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use ExtUtils::MakeMaker; |
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|
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use 5.005; |
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|
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use Config; |
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|
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$|=1; |
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|
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$DEFINE = ""; |
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|
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$DEFINE .= " -DHAVE_MMAP" if $Config{d_mmap} eq "define" && $Config{d_munmap} eq "define"; |
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|
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if ($^O =~ /win32/i or $^O =~ /cygwin/) { |
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$DEFINE = " -DCORO_LOOSE"; |
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} elsif ($^O =~ /irix/) { |
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$iface = "i"; |
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} elsif ($^O =~ /linux/) { |
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# default to setjmp/longjmp on non-x86... |
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$iface = $Config{archname} =~ /^i[3456]86-/ ? "l" : "s"; |
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} elsif ($^O =~ /(free|net|open)bsd/) { |
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# FreeBSD 4.x has ucontext.h but no makecontext et al (see BUGS section of |
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# man context). Assume the same problem for all other BSDs. |
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$iface = "s"; |
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} elsif ($^O =~ /solaris/) { |
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$iface = "s"; |
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} elsif ($^O =~ /darwin/) { |
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$iface = "s"; |
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} elsif (-e "/usr/include/ucontext.h") { |
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$iface = "u"; |
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} else { |
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$iface = "s"; |
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} |
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|
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print <<EOF; |
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|
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Version 0.12 introduced C context sharing. This makes it possible to share |
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the C stack and context between many coroutines, resulting in memory |
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savings and slight speed gains, at the cost of potential (but mostly |
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theoretical) segfaults. On my Linux/x86 machine this decreased the size |
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of a new coroutine from 9k to 5k, but the savings are much more apparent |
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on machines without mmap or good memory management. This algorithm relies |
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on the non-fact that the same machine stack pointer indicates the same |
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function call nesting level, which usually works good enough but might |
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fail... |
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|
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The default (enabled) has been in-use on productions servers for some time |
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now, without any problem reports so far. |
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|
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EOF |
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|
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print "Do you want to enable C context sharing (y/n) [y]? "; |
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|
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if (<> !~ /^\s*n/i) { |
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print "\nExperimental context sharing enabled.\n\n"; |
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$DEFINE .= " -DCORO_LAZY_STACK"; |
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} |
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|
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if ($iface) { |
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print <<EOF; |
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|
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Coro can use various ways to implement coroutines at the C level: |
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|
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u The unix ucontext functions are newer and not implemented in older |
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unices (or broken libc's like glibc-2.2.2 and below). They allow very |
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fast coroutine creation and fast switching, and, most importantly, are |
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very stable. |
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|
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s If the ucontext functions are not working or you don't want |
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to use them for other reasons you can try a workaround using |
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setjmp/longjmp/sigaltstack (also standard unix functions). Coroutine |
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creation is rather slow, but switching is very fast as well (often much |
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faster than with the ucontext functions). Unfortunately, glibc-2.1 and |
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below don't even feature a working sigaltstack. |
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|
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l Older GNU/Linux systems (glibc-2.1 and below) need this hack. Since it is |
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very linux-specific it is also quite fast for newer versions; when it |
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works, that is (currently x86 only)... |
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|
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i IRIX. For some reason, SGI really does not like to follow the unix |
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standard (does that surprise you?), so this workaround might be needed |
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(it's fast), although s and u should also work now. |
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|
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EOF |
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|
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retry: |
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print "Use which implementation,\n", |
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"<s>etjmp/longjump, <u>context, <i>rix or <l>inux [$iface]? "; |
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|
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my $r = <>; |
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$iface = lc $1 if $r =~ /(\S)/; |
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|
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if ($iface eq "u") { |
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$DEFINE .= " -DCORO_UCONTEXT"; |
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print "\nUsing ucontext implementation\n\n"; |
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conftest("TEST_makecontext"); |
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} elsif ($iface eq "s") { |
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$DEFINE .= " -DCORO_SJLJ"; |
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print "\nUsing setjmp/longjmp/sigaltstack implementation\n\n"; |
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conftest("TEST_sigaltstack"); |
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} elsif ($iface eq "l") { |
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$DEFINE .= " -DCORO_LINUX"; |
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print "\nUsing linux-specific implementation\n\n"; |
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} elsif ($iface eq "i") { |
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$DEFINE .= " -DCORO_IRIX"; |
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print "\nUsing irix-specific implementation\n\n"; |
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} else { |
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print "\nUnknown implementation \"$iface\"\n"; |
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goto retry; |
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} |
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} else { |
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print "\nUsing microsoft compatible coroutines\n\n"; |
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} |
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|
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WriteMakefile( |
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NAME => "Coro::State", |
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VERSION_FROM => "State.pm", |
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DEFINE => $DEFINE, |
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DIR => [], |
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); |
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|
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sub conftest { |
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my $type = shift; |
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|
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print "\nTrying to detect stack growth direction (for $type)\n"; |
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print "You might see some warnings, this should not concern you.\n\n"; |
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system "$Config{cc} $Config{ccflags} -D$type libcoro/conftest.c"; |
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|
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my $res = qx<./a.out>; |
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$res =~ s/\s+$//; |
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my ($sp, $ss) = split /,/, $res; |
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|
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print "\n\n*****************************************************************************\n"; |
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print "If the testsuite fails PLEASE provide the following information\n"; |
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print "to Marc Lehmann <pcg\@goof.com>: operating system name, version,\n"; |
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print "architecture name and this string '$sp|$ss'. Thanks a lot!\n";#d# |
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print "*****************************************************************************\n\n"; |
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|
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unlink "a.out"; |
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unlink "conftestval"; |
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} |
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|
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print <<EOF if $^O =~ /linux/; |
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|
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***************************************************************************** |
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* * |
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* HEY!! You are using Linux! That's not at all bad, but if you get seg- * |
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* faults with Coro almost all the time please refer to README.linux-glibc * |
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* * |
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***************************************************************************** |
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|
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EOF |
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|
