abort_callback.h

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#ifndef _foobar2000_sdk_abort_callback_h_
#define _foobar2000_sdk_abort_callback_h_

namespace foobar2000_io {

PFC_DECLARE_EXCEPTION(exception_aborted,pfc::exception,"User abort");

#ifdef _WIN32
typedef HANDLE abort_callback_event;
#else
#error PORTME
#endif

class NOVTABLE abort_callback
{
public:
        virtual bool is_aborting() const = 0;

        virtual abort_callback_event get_abort_event() const = 0;
        
        void check() const;

        inline void check_e() const {check();}

        
        void sleep(double p_timeout_seconds) const;
        bool sleep_ex(double p_timeout_seconds) const;
protected:
        abort_callback() {}
        ~abort_callback() {}
};



class abort_callback_impl : public abort_callback {
public:
        abort_callback_impl() : m_aborting(false) {
                m_event.create(true,false);
        }
        inline void abort() {set_state(true);}
        inline void reset() {set_state(false);}

        void set_state(bool p_state) {m_aborting = p_state; m_event.set_state(p_state);}

        bool is_aborting() const {return m_aborting;}

        abort_callback_event get_abort_event() const {return m_event.get();}

private:
        abort_callback_impl(const abort_callback_impl &) {throw pfc::exception_not_implemented();}
        const abort_callback_impl & operator=(const abort_callback_impl&) {throw pfc::exception_not_implemented();}
        
        volatile bool m_aborting;
#ifdef WIN32
        win32_event m_event;
#endif
};

typedef abort_callback_impl abort_callback_dummy;

}

using namespace foobar2000_io;

#endif //_foobar2000_sdk_abort_callback_h_

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