unix_library.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
 *      
 * The contents of this file, and the files included with this file, are 
 * subject to the current version of the RealNetworks Public Source License 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
 * directly from RealNetworks.  You may not use this file except in 
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
 * RCSL for the rights, obligations and limitations governing use of the 
 * contents of the file.  
 *  
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
 *  
 * This file, and the files included with this file, is distributed and made 
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
 *    http://www.helixcommunity.org/content/tck 
 * 
 * Contributor(s): 
 *  
 * ***** END LICENSE BLOCK ***** */ 

#ifndef __UNIX_LIBRARY_H
#define __UNIX_LIBRARY_H

#include "hxtypes.h"

#define HMODULE ULONG32
#define HINSTANCE ULONG32

// just a large number used to identify bad handles
#define DL_MAX_NUM_LIBS 9000000L
#define DL_BAD_LIB_ID DL_MAX_NUM_LIBS + 1


/* Functions to load & release Shared Libraries */

/////////////////////////////////////////////////////////////////////////////
//
//	Function:
//
//		LoadLibrary()
//
//	Purpose:
//
//		Called to load a Unix Shared Library given the library's name
//
//	Parameters:
//
//		char* dllname
//
//	Return:
//
//		ULONG32
//		Returns a handle to the library which is used to identify which 
//		library is being accessed in subsequent calls to these functions.
//
ULONG32 LoadLibrary(const char* dllname);

/////////////////////////////////////////////////////////////////////////////
//
//	Function:
//
//		FreeLibrary()
//
//	Purpose:
//
//		Called to free a Shared Library. If this is not called the library
//		will be freed when the application quits.
//
//	Parameters:
//
//		HMODULE lib
//		This is an opaque handle identifying the library.
//
//	Return:
//
//		none
//
void FreeLibrary(HMODULE lib);

/////////////////////////////////////////////////////////////////////////////
//
//	Function:
//
//		GetProcAddress()
//
//	Purpose:
//
//		Called to get a function pointer in a Shared Library.
//
//	Parameters:
//
//		HMODULE lib
//
//		char* function
//		The function name
//
//	Return:
//
//		void*
//		The address of the function.
//

void* GetProcAddress(HMODULE lib, char* function);

#if defined RAFreeLibrary
#undef RAFreeLibrary
#endif
#define RAFreeLibrary(x) FreeLibrary(x)

#endif // ifndef