| // Copyright 2013 The Flutter 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 <dispatch/dispatch.h> |
| #include <dlfcn.h> |
| #include <cstdint> |
| |
| #include "flutter/fml/logging.h" |
| |
| // See context in https://github.com/flutter/flutter/issues/132130 and |
| // https://github.com/flutter/engine/pull/44711. |
| |
| // TODO(zanderso): Remove this after Clang 18 rolls into Xcode. |
| // https://github.com/flutter/flutter/issues/133203 |
| |
| namespace { |
| |
| typedef uint32_t dyld_platform_t; |
| |
| typedef struct { |
| dyld_platform_t platform; |
| uint32_t version; |
| } dyld_build_version_t; |
| |
| typedef bool (*AvailabilityVersionCheckFn)(uint32_t count, |
| dyld_build_version_t versions[]); |
| |
| AvailabilityVersionCheckFn AvailabilityVersionCheck; |
| |
| dispatch_once_t DispatchOnceCounter; |
| |
| void InitializeAvailabilityCheck(void* unused) { |
| if (AvailabilityVersionCheck) { |
| return; |
| } |
| AvailabilityVersionCheck = reinterpret_cast<AvailabilityVersionCheckFn>( |
| dlsym(RTLD_DEFAULT, "_availability_version_check")); |
| FML_CHECK(AvailabilityVersionCheck); |
| } |
| |
| extern "C" bool _availability_version_check(uint32_t count, |
| dyld_build_version_t versions[]) { |
| dispatch_once_f(&DispatchOnceCounter, NULL, InitializeAvailabilityCheck); |
| return AvailabilityVersionCheck(count, versions); |
| } |
| |
| } // namespace |
