Add support for const thread locals.

llvm-svn: 74226

llvm/include/llvm/System/ThreadLocal.h

@@ -24,8 +24,8 @@ namespace llvm {
     public:
       ThreadLocalImpl();
       virtual ~ThreadLocalImpl();
-      void setInstance(void* d);
-      void* getInstance();
+      void setInstance(const void* d);
+      const void* getInstance();
     };
     
     template<class T>

llvm/lib/System/ThreadLocal.cpp

@@ -25,8 +25,8 @@ namespace llvm {
 using namespace sys;
 ThreadLocalImpl::ThreadLocalImpl() { }
 ThreadLocalImpl::~ThreadLocalImpl() { }
-void ThreadLocalImpl::setInstance(void* d) { data = d; }
-void* ThreadLocalImpl::getInstance() { return data; }
+void ThreadLocalImpl::setInstance(const void* d) { data = const_cast<void*>(d);}
+const void* ThreadLocalImpl::getInstance() { return data; }
 }
 #else
 
@@ -53,13 +53,13 @@ ThreadLocalImpl::~ThreadLocalImpl() {
   delete key;
 }
 
-void ThreadLocalImpl::setInstance(void* d) {
+void ThreadLocalImpl::setInstance(const void* d) {
   pthread_key_t* key = static_cast<pthread_key_t*>(data);
   int errorcode = pthread_setspecific(*key, d);
   assert(errorcode == 0);
 }
 
-void* ThreadLocalImpl::getInstance() {
+const void* ThreadLocalImpl::getInstance() {
   pthread_key_t* key = static_cast<pthread_key_t*>(data);
   return pthread_getspecific(*key);
 }

llvm/lib/System/Win32/ThreadLocal.inc

@@ -35,12 +35,12 @@ ThreadLocalImpl::~ThreadLocalImpl() {
   delete tls;
 }
 
-void* ThreadLocalImpl::getInstance() {
+const void* ThreadLocalImpl::getInstance() {
   DWORD* tls = static_cast<DWORD*>(data);
   return TlsGetValue(*tls);
 }
 
-void ThreadLocalImpl::setInstance(void* d){
+void ThreadLocalImpl::setInstance(const void* d){
   DWORD* tls = static_cast<DWORD*>(data);
   int errorcode = TlsSetValue(*tls, d);
   assert(errorcode == 0);