[NaCl SDK] Compile for naclio for Bionic

native_client_sdk/src/libraries/nacl_io/h_errno.c

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "nacl_io/ossocket.h"
+
+#if defined(PROVIDES_SOCKET_API) && !defined(__GLIBC__)
+
+#include <stdlib.h>
+#include <pthread.h>
+
+static pthread_key_t s_h_errno_key;
+static pthread_once_t s_h_errno_once = PTHREAD_ONCE_INIT;
+
+static void __h_errno_create() {
+  pthread_key_create(&s_h_errno_key, NULL);
+}
+
+int *__h_errno_location() {
+  int* h_errno_ptr;
+  pthread_once(&s_h_errno_once, __h_errno_create);
+  h_errno_ptr = (int *) pthread_getspecific(s_h_errno_key);
+
+  if (NULL == h_errno_ptr) {
+    h_errno_ptr = (int *) malloc(sizeof(int));
+    pthread_setspecific(s_h_errno_key, h_errno_ptr);
+    *h_errno_ptr = 0;
+  }
+
+  return h_errno_ptr;
+}
+
+#if defined(__BIONIC__)
+int *__get_h_errno() {
+  return __h_errno_location();
+}
+#endif
+
+#endif  // defined(PROVIDES_SOCKET_API) && !defined(__GLIBC__)