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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
// Several strong name tools are in a special scenario because they build in the CoreCLR build process, but
// are expected to run against the desktop VM. Because of this, we need to setup the callback structure that
// Utilcode asks for to point to callbacks that shim to the desktop. These methods provide that shimming functionality.
//
#include "common.h"
CoreClrCallbacks *GetCoreClrCallbacks();
//
// Get a pointer to an API out of the shim
//
// Arguments:
// szApiName - name of the API to get a pointer to
//
//
template<typename FunctionPointer>
FunctionPointer ApiShim(LPCSTR szApiName)
{
static FunctionPointer pfnApi = NULL;
if (pfnApi == NULL)
{
CoreClrCallbacks *pCallbacks = GetCoreClrCallbacks();
pfnApi = reinterpret_cast<FunctionPointer>(GetProcAddress(pCallbacks->m_hmodCoreCLR, szApiName));
_ASSERTE(pfnApi != NULL);
}
return pfnApi;
}
//
// Shim APIs, passing off into the desktop VM
//
IExecutionEngine * __stdcall SnIEE()
{
typedef IExecutionEngine * ( __stdcall *IEEFn_t)();
return ApiShim<IEEFn_t>("IEE")();
}
STDAPI SnGetCorSystemDirectory(SString& pbuffer)
{
typedef HRESULT (__stdcall *GetCorSystemDirectoryFn_t)(SString&);
return ApiShim<GetCorSystemDirectoryFn_t>("GetCORSystemDirectory")(pbuffer);
}
//
// Initialize a set of CoreCLR callbacks for utilcode to call into the VM with
//
// Return Value:
// CoreClrCallbacks for UtilCode
//
// Notes:
// Will not return NULL
//
CoreClrCallbacks *GetCoreClrCallbacks()
{
static CoreClrCallbacks coreClrCallbacks = { 0 };
if (coreClrCallbacks.m_hmodCoreCLR == NULL)
{
// Run against the desktop CLR
coreClrCallbacks.m_hmodCoreCLR = WszLoadLibrary(W("mscoree.dll"));
coreClrCallbacks.m_pfnIEE = SnIEE;
coreClrCallbacks.m_pfnGetCORSystemDirectory = SnGetCorSystemDirectory;
coreClrCallbacks.m_pfnGetCLRFunction = NULL;
}
return &coreClrCallbacks;
}
// Initialize Utilcode
//
// Notes:
// Should only be called once
//
void InitUtilcode()
{
#ifdef _DEBUG
static bool fAlreadyInitialized = false;
_ASSERTE(!fAlreadyInitialized);
fAlreadyInitialized = true;
#endif
InitUtilcode(*GetCoreClrCallbacks());
}
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