add thread/test/Thread_bench.cc

fix factory race condition

reproduce factory race condition

Fix race condition in Factory example.

reproduce race condition of Factory.cc

fix compile error (#13) by lightningkay

libboost1.62 g++6

Update CopyOnWrite_test.cc

Add Waiter test.

detach thread in Thread::dtor() to prevent leaking.

add puzzle/

pass by r-value reference

add signal slot

add trivial signal slot

fix for g++ 4.7

add thread/test/Customer.cc

add WeakCallback

constantness

add sample code

add sample code

add more examples in recipes/thread/test

test atexit().

add two deadlock examples.

rename BoundedBlockingQueue::get() to take().

add BoundedBlockingQueue.

Add example of dead lock caused by global object

sync with muduo/base.

atfork() for resetting t_cachedTid

add AtomicInt32 unittest

muduo thread library