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//===-- DynamicLibrary.cpp - Runtime link/load libraries --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Reid Spencer and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This header file implements the operating system DynamicLibrary concept.
//
//===----------------------------------------------------------------------===//
#include "llvm/System/DynamicLibrary.h"
#include "llvm/Config/dlfcn.h"
#include <cassert>
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only TRULY operating system
//=== independent code.
//===----------------------------------------------------------------------===//
#ifdef HAVE_LTDL_H
namespace llvm {
using namespace sys;
#ifdef HAVE_LT_DLOPEN
DynamicLibrary::DynamicLibrary() : handle(0) {
if (0 != lt_dlinit())
throw std::string(lt_dlerror());
handle = lt_dlopen(0);
if (handle == 0)
throw std::string("Can't open program as dynamic library");
}
DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
if (0 != lt_dlinit())
throw std::string(lt_dlerror());
handle = lt_dlopen(filename);
if (handle == 0)
handle = lt_dlopenext(filename);
if (handle == 0)
throw std::string("Can't open dynamic library:") + filename;
}
DynamicLibrary::~DynamicLibrary() {
if (handle)
lt_dlclose((lt_dlhandle)handle);
lt_dlexit();
}
void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
assert(handle != 0 && "Invalid DynamicLibrary handle");
return lt_dlsym((lt_dlhandle) handle,symbolName);
}
#else
DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
assert(!"Have ltdl.h but not libltdl.a!");
}
DynamicLibrary::~DynamicLibrary() {
assert(!"Have ltdl.h but not libltdl.a!");
}
void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
assert(!"Have ltdl.h but not libltdl.a!");
return 0;
}
#endif // HAVE_DLOPEN
} // namespace llvm
#else // HAVE_LTDL_H
#include "platform/DynamicLibrary.cpp"
#endif
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