TA貢獻1830條經驗 獲得超3個贊
boost::shared_mutex _access;void reader(){
// get shared access
boost::shared_lock<boost::shared_mutex> lock(_access);
// now we have shared access}void writer(){
// get upgradable access
boost::upgrade_lock<boost::shared_mutex> lock(_access);
// get exclusive access
boost::upgrade_to_unique_lock<boost::shared_mutex> uniqueLock(lock);
// now we have exclusive access}
TA貢獻1872條經驗 獲得超4個贊
boost::shared_mutex _access;void reader(){
boost::shared_lock< boost::shared_mutex > lock(_access);
// do work here, without anyone having exclusive access}void conditional_writer(){
boost::upgrade_lock< boost::shared_mutex > lock(_access);
// do work here, without anyone having exclusive access
if (something) {
boost::upgrade_to_unique_lock< boost::shared_mutex > uniqueLock(lock);
// do work here, but now you have exclusive access
}
// do more work here, without anyone having exclusive access}void unconditional_writer(){
boost::unique_lock< boost::shared_mutex > lock(_access);
// do work here, with exclusive access}
TA貢獻1796條經驗 獲得超10個贊
#include <boost/thread/locks.hpp>#include <boost/thread/shared_mutex.hpp>typedef boost::shared_mutex Lock;typedef boost:
:unique_lock< Lock > WriteLock;typedef boost::shared_lock< Lock > ReadLock;Lock myLock;void ReadFunction(){
ReadLock r_lock(myLock);
//Do reader stuff}void WriteFunction(){
WriteLock w_lock(myLock);
//Do writer stuff}舉報