Am Monday 30 November 2009 01:21:42 schrieb Vicente Botet Escriba:
For the mutexes is another history. Have you tried to make a mutex class that works for process, threads and fibers? If you did, I'm interested in seen how you have reached that.
no I have not, but if you look at... https://svn.boost.org/svn/boost/sandbox/fiber/libs/fiber/src/mutex.cpp ...Oliver almost has. slightly changed to: namespace sync{ template<class Suspend> struct basic_cas_mutex{ void lock(){ while(true){ uint32_t expected = 0; if ( detail::atomic_compare_exchange_strong( & state_, & expected, 1) ) break; else Suspend()(); } } ... ... }; namespace fiber{ struct suspend{ void operator()() const{ this_fiber::yield(); } }; typedef sync::basic_cas_mutex<suspend> mutex; } namespace thread{ struct suspend{ void operator()() const{ this_thread::yield(); } }; #if CAS supported on platform typedef sync::basic_cas_mutex<suspend> mutex; #else typedef sync::native_mutex mutex; #endif } ...and if you have multiple CPUs and shortlived locks only, you might choose to not yield at all, to avoid a system call: struct null_suspend{ void operator()() const{} }; typedef sync::basic_cas_mutex<null_suspend> spin_mutex;