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ACE_DLL Class Reference

Provides an abstract interface for handling various DLL operations. More...

#include <DLL.h>

List of all members.

Public Methods

 ACE_DLL (int close_on_destruction = 1)
 Default constructor. By default, the <close> operation on the object will be invoked before it is destroyed.

 ACE_DLL (const ACE_TCHAR *dll_name, int open_mode = ACE_DEFAULT_SHLIB_MODE, int close_on_destruction = 1)
int open (const ACE_TCHAR *dll_name, int open_mode = ACE_DEFAULT_SHLIB_MODE, int close_on_destruction = 1)
int close (void)
 Call to close the DLL object.

 ~ACE_DLL (void)
void* symbol (const ACE_TCHAR *symbol_name)
 If <symbol_name> is in the symbol table of the DLL a pointer to the <symbol_name> is returned. Otherwise, returns 0.

ACE_TCHARerror (void)
 Returns a pointer to a string explaining why <symbol> or <open> failed.

ACE_SHLIB_HANDLE get_handle (int become_owner = 0)
int set_handle (ACE_SHLIB_HANDLE handle, int close_on_destruction = 1)
 Set the handle for the DLL object. By default, the <close> operation on the object will be invoked before it is destroyed.


Private Methods

 ACE_DLL (const ACE_DLL &)
void operator= (const ACE_DLL &)

Private Attributes

ACE_SHLIB_HANDLE handle_
 This is a handle to the DLL.

int close_on_destruction_
 This flag keeps track of whether we should close the handle automatically when the destructor runs.


Detailed Description

Provides an abstract interface for handling various DLL operations.

This class is an wrapper over the various methods for utilizing a dynamically linked library (DLL), which is called a shared library on some platforms. Operations <open>, <close>, and <symbol> have been implemented to help opening/closing and extracting symbol information from a DLL, respectively.


Constructor & Destructor Documentation

ACE_DLL::ACE_DLL ( int close_on_destruction = 1 ) [inline]
 

Default constructor. By default, the <close> operation on the object will be invoked before it is destroyed.

ACE_DLL::ACE_DLL ( const ACE_TCHAR * dll_name,
int open_mode = ACE_DEFAULT_SHLIB_MODE,
int close_on_destruction = 1 )
 

This constructor opens and dynamically links <dll_name>. The default mode is <RTLD_LAZY>, which loads identifier symbols but not the symbols for functions, which are loaded dynamically on-demand. Other supported modes include: <RTLD_NOW>, which performs all necessary relocations when <dll_name> is first loaded and <RTLD_GLOBAL>, which makes symbols available for relocation processing of any other DLLs.

ACE_DLL::~ACE_DLL ( void )
 

Called when the DLL object is destroyed -- invokes <close> if the <close_on_destruction> flag is set in the constructor or <open> method.

ACE_DLL::ACE_DLL ( const ACE_DLL & ) [private]
 


Member Function Documentation

int ACE_DLL::close ( void )
 

Call to close the DLL object.

ACE_TCHAR * ACE_DLL::error ( void )
 

Returns a pointer to a string explaining why <symbol> or <open> failed.

ACE_SHLIB_HANDLE ACE_DLL::get_handle ( int become_owner = 0 )
 

Return the handle to the caller. If <become_owner> is non-0 then caller assumes ownership of the handle and the object won't call <close> when it goes out of scope, even if <close_on_destruction> is set.

int ACE_DLL::open ( const ACE_TCHAR * dll_name,
int open_mode = ACE_DEFAULT_SHLIB_MODE,
int close_on_destruction = 1 )
 

This method opens and dynamically links <dll_name>. The default mode is <RTLD_LAZY>, which loads identifier symbols but not the symbols for functions, which are loaded dynamically on-demand. Other supported modes include: <RTLD_NOW>, which performs all necessary relocations when <dll_name> is first loaded and <RTLD_GLOBAL>, which makes symbols available for relocation processing of any other DLLs. Returns -1 on failure and 0 on success.

void ACE_DLL::operator= ( const ACE_DLL & ) [private]
 

int ACE_DLL::set_handle ( ACE_SHLIB_HANDLE handle,
int close_on_destruction = 1 )
 

Set the handle for the DLL object. By default, the <close> operation on the object will be invoked before it is destroyed.

void * ACE_DLL::symbol ( const ACE_TCHAR * symbol_name )
 

If <symbol_name> is in the symbol table of the DLL a pointer to the <symbol_name> is returned. Otherwise, returns 0.


Member Data Documentation

int ACE_DLL::close_on_destruction_ [private]
 

This flag keeps track of whether we should close the handle automatically when the destructor runs.

ACE_SHLIB_HANDLE ACE_DLL::handle_ [private]
 

This is a handle to the DLL.


The documentation for this class was generated from the following files:
Generated at Wed Nov 21 10:30:12 2001 for ACE by doxygen1.2.3 written by Dimitri van Heesch, © 1997-2000