ibase_set_event_handler(3) [php man page]

IBASE_SET_EVENT_HANDLER(3)						 1						IBASE_SET_EVENT_HANDLER(3)

ibase_set_event_handler - Register a callback function to be called when events are posted

SYNOPSIS

       resource ibase_set_event_handler (callable  $event_handler, string  $event_name1, [string  $event_name2], [string  $...])

DESCRIPTION

       resource  ibase_set_event_handler  (resource   $connection, callable  $event_handler, string  $event_name1, [string  $event_name2], [string
       $...])

	This function registers a PHP user function as event handler for the specified events.

PARAMETERS

	      o $event_handler
		- The callback is called with the event name and the link resource as arguments whenever one of the specified events is posted	by
		the  database.	 The  callback	must return FALSE if the event handler should be canceled. Any other return value is ignored. This
		function accepts up to 15 event arguments.

	      o $event_name1
		- An event name.

	      o $event_name2
		- At most 15 events allowed.

RETURN VALUES

	The return value is an event resource. This resource can be used to free the event handler using ibase_free_event_handler(3).

EXAMPLES

       Example #1

	      ibase_set_event_handler(3) example

	      <?php

	      function event_handler($event_name, $link)
	      {
		  if ($event_name == "NEW ORDER") {
		      // process new order
		      ibase_query($link, "UPDATE orders SET status='handled'");
		  } else if ($event_name == "DB_SHUTDOWN") {
		      // free event handler
		      return false;
		  }
	      }

	      ibase_set_event_handler($link, "event_handler", "NEW_ORDER", "DB_SHUTDOWN");
	      ?>

SEE ALSO

       ibase_free_event_handler(3), ibase_wait_event(3).

PHP Documentation Group 												IBASE_SET_EVENT_HANDLER(3)

sysevent_bind_handle(3SYSEVENT) 			  System Event Library Functions			   sysevent_bind_handle(3SYSEVENT)

NAME

       sysevent_bind_handle, sysevent_unbind_handle - bind or unbind subscriber handle

SYNOPSIS

       cc [flag...]  file ... -lsysevent [library ...]
       #include <libsysevent.h>

       sysevent_handle_t *sysevent_bind_handle(void (*event_handler)
	    (sysevent_t *ev));

       void sysevent_unbind_handle(sysevent_handle_t *sysevent_hdl);

PARAMETERS

       ev		pointer to sysevent buffer handle

       event_handler	pointer to an event handling function

       sysevent_hdl	pointer to a sysevent subscriber handle

DESCRIPTION

       The sysevent_bind_handle() function allocates memory associated with a subscription handle and binds it to the caller's event_handler.  The
       event_handler  is  invoked  during  subsequent  system  event  notifications  once  a  subscription  has  been  made   with   sysevent_sub-
       scribe_event(3SYSEVENT).

       The system event is represented by the argument ev and is passed as an argument to the invoked event delivery function, event_handler.

       Additional threads are created to service communication between syseventd(1M) and the calling process and to run the event handler routine,
       event_handler.

       The sysevent_unbind_handle() function deallocates memory and other resources associated with a subscription handle and deactivates all sys-
       tem event notifications for the calling process.  All event notifications are guaranteed to stop upon return from sysevent_unbind_handle().

RETURN VALUES

       The sysevent_bind_handle() function returns a valid sysevent subscriber handle if the handle is successfully allocated.	Otherwise, NULL is
       returned and errno is set to indicate the error.

       The sysevent_unbind_handle() function returns no value.

ERRORS

       The sysevent_bind_handle() function will fail if:

       EACCES	 The calling process has an ID other than the privileged user.

       EBUSY	 There are no resources available.

       EINVAL	 The pointer to the function event_handler is NULL.

       EMFILE	 The process has too many open descriptors.

       ENOMEM	 There are insufficient resources to allocate the handle.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       syseventd(1M), sysevent_subscribe_event(3SYSEVENT), attributes(5)

NOTES

       Event notifications are revoked by syseventd when the bound process dies.  Event notification is suspended if a signal is caught  and  han-
       dled  by  the  event_handler  thread.   Event  notification is also suspended when the calling process attempts to use fork(2) or fork1(2).
       Event notifications might be lost during suspension periods.

SunOS 5.11							    12 Nov 2001 				   sysevent_bind_handle(3SYSEVENT)