1 files changed, 43 insertions, 0 deletions
diff --git a/llvm/lib/Support/Unix/ThreadLocal.inc b/llvm/lib/Support/Unix/ThreadLocal.inc
index fa746a628e3..31c3f3835b2 100644
--- a/llvm/lib/Support/Unix/ThreadLocal.inc
+++ b/llvm/lib/Support/Unix/ThreadLocal.inc
@@ -16,6 +16,48 @@
 //===          is guaranteed to work on *all* UNIX variants.
 //===----------------------------------------------------------------------===//
 
+#if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_GETSPECIFIC)
+
+#include <cassert>
+#include <pthread.h>
+#include <stdlib.h>
+
+namespace llvm {
+using namespace sys;
+
+ThreadLocalImpl::ThreadLocalImpl() : data() {
+  static_assert(sizeof(pthread_key_t) <= sizeof(data), "size too big");
+  pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);
+  int errorcode = pthread_key_create(key, nullptr);
+  assert(errorcode == 0);
+  (void) errorcode;
+}
+
+ThreadLocalImpl::~ThreadLocalImpl() {
+  pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);
+  int errorcode = pthread_key_delete(*key);
+  assert(errorcode == 0);
+  (void) errorcode;
+}
+
+void ThreadLocalImpl::setInstance(const void* d) {
+  pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);
+  int errorcode = pthread_setspecific(*key, d);
+  assert(errorcode == 0);
+  (void) errorcode;
+}
+
+void *ThreadLocalImpl::getInstance() {
+  pthread_key_t* key = reinterpret_cast<pthread_key_t*>(&data);
+  return pthread_getspecific(*key);
+}
+
+void ThreadLocalImpl::removeInstance() {
+  setInstance(nullptr);
+}
+
+}
+#else
 namespace llvm {
 using namespace sys;
 ThreadLocalImpl::ThreadLocalImpl() : data() { }
@@ -24,3 +66,4 @@ void ThreadLocalImpl::setInstance(const void* d) { data = const_cast<void*>(d);}
 void *ThreadLocalImpl::getInstance() { return data; }
 void ThreadLocalImpl::removeInstance() { setInstance(0); }
 }
+#endif