112 value = newValue; 113 } 114 115 /** 116 * Eventually sets to the given value. 117 * 118 * @param newValue the new value 119 * @since 1.6 120 */ 121 public final void lazySet(long newValue) { 122 unsafe.putOrderedLong(this, valueOffset, newValue); 123 } 124 125 /** 126 * Atomically sets to the given value and returns the old value. 127 * 128 * @param newValue the new value 129 * @return the previous value 130 */ 131 public final long getAndSet(long newValue) { 132 while (true) { 133 long current = get(); 134 if (compareAndSet(current, newValue)) 135 return current; 136 } 137 } 138 139 /** 140 * Atomically sets the value to the given updated value 141 * if the current value {@code ==} the expected value. 142 * 143 * @param expect the expected value 144 * @param update the new value 145 * @return true if successful. False return indicates that 146 * the actual value was not equal to the expected value. 147 */ 148 public final boolean compareAndSet(long expect, long update) { 149 return unsafe.compareAndSwapLong(this, valueOffset, expect, update); 150 } 151 152 /** 153 * Atomically sets the value to the given updated value 154 * if the current value {@code ==} the expected value. 155 * 156 * <p>May <a href="package-summary.html#Spurious">fail spuriously</a> 157 * and does not provide ordering guarantees, so is only rarely an 158 * appropriate alternative to {@code compareAndSet}. 159 * 160 * @param expect the expected value 161 * @param update the new value 162 * @return true if successful. 163 */ 164 public final boolean weakCompareAndSet(long expect, long update) { 165 return unsafe.compareAndSwapLong(this, valueOffset, expect, update); 166 } 167 168 /** 169 * Atomically increments by one the current value. 170 * 171 * @return the previous value 172 */ 173 public final long getAndIncrement() { 174 while (true) { 175 long current = get(); 176 long next = current + 1; 177 if (compareAndSet(current, next)) 178 return current; 179 } 180 } 181 182 /** 183 * Atomically decrements by one the current value. 184 * 185 * @return the previous value 186 */ 187 public final long getAndDecrement() { 188 while (true) { 189 long current = get(); 190 long next = current - 1; 191 if (compareAndSet(current, next)) 192 return current; 193 } 194 } 195 196 /** 197 * Atomically adds the given value to the current value. 198 * 199 * @param delta the value to add 200 * @return the previous value 201 */ 202 public final long getAndAdd(long delta) { 203 while (true) { 204 long current = get(); 205 long next = current + delta; 206 if (compareAndSet(current, next)) 207 return current; 208 } 209 } 210 211 /** 212 * Atomically increments by one the current value. 213 * 214 * @return the updated value 215 */ 216 public final long incrementAndGet() { 217 for (;;) { 218 long current = get(); 219 long next = current + 1; 220 if (compareAndSet(current, next)) 221 return next; 222 } 223 } 224 225 /** 226 * Atomically decrements by one the current value. 227 * 228 * @return the updated value 229 */ 230 public final long decrementAndGet() { 231 for (;;) { 232 long current = get(); 233 long next = current - 1; 234 if (compareAndSet(current, next)) 235 return next; 236 } 237 } 238 239 /** 240 * Atomically adds the given value to the current value. 241 * 242 * @param delta the value to add 243 * @return the updated value 244 */ 245 public final long addAndGet(long delta) { 246 for (;;) { 247 long current = get(); 248 long next = current + delta; 249 if (compareAndSet(current, next)) 250 return next; 251 } 252 } 253 254 /** 255 * Returns the String representation of the current value. 256 * @return the String representation of the current value. 257 */ 258 public String toString() { 259 return Long.toString(get()); 260 } 261 262 /** 263 * Returns the value of this {@code AtomicLong} as an {@code int} 264 * after a narrowing primitive conversion. 265 * @jls 5.1.3 Narrowing Primitive Conversions 266 */ 267 public int intValue() { 268 return (int)get(); 269 } 270 271 /** 272 * Returns the value of this {@code AtomicLong} as a {@code long}. 273 */ 274 public long longValue() { 275 return get(); 276 } | 112 value = newValue; 113 } 114 115 /** 116 * Eventually sets to the given value. 117 * 118 * @param newValue the new value 119 * @since 1.6 120 */ 121 public final void lazySet(long newValue) { 122 unsafe.putOrderedLong(this, valueOffset, newValue); 123 } 124 125 /** 126 * Atomically sets to the given value and returns the old value. 127 * 128 * @param newValue the new value 129 * @return the previous value 130 */ 131 public final long getAndSet(long newValue) { 132 return unsafe.getAndSetLong(this, valueOffset, newValue); 133 } 134 135 /** 136 * Atomically sets the value to the given updated value 137 * if the current value {@code ==} the expected value. 138 * 139 * @param expect the expected value 140 * @param update the new value 141 * @return true if successful. False return indicates that 142 * the actual value was not equal to the expected value. 143 */ 144 public final boolean compareAndSet(long expect, long update) { 145 return unsafe.compareAndSwapLong(this, valueOffset, expect, update); 146 } 147 148 /** 149 * Atomically sets the value to the given updated value 150 * if the current value {@code ==} the expected value. 151 * 152 * <p>May <a href="package-summary.html#Spurious">fail spuriously</a> 153 * and does not provide ordering guarantees, so is only rarely an 154 * appropriate alternative to {@code compareAndSet}. 155 * 156 * @param expect the expected value 157 * @param update the new value 158 * @return true if successful 159 */ 160 public final boolean weakCompareAndSet(long expect, long update) { 161 return unsafe.compareAndSwapLong(this, valueOffset, expect, update); 162 } 163 164 /** 165 * Atomically increments by one the current value. 166 * 167 * @return the previous value 168 */ 169 public final long getAndIncrement() { 170 return getAndAdd(1); 171 } 172 173 /** 174 * Atomically decrements by one the current value. 175 * 176 * @return the previous value 177 */ 178 public final long getAndDecrement() { 179 return getAndAdd(-1); 180 } 181 182 /** 183 * Atomically adds the given value to the current value. 184 * 185 * @param delta the value to add 186 * @return the previous value 187 */ 188 public final long getAndAdd(long delta) { 189 return unsafe.getAndAddLong(this, valueOffset, delta); 190 } 191 192 /** 193 * Atomically increments by one the current value. 194 * 195 * @return the updated value 196 */ 197 public final long incrementAndGet() { 198 return getAndAdd(1) + 1; 199 } 200 201 /** 202 * Atomically decrements by one the current value. 203 * 204 * @return the updated value 205 */ 206 public final long decrementAndGet() { 207 return getAndAdd(-1) - 1; 208 } 209 210 /** 211 * Atomically adds the given value to the current value. 212 * 213 * @param delta the value to add 214 * @return the updated value 215 */ 216 public final long addAndGet(long delta) { 217 return getAndAdd(delta) + delta; 218 } 219 220 /** 221 * Returns the String representation of the current value. 222 * @return the String representation of the current value 223 */ 224 public String toString() { 225 return Long.toString(get()); 226 } 227 228 /** 229 * Returns the value of this {@code AtomicLong} as an {@code int} 230 * after a narrowing primitive conversion. 231 * @jls 5.1.3 Narrowing Primitive Conversions 232 */ 233 public int intValue() { 234 return (int)get(); 235 } 236 237 /** 238 * Returns the value of this {@code AtomicLong} as a {@code long}. 239 */ 240 public long longValue() { 241 return get(); 242 } |