gecko-dev/xpcom/components/xcDll.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/* Dll
*
* Programmatic representation of a dll. Stores modifiedTime and size for
* easy detection of change in dll.
*
* dp Suresh <dp@netscape.com>
*/
#include "prio.h"
#include "prlink.h"
#include "nsISupports.h"
#ifndef xcDll_h__
#define xcDll_h__
class nsIFileSpec;
class nsIModule;
class nsIServiceManager;
typedef enum nsDllStatus
{
DLL_OK = 0,
DLL_NO_MEM = 1,
DLL_STAT_ERROR = 2,
DLL_NOT_FILE = 3,
DLL_INVALID_PARAM = 4
} nsDllStatus;
class nsDll
{
private:
char *m_dllName; // Mac only. Stores the dllName to load.
nsIFileSpec *m_dllSpec; // Filespec representing the component
PRUint32 m_modDate; // last modified time at creation of this object
PRUint32 m_size; // size of the dynamic library at creation of this object
PRLibrary *m_instance; // Load instance
nsDllStatus m_status; // holds current status
nsIModule *m_moduleObject;
// Cache frequent queries
char *m_persistentDescriptor;
char *m_nativePath;
PRBool m_markForUnload;
char *m_registryLocation;
void Init(nsIFileSpec *dllSpec);
void Init(const char *persistentDescriptor);
public:
nsDll(nsIFileSpec *dllSpec, const char *registryLocation);
nsDll(nsIFileSpec *dllSpec, const char *registryLocation, PRUint32 modDate, PRUint32 fileSize);
nsDll(const char *persistentDescriptor);
nsDll(const char *persistentDescriptor, PRUint32 modDate, PRUint32 fileSize);
nsDll(const char *dll, int type /* dummy */);
~nsDll(void);
// Sync : Causes update of file information
nsresult Sync(void);
// Status checking on operations completed
nsDllStatus GetStatus(void) { return (m_status); }
// Dll Loading
PRBool Load(void);
PRBool Unload(void);
PRBool IsLoaded(void)
{
return ((m_instance != 0) ? PR_TRUE : PR_FALSE);
}
void MarkForUnload(PRBool mark) { m_markForUnload = mark; }
PRBool IsMarkedForUnload(void) { return m_markForUnload; }
// Shutdown the dll. This will call any on unload hook for the dll.
// This wont unload the dll. Unload() implicitly calls Shutdown().
nsresult Shutdown(void);
void *FindSymbol(const char *symbol);
PRBool HasChanged(void);
// WARNING: DONT FREE string returned.
const char *GetNativePath(void);
// WARNING: DONT FREE string returned.
const char *GetPersistentDescriptorString(void);
PRUint32 GetLastModifiedTime(void) { return(m_modDate); }
PRUint32 GetSize(void) { return(m_size); }
PRLibrary *GetInstance(void) { return (m_instance); }
// NS_RELEASE() is required to be done on objects returned
nsresult GetDllSpec(nsIFileSpec **dllSpec);
nsresult GetModule(nsISupports *servMgr, nsIModule **mobj);
};
#endif /* xcDll_h__ */