ACE_POSIX_SIG_Asynch_Read_File3

This class is a factory for starting off asynchronous reads on a file. this class implements ace_asynch_operation for real-time signal (sigtimedwait) based implementation of proactor.

Usage

class ACE_POSIX_SIG_Asynch_Read_File : 
  public virtual ACE_Asynch_Read_File_Impl,
  public ACE_POSIX_SIG_Asynch_Read_Stream
{
  public:
    ACE_POSIX_SIG_Asynch_Read_File (
        ACE_POSIX_SIG_Proactor *posix_sig_proactor
        );
    int read (
        ACE_Message_Block &message_block,
        u_long bytes_to_read,
        u_long offset,
        u_long offset_high,
        const void *act,
        int priority,
        int signal_number
        );
    virtual ~ACE_POSIX_SIG_Asynch_Read_File (void);
    int open (
        ACE_Handler &handler,
        ACE_HANDLE handle,
        const void *completion_key,
        ACE_Proactor *proactor = 0
        );
    int cancel (void);
    ACE_Proactor* proactor (void) const;
  private:
    int read (
        ACE_Message_Block &message_block,
        u_long bytes_to_read,
        const void *act,
        int priority,
        int signal_number
        );
};

Overview

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

Methods belong to ACE_POSIX_Asynch_Operation base class. These

methods are defined here to avoid dominace warnings. They route the call to the ACE_POSIX_Asynch_Operation base class.

int open (
    ACE_Handler &handler,
    ACE_HANDLE handle,
    const void *completion_key,
    ACE_Proactor *proactor = 0
    );

Initializes the factory with information which will be used with each asynchronous call. If (handle == ACE_INVALID_HANDLE), ACE_Handler::handle will be called on the handler to get the correct handle.

int cancel (void);

@@ Not implemented. Returns 0.

ACE_Proactor* proactor (void) const;

Return the underlying proactor.

Library

ace