94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
//***************************************************************************
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// libs/libxx/libcxxmini/libxx_cxa_guard.cxx
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//
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// Licensed to the Apache Software Foundation (ASF) under one or more
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// contributor license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright ownership. The
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// ASF licenses this file to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance with the
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// License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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//
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//***************************************************************************
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//***************************************************************************
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// Included Files
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//***************************************************************************
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#include <nuttx/compiler.h>
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//***************************************************************************
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// Pre-processor Definitions
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//***************************************************************************
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//***************************************************************************
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// Private Types
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//***************************************************************************
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#ifdef __ARM_EABI__
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// The 32-bit ARM C++ ABI specifies that the guard is a 32-bit
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// variable and the least significant bit contains 0 prior to
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// initialization, and 1 after.
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typedef int __guard;
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#else
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// The "standard" C++ ABI specifies that the guard is a 64-bit
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// variable and the first byte contains 0 prior to initialization, and
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// 1 after.
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__extension__ typedef int __guard __attribute__((mode(__DI__)));
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#endif
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//***************************************************************************
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// Private Data
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//***************************************************************************
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//***************************************************************************
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// Public Functions
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//***************************************************************************
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extern "C"
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{
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//*************************************************************************
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// Name: __cxa_guard_acquire
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//*************************************************************************
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int __cxa_guard_acquire(FAR __guard *g)
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{
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#ifdef __ARM_EABI__
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return !(*g & 1);
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#else
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return !*(FAR char *)g;
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#endif
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}
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//*************************************************************************
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// Name: __cxa_guard_release
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//*************************************************************************
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void __cxa_guard_release(FAR __guard *g)
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{
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#ifdef __ARM_EABI__
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*g = 1;
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#else
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*(FAR char *)g = 1;
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#endif
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}
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//*************************************************************************
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// Name: __cxa_guard_abort
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//*************************************************************************
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void __cxa_guard_abort(FAR __guard *)
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{
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}
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}
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