Package org.apache.tomcat.jni

Class Global

java.lang.Object
org.apache.tomcat.jni.Global
@Deprecated public class Global extends Object
Deprecated.
The scope of the APR/Native Library will be reduced in Tomcat 10.1.x / Tomcat Native 2.x onwards to only include those components required to provide OpenSSL integration with the NIO and NIO2 connectors.
Global
Author:
Mladen Turk

  • Constructor Summary

    Constructors
    Constructor
    Description
    Global()
    Deprecated.
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static long
    childInit(String fname, long pool)
    Deprecated.
    Re-open a mutex in a child process.
    static long
    create(String fname, int mech, long pool)
    Deprecated.
    Create and initialize a mutex that can be used to synchronize both processes and threads.
    static int
    destroy(long mutex)
    Deprecated.
    Destroy the mutex and free the memory associated with the lock.
    static int
    lock(long mutex)
    Deprecated.
    Acquire the lock for the given mutex.
    static int
    trylock(long mutex)
    Deprecated.
    Attempt to acquire the lock for the given mutex.
    static int
    unlock(long mutex)
    Deprecated.
    Release the lock for the given mutex.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Global

      public Global()
      Deprecated.

  • Method Details

    • create

      public static long create(String fname, int mech, long pool) throws Error
      Deprecated.
      Create and initialize a mutex that can be used to synchronize both processes and threads. Note: There is considerable overhead in using this API if only cross-process or cross-thread mutual exclusion is required. See apr_proc_mutex.h and apr_thread_mutex.h for more specialized lock routines.
      Warning : Check APR_HAS_foo_SERIALIZE defines to see if the platform supports APR_LOCK_foo. Only APR_LOCK_DEFAULT is portable.
      Parameters:
      fname - A file name to use if the lock mechanism requires one. This argument should always be provided. The lock code itself will determine if it should be used.
      mech - The mechanism to use for the interprocess lock, if any; one of 
                  APR_LOCK_FCNTL
            APR_LOCK_FLOCK
            APR_LOCK_SYSVSEM
            APR_LOCK_POSIXSEM
            APR_LOCK_PROC_PTHREAD
            APR_LOCK_DEFAULT     pick the default mechanism for the platform
      pool - the pool from which to allocate the mutex.
      Returns:
      Newly created mutex.
      Throws:
      Error - If an error occurred

    • childInit

      public static long childInit(String fname, long pool) throws Error
      Deprecated.
      Re-open a mutex in a child process.
      Parameters:
      fname - A file name to use if the mutex mechanism requires one. This argument should always be provided. The mutex code itself will determine if it should be used. This filename should be the same one that was passed to apr_proc_mutex_create().
      pool - The pool to operate on. This function must be called to maintain portability, even if the underlying lock mechanism does not require it.
      Returns:
      Newly opened mutex.
      Throws:
      Error - If an error occurred

    • lock

      public static int lock(long mutex)
      Deprecated.
      Acquire the lock for the given mutex. If the mutex is already locked, the current thread will be put to sleep until the lock becomes available.
      Parameters:
      mutex - the mutex on which to acquire the lock.
      Returns:
      the operation status

    • trylock

      public static int trylock(long mutex)
      Deprecated.
      Attempt to acquire the lock for the given mutex. If the mutex has already been acquired, the call returns immediately with APR_EBUSY. Note: it is important that the APR_STATUS_IS_EBUSY(s) macro be used to determine if the return value was APR_EBUSY, for portability reasons.
      Parameters:
      mutex - the mutex on which to attempt the lock acquiring.
      Returns:
      the operation status

    • unlock

      public static int unlock(long mutex)
      Deprecated.
      Release the lock for the given mutex.
      Parameters:
      mutex - the mutex from which to release the lock.
      Returns:
      the operation status

    • destroy

      public static int destroy(long mutex)
      Deprecated.
      Destroy the mutex and free the memory associated with the lock.
      Parameters:
      mutex - the mutex to destroy.
      Returns:
      the operation status