hpux_dll.cpp

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 ***** */ 

#include "dllacces.h"

#include <dl.h>
#include <errno.h>

#include "platform/unix/unix_dll_common.h"

static const char ErrLibNotValid[] = "File not a valid shared library";
static const char ErrNoRoom[] = "Insufficient room in address space";
static const char ErrDoesNotExist[] = "Library does not exist";
static const char ErrNoPermission[] = "Read/Execute permission is denied for lib";
static const char ErrUnknown[] = "Unknown error";
static const char ErrSymbolNotCount[] = "Symbol not found";

class HPUXDLLAccess : public DLLAccessImp
{
public:
    HPUXDLLAccess();
    virtual ~HPUXDLLAccess();
    virtual int Open(const char* dllName);
    virtual int Close() ;
    virtual void* GetSymbol(const char* symbolName);
    virtual const char* GetErrorStr() const;
    virtual char* CreateVersionStr(const char* dllName) const;
    virtual void CreateName(const char* short_name, const char* long_name, 
		      char* out_buf, UINT32& out_buf_len, 
		      UINT32 nMajor, UINT32 nMinor)
		      {
		          UnixCreateName(short_name, long_name, out_buf, out_buf_len,
		          nMajor, nMinor);
		      }

private:
    shl_t m_handle;
    const char* m_pErrorStr;
};

HPUXDLLAccess::HPUXDLLAccess() : 
    m_handle(0)
{}

HPUXDLLAccess::~HPUXDLLAccess()
{
    if (m_handle)
    {
	Close();
    }
}

int HPUXDLLAccess::Open(const char* dllName)
{
    int ret = DLLAccess::NO_LOAD;

    if (m_handle)
    {
	Close();
    }

    m_handle = shl_load(dllName, BIND_DEFERRED, 0L);

    if (m_handle)
    {
	ret = DLLAccess::DLL_OK;
    }
    else
    {
	switch(errno) {
	case ENOEXEC:
	    m_pErrorStr = ErrLibNotValid;
	    break;
	case ENOMEM:
	    m_pErrorStr = ErrNoRoom;
	    break;
	case ENOENT:
	    m_pErrorStr = ErrDoesNotExist;
	    break;
	case EACCES:
	    m_pErrorStr = ErrNoPermission;
	    break;
	default:
	    m_pErrorStr = ErrUnknown;
	    break;
	};
    }

    HandleHXStopOnLoad(dllName);

    return ret;
}

int HPUXDLLAccess::Close()
{
    int ret = DLLAccess::NO_LOAD;

    if (m_handle)
    {
	shl_unload(m_handle);
	m_handle = 0;

	ret = DLLAccess::DLL_OK;
    }

    return ret;
}

void* HPUXDLLAccess::GetSymbol(const char* symbolName)
{
    void* pRet = 0;

    int rc = shl_findsym(&m_handle, symbolName, TYPE_UNDEFINED, &pRet);

    if(rc < 0)
    {
	m_pErrorStr = ErrSymbolNotCount;
	pRet =  0;
    }

    return pRet;
}

const char* HPUXDLLAccess::GetErrorStr() const
{
    return m_pErrorStr;
}

char* HPUXDLLAccess::CreateVersionStr(const char* dllName) const
{
    return UnixFindDLLVersion(dllName);
}

DLLAccessImp* DLLAccess::CreatePlatformDLLImp()
{
    return new HPUXDLLAccess();
}