From 3ad39e9878310e5317ee73c9b353c1e2c1c5c4ee Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Sat, 11 Jul 2026 22:48:30 +0800
Subject: lib: establish Zircon libc++ and KTL foundation

---
 third_party/libcxx/include/c++/v1/stop_token | 61 ++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 third_party/libcxx/include/c++/v1/stop_token

(limited to 'third_party/libcxx/include/c++/v1/stop_token')

diff --git a/third_party/libcxx/include/c++/v1/stop_token b/third_party/libcxx/include/c++/v1/stop_token
new file mode 100644
index 0000000..0572682
--- /dev/null
+++ b/third_party/libcxx/include/c++/v1/stop_token
@@ -0,0 +1,61 @@
+// -*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_STOP_TOKEN
+#define _LIBCPP_STOP_TOKEN
+
+/*
+
+namespace std {
+  // [stoptoken], class stop_token
+  class stop_token;
+
+  // [stopsource], class stop_source
+  class stop_source;
+
+  // no-shared-stop-state indicator
+  struct nostopstate_t {
+    explicit nostopstate_t() = default;
+  };
+  inline constexpr nostopstate_t nostopstate{};
+
+  // [stopcallback], class template stop_callback
+  template<class Callback>
+    class stop_callback;
+
+*/
+
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/__config>
+#else
+#  include <__config>
+
+#  if _LIBCPP_HAS_THREADS
+
+#    if _LIBCPP_STD_VER >= 20
+#      include <__stop_token/stop_callback.h>
+#      include <__stop_token/stop_source.h>
+#      include <__stop_token/stop_token.h>
+#    endif
+
+#    include <version>
+
+#    if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#      pragma GCC system_header
+#    endif
+
+#  endif // _LIBCPP_HAS_THREADS
+
+#  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
+#    include <cstddef>
+#    include <iosfwd>
+#  endif
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+
+#endif // _LIBCPP_STOP_TOKEN
-- 
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