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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 <Sig_Handler.h>

Inheritance diagram for ACE_Sig_Handlers:
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Collaboration diagram for ACE_Sig_Handlers:
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Public Member Functions

 ACE_Sig_Handlers (void)
 Default constructor. More...
 
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. More...
 
- Public Member Functions inherited from ACE_Sig_Handler
 ACE_Sig_Handler (void)
 Default constructor. More...
 
virtual ~ACE_Sig_Handler (void)
 Destructor. More...
 
void dump (void) const
 Dump the state of an object. More...
 

Static Public Member Functions

static void dispatch (int signum, siginfo_t *, ucontext_t *)
 
- Static Public Member Functions inherited from ACE_Sig_Handler
static int sig_pending (void)
 True if there is a pending signal. More...
 
static void sig_pending (int)
 Reset the value of <sig_pending_> so that no signal is pending. More...
 
static void dispatch (int, siginfo_t *, ucontext_t *)
 

Public Attributes

 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks. More...
 
- Public Attributes inherited from ACE_Sig_Handler
 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks. More...
 

Static Private Attributes

static int sigkey_ = 0
 
static bool third_party_sig_handler_ = false
 

Additional Inherited Members

- Static Protected Member Functions inherited from ACE_Sig_Handler
static ACE_Event_Handlerhandler_i (int signum, ACE_Event_Handler *)
 
static int register_handler_i (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)
 
static int remove_handler_i (int signum, ACE_Sig_Action *new_disp=0, ACE_Sig_Action *old_disp=0, int sigkey=-1)
 
static int in_range (int signum)
 Check whether the SIGNUM is within the legal range of signals. More...
 
- Static Protected Attributes inherited from ACE_Sig_Handler
static sig_atomic_t sig_pending_ = 0
 Keeps track of whether a signal is pending. More...
 

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.

Constructor & Destructor Documentation

ACE_Sig_Handlers::ACE_Sig_Handlers ( void  )

Default constructor.

Member Function Documentation

void ACE_Sig_Handlers::dispatch ( int  signum,
siginfo_t siginfo,
ucontext_t ucontext 
)
static

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

void ACE_Sig_Handlers::dump ( void  ) const

Dump the state of an object.

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.

ACE_Event_Handler * ACE_Sig_Handlers::handler ( int  signum,
ACE_Event_Handler new_sh 
)
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.

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.

int ACE_Sig_Handlers::sigkey_ = 0
staticprivate

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.

bool ACE_Sig_Handlers::third_party_sig_handler_ = false
staticprivate

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


The documentation for this class was generated from the following files: