## NAME

ACE_WIN32_Asynch_Read_File_Result -

This is class provides concrete implementation for ACE_Asynch_Read_File::Result class.

## SYNOPSIS

    class ACE_WIN32_Asynch_Read_File_Result :
      public virtual ACE_Asynch_Read_File_Result_Impl,
      public ACE_WIN32_Asynch_Read_Stream_Result
    {
      public:
        friend class ACE_WIN32_Asynch_Read_File;
        friend class ACE_WIN32_Proactor;
        u_long bytes_transferred (void) const;
        const void *act (void) const;
        int success (void) const;
        const void *completion_key (void) const;
        u_long error (void) const;
        ACE_HANDLE event (void) const;
        u_long offset (void) const;
        u_long offset_high (void) const;
        int priority (void) const;
        int signal_number (void) const;
        u_long bytes_to_read (void) const;
        ACE_Message_Block &message_block (void) const;
        ACE_HANDLE handle (void) const;
        int post_completion (ACE_Proactor_Impl *proactor);
      protected:
        ACE_WIN32_Asynch_Read_File_Result (
            ACE_Handler &handler,
            ACE_HANDLE handle,
            ACE_Message_Block &message_block,
            u_long bytes_to_read,
            const void* act,
            u_long offset,
            u_long offset_high,
            ACE_HANDLE event,
            int priority,
            int signal_number = 0
            );
        virtual void complete (
            u_long bytes_transferred,
            int success,
            const void *completion_key,
            u_long error
            );
        virtual ~ACE_WIN32_Asynch_Read_File_Result (void);
    };

## DESCRIPTION

These classes only works on Win32 platforms.

The implementation of `ACE_Asynch_Transmit_File` and `ACE_Asynch_Accept` are only supported if ACE_HAS_WINSOCK2 is defined or you are on WinNT 4.0 or higher.

## These methods belong to ACE_WIN32_Asynch_Result class base

class. These operations are here to kill some warnings. These methods call the base class methods.

    u_long bytes_transferred (void) const;

Number of bytes transferred by the operation.

    const void *act (void) const;

ACT associated with the operation.

    int success (void) const;

Did the operation succeed?

    const void *completion_key (void) const;

This returns the ACT associated with the handle when it was registered with the I/O completion port. This ACT is not the same as the ACT associated with the asynchronous operation.

    u_long error (void) const;

Error value if the operation fail.

    ACE_HANDLE event (void) const;

Event associated with the OVERLAPPED structure.

    u_long offset (void) const;

This really make sense only when doing file I/O.

    u_long offset_high (void) const;

Offset_high associated with the OVERLAPPED structure.

    int priority (void) const;

The priority of the asynchronous operation. Currently, this is not supported on Win32.

    int signal_number (void) const;

No-op. Returns 0.

The following methods belong to ACE_WIN32_Asynch_Read_Stream_Result. They are here to avoid VC++ dominance warnings. These methods route their call to the ACE_WIN32_Asynch_Read_Stream_Result base class.

    u_long bytes_to_read (void) const;

The number of bytes which were requested at the start of the asynchronous read.

    ACE_Message_Block &message_block (void) const;

Message block which contains the read data.

    ACE_HANDLE handle (void) const;

I/O handle used for reading.

    int post_completion (ACE_Proactor_Impl *proactor);

Post `this` to the Proactor's completion port.

## AUTHOR

Irfan Pyarali (irfan@cs.wustl.edu), Tim Harrison (harrison@cs.wustl.edu) and Alexander Babu Arulanthu `alex@cs.wustl.edu`

## LIBRARY

ace