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// =================================================================================================
// ADOBE SYSTEMS INCORPORATED
// Copyright 2011 Adobe Systems Incorporated
// All Rights Reserved
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// =================================================================================================
#include "ModuleUtils.h"
#include "source/UnicodeConversions.hpp"
#include "source/XIO.hpp"
#include <iostream>
#include <map>
#include <limits>
#include <dlfcn.h>
#include <errno.h>
namespace XMP_PLUGIN
{
// global map of loaded modules (handle, full path)
typedef std::map<OS_ModuleRef, std::string> ModuleRefToPathMap;
static ModuleRefToPathMap sMapModuleRefToPath;
//typedef std::map<void*, std::string> ResourceFileToPathMap;
typedef std::map<OS_ModuleRef, std::string> ResourceFileToPathMap;
static ResourceFileToPathMap sMapResourceFileToPath;
static XMP_ReadWriteLock sMapModuleRWLock;
typedef std::tr1::shared_ptr<int> FilePtr;
static std::string GetModulePath( OS_ModuleRef inOSModule );
/** ************************************************************************************************************************
** CloseFile()
*/
void CloseFile(
int* inFilePtr)
{
close(*inFilePtr);
delete inFilePtr;
}
/** ************************************************************************************************************************
** OpenResourceFile()
*/
static FilePtr OpenResourceFile(
OS_ModuleRef inOSModule,
const std::string& inResourceName,
const std::string& inResourceType)
{
// It is assumed, that all resources reside in a folder with
// the same name as the shared object plus '.resources' extension
std::string path( GetModulePath(inOSModule) );
XMP_StringPtr extPos = path.c_str() + path.size();
for ( ; (extPos != path.c_str()) && (*extPos != '.'); --extPos ) {}
path.erase( extPos - path.c_str() ); // Remove extension
path += ".resources";
path += kDirChar;
path += inResourceName + "." + inResourceType;
FilePtr file;
if( Host_IO::GetFileMode(path.c_str()) == Host_IO::kFMode_IsFile )
{
int fileRef = ::open( path.c_str(), O_RDONLY );
if (fileRef != -1)
{
file.reset(new int(fileRef), CloseFile);
}
}
return file;
}
OS_ModuleRef LoadModule( const std::string & inModulePath, bool inOnlyResourceAccess)
{
OS_ModuleRef result = NULL;
if( inOnlyResourceAccess )
{
int fileHandle = open(reinterpret_cast<const char*>(inModulePath.c_str()), O_RDONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if( !fileHandle )
{
std::cerr << "Cannot open library for resource access: " << strerror(errno) << std::endl;
}
else
{ // success !
result = (void*) fileHandle;
ResourceFileToPathMap::const_iterator iter = sMapResourceFileToPath.find(result);
if (iter == sMapResourceFileToPath.end())
{
// not found, so insert
sMapResourceFileToPath.insert(std::make_pair(result, inModulePath));
}
}
}
else
{
result = dlopen(reinterpret_cast<const char*>(inModulePath.c_str()), RTLD_LAZY/*RTLD_NOW*/);
if( !result )
{
std::cerr << "Cannot open library: " << dlerror() << std::endl;
}
else
{ // success !
XMP_AutoLock writeLock ( &sMapModuleRWLock, kXMP_WriteLock );
ModuleRefToPathMap::const_iterator iter = sMapModuleRefToPath.find(result);
if( iter == sMapModuleRefToPath.end() )
{
// not found, so insert
sMapModuleRefToPath.insert(std::make_pair(result, inModulePath));
}
}
}
return result;
}
void UnloadModule( OS_ModuleRef inModule, bool inOnlyResourceAccess )
{
if( inModule != NULL )
{
// we bluntly assume, that only one instance of the same library is loaded ad therefore added to the global map !
if( inOnlyResourceAccess )
{
ResourceFileToPathMap::iterator iter = sMapResourceFileToPath.find(inModule);
if( iter != sMapResourceFileToPath.end() )
{
close((long) inModule);
sMapResourceFileToPath.erase(iter);
}
else
{
XMP_Throw("OS_Utils_Linux::UnloadModule called with invalid module handle", kXMPErr_InternalFailure);
}
}
else
{
XMP_AutoLock writeLock ( &sMapModuleRWLock, kXMP_WriteLock );
ModuleRefToPathMap::iterator iter = sMapModuleRefToPath.find(inModule);
if( iter != sMapModuleRefToPath.end() )
{
dlclose(inModule);
sMapModuleRefToPath.erase(iter);
}
else
{
XMP_Throw("OS_Utils_Linux::UnloadModule called with invalid module handle", kXMPErr_InternalFailure);
}
}
}
}
/** ************************************************************************************************************************
** GetModulePath()
*/
static std::string GetModulePath(
OS_ModuleRef inOSModule)
{
std::string result;
if( inOSModule != NULL )
{
ModuleRefToPathMap::const_iterator iter;
{
XMP_AutoLock readLock ( &sMapModuleRWLock, kXMP_ReadLock );
iter = sMapModuleRefToPath.find(inOSModule);
}
ResourceFileToPathMap::const_iterator iter2 = sMapResourceFileToPath.find(inOSModule);
if( (iter != sMapModuleRefToPath.end()) && (iter2 != sMapResourceFileToPath.end()) )
{
XMP_Throw("OS_Utils_Linux::GetModulePath: Module handle is present in both global maps", kXMPErr_InternalFailure);
}
if (iter != sMapModuleRefToPath.end())
{
result = iter->second;
}
else if (iter2 != sMapResourceFileToPath.end())
{
result = iter2->second;
}
else
{
XMP_Throw("OS_Utils_Linux::GetModulePath: Failed to find inOSModule in global map !", kXMPErr_InternalFailure);
}
}
return result;
}
void* GetFunctionPointerFromModuleImpl( OS_ModuleRef inOSModule, const char* inSymbol )
{
void* proc = NULL;
if( inOSModule != NULL )
{
proc = dlsym(inOSModule, inSymbol);
if( !proc )
{
std::cerr << "Cannot get function " << inSymbol << " : " << dlerror() << std::endl;
}
}
return proc;
}
bool GetResourceDataFromModule(
OS_ModuleRef inOSModule,
const std::string & inResourceName,
const std::string & inResourceType,
std::string & outBuffer)
{
bool success = false;
FilePtr file = OpenResourceFile( inOSModule, inResourceName, inResourceType );
if( file )
{
ssize_t size = 0;
ssize_t file_size = ::lseek(*file.get(), 0, SEEK_END);
// presumingly we don't want to load more than 2GByte at once (!)
if( file_size < std::numeric_limits<XMP_Int32>::max() )
{
size = file_size;
if( size > 0 )
{
outBuffer.resize(size);
::lseek(*file.get(), 0, SEEK_SET);
ssize_t bytesRead = ::read( *file.get(), (unsigned char*)&outBuffer[0], size );
success = bytesRead == size;
}
}
}
return success;
}
} //namespace XMP_PLUGIN
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