src/java.base/share/classes/java/nio/Bits.java

rev 51055 : 8207235: ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class) throws NPE
Reviewed-by: alanb

*** 205,223 ****
          long reservedMem = RESERVED_MEMORY.addAndGet(-size);
          long totalCap = TOTAL_CAPACITY.addAndGet(-cap);
          assert cnt >= 0 && reservedMem >= 0 && totalCap >= 0;
      }
  
!     // -- Monitoring of direct buffer usage --
! 
!     static {
!         // setup access to this package in SharedSecrets
!         SharedSecrets.setJavaNioAccess(
!             new JavaNioAccess() {
!                 @Override
!                 public JavaNioAccess.BufferPool getDirectBufferPool() {
!                     return new JavaNioAccess.BufferPool() {
                          @Override
                          public String getName() {
                              return "direct";
                          }
                          @Override
--- 205,215 ----
          long reservedMem = RESERVED_MEMORY.addAndGet(-size);
          long totalCap = TOTAL_CAPACITY.addAndGet(-cap);
          assert cnt >= 0 && reservedMem >= 0 && totalCap >= 0;
      }
  
!     static final JavaNioAccess.BufferPool BUFFER_POOL = new JavaNioAccess.BufferPool() {
          @Override
          public String getName() {
              return "direct";
          }
          @Override
*** 231,251 ****
                          @Override
                          public long getMemoryUsed() {
                              return Bits.RESERVED_MEMORY.get();
                          }
                      };
-                 }
-                 @Override
-                 public ByteBuffer newDirectByteBuffer(long addr, int cap, Object ob) {
-                     return new DirectByteBuffer(addr, cap, ob);
-                 }
-                 @Override
-                 public void truncate(Buffer buf) {
-                     buf.truncate();
-                 }
-         });
-     }
  
      // These numbers represent the point at which we have empirically
      // determined that the average cost of a JNI call exceeds the expense
      // of an element by element copy.  These numbers may change over time.
      static final int JNI_COPY_TO_ARRAY_THRESHOLD   = 6;
--- 223,232 ----