and ConditionalVariables to thread_tools.c. In other wowrds,
such classes are built-in.
[Feature #8919]
At first, I planned to embed only a Queue class.
However, rubygems requires 'thread.rb' (rubygems are
required at first, when launch MRI without --disable-gems).
So most of people require 'thread.rb' as an embedded library.
Now, ext/thread/thread.c is empty, only for a dummy for
compatibility.
* thread.c: move a definition of Mutex class to thread_tools.c.
And define Mutex class under Thread (so now Mutex is Thread::Mutex).
Because other thread related classes are also defined under Thread.
We remain ::Mutex as Thread::Mutex. Only an inspect result is changed.
* common.mk: add dependency from thread.o to thraed_tools.c.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51660 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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