| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "__cxxabi_config.h" |
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| 10 | #include "cxxabi.h" |
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| 11 | |
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| 12 | // Tell the implementation that we're building the actual implementation |
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| 13 | // (and not testing it) |
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| 14 | #define BUILDING_CXA_GUARD |
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| 15 | #include "cxa_guard_impl.h" |
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| 16 | |
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| 17 | /* |
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| 18 | This implementation must be careful to not call code external to this file |
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| 19 | which will turn around and try to call __cxa_guard_acquire reentrantly. |
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| 20 | For this reason, the headers of this file are as restricted as possible. |
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| 21 | Previous implementations of this code for __APPLE__ have used |
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| 22 | std::__libcpp_mutex_lock and the abort_message utility without problem. This |
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| 23 | implementation also uses std::__libcpp_condvar_wait which has tested |
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| 24 | to not be a problem. |
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| 25 | */ |
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| 26 | |
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| 27 | namespace __cxxabiv1 { |
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| 28 | |
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| 29 | #if defined(_LIBCXXABI_GUARD_ABI_ARM) |
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| 30 | using guard_type = uint32_t; |
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| 31 | #else |
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| 32 | using guard_type = uint64_t; |
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| 33 | #endif |
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| 34 | |
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| 35 | extern "C" |
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| 36 | { |
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| 37 | _LIBCXXABI_FUNC_VIS int __cxa_guard_acquire(guard_type* raw_guard_object) { |
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| 38 | SelectedImplementation imp(raw_guard_object); |
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| 39 | return static_cast<int>(imp.cxa_guard_acquire()); |
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| 40 | } |
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| 41 | |
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| 42 | _LIBCXXABI_FUNC_VIS void __cxa_guard_release(guard_type *raw_guard_object) { |
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| 43 | SelectedImplementation imp(raw_guard_object); |
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| 44 | imp.cxa_guard_release(); |
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| 45 | } |
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| 46 | |
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| 47 | _LIBCXXABI_FUNC_VIS void __cxa_guard_abort(guard_type *raw_guard_object) { |
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| 48 | SelectedImplementation imp(raw_guard_object); |
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| 49 | imp.cxa_guard_abort(); |
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| 50 | } |
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| 51 | } // extern "C" |
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| 52 | |
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| 53 | } // __cxxabiv1 |
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| 54 | |
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