Reference

ACE_POSIX_Asynch_Result(3)

This class provides concrete implementation for ACE_Asynch_Result for POSIX4 platforms. This class extends aiocb and makes it more useful.

NAME

ACE_POSIX_Asynch_Result -

This class provides concrete implementation for ACE_Asynch_Result for POSIX4 platforms. This class extends aiocb and makes it more useful.

SYNOPSIS

class ACE_POSIX_Asynch_Result : 
  public virtual ACE_Asynch_Result_Impl,
  public aiocb
{
  public:
    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;
    int post_completion (ACE_Proactor_Impl *proactor);
    virtual ~ACE_POSIX_Asynch_Result (void);
  protected:
    ACE_POSIX_Asynch_Result (
        ACE_Handler &handler,
        const void* act,
        ACE_HANDLE event,
        u_long offset,
        u_long offset_high,
        int priority,
        int signal_number
        );
    ACE_Handler &handler_;
    const void *act_;
    u_long bytes_transferred_;
    int success_;
    const void *completion_key_;
    u_long error_;
};

DESCRIPTION

The implementation classes for POSIX implementation of Asynch Operations are defined here in this file.

PUBLIC MEMBERS

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 is the ACT associated with the handle on which the Asynch_Operation takes place.

@@ This is not implemented for POSIX4 platforms.

u_long error (void) const;

Error value if the operation fail.

ACE_HANDLE event (void) const;

This returns ACE_INVALID_HANDLE on POSIX4 platforms.

u_long offset (void) const;


u_long offset_high (void) const;

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

@@ On POSIX4-Unix, offset_high should be supported using
aiocb64.

int priority (void) const;

Priority of the operation.

int signal_number (void) const;

POSIX4 real-time signal number to be used for the operation. signal_number ranges from SIGRTMIN to SIGRTMAX. By default, SIGRTMIN is used to issue aio_ calls.

int post_completion (ACE_Proactor_Impl *proactor);

Post this to the Proactor.

virtual ~ACE_POSIX_Asynch_Result (void);

Destructor.

PROTECTED MEMBERS

ACE_POSIX_Asynch_Result (
    ACE_Handler &handler,
    const void* act,
    ACE_HANDLE event,
    u_long offset,
    u_long offset_high,
    int priority,
    int signal_number
    );

Constructor. Event is not used on POSIX.

ACE_Handler &handler_;

Handler that will be called back.

const void *act_;

ACT for this operation. We could use aiocb::aio_sigevent.sigev_value.sival_ptr for this. But it doesnot provide the constness, so this may be better.

u_long bytes_transferred_;

Bytes transferred by this operation.

int success_;

Success indicator.

const void *completion_key_;

ACT associated with handle.

u_long error_;

Error if operation failed.

AUTHOR

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

LIBRARY

ace