src/external/3rd/library/perforce/include/signaler.h

   1 /*
   2  * Copyright 1995, 1996 Perforce Software.  All rights reserved.
   3  *
   4  * This file is part of Perforce - the FAST SCM System.
   5  */
   6
   7 /*
   8  * Signaler.h - catch ^C and delete temp files
   9  *
  10  * A single Signaler is declared globally.
  11  *
  12  * Public methods:
  13  *
  14  *      Signaler::Block() -- don't catch the signal until Catch()
  15  *      Signaler::Catch() -- catch and handle SIGINT
  16  *      Signaler::OnIntr() -- call a designated function on SIGINT
  17  *      Signaler::DeleteOnIntr() -- undo OnIntr() call
  18  *
  19  *      Signaler::Intr() -- call functions registered by OnIntr()
  20  *
  21  * Requires cooperation from the TempFile objects to delete files.
  22  */
  23
  24 # ifdef OS_NT
  25 typedef void *HANDLE;
  26 # endif
  27
  28 struct SignalMan;
  29
  30 typedef void (*SignalFunc)( void *ptr );
  31
  32 class Signaler {
  33
  34     public:
  35                         Signaler();
  36
  37         void            Block();
  38         void            Catch();
  39
  40         void            OnIntr( SignalFunc callback, void *ptr );
  41         void            DeleteOnIntr( void *ptr );
  42
  43         void            Intr();
  44
  45     private:
  46
  47         SignalMan       *list;
  48
  49 # ifdef OS_NT
  50         HANDLE          hmutex;
  51 # endif // OS_NT
  52
  53 } ;
  54
  55 extern Signaler signaler;