c++ - boost asio asynchronously waiting on a condition variable -

is possible perform asynchronous wait (read : non-blocking) on conditional variable in boost::asio ? if isn't directly supported hints on implementing appreciated.

i implement timer , fire wakeup every few ms, approach vastly inferior, find hard believe condition variable synchronization not implemented / documented.

if understand intent correctly, want launch event handler, when condition variable signaled, in context of asio thread pool? think sufficient wait on condition variable in beginning of handler, , io_service::post() in pool in end, of sort:

#include <iostream> #include <boost/asio.hpp> #include <boost/thread.hpp> boost::asio::io_service io; boost::mutex mx; boost::condition_variable cv; void handler() {     boost::unique_lock<boost::mutex> lk(mx);          cv.wait(lk);     std::cout << "handler awakened\n";     io.post(handler); } void buzzer() {     for(;;)     {         boost::this_thread::sleep(boost::posix_time::seconds(1));         boost::lock_guard<boost::mutex> lk(mx);             cv.notify_all();     } } int main() {     io.post(handler);     boost::thread bt(buzzer);     io.run(); }