On Behalf Of Sean Kelly Subject: [boost] Re: future of boost.threads
Kind of unrelated but I thought I'd ask here as the original author of this thread lib is among the missing. I'd like to create a basic condvar implementation for the (windows version of the) D programming language and obviously don't want to have to invent one from scratch. Is there another good implementation in the public domain or is the boost version it? And if I used the boost implementation as a template, would it be necessary and sufficient for me to include the copyright notice? It would be a total rewrite, but I'd still consider it a derivative work of whatever it was based on.
Sean
Sean, See no reason why you can't use the boost implementation with acknowledgement. The ACE license is pretty close to public domain and it has a condition variable that has been around for many years: <quote> Detailed Description template<class MUTEX> class ACE_Condition< MUTEX > ACE_Condition variable wrapper, which allows threads to block until shared data changes state. A condition variable enables threads to atomically block and test the condition under the protection of a mutual exclu- sion lock (mutex) until the condition is satisfied. That is, the mutex must have been held by the thread before calling wait or signal on the condition. If the condition is false, a thread blocks on a condition variable and atomically releases the mutex that is waiting for the condition to change. If another thread changes the condition, it may wake up waiting threads by signaling the associated condition variable. The waiting threads, upon awakening, reacquire the mutex and re-evaluate the condition. Note, you can only parameterize <ACE_Condition> with ACE_Thread_Mutex, ACE_Recursive_Thread_Mutex, or ACE_Null_Mutex. </quote> It is a good idea to be familiar with ACE if you are approaching this. ACE is an excellent library for concurrency, however its C++ is showing both its age and many compromises to support an amazing number of platforms. ACE categories are here: http://www.cs.wustl.edu/~schmidt/ACE_wrappers/docs/ACE-categories.html ACE home is: http://www.cs.wustl.edu/~schmidt/ACE-documentation.html Regards, Matt Hurd.