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/*****************************************************************************
* *
* PrimeSense PSCommon Library *
* Copyright (C) 2012 PrimeSense Ltd. *
* *
* This file is part of PSCommon. *
* *
* Licensed under the Apache License, Version 2.0 (the "License"); *
* you may not use this file except in compliance with the License. *
* You may obtain a copy of the License at *
* *
* http://www.apache.org/licenses/LICENSE-2.0 *
* *
* Unless required by applicable law or agreed to in writing, software *
* distributed under the License is distributed on an "AS IS" BASIS, *
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
* See the License for the specific language governing permissions and *
* limitations under the License. *
* *
*****************************************************************************/
#include <XnLib.h>
#include <XnLog.h>
//---------------------------------------------------------------------------
// Code
//---------------------------------------------------------------------------
XN_C_API XnStatus xnOSLoadLibrary(const XnChar* cpFileName, XN_LIB_HANDLE* pLibHandle)
{
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(cpFileName);
XN_VALIDATE_OUTPUT_PTR(pLibHandle);
// Load the requested shared library via the OS.
// NOTE1: set error mode before, because otherwise, if a dependency DLL is missing, Windows will pop a message box
// NOTE2: load DLL using full path name, otherwise behavior with ALTERED_SEARCH_PATH is undefined
DWORD prevMode = SetErrorMode(SEM_FAILCRITICALERRORS);
XnChar strFileName[XN_FILE_MAX_PATH];
GetFullPathName(cpFileName, XN_FILE_MAX_PATH, strFileName, NULL);
*pLibHandle = LoadLibraryEx(strFileName, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
SetErrorMode(prevMode);
// Make sure it succeeded (return value is not NULL). If not return an error....
if (*pLibHandle == NULL)
{
xnLogWarning(XN_MASK_OS, "Failed to load library '%s'. Error code: %d", cpFileName, GetLastError());
return (XN_STATUS_OS_CANT_LOAD_LIB);
}
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSFreeLibrary(const XN_LIB_HANDLE LibHandle)
{
// Make sure the actual shared library handle isn't NULL
// XN_RET_IF_NULL(LibHandle, XN_STATUS_OS_INVALID_LIBRARY);
if (LibHandle == NULL) return XN_STATUS_ERROR;
// Free the shared library via the OS and make sure it succeeded
if (FreeLibrary(LibHandle) != TRUE)
{
return (XN_STATUS_OS_CANT_FREE_LIB);
}
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSGetProcAddress(const XN_LIB_HANDLE LibHandle, const XnChar* cpProcName, XnFarProc* pProcAddr)
{
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(cpProcName);
XN_VALIDATE_OUTPUT_PTR(pProcAddr);
// Make sure the actual shared library handle isn't NULL
XN_RET_IF_NULL(LibHandle, XN_STATUS_OS_INVALID_LIBRARY);
// Get the requested procedure address from the shared library via the OS
*pProcAddr = GetProcAddress(LibHandle, cpProcName);
// Make sure it succeeded (return value is not NULL). If not return an error....
XN_VALIDATE_PTR(*pProcAddr, XN_STATUS_OS_PROC_NOT_FOUND);
// All is good...
return (XN_STATUS_OK);
}
XN_C_API XnStatus xnOSGetModulePathForProcAddress(void* procAddr, XnChar *strModulePath)
{
HMODULE hModule;
BOOL rc = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS, (LPCSTR)procAddr, &hModule);
if (!rc)
{
return XN_STATUS_ERROR;
}
DWORD len = GetModuleFileName(hModule, strModulePath, XN_FILE_MAX_PATH);
if (len == 0)
{
return XN_STATUS_ERROR;
}
return XN_STATUS_OK;
}
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