2020 
2021 
2022     // The following three initially uninitialized fields are exclusively
2023     // managed by class java.util.concurrent.ThreadLocalRandom. These
2024     // fields are used to build the high-performance PRNGs in the
2025     // concurrent code, and we can not risk accidental false sharing.
2026     // Hence, the fields are isolated with @Contended.
2027 
2028     /** The current seed for a ThreadLocalRandom */
2029     @sun.misc.Contended("tlr")
2030     long threadLocalRandomSeed;
2031 
2032     /** Probe hash value; nonzero if threadLocalRandomSeed initialized */
2033     @sun.misc.Contended("tlr")
2034     int threadLocalRandomProbe;
2035 
2036     /** Secondary seed isolated from public ThreadLocalRandom sequence */
2037     @sun.misc.Contended("tlr")
2038     int threadLocalRandomSecondarySeed;
2039 




2040     /* Some private helper methods */
2041     private native void setPriority0(int newPriority);
2042     private native void stop0(Object o);
2043     private native void suspend0();
2044     private native void resume0();
2045     private native void interrupt0();
2046     private native void setNativeName(String name);
2047 }

2020 
2021 
2022     // The following three initially uninitialized fields are exclusively
2023     // managed by class java.util.concurrent.ThreadLocalRandom. These
2024     // fields are used to build the high-performance PRNGs in the
2025     // concurrent code, and we can not risk accidental false sharing.
2026     // Hence, the fields are isolated with @Contended.
2027 
2028     /** The current seed for a ThreadLocalRandom */
2029     @sun.misc.Contended("tlr")
2030     long threadLocalRandomSeed;
2031 
2032     /** Probe hash value; nonzero if threadLocalRandomSeed initialized */
2033     @sun.misc.Contended("tlr")
2034     int threadLocalRandomProbe;
2035 
2036     /** Secondary seed isolated from public ThreadLocalRandom sequence */
2037     @sun.misc.Contended("tlr")
2038     int threadLocalRandomSecondarySeed;
2039 
2040     private static long parkLastGlobalSeqOffset;
2041     private static long parkPriorityOffset;
2042     private static long nestingLevelOffset;
2043 
2044     /* Some private helper methods */
2045     private native void setPriority0(int newPriority);
2046     private native void stop0(Object o);
2047     private native void suspend0();
2048     private native void resume0();
2049     private native void interrupt0();
2050     private native void setNativeName(String name);
2051 }