[jira] [Created] (IGNITE-638) Implement IgniteSemaphore data structure

["Dmitriy Setrakyan (JIRA)" <ji...@apache.org>]

Dmitriy Setrakyan created IGNITE-638:
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             Summary: Implement IgniteSemaphore data structure
                 Key: IGNITE-638
                 URL: https://issues.apache.org/jira/browse/IGNITE-638
             Project: Ignite
          Issue Type: New Feature
          Components: data structures
            Reporter: Dmitriy Setrakyan


We need to add {{IgniteSemaphore}} data structure in addition to other data structures provided by Ignite. {{IgniteSemaphore}} should have similar API to {{java.util.concurrent.IgniteSemaphore}} class in JDK.

As an example, you can see how [IgniteCountDownLatch|https://github.com/apache/incubator-ignite/blob/master/modules/core/src/main/java/org/apache/ignite/IgniteCountDownLatch.java] is implemented in [GridCacheCountDownLatchImpl|https://github.com/apache/incubator-ignite/blob/master/modules/core/src/main/java/org/apache/ignite/internal/processors/datastructures/GridCacheCountDownLatchImpl.java] class.

In general we need to have an entity in ATOMIC cache storing number of permits and allow user threads to block whenever no more permits are available.



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