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1 //===---------------------------- cxa_guard.cpp ---------------------------===//
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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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