ACE_Sig_Handlers Class Reference

This is an alternative signal handling dispatcher for ACE. It allows a list of signal handlers to be registered for each signal. It also makes SA_RESTART the default mode. More...

#include <Signal.h>

Inheritance diagram for ACE_Sig_Handlers:

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Collaboration diagram for ACE_Sig_Handlers:

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List of all members.

Public Member Functions

virtual int register_handler (int signum, ACE_Event_Handler *new_sh, ACE_Sig_Action *new_disp=0, ACE_Event_Handler **old_sh=0, ACE_Sig_Action *old_disp=0)
virtual int remove_handler (int signum, ACE_Sig_Action *new_disp=0, ACE_Sig_Action *old_disp=0, int sigkey=-1)
virtual ACE_Event_Handlerhandler (int signum)
virtual ACE_Event_Handlerhandler (int signum, ACE_Event_Handler *)
void dump (void) const
 Dump the state of an object.

Static Public Member Functions

static void dispatch (int signum, siginfo_t *, ucontext_t *)

Public Attributes

 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks.

Static Private Attributes

static int sigkey_ = 0
static int third_party_sig_handler_ = 0

Detailed Description

This is an alternative signal handling dispatcher for ACE. It allows a list of signal handlers to be registered for each signal. It also makes SA_RESTART the default mode.

Using this class a program can register one or more ACE_Event_Handler with the ACE_Sig_Handler in order to handle a designated <signum>. When a signal occurs that corresponds to this <signum>, the <handle_signal> methods of all the registered ACE_Event_Handlers are invoked automatically.


Member Function Documentation

void ACE_Sig_Handlers::dispatch int  signum,
siginfo_t ,
ucontext_t
[static]
 

Callback routine registered with sigaction(2) that dispatches the <handle_signal> method of all the pre-registered ACE_Event_Handlers for <signum>

Reimplemented from ACE_Sig_Handler.

void ACE_Sig_Handlers::dump void   )  const
 

Dump the state of an object.

Reimplemented from ACE_Sig_Handler.

ACE_Event_Handler * ACE_Sig_Handlers::handler int  signum,
ACE_Event_Handler
[virtual]
 

Set a new <ACE_Event_Handler> that is associated with SIGNUM at the head of the list of signals. Return the existing handler that was at the head.

Reimplemented from ACE_Sig_Handler.

ACE_Event_Handler * ACE_Sig_Handlers::handler int  signum  )  [virtual]
 

Return the head of the list of <ACE_Sig_Handler>s associated with SIGNUM.

Reimplemented from ACE_Sig_Handler.

int ACE_Sig_Handlers::register_handler int  signum,
ACE_Event_Handler new_sh,
ACE_Sig_Action new_disp = 0,
ACE_Event_Handler **  old_sh = 0,
ACE_Sig_Action old_disp = 0
[virtual]
 

Add a new ACE_Event_Handler and a new sigaction associated with <signum>. Passes back the existing ACE_Event_Handler and its sigaction if pointers are non-zero. Returns -1 on failure and a <sigkey> that is >= 0 on success.

Reimplemented from ACE_Sig_Handler.

int ACE_Sig_Handlers::remove_handler int  signum,
ACE_Sig_Action new_disp = 0,
ACE_Sig_Action old_disp = 0,
int  sigkey = -1
[virtual]
 

Remove an <ACE_Event_Handler> currently associated with <signum>. We remove the handler if (1) its <sigkey> matches the <sigkey> passed as a parameter or (2) if we've been told to remove all the handlers, i.e., <sigkey> == -1. If a new disposition is given it is installed and the previous disposition is returned (if desired by the caller). Returns 0 on success and -1 if <signum> is invalid.

Reimplemented from ACE_Sig_Handler.


Member Data Documentation

ACE_Sig_Handlers::ACE_ALLOC_HOOK_DECLARE
 

Declare the dynamic allocation hooks.

Reimplemented from ACE_Sig_Handler.

int ACE_Sig_Handlers::sigkey_ = 0 [static, private]
 

Keeps track of the id that uniquely identifies each registered signal handler. This id can be used to cancel a timer via the <remove_handler> method.

int ACE_Sig_Handlers::third_party_sig_handler_ = 0 [static, private]
 

If this is > 0 then a 3rd party library has registered a handler...


The documentation for this class was generated from the following files:
Generated on Wed Nov 23 15:50:30 2005 for ACE by  doxygen 1.4.5