<commit_before>package com4j;

import java.lang.ref.ReferenceQueue;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;


/**
 * Thread managed by com4j.
 *
 * <p>
 * For each user thread that works with COM objects,
 * one {@link ComThread} is created to manage those objects.
 *
 * @author <NAME> (<EMAIL>)<commit_msg>doc improvement<commit_after>package com4j;

import java.lang.ref.ReferenceQueue;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;


/**
 * Thread managed by com4j.
 *
 * <p>
 * For each user thread that works with COM objects,
 * one {@link ComThread} is created to manage those objects.
 *
 * <p>
 * This is because COM objects are inherently tied to the thread that created it,
 * and therefore all the invocations must be routed through the creator thread.
 * See http://msdn.microsoft.com/en-us/library/ms809971.aspx for more discussions.
 *
 * <p>
 * This model is rather alien to Java developers, where objects can be passed between
 * threads more freely. (This is a separate issue from whether those objects can be
 * safely accessed concurrently.)
 *
 * <p>
 * To bridge these gaps, we don't let application threads touch COM objects at all,
 * and instead create {@link ComThread} as a shadow thread for each application thread who wants to
 * create a COM object.
 *
 * @author <NAME> (<EMAIL>)
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