Hi all, As suggested by Roland Bock on the Boost Users ML, I have implemented the thread_clock on Windows using FILETIME creationTime, exitTime, kernelTime, userTime; GetThreadTimes(GetCurrentThread (), &creationTime, &exitTime, &kernelTime,&userTime); I don't know Windows well, it would be very kind if someone of you can inspect the implementation. The implementation of thread_clock for Mac is still missing. I don't know even if thread cloks are provided on this platform. In addition, I have added also the function prototypes to Boost.Thread using Boost.Chrono as well as updated the tests. This could be used as a base for a possible Boost.Thread update using chrono (standard C++0x proposal), if the library is accepted, of course. Note the modifications of Boost.Thread have been done on the base of 1.43. The library can be downloaded from http://www.boostpro.com/vault/index.php?action=downloadfile&filename=chrono.zip&directory=System& and the documentation is online on the sandbox http://svn.boost.org/svn/boost/sandbox/chrono/libs/chrono/doc/html/index.htm.... Anthony Williams has accepted to manage the review. We have not yet fixed a date, but I expect we could communicate one soon. I will be very thankful, if people using the library already or that could be interested in, can do a review even before the date. Thanks, _____________________ Vicente Juan Botet Escribá http://viboes.blogspot.com/