ACE/ace/Sig_Adapter.cpp

   1 #include "ace/Sig_Adapter.h"
   2
   3 ACE_Sig_Adapter::ACE_Sig_Adapter (ACE_Sig_Action &sa, int sigkey)
   4   : sigkey_ (sigkey),
   5     type_ (SIG_ACTION),
   6     sa_ (sa),
   7     sig_func_ (nullptr)
   8 {
   9 }
  10
  11 ACE_Sig_Adapter::ACE_Sig_Adapter (ACE_Event_Handler *eh, int sigkey)
  12   : sigkey_ (sigkey),
  13     type_ (ACE_HANDLER),
  14     eh_ (eh),
  15     sig_func_ (nullptr)
  16 {
  17 }
  18
  19 ACE_Sig_Adapter::ACE_Sig_Adapter (ACE_Sig_Handler_Ex sig_func, int sigkey)
  20   : sigkey_ (sigkey),
  21     type_ (C_FUNCTION),
  22     sig_func_ (sig_func)
  23 {
  24 }
  25
  26 ACE_ALLOC_HOOK_DEFINE(ACE_Sig_Adapter)
  27
  28 int
  29 ACE_Sig_Adapter::sigkey () const
  30 {
  31   ACE_TRACE ("ACE_Sig_Adapter::sigkey");
  32   return this->sigkey_;
  33 }
  34
  35 int
  36 ACE_Sig_Adapter::handle_signal (int signum, siginfo_t *siginfo, ucontext_t *ucontext)
  37 {
  38   ACE_TRACE ("ACE_Sig_Adapter::handle_signal");
  39
  40   switch (this->type_)
  41     {
  42     case SIG_ACTION:
  43       {
  44         // We have to dispatch a handler that was registered by a
  45         // third-party library.
  46         ACE_Sig_Action old_disp;
  47
  48         // Make sure this handler executes in the context it was
  49         // expecting...
  50         this->sa_.register_action (signum, &old_disp);
  51
  52         ACE_SignalHandler sig_handler = this->sa_.handler ();
  53         ACE_Sig_Handler_Ex sig_func = reinterpret_cast<ACE_Sig_Handler_Ex> (reinterpret_cast<void*> (sig_handler));
  54
  55         (*sig_func) (signum, siginfo, ucontext);
  56         // Restore the original disposition.
  57         old_disp.register_action (signum);
  58         break;
  59       }
  60     case ACE_HANDLER:
  61       this->eh_->handle_signal (signum, siginfo, ucontext);
  62       break;
  63     case C_FUNCTION:
  64       (*this->sig_func_) (signum, siginfo, ucontext);
  65       break;
  66     }
  67   return 0;
  68 }