ACE_WIN32_Asynch_Read_File_Result(3)

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 ([email protected]), Tim Harrison ([email protected]) and Alexander Babu Arulanthu [email protected]

LIBRARY

ace