src/base/AsyncCbdataCalls.h

   1 /*
   2  * Copyright (C) 1996-2022 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #ifndef SQUID_BASE_ASYNCCBDATACALLS_H
  10 #define SQUID_BASE_ASYNCCBDATACALLS_H
  11
  12 #include "base/AsyncCall.h"
  13 #include "base/CbcPointer.h"
  14
  15 // dialer to run cbdata callback functions as Async Calls
  16 // to ease the transition of these cbdata objects to full Jobs
  17 template<class Argument1>
  18 class UnaryCbdataDialer : public CallDialer
  19 {
  20 public:
  21     typedef void Handler(Argument1 *);
  22
  23     UnaryCbdataDialer(Handler *aHandler, Argument1 *aArg) :
  24         arg1(aArg),
  25         handler(aHandler)
  26     {}
  27
  28     virtual bool canDial(AsyncCall &) { return arg1.valid(); }
  29     void dial(AsyncCall &) { handler(arg1.get()); }
  30     void print(std::ostream &os) const override {  os << '(' << arg1 << ')'; }
  31
  32 public:
  33     CbcPointer<Argument1> arg1;
  34     Handler *handler;
  35 };
  36
  37 // helper function to simplify Dialer creation.
  38 template <class Argument1>
  39 UnaryCbdataDialer<Argument1>
  40 cbdataDialer(typename UnaryCbdataDialer<Argument1>::Handler *handler, Argument1 *arg1)
  41 {
  42     return UnaryCbdataDialer<Argument1>(handler, arg1);
  43 }
  44
  45 #endif
  46