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// -*- C++ -*-
// $Id$
// File: Obj_Module.h
// Author: Phil Mesnier
#ifndef _OBJ_MODULE_H_
#define _OBJ_MODULE_H_
// Obj_Module encapsulates the result of applying nm to a single object module
// in a shared library. Currently an object module consists of two types of
// signatures, those that are exported, able to resolve references from others,
// and those that are imported, needing resolution.
//
// Obj_Modules keep track of external references. In the end, any module that
// has one or more external references to it must be included in the resulting
// library. While the means exists to remove external references, perhaps
// through further analysis of undefined signatures and their usage, this is
// not currently done. Once a technique is discovered to allow for easy
// determination that reference is truly unneeded this code may be useful.
#include "Sig_List.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
class ACE_Message_Block;
ACE_END_VERSIONED_NAMESPACE_DECL
class Obj_Module {
public:
Obj_Module ( const ACE_CString &, int = 500);
// Returns the list of exported signatures, ie. those that are defined in
// this module
Sig_List & exports();
// Returns the list of signatures used by this module but not defined within
Sig_List & imports();
// Returns the name of the object module.
ACE_CString &name();
// Add_source invokes GNU nm on the supplied file and parses the output to
// build the list of imported and exported signatures. When replacing GNU
// nm to use a different tool, this method must be modified. In the future
// this could be a virtual to allow for specialization based on toolset.
void add_source (const char *, int = 0);
// Get the number of external references to this object module. At the end
// of processing, if the number of external references is 0, the module is
// not included in the final library.
int extref ();
// add a new external reference to this module.
void add_extref ();
// remove an exterenal reference. Currently, this function is not used.
void remove_extref();
private:
void populate_sig_list (Sig_List &, int , ACE_Message_Block *);
int read_line (ACE_HANDLE src, ACE_Message_Block **buf);
ACE_CString name_;
Sig_List imports_;
Sig_List exports_;
int extrefs_;
};
#endif /* _OBJ_MODULE_H_ */
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