[r4728]: main / trunk / common / platform / unix / SysLibrary.cpp  Maximize  Restore  History

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/*----------------------------------------------------------------------------*/
/* */
/* Copyright (c) 1995, 2004 IBM Corporation. All rights reserved. */
/* Copyright (c) 2005-2009 Rexx Language Association. All rights reserved. */
/* */
/* This program and the accompanying materials are made available under */
/* the terms of the Common Public License v1.0 which accompanies this */
/* distribution. A copy is also available at the following address: */
/* http://www.ibm.com/developerworks/oss/CPLv1.0.htm */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in */
/* the documentation and/or other materials provided with the distribution. */
/* */
/* Neither the name of Rexx Language Association nor the names */
/* of its contributors may be used to endorse or promote products */
/* derived from this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS */
/* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
/* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED */
/* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, */
/* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY */
/* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING */
/* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS */
/* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* */
/*----------------------------------------------------------------------------*/
/******************************************************************************/
/* REXX Shared runtime */
/* */
/* Unix implementation of the SysLibrary */
/* */
/******************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "SysLibrary.hpp"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <dlfcn.h>
#define MAX_LIBRARY_NAME_LENGTH 250
#define LIBARY_NAME_BUFFER_LENGTH (MAX_LIBRARY_NAME_LENGTH + sizeof("/usr/lib/lib") + sizeof(ORX_SHARED_LIBRARY_EXT))
SysLibrary::SysLibrary()
{
libraryHandle = NULL;
}
void * SysLibrary::getProcedure(
const char *name) /* required procedure name */
/******************************************************************************/
/* Function: Resolve a named procedure in a library */
/******************************************************************************/
{
return dlsym(libraryHandle, name);
}
bool SysLibrary::load(
const char *name) /* required library name */
/******************************************************************************/
/* Function: Load a named library, returning success/failure flag */
/******************************************************************************/
{
char nameBuffer[LIBARY_NAME_BUFFER_LENGTH];
if (strlen(name) > MAX_LIBRARY_NAME_LENGTH)
{
return false;
}
sprintf(nameBuffer, "lib%s%s", name, ORX_SHARED_LIBRARY_EXT);
// try loading directly
libraryHandle = dlopen(nameBuffer, RTLD_LAZY);
// if not found, then try from /usr/lib
if (libraryHandle == NULL)
{
sprintf(nameBuffer, "/usr/lib/lib%s%s", name, ORX_SHARED_LIBRARY_EXT);
libraryHandle = dlopen(nameBuffer, RTLD_LAZY);
// still can't find it?
if (libraryHandle == NULL)
{
return false;
}
}
return true; // loaded successfully
}
/**
* Free a loaded library if the library is still loaded.
*
* @return True if we unloaded ok, false otherwise.
*/
bool SysLibrary::unload()
{
if (libraryHandle != NULL)
{
dlclose(libraryHandle);
return true;
}
return false;
}

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