Selectable.hxx

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#ifndef _EXECUTOR_SELECTABLE_HXX_
#define _EXECUTOR_SELECTABLE_HXX_
 
class Selectable : public QMember
{
public:
    enum SelectType
    {
        READ = 1,
        WRITE = 2,
        EXCEPT = 3,
    };
 
    enum Limits
    {
        MAX_FD = (1 << 14) - 1,
        MAX_PRIO = (1 << 16) - 1,
    };
 
    Selectable(Executable *parent) : selectType_(0), wakeup_(parent)
    {
    }
 
    void reset(SelectType type, int fd, unsigned priority)
    {
        selectType_ = type;
        HASSERT(fd <= MAX_FD);
        fd_ = fd;
        priority_ = std::min((unsigned)priority, (unsigned)MAX_PRIO);
    }
 
    bool is_empty() {
        return selectType_ == 0;
    }
 
    unsigned priority()
    {
        return priority_;
    }
 
    SelectType type()
    {
        return static_cast<SelectType>(selectType_);
    }
 
    Executable *parent()
    {
        return wakeup_;
    }
 
    int fd()
    {
        return fd_;
    }
 
    void set_wakeup(Executable *e)
    {
        wakeup_ = e;
    }
 
private:
    friend class ExecutorBase;
 
    unsigned selectType_ : 2;
    unsigned fd_ : 14;
    unsigned priority_ : 16;
    Executable *wakeup_;
};
 
#endif // _EXECUTOR_SELECTABLE_HXX_