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sue_wait.hpp

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#include <sys/types.h> // for pid_t

#include "sue_sel.hpp"


class SUEChildWaitAgent;


class SUEChildHandler {
    int status;
    pid_t pid;
public:
    SUEChildHandler(pid_t a_pid, SUEChildWaitAgent *a_agent);
    virtual ~SUEChildHandler() {}


    virtual void ChildHandle() {}
    
protected:
    pid_t GetPid() const { return pid; }

    bool IfExited() const;

    int ExitCode() const;

    bool IfSignaled() const;

    int TermSig() const;
    
private:
    friend SUEChildWaitAgent;
    void AgentsHandler(int a_status) {
        status = a_status;
        ChildHandle();
        pid = 0;
        delete this;
    }
};


class SUEChildWaitAgent : public SUESignalHandler {
    struct ChildListItem {
        ChildListItem *next;
        SUEChildHandler *handler;
    } *first;
    SUEEventSelector *the_selector;
public:
    SUEChildWaitAgent();
    virtual ~SUEChildWaitAgent();
    
    void Register(SUEEventSelector *a_selector);
    void Unregister();


    void RegisterChildHandler(SUEChildHandler *h);

    void RemoveChildHandler(SUEChildHandler *h);
private:
    virtual void SignalHandle();
};

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