src/base/AsyncCallQueue.h

   1 /*
   2  * Copyright (C) 1996-2015 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_ASYNCCALLQUEUE_H
  10 #define SQUID_ASYNCCALLQUEUE_H
  11
  12 #include "base/AsyncCall.h"
  13
  14 //class AsyncCall;
  15
  16 // The queue of asynchronous calls. All calls are fired during a single main
  17 // loop iteration until the queue is exhausted
  18 class AsyncCallQueue
  19 {
  20 public:
  21     // there is only one queue
  22     static AsyncCallQueue &Instance();
  23
  24     // make this async call when we get a chance
  25     void schedule(AsyncCall::Pointer &call);
  26
  27     // fire all scheduled calls; returns true if at least one was fired
  28     bool fire();
  29
  30 private:
  31     AsyncCallQueue();
  32
  33     void fireNext();
  34
  35     AsyncCall::Pointer theHead;
  36     AsyncCall::Pointer theTail;
  37
  38     static AsyncCallQueue *TheInstance;
  39 };
  40
  41 #endif /* SQUID_ASYNCCALLQUEUE_H */
  42