Apache Portable Runtime
Functions
Pool Cleanup Functions
Memory Pool Functions

Functions

void apr_pool_cleanup_register (apr_pool_t *p, const void *data, apr_status_t(*plain_cleanup)(void *), apr_status_t(*child_cleanup)(void *))
void apr_pool_pre_cleanup_register (apr_pool_t *p, const void *data, apr_status_t(*plain_cleanup)(void *))
void apr_pool_cleanup_kill (apr_pool_t *p, const void *data, apr_status_t(*cleanup)(void *))
void apr_pool_child_cleanup_set (apr_pool_t *p, const void *data, apr_status_t(*plain_cleanup)(void *), apr_status_t(*child_cleanup)(void *))
apr_status_t apr_pool_cleanup_run (apr_pool_t *p, void *data, apr_status_t(*cleanup)(void *))
apr_status_t apr_pool_cleanup_null (void *data)
void apr_pool_cleanup_for_exec (void)

Detailed Description

Cleanups are performed in the reverse order they were registered. That is: Last In, First Out. A cleanup function can safely allocate memory from the pool that is being cleaned up. It can also safely register additional cleanups which will be run LIFO, directly after the current cleanup terminates. Cleanups have to take caution in calling functions that create subpools. Subpools, created during cleanup will NOT automatically be cleaned up. In other words, cleanups are to clean up after themselves.


Function Documentation

void apr_pool_child_cleanup_set ( apr_pool_t p,
const void *  data,
apr_status_t(*)(void *)  plain_cleanup,
apr_status_t(*)(void *)  child_cleanup 
)

Replace the child cleanup function of a previously registered cleanup.

The cleanup most recently registered with p having the same values of data and plain_cleanup will have the registered child cleanup function replaced with child_cleanup.

Parameters:
pThe pool of the registered cleanup
dataThe data of the registered cleanup
plain_cleanupThe plain cleanup function of the registered cleanup
child_cleanupThe function to register as the child cleanup
void apr_pool_cleanup_for_exec ( void  )

Run all registered child cleanups, in preparation for an exec() call in a forked child -- close files, etc., but *don't* flush I/O buffers, *don't* wait for subprocesses, and *don't* free any memory.

void apr_pool_cleanup_kill ( apr_pool_t p,
const void *  data,
apr_status_t(*)(void *)  cleanup 
)

Remove a previously registered cleanup function.

The cleanup most recently registered with p having the same values of data and cleanup will be removed.

Parameters:
pThe pool to remove the cleanup from
dataThe data of the registered cleanup
cleanupThe function to remove from cleanup
Remarks:
For some strange reason only the plain_cleanup is handled by this function
apr_status_t apr_pool_cleanup_null ( void *  data)

An empty cleanup function.

Passed to apr_pool_cleanup_register() when no cleanup is required.

Parameters:
dataThe data to cleanup, will not be used by this function.
void apr_pool_cleanup_register ( apr_pool_t p,
const void *  data,
apr_status_t(*)(void *)  plain_cleanup,
apr_status_t(*)(void *)  child_cleanup 
)

Register a function to be called when a pool is cleared or destroyed

Parameters:
pThe pool register the cleanup with
dataThe data to pass to the cleanup function.
plain_cleanupThe function to call when the pool is cleared or destroyed
child_cleanupThe function to call when a child process is about to exec - this function is called in the child, obviously!
apr_status_t apr_pool_cleanup_run ( apr_pool_t p,
void *  data,
apr_status_t(*)(void *)  cleanup 
)

Run the specified cleanup function immediately and unregister it.

The cleanup most recently registered with p having the same values of data and cleanup will be removed and cleanup will be called with data as the argument.

Parameters:
pThe pool to remove the cleanup from
dataThe data to remove from cleanup
cleanupThe function to remove from cleanup
void apr_pool_pre_cleanup_register ( apr_pool_t p,
const void *  data,
apr_status_t(*)(void *)  plain_cleanup 
)

Register a function to be called when a pool is cleared or destroyed.

Unlike apr_pool_cleanup_register which register a cleanup that is called AFTER all subpools are destroyed this function register a function that will be called before any of the subpool is destoryed.

Parameters:
pThe pool register the cleanup with
dataThe data to pass to the cleanup function.
plain_cleanupThe function to call when the pool is cleared or destroyed
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Defines