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--Copyright: Matra Datavision 1994
-- SharedLibrary: OSD_SharedLibrary.cdl
-- Created: August 30, 1994
-- Author: J.P. TIRAULT
class SharedLibrary from OSD
---Purpose: Interface to dynamic library loader.
uses LoadMode,Function
is
Create returns SharedLibrary;
---Purpose: Creates a SharedLibrary object with name NULL.
---Level: Public
Create (aFilename : CString) returns SharedLibrary;
---Purpose: Creates a SharedLibrary object with name aFilename.
---Level: Public
SetName (me : out ; aName : CString)
---Purpose: Sets a name associated to the shared object.
---Level: Public
is static;
Name (me)
---Purpose: Returns the name associated to the shared object.
---Level: Public
returns CString
is static;
DlOpen (me : out ; Mode : LoadMode)
---Purpose: The DlOpen method provides an interface to the
-- dynamic library loader to allow shared libraries
-- to be loaded and called at runtime. The DlOpen
-- function attempts to load Filename, in the address
-- space of the process, resolving symbols as appropriate.
-- Any libraries that Filename depends upon are also loaded.
-- If MODE is RTLD_LAZY, then the runtime loader
-- does symbol resolution only as needed.
-- Typically, this means that the first call to a function
-- in the newly loaded library will cause the resolution of
-- the address of that function to occur.
-- If Mode is RTLD_NOW, then the runtime loader must do all
-- symbol binding during the DlOpen call.
-- The DlOpen method returns a handle that is used by DlSym
-- or DlClose.
-- If there is an error, Standard_False is returned,
-- Standard_True otherwise.
-- If a NULL Filename is specified, DlOpen returns a handle
-- for the main executable, which allows access to dynamic
-- symbols in the running program.
---Level: Public
returns Boolean
is static;
DlSymb (me; Name : CString)
---Purpose: The dlsym function returns the address of the
-- symbol name found in the shared library.
-- If the symbol is not found, a NULL pointer is
-- returned.
---Level: Public
returns Function
is static;
DlClose (me)
---Purpose: Deallocates the address space for the library
-- corresponding to the shared object.
-- If any user function continues to call a symbol
-- resolved in the address space of a library
-- that has been since been deallocated by DlClose,
-- the results are undefined.
---Level: Public
is static;
DlError (me)
---Purpose: The dlerror function returns a string describing
-- the last error that occurred from
-- a call to DlOpen, DlClose or DlSym.
---Level: Public
returns CString
is static;
Destroy (me : in out)
---Level: Public
---Purpose: Frees memory allocated.
---C++: alias ~
is static;
fields
myHandle : Address;
myName : PCharacter;
end SharedLibrary from OSD;
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