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//= llvm/Support/Win32/ThreadLocal.inc - Win32 Thread Local Data -*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the Win32 specific (non-pthread) ThreadLocal class.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only generic Win32 code that
//=== is guaranteed to work on *all* Win32 variants.
//===----------------------------------------------------------------------===//
#include "WindowsSupport.h"
#include "llvm/Support/ThreadLocal.h"
namespace llvm {
sys::ThreadLocalImpl::ThreadLocalImpl() : data() {
static_assert(sizeof(DWORD) <= sizeof(data), "size too big");
DWORD* tls = reinterpret_cast<DWORD*>(&data);
*tls = TlsAlloc();
assert(*tls != TLS_OUT_OF_INDEXES);
}
sys::ThreadLocalImpl::~ThreadLocalImpl() {
DWORD* tls = reinterpret_cast<DWORD*>(&data);
TlsFree(*tls);
}
void *sys::ThreadLocalImpl::getInstance() {
DWORD* tls = reinterpret_cast<DWORD*>(&data);
return TlsGetValue(*tls);
}
void sys::ThreadLocalImpl::setInstance(const void* d){
DWORD* tls = reinterpret_cast<DWORD*>(&data);
int errorcode = TlsSetValue(*tls, const_cast<void*>(d));
assert(errorcode != 0);
(void)errorcode;
}
void sys::ThreadLocalImpl::removeInstance() {
setInstance(0);
}
}
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