bool try_based_timed_lock(MutexType &m, const boost::posix_time::ptime &abs_time)
{
//Same as lock()
if(abs_time == boost::posix_time::pos_infin){
m.lock();
return true;
}
//Always try to lock to achieve POSIX guarantees:
// "Under no circumstance shall the function fail with a timeout if the mutex
// can be locked immediately. The validity of the abs_timeout parameter need not
// be checked if the mutex can be locked immediately."
else if(m.try_lock()){
return true;
}
else{
spin_wait swait;
while(microsec_clock::universal_time() < abs_time){
if(m.try_lock()){
return true;
}
swait.yield();
}
return false;
}
}
void try_based_lock(MutexType &m)
{
if(!m.try_lock()){
spin_wait swait;
do{
if(m.try_lock()){
break;
}
else{
swait.yield();
}
}
while(1);
}
}
