Ali Çehreli via Digitalmars-d-learn digitalmars-d-learn at puremagic.com
Mon Apr 28 14:09:24 PDT 2014

On 04/28/2014 01:16 PM, xtimoner wrote:

 > synchronized class EventLog{
 >      void opCall(string s){
 >          std.file.append("logfile.txt", s);
 >      }
 > }
 > shared EventLog eventLog;
 > Pleas, is it multithread safe and prefered way?

Only if there is only one EventLog object. A synchronized class means 
that there can be only one member function executed on the same object 
at a given time. Your code is the equivalent of the following:

class EventLog{
     void opCall(string s){
         synchronized (this) {    // <-- NOTE (this)
             std.file.append("logfile.txt", s);

So, opCall (and other member functions) is synchronized on a particular 

If you have more than one EventLog, then they can write to the same file 
at the same time and that would be a problem.


More information about the Digitalmars-d-learn mailing list