Examples of java.util.concurrent.atomic.AtomicLong.compareAndSet()

Class java.util.concurrent.atomic.AtomicLong

Examples of java.util.concurrent.atomic.AtomicLong.compareAndSet()

java.util.concurrent.atomic.AtomicLong.compareAndSet()

            AtomicLong count = counts.get(id);
            if (count != null) {
                while(true) {
                    long expected = count.get();
                    long newValue = expected - c;
                    if (count.compareAndSet(expected, newValue)) {
                        break;
                    }
                }
            }
        } else if (event instanceof MailboxAdded) {

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      long oldseed, nextseed;
      AtomicLong seed = this._seed;
      do {
        oldseed = seed.get();
        nextseed = xorShift(oldseed);
      } while (!seed.compareAndSet(oldseed, nextseed));


      return nextseed;
    }


    @Override

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        long oldseed, nextseed;
        AtomicLong seed = this.seed;
        do {
            oldseed = seed.get();
            nextseed = (oldseed * multiplier + addend) & mask;
        } while (!seed.compareAndSet(oldseed, nextseed));
        return (int)(nextseed >>> (48 - bits));
    }


    /**
     * Generates random bytes and places them into a user-supplied

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          // atomic replaced
          continue outer;
        }


        long newValue = oldValue + delta;
        if (atomic.compareAndSet(oldValue, newValue)) {
          return newValue;
        }
        // value changed
      }
    }

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          // atomic replaced
          continue outer;
        }


        long newValue = oldValue + delta;
        if (atomic.compareAndSet(oldValue, newValue)) {
          return oldValue;
        }
        // value changed
      }
    }

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          }
          // atomic replaced
          continue outer;
        }


        if (atomic.compareAndSet(oldValue, newValue)) {
          return oldValue;
        }
        // value changed
      }
    }

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      return 0L;
    }


    for (;;) {
      long oldValue = atomic.get();
      if (oldValue == 0L || atomic.compareAndSet(oldValue, 0L)) {
        // only remove after setting to zero, to avoid concurrent updates
        map.remove(key, atomic);
        // succeed even if the remove fails, since the value was already adjusted
        return oldValue;
      }

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  boolean replace(K key, long expectedOldValue, long newValue) {
    if (expectedOldValue == 0L) {
      return putIfAbsent(key, newValue) == 0L;
    } else {
      AtomicLong atomic = map.get(key);
      return (atomic == null) ? false : atomic.compareAndSet(expectedOldValue, newValue);
    }
  }


  /**
   * If {@code (key, value)} is currently in the map, this method removes it and returns

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    long oldValue = atomic.get();
    if (oldValue != value) {
      return false;
    }


    if (oldValue == 0L || atomic.compareAndSet(oldValue, 0L)) {
      // only remove after setting to zero, to avoid concurrent updates
      map.remove(key, atomic);
      // succeed even if the remove fails, since the value was already adjusted
      return true;
    }

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          // atomic replaced
          continue outer;
        }


        long newValue = oldValue + delta;
        if (atomic.compareAndSet(oldValue, newValue)) {
          return newValue;
        }
        // value changed
      }
    }

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