Add tests to repository

tests/cpp/nsThread.h

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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla code.
+ *
+ * The Initial Developer of the Original Code is Google Inc.
+ * Portions created by the Initial Developer are Copyright (C) 2006
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *  Darin Fisher <darin@meer.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef nsThread_h__
+#define nsThread_h__
+
+#include "nsIThreadInternal.h"
+#include "nsISupportsPriority.h"
+#include "nsEventQueue.h"
+#include "nsThreadUtils.h"
+#include "nsString.h"
+#include "nsAutoLock.h"
+#include "nsAutoPtr.h"
+
+// A native thread
+class nsThread : public nsIThreadInternal, public nsISupportsPriority
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIEVENTTARGET
+  NS_DECL_NSITHREAD
+  NS_DECL_NSITHREADINTERNAL
+  NS_DECL_NSISUPPORTSPRIORITY
+
+  nsThread();
+
+  // Initialize this as a wrapper for a new PRThread.
+  nsresult Init();
+
+  // Initialize this as a wrapper for the current PRThread.
+  nsresult InitCurrentThread();
+
+  // The PRThread corresponding to this thread.
+  PRThread *GetPRThread() { return mThread; }
+
+  // If this flag is true, then the nsThread was created using
+  // nsIThreadManager::NewThread.
+  PRBool ShutdownRequired() { return mShutdownRequired; }
+
+  // The global thread observer
+  static nsIThreadObserver* sGlobalObserver;
+
+private:
+  friend class nsThreadShutdownEvent;
+
+  ~nsThread();
+
+  PRBool ShuttingDown() { return mShutdownContext != nsnull; }
+
+  static void ThreadFunc(void *arg);
+
+  // Helper
+  already_AddRefed<nsIThreadObserver> GetObserver() {
+    nsIThreadObserver *obs;
+    nsThread::GetObserver(&obs);
+    return already_AddRefed<nsIThreadObserver>(obs);
+  }
+
+  // Wrappers for event queue methods:
+  PRBool GetEvent(PRBool mayWait, nsIRunnable **event) {
+    return mEvents->GetEvent(mayWait, event);
+  }
+  nsresult PutEvent(nsIRunnable *event);
+
+  // Wrapper for nsEventQueue that supports chaining.
+  class nsChainedEventQueue {
+  public:
+    nsChainedEventQueue(nsIThreadEventFilter *filter = nsnull)
+      : mNext(nsnull), mFilter(filter) {
+    }
+
+    PRBool IsInitialized() {
+      return mQueue.IsInitialized();
+    }
+
+    PRBool GetEvent(PRBool mayWait, nsIRunnable **event) {
+      return mQueue.GetEvent(mayWait, event);
+    }
+
+    PRBool PutEvent(nsIRunnable *event);
+    
+    PRBool HasPendingEvent() {
+      return mQueue.HasPendingEvent();
+    }
+
+    class nsChainedEventQueue *mNext;
+  private:
+    nsCOMPtr<nsIThreadEventFilter> mFilter;
+    nsEventQueue mQueue;
+  };
+
+  // This lock protects access to mObserver, mEvents and mEventsAreDoomed.
+  // All of those fields are only modified on the thread itself (never from
+  // another thread).  This means that we can avoid holding the lock while
+  // using mObserver and mEvents on the thread itself.  When calling PutEvent
+  // on mEvents, we have to hold the lock to synchronize with PopEventQueue.
+  PRLock *mLock;
+
+  nsCOMPtr<nsIThreadObserver> mObserver;
+
+  nsChainedEventQueue *mEvents;   // never null
+  nsChainedEventQueue  mEventsRoot;
+
+  PRInt32   mPriority;
+  PRThread *mThread;
+  PRUint32  mRunningEvent;  // counter
+
+  struct nsThreadShutdownContext *mShutdownContext;
+
+  PRPackedBool mShutdownRequired;
+  PRPackedBool mShutdownPending;
+  // Set to true when events posted to this thread will never run.
+  PRPackedBool mEventsAreDoomed;
+};
+
+//-----------------------------------------------------------------------------
+
+class nsThreadSyncDispatch : public nsRunnable {
+public:
+  nsThreadSyncDispatch(nsIThread *origin, nsIRunnable *task)
+    : mOrigin(origin), mSyncTask(task) {
+  }
+
+  PRBool IsPending() {
+    return mSyncTask != nsnull;
+  }
+
+private:
+  NS_DECL_NSIRUNNABLE
+
+  nsCOMPtr<nsIThread> mOrigin;
+  nsCOMPtr<nsIRunnable> mSyncTask;
+};
+
+#endif  // nsThread_h__