Examples of EDU.oswego.cs.dl.util.concurrent.Sync.attempt()

Package EDU.oswego.cs.dl.util.concurrent

Class EDU.oswego.cs.dl.util.concurrent.Sync

Examples of EDU.oswego.cs.dl.util.concurrent.Sync.attempt()

EDU.oswego.cs.dl.util.concurrent.Sync.attempt()
Wait at most msecs to pass; report whether passed.
The method has best-effort semantics: The msecs bound cannot be guaranteed to be a precise upper bound on wait time in Java. Implementations generally can only attempt to return as soon as possible after the specified bound. Also, timers in Java do not stop during garbage collection, so timeouts can occur just because a GC intervened. So, msecs arguments should be used in a coarse-grained manner. Further, implementations cannot always guarantee that this method will return at all without blocking indefinitely when used in unintended ways. For example, deadlocks may be encountered when called in an unintended context.
@param msecs the number of milleseconds to wait.An argument less than or equal to zero means not to wait at all. However, this may still require access to a synchronization lock, which can impose unbounded delay if there is a lot of contention among threads. @return true if acquired

               int duration = rand.nextInt((int) SLEEP_MSECS);
               _sleep(SLEEP_MSECS);
               Sync rlock = null;
               try {
                  rlock = lock_.readLock();
                  if (!rlock.attempt(msecs)) {
                     log("Read lock attempt failed.");
//                     fail("Read lock attempt failed.");
                     counter++;
                     continue;
                  }

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               int duration = rand.nextInt((int) SLEEP_MSECS);
               _sleep(SLEEP_MSECS + duration);
               Sync wlock = null;
               try {
                  wlock = lock_.writeLock();
                  if (!wlock.attempt(msecs)) {
                     log("Write lock attempt failed.");
//                     fail("Write lock attempt failed.");
                     counter++;
                     continue;
                  }

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               _sleep(SLEEP_MSECS);
               Sync rlock = null;
               Sync wlock = null;
               try {
                  rlock = lock_.readLock();
                  if (!wlock.attempt(msecs)) {
                     log("Read lock attempt failed.");
//                   fail("Read lock attempt failed.");
                     counter++;
                     continue;
                  }

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      {
         public void run()
         {
               Sync rlock = lock_.readLock();
            try {
               if (! rlock.attempt(msecs)) {
                  logX(caseNum+"-"+name+" requesting read lock failed!\n");
                  String str = caseNum + "-" + name + "-RL-0";
                  postLockingResult(str);
                  return;
               }

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      {
         public void run()
         {
            try {
               Sync wlock = lock_.writeLock();
               if (! wlock.attempt(msecs)) {
                  logX(caseNum+"-"+name+" requesting write lock failed!\n");
                  String str = caseNum + "-" + name + "-WL-0";
                  postLockingResult(str);
                  return;
               }

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   protected void acquireReadLock(final String caseNum, final String name, 
                                  final long msecs, final String errMsg)
   {
            try {
               Sync rlock = lock_.readLock();
               if (! rlock.attempt(msecs)) {
                  logX(caseNum+"-"+name+" requesting read lock failed!\n");
                  String str = caseNum + "-" + name + "-RL-0";
                  postLockingResult(str);
                  return;
               }

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   protected void acquireWriteLock(final String caseNum, final String name, 
                                   final long msecs, final String errMsg)
   {
            try {
               Sync wlock = lock_.writeLock();
               if (! wlock.attempt(msecs)) {
                  logX(caseNum+"-"+name+" requesting write lock failed!\n");
                  String str = caseNum + "-" + name + "-WL-0";
                  postLockingResult(str);
                  return;
               }

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      {
         public void run()
         {
               Sync rlock = lock_.readLock();
            try {
               if (! rlock.attempt(msecs)) {
                  logX(caseNum+"-"+name+" requesting read lock failed!\n");
                  String str = caseNum + "-" + name + "-RL-0";
                  postLockingResult(str);
                  return;
               }

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      {
         public void run()
         {
            try {
               Sync wlock = lock_.writeLock();
               if (! wlock.attempt(msecs)) {
                  logX(caseNum+"-"+name+" requesting write lock failed!\n");
                  String str = caseNum + "-" + name + "-WL-0";
                  postLockingResult(str);
                  return;
               }

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   protected void acquireReadLock(final String caseNum, final String name, 
                                  final long msecs, final String errMsg)
   {
            try {
               Sync rlock = lock_.readLock();
               if (! rlock.attempt(msecs)) {
                  logX(caseNum+"-"+name+" requesting read lock failed!\n");
                  String str = caseNum + "-" + name + "-RL-0";
                  postLockingResult(str);
                  return;
               }

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