# Ruby 1.9, threads and FreeBSD 5 **URL:** \ **Category:** Ruby\ **Created:** [February 20, 2008, 2:36pm UTC](https://www.ruby-forum.com/t/ruby-1-9-threads-and-freebsd-5/129671 "2008-02-20T14:36:01Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![cowboy\_x](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/d78d45/32.png) [@cowboy\_x](https://www.ruby-forum.com/u/cowboy_x)\ **Post date:** [February 20, 2008, 2:36pm UTC](https://www.ruby-forum.com/t/ruby-1-9-threads-and-freebsd-5/129671/1 "2008-02-20T14:36:01Z")
Hi, Considering the following theory code: require “thread” ping = ConditionVariable.new pong = ConditionVariable.new mutex = Mutex.new 1.upto(10) do # 10 threads pong Thread.new do mutex.synchronize do ping.wait(mutex) puts(“Pong…”) pong.signal end end end 1.upto(10) do # 10 threads ping Thread.new do mutex.synchronize do pong.wait(mutex) print(“Ping…”) ping.signal end end end pong.signal # Go! Thread.list.each { |t| t.join if t != Thread.main } This code works as expected with Ruby 1.8 on FreeBSD and OS X : % /usr/bin/ruby ping\_pong\_cond.rb Ping…Pong… Ping…Pong… Ping…Pong… Ping…Pong… Ping…Pong… Ping…Pong… Ping…Pong… Ping…Pong… Ping…Pong… Ping…Pong… But it blocks with Ruby 1.9 on both OS : % ruby ping\_pong\_cond.rb ^Cping\_pong\_cond.rb:30:in `join': Interrupt from ping_pong_cond.rb:30:in`block in ’ from ping\_pong\_cond.rb:30:in `each' from ping_pong_cond.rb:30:in`’ Furthermore, it works fine with Ruby 1.9 on Vista. As i know there is some change in Ruby threads/Native threads between 1.8 and 1.9, i suspect this change could be the culprit… Any clue? Thanks ---
**Author:** ![cowboy\_x](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/d78d45/32.png) [@cowboy\_x](https://www.ruby-forum.com/u/cowboy_x)\ **Post date:** [February 20, 2008, 4:55pm UTC](https://www.ruby-forum.com/t/ruby-1-9-threads-and-freebsd-5/129671/2 "2008-02-20T16:55:52Z")
In article [removed\_email\_address@domain.invalid.i-did-not-set--mail-host-address--so-tickle-me](mailto:removed_email_address@domain.invalid.i-did-not-set--mail-host-address--so-tickle-me), Eric J. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > As i know there is some change in Ruby threads/Native threads between > 1.8 and 1.9, i suspect this change could be the culprit… My memory about 5.x is a bit fuzzy now but can you do an “ldd $(which ruby)” please? Check whether you are using libc\_r or libpthread. If you can I’d suggest moving on 6.3 using libthr (new 1:1 threading library). ---
**Author:** ![cowboy\_x](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/d78d45/32.png) [@cowboy\_x](https://www.ruby-forum.com/u/cowboy_x)\ **Post date:** [February 20, 2008, 6:40pm UTC](https://www.ruby-forum.com/t/ruby-1-9-threads-and-freebsd-5/129671/3 "2008-02-20T18:40:45Z")
Ollivier R. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes: > My memory about 5.x is a bit fuzzy now but can you do an “ldd $(which ruby)” > please? Check whether you are using libc\_r or libpthread. If you can I’d > suggest moving on 6.3 using libthr (new 1:1 threading library). My mistake… My FBSD is a 6.2, not a 5… [mass-cara]:~ % ldd $(which ruby) /usr/local/bin/ruby: libthr.so.2 =\> /usr/lib/libthr.so.2 (0x28173000) libcrypt.so.3 =\> /lib/libcrypt.so.3 (0x28185000) libm.so.4 =\> /lib/libm.so.4 (0x2819d000) libc.so.6 =\> /lib/libc.so.6 (0x281b3000) [mass-cara]:~ % ldd $(which ruby18) /usr/local/bin/ruby18: libruby18.so.18 =\> /usr/local/lib/libruby18.so.18 (0x2807a000) libcrypt.so.3 =\> /lib/libcrypt.so.3 (0x28138000) libm.so.4 =\> /lib/libm.so.4 (0x28150000) libpthread.so.2 =\> /lib/libpthread.so.2 (0x28166000) libc.so.6 =\> /lib/libc.so.6 (0x2818b000) The ruby 1.9 was built from scratch using the classic “configure/make/make install” idiom. The ruby 1.8 is built from FBSD ports.