AMDG Ovanes Markarian wrote:
Did you test it? In my case wait returns when the predicate is false. I use an empty circular buffer and call from the same thread this code:
using namespace boost;
scoped_lock lock(mutex_); wait_for_free_slots_.wait(lock, bind(&buffer_type::full, buffer_)); //wait_for_free_slots_ is a condition variable
buffer_.push_back(item); wait_for_items_.notify_all();
This line returns immediately wait_for_free_slots_.wait(lock, bind(&buffer_type::full, buffer_)); //wait_for_free_slots_ is a condition variable
If you inverse the predicate it blocks forever.
Seems to work for me #include <boost/thread/condition_variable.hpp> #include <boost/thread/mutex.hpp> #include <boost/thread/thread.hpp> #include <boost/lambda/lambda.hpp> #include <boost/date_time/posix_time/posix_time_duration.hpp> boost::mutex m; boost::condition_variable c; bool value = false; void set() { boost::unique_lock<boost::mutex> l(m); value = true; c.notify_one(); } void wait() { boost::unique_lock<boost::mutex> l(m); c.wait(l, boost::lambda::var(value)); } int main() { boost::thread(wait); boost::this_thread::sleep(boost::posix_time::seconds(1)); set(); } Look at the definition of wait: template<typename predicate_type> void wait(unique_lock<mutex>& m,predicate_type pred) { while(!pred()) wait(m); } In Christ, Steven Watanabe