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Diffstat (limited to 'src/java/com/jogamp/common/util/RecursiveToolkitLock.java')
-rw-r--r--src/java/com/jogamp/common/util/RecursiveToolkitLock.java215
1 files changed, 0 insertions, 215 deletions
diff --git a/src/java/com/jogamp/common/util/RecursiveToolkitLock.java b/src/java/com/jogamp/common/util/RecursiveToolkitLock.java
deleted file mode 100644
index e02ff94..0000000
--- a/src/java/com/jogamp/common/util/RecursiveToolkitLock.java
+++ /dev/null
@@ -1,215 +0,0 @@
-/**
- * Copyright 2010 JogAmp Community. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification, are
- * permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice, this list of
- * conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright notice, this list
- * of conditions and the following disclaimer in the documentation and/or other materials
- * provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * The views and conclusions contained in the software and documentation are those of the
- * authors and should not be interpreted as representing official policies, either expressed
- * or implied, of JogAmp Community.
- */
-
-package com.jogamp.common.util;
-
-import com.jogamp.common.impl.Debug;
-
-import java.util.LinkedList;
-
-/**
- * Reentrance locking toolkit, impl a complete fair FIFO scheduler
- */
-public class RecursiveToolkitLock {
- static class SyncData {
- // owner of the lock
- Thread owner = null;
- // lock recursion
- int recursionCount = 0;
- // stack trace of the lock
- Exception lockedStack = null;
- // waiting thread queue
- LinkedList threadQueue = new LinkedList();
- // flag signaling unlock has woken up a waiting thread
- boolean signaled = false;
- }
- private SyncData sdata = new SyncData(); // synchronized (flow/mem) mutable access
-
- private long timeout;
- private static final long defaultTimeout = 5000; // default maximum wait 5s
- // private static final long defaultTimeout = 300000; // default maximum wait 300s / 5min
- private static final boolean TRACE_LOCK = Debug.debug("TraceLock");
-
- public RecursiveToolkitLock() {
- this.timeout = defaultTimeout;
- }
-
- public RecursiveToolkitLock(long timeout) {
- this.timeout = timeout;
- }
-
- public final Exception getLockedStack() {
- synchronized(sdata) {
- return sdata.lockedStack;
- }
- }
-
- public final Thread getOwner() {
- synchronized(sdata) {
- return sdata.owner;
- }
- }
-
- public final boolean isOwner() {
- return isOwner(Thread.currentThread());
- }
-
- public final boolean isOwner(Thread thread) {
- synchronized(sdata) {
- return sdata.owner == thread ;
- }
- }
-
- public final boolean isLocked() {
- synchronized(sdata) {
- return null != sdata.owner;
- }
- }
-
- public final boolean isLockedByOtherThread() {
- synchronized(sdata) {
- return null != sdata.owner && Thread.currentThread() != sdata.owner ;
- }
- }
-
- public final int getRecursionCount() {
- synchronized(sdata) {
- return sdata.recursionCount;
- }
- }
-
- public final void validateLocked() {
- synchronized(sdata) {
- if ( null == sdata.owner ) {
- throw new RuntimeException(Thread.currentThread()+": Not locked");
- }
- if ( Thread.currentThread() != sdata.owner ) {
- getLockedStack().printStackTrace();
- throw new RuntimeException(Thread.currentThread()+": Not owner, owner is "+sdata.owner);
- }
- }
- }
-
- /** Recursive and blocking lockSurface() implementation */
- public final void lock() {
- synchronized(sdata) {
- Thread cur = Thread.currentThread();
- if (sdata.owner == cur) {
- ++sdata.recursionCount;
- if(TRACE_LOCK) {
- System.err.println("+++ LOCK 2 ["+this+"], recursions "+sdata.recursionCount+", "+cur);
- }
- return;
- }
-
- if (sdata.owner != null || sdata.signaled || sdata.threadQueue.size() > 0) {
- // enqueue due to locked resource or already waiting or signaled threads (be fair)
- boolean timedOut = false;
- do {
- sdata.threadQueue.addFirst(cur); // should only happen once
- try {
- sdata.wait(timeout);
- timedOut = sdata.threadQueue.remove(cur); // timeout if not already removed by unlock
- } catch (InterruptedException e) {
- if(!sdata.signaled) {
- // theoretically we could stay in the loop,
- // in case the interrupt wasn't issued by unlock,
- // hence the re-enqueue
- sdata.threadQueue.remove(cur);
- if(TRACE_LOCK) {
- System.err.println("XXX LOCK - ["+this+"], recursions "+sdata.recursionCount+", "+cur);
- }
- }
- }
- } while (null != sdata.owner && !timedOut) ;
-
- sdata.signaled = false;
-
- if(timedOut || null != sdata.owner) {
- sdata.lockedStack.printStackTrace();
- throw new RuntimeException("Waited "+timeout+"ms for: "+sdata.owner+" - "+cur+", with recursionCount "+sdata.recursionCount+", lock: "+this+", qsz "+sdata.threadQueue.size());
- }
-
- if(TRACE_LOCK) {
- System.err.println("+++ LOCK 3 ["+this+"], recursions "+sdata.recursionCount+", qsz "+sdata.threadQueue.size()+", "+cur);
- }
- } else if(TRACE_LOCK) {
- System.err.println("+++ LOCK 1 ["+this+"], recursions "+sdata.recursionCount+", qsz "+sdata.threadQueue.size()+", "+cur);
- }
-
- sdata.owner = cur;
- sdata.lockedStack = new Exception("Previously locked by "+sdata.owner+", lock: "+this);
- }
- }
-
-
- /** Recursive and unblocking unlockSurface() implementation */
- public final void unlock() {
- unlock(null);
- }
-
- /** Recursive and unblocking unlockSurface() implementation */
- public final void unlock(Runnable taskAfterUnlockBeforeNotify) {
- synchronized(sdata) {
- validateLocked();
-
- if (sdata.recursionCount > 0) {
- --sdata.recursionCount;
- if(TRACE_LOCK) {
- System.err.println("--- LOCK 1 ["+this+"], recursions "+sdata.recursionCount+", "+Thread.currentThread());
- }
- return;
- }
- sdata.owner = null;
- sdata.lockedStack = null;
- if(null!=taskAfterUnlockBeforeNotify) {
- taskAfterUnlockBeforeNotify.run();
- }
-
- int qsz = sdata.threadQueue.size();
- if(qsz > 0) {
- Thread parkedThread = (Thread) sdata.threadQueue.removeLast();
- if(TRACE_LOCK) {
- System.err.println("--- LOCK X ["+this+"], recursions "+sdata.recursionCount+
- ", "+Thread.currentThread()+", irq "+(qsz-1)+": "+parkedThread);
- }
- sdata.signaled = true;
- if(qsz==1) {
- // fast path, just one waiting thread
- sdata.notify();
- } else {
- // signal the oldest one ..
- parkedThread.interrupt(); // Propagate SecurityException if it happens
- }
- } else if(TRACE_LOCK) {
- System.err.println("--- LOCK X ["+this+"], recursions "+sdata.recursionCount+", "+Thread.currentThread());
- }
- }
- }
-}
-
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