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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. *
* *
*****************************************************************************/
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include <XnOS.h>
#include <dlfcn.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);
#ifndef XN_PLATFORM_ANDROID_OS
// Resolve the file name to the absolute path. This is necessary because
// we need to get the absolute path of this library by dladdr() later.
// Note dladdr() seems to return the path specified to dlopen() "as it is".
XnChar* strAbsoluteFileName = realpath(cpFileName, NULL);
if (strAbsoluteFileName == NULL)
{
// error
xnLogWarning(XN_MASK_OS, "Failed to get absolute path for lib: %s\n", cpFileName);
return XN_STATUS_OS_CANT_LOAD_LIB;
}
// Load the requested shared library via the OS
*pLibHandle = dlopen(strAbsoluteFileName, RTLD_NOW);
free(strAbsoluteFileName); // Don't forget to free the memory allocated by realpath().
#else
*pLibHandle = dlopen(cpFileName, RTLD_NOW);
#endif
// Make sure it succeeded (return value is not NULL). If not return an error....
if (*pLibHandle == NULL)
{
xnLogWarning(XN_MASK_OS, "Failed loading lib: %s\n", dlerror());
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);
// Free the shared library via the OS and make sure it succeeded
if (dlclose(LibHandle) != 0)
{
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 = (XnFarProc)dlsym(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)
{
Dl_info info;
if (!dladdr(procAddr, &info))
{
xnLogWarning(XN_MASK_OS, "Failed to get the dl info: %s\n", dlerror());
return XN_STATUS_ERROR;
}
return xnOSStrCopy(strModulePath, info.dli_fname, XN_FILE_MAX_PATH);
}
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