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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/ or $^O =~ /mswin/) { |
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$iface = 'w'; |
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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 = $Config{archname} =~ /^(i[3456]86|amd64|x86_64)-/ ? "l" : "s"; |
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} elsif ($^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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$iface = "s"; |
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} elsif (-e "/usr/include/ucontext.h") { # shame on this heuristic |
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$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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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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C context sharing: This option makes it possible to share the C stack and |
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context between many coroutines, resulting in large memory savings and |
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slight speed gains, at the cost of potential (but mostly theoretical) |
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segfaults. On my Linux/x86 machine this decreased the size of a new |
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coroutine from 9k to 5k, but the savings are much more apparent on |
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machines without mmap or good memory management. |
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|
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The algorithm relies on the non-fact that the same machine stack pointer |
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indicates the same function call nesting level, which usually works good |
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enough (no known cases of it failing are known) but might fail in theory. |
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|
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The default (enabled) has been in use on productions servers for some |
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time now, without any problem reports, so you are encouraged to use the |
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default. |
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|
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EOF |
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|
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if (prompt ("Do you want to enable C context sharing (y/n)", "y") !~ /^\s*n/i) { |
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print "\nC 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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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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Coro can use a number of methods to implement coroutines at the C |
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level. The default chosen is based on your current confguration and is |
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correct in most cases, but you still can chose between these alternatives: |
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|
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u The unix 'ucontext.h' functions are relatively new and not implemented |
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or well-tested in older unices. They allow very fast coroutine creation |
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and reasonably fast switching, and, most importantly, are 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 GNU/Linux. Very old GNU/Linux systems (glibc-2.1 and below) need |
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this hack. Since it is very linux-specific it is also quite fast and |
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recommended even for newer versions; when it works, that is (currently |
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x86 and a few others only. If it compiles, it's usually ok). |
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|
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i IRIX. For some reason, SGI really does not like to follow the single |
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unix specification (does that surprise you?), so this workaround might |
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be needed (it's fast), although [s] and [u] should also work now. |
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|
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w Microsoft Windows. Try this on Microsoft Windows, although, as there is |
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no standard on how to do this under windows, this might work only on |
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cygwin or specific versions of msvc. Your problem. |
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|
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For most systems, the default chosen should be OK. If you experience |
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problems then you should experiment with this setting and/or turn off |
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optimizations (make OPTIMIZE=-O0). |
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|
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EOF |
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|
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retry: |
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|
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my $r = prompt "Use which implementation,\n" . |
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"<s>etjmp/longjump, <u>context, <i>rix, <l>inux or <w>indows?", |
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$iface; |
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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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$DEFINE .= " -DCORO_IRIX"; |
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print "\nUsing irix-specific implementation\n\n"; |
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} elsif ($iface eq "w") { |
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$DEFINE .= " -DCORO_LOSER"; |
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print "\nUsing windows-specific implementation\n\n"; |
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} else { |
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print "\nUnknown implementation \"$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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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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Per-context stack size factor: Depending on your settings, Coro tries to |
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share the C stack as much as possible, but sometimes it needs to allocate |
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a new one. This setting controls the maximum size that gets allocated, |
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and should not be set too high, as memory and address space still is |
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wasted even if it's not fully used. The value entered will be multiplied |
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by sizeof(long), which is usually 4 on 32-bit systems, and 8 on 64-bit |
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systems. |
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|
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A setting of 16384 (the default) therefore corresponds to a 64k..128k |
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stack, which usually is ample space (you might even want to try 8192 or |
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lower if your program creates many coroutines). |
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|
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Some perls (mostly threaded ones and perl compiled under linux 2.6) and |
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some programs (inefficient regexes can use a lot of stack space) may |
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need much, much more: If Coro segfaults with weird backtraces (e.g. in a |
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function prologue) or in t/10_bugs.t, you might want to increase this to |
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65536 or more. |
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|
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EOF |
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|
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my $stacksize = prompt ("C stack size factor", "16384"); |
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$DEFINE .= " -DSTACKSIZE=$stacksize"; |
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|
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print "using a stacksize of $stacksize * sizeof(long)\n"; |
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|
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print <<EOF; |
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|
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*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** |
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|
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EOF |
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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 /,/, $res; |
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|
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print "\n\n*****************************************************************************\n"; |
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print "If the testsuite fails PLEASE provide the following information\n"; |
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print "to Marc Lehmann <schmorp\@schmorp.de>: operating system name, version,\n"; |
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print "architecture name and this string '$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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|
