AsyncCallQueue.h

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/*
 * Copyright (C) 1996-2022 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */
 
#ifndef SQUID_ASYNCCALLQUEUE_H
#define SQUID_ASYNCCALLQUEUE_H
 
#include "base/AsyncCallList.h"
#include "base/forward.h"
 
// The queue of asynchronous calls. All calls are fired during a single main
// loop iteration until the queue is exhausted
class AsyncCallQueue
{
public:
    // there is only one queue
    static AsyncCallQueue &Instance();
 
    // make this async call when we get a chance
    void schedule(const AsyncCallPointer &call) { scheduled.add(call); }
 
    // fire all scheduled calls; returns true if at least one was fired
    bool fire();
 
private:
    AsyncCallQueue() = default;
 
    AsyncCallList scheduled; 
 
    static AsyncCallQueue *TheInstance;
};
 
#endif /* SQUID_ASYNCCALLQUEUE_H */