auto import from //depot/cupcake/@135843
diff --git a/libcutils/threads.c b/libcutils/threads.c
new file mode 100644
index 0000000..42cc928
--- /dev/null
+++ b/libcutils/threads.c
@@ -0,0 +1,84 @@
+/* libs/cutils/threads.c
+**
+** Copyright (C) 2007, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+#include <cutils/threads.h>
+
+#ifdef HAVE_PTHREADS
+void* thread_store_get( thread_store_t* store )
+{
+ const pthread_key_t k = store->tls;
+
+ if (!store->has_tls)
+ return NULL;
+
+ return pthread_getspecific( store->tls );
+}
+
+extern void thread_store_set( thread_store_t* store,
+ void* value,
+ thread_store_destruct_t destroy)
+{
+ pthread_mutex_lock( &store->lock );
+ if (!store->has_tls) {
+ if (pthread_key_create( &store->tls, destroy) != 0) {
+ pthread_mutex_unlock(&store->lock);
+ return;
+ }
+ store->has_tls = 1;
+ }
+ pthread_mutex_unlock( &store->lock );
+
+ pthread_setspecific( store->tls, value );
+}
+
+#endif
+
+#ifdef HAVE_WIN32_THREADS
+void* thread_store_get( thread_store_t* store )
+{
+ if (!store->has_tls)
+ return NULL;
+
+ return (void*) TlsGetValue( store->tls );
+}
+
+void thread_store_set( thread_store_t* store,
+ void* value,
+ thread_store_destruct_t destroy )
+{
+ /* XXX: can't use destructor on thread exit */
+ if (!store->lock_init) {
+ store->lock_init = -1;
+ InitializeCriticalSection( &store->lock );
+ store->lock_init = -2;
+ } else while (store->lock_init != -2) {
+ Sleep(10); /* 10ms */
+ }
+
+ EnterCriticalSection( &store->lock );
+ if (!store->has_tls) {
+ store->tls = TlsAlloc();
+ if (store->tls == TLS_OUT_OF_INDEXES) {
+ LeaveCriticalSection( &store->lock );
+ return;
+ }
+ store->has_tls = 1;
+ }
+ LeaveCriticalSection( &store->lock );
+
+ TlsSetValue( store->tls, value );
+}
+#endif