Serious-Engine/Sources/Engine/Base/Unix/UnixDynamicLoader.cpp

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/* Copyright (c) 2002-2012 Croteam Ltd. All rights reserved. */
/* rcg10072001 Implemented. */
#include <dlfcn.h>
#include <Engine/Engine.h>
#include <Engine/Base/DynamicLoader.h>
class CUnixDynamicLoader : public CDynamicLoader
{
public:
CUnixDynamicLoader(const char *libname);
virtual ~CUnixDynamicLoader(void);
virtual void *FindSymbol(const char *sym);
virtual const char *GetError(void);
protected:
void DoOpen(const char *lib);
void SetError(void);
void *module;
CTString *err;
};
CDynamicLoader *CDynamicLoader::GetInstance(const char *libname)
{
return(new CUnixDynamicLoader(libname));
}
void CUnixDynamicLoader::SetError(void)
{
const char *errmsg = ::dlerror();
delete err;
err = NULL;
if (errmsg != NULL)
{
CPrintF("CUnixDynamicLoader error: %s\n", errmsg);
err = new CTString(errmsg);
}
}
const char *CUnixDynamicLoader::GetError(void)
{
return((err) ? (const char *) (*err) : NULL);
}
void *CUnixDynamicLoader::FindSymbol(const char *sym)
{
//printf("Looking for symbol %s\n", sym);
void *retval = NULL;
if (module != NULL) {
retval = ::dlsym(module, sym);
SetError();
}
return(retval);
}
void CUnixDynamicLoader::DoOpen(const char *lib)
{
module = ::dlopen(lib, RTLD_LAZY | RTLD_GLOBAL);
SetError();
}
CTFileName CDynamicLoader::ConvertLibNameToPlatform(const char *libname)
{
#if PLATFORM_MACOSX
const char *DLLEXTSTR = ".dylib";
#else
const char *DLLEXTSTR = ".so";
#endif
CTFileName fnm = CTString(libname);
CTString libstr((strncmp("lib", fnm.FileName(), 3) == 0) ? "" : "lib");
return(fnm.FileDir() + libstr + fnm.FileName() + DLLEXTSTR);
}
CUnixDynamicLoader::CUnixDynamicLoader(const char *libname)
: module(NULL),
err(NULL)
{
if (libname == NULL) {
DoOpen(NULL);
} else {
CTFileName fnm = ConvertLibNameToPlatform(libname);
// Always try to dlopen from inside the game dirs before trying
// system libraries...
if (fnm.FileDir() == "") {
char buf[MAX_PATH];
_pFileSystem->GetExecutablePath(buf, sizeof (buf));
CTFileName fnmDir = CTString(buf);
fnmDir = fnmDir.FileDir() + fnm;
DoOpen(fnmDir);
if (module != NULL) {
return;
}
}
DoOpen(fnm);
}
}
CUnixDynamicLoader::~CUnixDynamicLoader(void)
{
delete err;
if (module != NULL)
::dlclose(module);
}
// end of UnixDynamicLoader.cpp ...