• mclysenk (4/4) Dec 03 2004 What sort of synchronization mechanisms does D provide for multiple thre...
• Ben Hinkle (10/17) Dec 04 2004 The D language has basic critical section support using the "synchronize...
• Sean Kelly (6/24) Dec 04 2004 Note that "synchronized" just indicates that the compiler should not opt...
• Ben Hinkle (1/8) Dec 04 2004
• Sean Kelly (4/7) Dec 05 2004 Oops. Yes I did. That's what I get for posting before having my mornin...

mclysenk <mclysenk_member pathlink.com> writes:

What sort of synchronization mechanisms does D provide for multiple threads?  Is
there any standard implementation of structures like locks / memory barriers?
Java has the methods wait() and notify() built in each object, and C/C++ has
many libraries which can get the job done.  What is there in D/Phobos?

"Ben Hinkle" <ben.hinkle gmail.com> writes:

"mclysenk" <mclysenk_member pathlink.com> wrote in message 
news:cordtd$fbo$1 digitaldaemon.com...
 What sort of synchronization mechanisms does D provide for multiple 
 threads?  Is
 there any standard implementation of structures like locks / memory 
 barriers?
 Java has the methods wait() and notify() built in each object, and C/C++ 
 has
 many libraries which can get the job done.  What is there in D/Phobos?

The D language has basic critical section support using the "synchronized" 
statement or attribute. It doesn't have wait/notify or other types of locks. 
The "volatile" statement is for memory barriers.
A port of the Java 1.5 concurrency classes is available at 
http://home.comcast.net/~benhinkle/mintl/locks.html
It has a reentrant lock with condition variables, countdown, cyclic-barrier, 
exchanger, semaphore and a read-write lock.

-Ben 

Sean Kelly <sean f4.ca> writes:

In article <cot4e8$2s7u$1 digitaldaemon.com>, Ben Hinkle says...
"mclysenk" <mclysenk_member pathlink.com> wrote in message 
news:cordtd$fbo$1 digitaldaemon.com...
 What sort of synchronization mechanisms does D provide for multiple 
 threads?  Is
 there any standard implementation of structures like locks / memory 
 barriers?
 Java has the methods wait() and notify() built in each object, and C/C++ 
 has
 many libraries which can get the job done.  What is there in D/Phobos?

The D language has basic critical section support using the "synchronized" 
statement or attribute. It doesn't have wait/notify or other types of locks. 
The "volatile" statement is for memory barriers.
A port of the Java 1.5 concurrency classes is available at 
http://home.comcast.net/~benhinkle/mintl/locks.html
It has a reentrant lock with condition variables, countdown, cyclic-barrier, 
exchanger, semaphore and a read-write lock.

Note that "synchronized" just indicates that the compiler should not optimize
past those barriers.  AFAIK there are currently no hardware-level barrier
instructions in place, so lockless synchronization methods make a handy
supplement.


Sean

"Ben Hinkle" <ben.hinkle gmail.com> writes:

 Note that "synchronized" just indicates that the compiler should not 
 optimize

I think you meant "volatile" instead of "synchronized", yes?

 past those barriers.  AFAIK there are currently no hardware-level barrier
 instructions in place, so lockless synchronization methods make a handy
 supplement.


 Sean

 

Sean Kelly <sean f4.ca> writes:

In article <cotr0v$m1l$1 digitaldaemon.com>, Ben Hinkle says...
 Note that "synchronized" just indicates that the compiler should not 
 optimize

I think you meant "volatile" instead of "synchronized", yes?

Oops.  Yes I did.  That's what I get for posting before having my morning
coffee.


Sean