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#include "slang-shared-library.h"
#include "../../slang-com-ptr.h"
#include "slang-io.h"
#include "slang-string-util.h"
#if defined(_WIN32)
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#elif defined(__linux__)
#include <dlfcn.h>
#endif
#include <sys/stat.h>
#include <sys/types.h>
#ifndef WIN32
# include <unistd.h>
#endif
namespace Slang
{
// Allocate static const storage for the various interface IDs that the Slang API needs to expose
static const Guid IID_ISlangUnknown = SLANG_UUID_ISlangUnknown;
static const Guid IID_ISlangSharedLibrary = SLANG_UUID_ISlangSharedLibrary;
static const Guid IID_ISlangSharedLibraryLoader = SLANG_UUID_ISlangSharedLibraryLoader;
/* !!!!!!!!!!!!!!!!!!!!!!!!!! DefaultSharedLibraryLoader !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
/* static */DefaultSharedLibraryLoader DefaultSharedLibraryLoader::s_singleton;
ISlangUnknown* DefaultSharedLibraryLoader::getInterface(const Guid& guid)
{
return (guid == IID_ISlangUnknown || guid == IID_ISlangSharedLibraryLoader) ? static_cast<ISlangSharedLibraryLoader*>(this) : nullptr;
}
SlangResult DefaultSharedLibraryLoader::loadSharedLibrary(const char* path, ISlangSharedLibrary** outSharedLibrary)
{
*outSharedLibrary = nullptr;
// Try loading
SharedLibrary::Handle handle;
SLANG_RETURN_ON_FAIL(SharedLibrary::load(path, handle));
*outSharedLibrary = ComPtr<ISlangSharedLibrary>(new DefaultSharedLibrary(handle)).detach();
return SLANG_OK;
}
SlangResult DefaultSharedLibraryLoader::loadPlatformSharedLibrary(const char* path, ISlangSharedLibrary** outSharedLibrary)
{
*outSharedLibrary = nullptr;
// Try loading
SharedLibrary::Handle handle;
SLANG_RETURN_ON_FAIL(SharedLibrary::loadWithPlatformPath(path, handle));
*outSharedLibrary = ComPtr<ISlangSharedLibrary>(new DefaultSharedLibrary(handle)).detach();
return SLANG_OK;
}
/* static */SlangResult DefaultSharedLibraryLoader::load(ISlangSharedLibraryLoader* loader, const String& path, const String& name, ISlangSharedLibrary** outLibrary)
{
if (path.getLength())
{
String combinedPath = Path::combine(path, name);
return loader->loadSharedLibrary(combinedPath.getBuffer(), outLibrary);
}
else
{
return loader->loadSharedLibrary(name.getBuffer(), outLibrary);
}
}
/* !!!!!!!!!!!!!!!!!!!!!!!!!! DefaultSharedLibrary !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
TemporarySharedLibrary::~TemporarySharedLibrary()
{
if (m_sharedLibraryHandle)
{
// We have to unload if we want to be able to remove
SharedLibrary::unload(m_sharedLibraryHandle);
m_sharedLibraryHandle = nullptr;
}
}
/* !!!!!!!!!!!!!!!!!!!!!!!!!! DefaultSharedLibrary !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
ISlangUnknown* DefaultSharedLibrary::getInterface(const Guid& guid)
{
return (guid == IID_ISlangUnknown || guid == IID_ISlangSharedLibrary) ? static_cast<ISlangSharedLibrary*>(this) : nullptr;
}
DefaultSharedLibrary::~DefaultSharedLibrary()
{
if (m_sharedLibraryHandle)
{
SharedLibrary::unload(m_sharedLibraryHandle);
}
}
void* DefaultSharedLibrary::findSymbolAddressByName(char const* name)
{
return SharedLibrary::findSymbolAddressByName(m_sharedLibraryHandle, name);
}
String SharedLibraryUtils::getSharedLibraryFileName(void* symbolInLib)
{
#if defined(_WIN32)
HMODULE moduleHandle;
GetModuleHandleExA(
GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
(LPCSTR)symbolInLib,
&moduleHandle);
const int maxLength = 1024;
wchar_t filenameBuffer[maxLength];
auto length = GetModuleFileNameW(moduleHandle, filenameBuffer, maxLength);
if (length == maxLength)
{
// Insufficient buffer, return empty.
return String();
}
return String::fromWString(filenameBuffer);
#elif defined(__linux__)
Dl_info dllInfo;
if (!dladdr(symbolInLib, &dllInfo))
{
return String();
}
return dllInfo.dli_fname;
#else
return String();
#endif
}
uint64_t SharedLibraryUtils::getSharedLibraryTimestamp(void* symbolInLib)
{
auto fileName = getSharedLibraryFileName(symbolInLib);
if (fileName.getLength() == 0)
return 0;
struct stat result;
if (stat(fileName.getBuffer(), &result) == 0)
{
auto mod_time = result.st_mtime;
return (uint64_t)mod_time;
}
return 0;
}
}
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