }, 255 },
212); 256);

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