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/****************************************************************************
**
** Copyright (C) 1993-2009 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//==============================================================================
// Includes
//==============================================================================
#include "SystemPrefix.h"
#include "Qt3DSDLLManager.h"
#include "Qt3DSBasicPluginDLL.h"
#include <QDebug>
#ifdef _LINUXPLATFORM
#include <dlfcn.h>
#endif
using namespace Q3DStudio;
//==============================================================================
/**
* Comparator for DLL instances.
* Compares by plugin type and handle
*/
namespace Q3DStudio {
bool operator==(const _SDLLInfo &inInfo1, const _SDLLInfo &inInfo2)
{
return (inInfo1.m_Type == inInfo2.m_Type) && (inInfo1.m_Handle == inInfo2.m_Handle);
}
}
//==============================================================================
/**
* Singleton getter
*/
CDLLManager &CDLLManager::GetDLLManager()
{
static CDLLManager theDLLManager = CDLLManager();
return theDLLManager;
}
//==============================================================================
/**
* CTOR
*/
CDLLManager::CDLLManager()
{
}
//==============================================================================
/**
* DTOR
*/
CDLLManager::~CDLLManager()
{
}
//==============================================================================
/**
* Cleanup
*/
void CDLLManager::Cleanup()
{
m_LoadedLibraries.Clear(true);
}
//==============================================================================
/**
* Loads a DLL/shared library given a path to the library plugin and the plugin
* type to expect.
*/
long CDLLManager::LoadLibrary(const char *inLibraryPath, long inPluginType)
{
long theEmptyIndex = NVARRAY_NOTFOUND;
#ifdef _PCPLATFORM
DLLHANDLE theHandle = ::LoadLibraryA(inLibraryPath);
#endif
#ifdef _LINUXPLATFORM
DLLHANDLE theHandle = ::dlopen(inLibraryPath, RTLD_NOW);
if (!theHandle) {
const char *error = ::dlerror();
qWarning() << "Failed to load shared library, error:" << QStringLiteral("%1, full path: %2").arg(error).arg(inLibraryPath);
}
#endif
#ifdef _INTEGRITYPLATFORM
DLLHANDLE theHandle = 0;
qWarning() << "CDLLManager::LoadLibrary handle is zero!";
#endif
Q3DStudio_ASSERT(theHandle);
if (theHandle != NULL) {
SDLLInfo theInfo;
PROC_GetPluginType theProc =
reinterpret_cast<PROC_GetPluginType>(GetProc("GetPluginType", theHandle));
Q3DStudio_ASSERT(theProc);
if (theProc) {
theInfo.m_Type = theProc();
if (theInfo.m_Type == inPluginType) {
theEmptyIndex = m_LoadedLibraries.GetIndex(theInfo);
theInfo.m_Handle = theHandle;
if (theEmptyIndex == NVARRAY_NOTFOUND) {
m_LoadedLibraries.Push(theInfo);
theEmptyIndex = m_LoadedLibraries.GetCount() - 1;
} else
m_LoadedLibraries[theEmptyIndex] = theInfo;
}
}
if (theEmptyIndex == NVARRAY_NOTFOUND) {
#ifdef _PCPLATFORM
::FreeLibrary(theHandle);
#endif
#ifdef _LINUXPLATFORM
::dlclose(theHandle);
#endif
}
}
return theEmptyIndex;
}
//==============================================================================
/**
* Unloads a DLL given a handle
*/
void CDLLManager::UnloadLibrary(const long inHandle)
{
if (inHandle >= 0 && inHandle < m_LoadedLibraries.GetCount()) {
#ifdef _PCPLATFORM
::FreeLibrary(m_LoadedLibraries[inHandle].m_Handle);
#endif
#ifdef _LINUXPLATFORM
::dlclose(m_LoadedLibraries[inHandle].m_Handle);
#endif
m_LoadedLibraries[inHandle] = SDLLInfo();
}
}
//==============================================================================
/**
* Retrieves a DLL proc given the proc name
*/
void *CDLLManager::GetProc(const char *inProcName, long inHandle)
{
if (inHandle >= 0 && inHandle < m_LoadedLibraries.GetCount())
return GetProc(inProcName, m_LoadedLibraries[inHandle].m_Handle);
return NULL;
}
//==============================================================================
/**
* Retrieves a DLL proc fiven the proc name
*/
void *CDLLManager::GetProc(const char *inProcName, const DLLHANDLE inHandle)
{
#ifdef _PCPLATFORM
#ifdef QT3DS_VC
return ::GetProcAddress(inHandle, inProcName);
#else
return (void *)(::GetProcAddress(inHandle, inProcName));
#endif
#endif
#ifdef _LINUXPLATFORM
return ::dlsym(inHandle, inProcName);
#endif
#ifdef _INTEGRITYPLATFORM
qWarning() << "CDLLManager::GetProc returns NULL!";
return NULL;
#endif
}
//==============================================================================
/**
* Retrieves the plugin type for the DLL
*/
template <typename EEnumType>
EEnumType CDLLManager::GetPluginType(long inHandle)
{
if (inHandle >= 0 && inHandle < m_LoadedLibraries.GetCount())
return static_cast<EEnumType>(m_LoadedLibraries[inHandle].m_Type);
return 0;
}
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