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Class core.sync.barrier.Barrier

This class represents a barrier across which threads may only travel in groups of a specific size.

class Barrier ;


this (limit) Initializes a barrier object which releases threads in groups of limit in size.


wait () Wait for the pre-determined number of threads and then proceed.
factory (classname) Create instance of class specified by the fully qualified name classname. The class must either have no constructors or have a default constructor.
opCmp (o) Compare with another Object obj.
opEquals (o) Test whether this is equal to o. The default implementation only compares by identity (using the is operator). Generally, overrides and overloads for opEquals should attempt to compare objects by their contents. A class will most likely want to add an overload that takes your specific type as the argument and does the content comparison. Then you can override this and forward it to your specific typed overload with a cast. Remember to check for null on the typed overload.
toHash () Compute hash function for Object.
toString () Convert Object to a human readable string.


import core.thread;

int  numThreads = 10;
auto barrier    = new Barrier( numThreads );
auto synInfo    = new Object;
int  numReady   = 0;
int  numPassed  = 0;

void threadFn()
    synchronized( synInfo )
    synchronized( synInfo )

auto group = new ThreadGroup;

for ( int i = 0; i < numThreads; ++i )
    group.create( &threadFn );
assert( numReady == numThreads && numPassed == numThreads );


Sean Kelly


Boost License 1.0