| java.lang.Object
 org.apache.tomcat.jni.Global
| Global | | public class Global (Code) | | Global
author:
Mladen Turk
version:
$Revision: 467222 $, $Date: 2006-10-24 05:17:11 +0200 (mar., 24 oct. 2006) $ |
| Method Summary | |
| native public static long | childInit(String fname, long pool)
Re-open a mutex in a child process.
Parameters:
fname - A file name to use if the mutex mechanism requires one. | | native public static long | create(String fname, int mech, long pool)
Create and initialize a mutex that can be used to synchronize both
processes and threads. | | native public static int | destroy(long mutex)
Destroy the mutex and free the memory associated with the lock. | | native public static int | lock(long mutex)
Acquire the lock for the given mutex. | | native public static int | trylock(long mutex)
Attempt to acquire the lock for the given mutex. | | native public static int | unlock(long mutex)
Release the lock for the given mutex. |
| childInit | | native public static long childInit(String fname, long pool) throws Error(Code) | | Re-open a mutex in a child process.
Parameters:
fname - A file name to use if the mutex mechanism requires one. Thisargument should always be provided. The mutex code itself willdetermine if it should be used. This filename should be thesame one that was passed to apr_proc_mutex_create().
Parameters:
pool - The pool to operate on.This function must be called to maintain portability, evenif the underlying lock mechanism does not require it. Newly opened mutex. |
| create | | native public static long create(String fname, int mech, long pool) throws Error(Code) | | 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. Thisargument should always be provided. The lock code itself willdetermine if it should be used.
Parameters:
mech - The mechanism to use for the interprocess lock, if any; one ofAPR_LOCK_FCNTLAPR_LOCK_FLOCKAPR_LOCK_SYSVSEMAPR_LOCK_POSIXSEMAPR_LOCK_PROC_PTHREADAPR_LOCK_DEFAULT pick the default mechanism for the platform
Parameters:
pool - the pool from which to allocate the mutex. Newly created mutex. |
| destroy | | native public static int destroy(long mutex)(Code) | | Destroy the mutex and free the memory associated with the lock.
Parameters:
mutex - the mutex to destroy. |
| lock | | native public static int lock(long mutex)(Code) | | 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. |
| trylock | | native public static int trylock(long mutex)(Code) | | 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. |
| unlock | | native public static int unlock(long mutex)(Code) | | Release the lock for the given mutex.
Parameters:
mutex - the mutex from which to release the lock. |
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