//*************************************************************************** // libs/libxx/libcxxmini/libxx_cxa_guard.cxx // // Copyright (C) 2015 Omni Hoverboards Inc. All rights reserved. // Author: Paul Alexander Patience // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions // are met: // // 1. Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // 2. Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in // the documentation and/or other materials provided with the // distribution. // 3. Neither the name NuttX nor the names of its contributors may be // used to endorse or promote products derived from this software // without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE // COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS // OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED // AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN // ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE // POSSIBILITY OF SUCH DAMAGE. // //*************************************************************************** //*************************************************************************** // Included Files //*************************************************************************** #include //*************************************************************************** // Pre-processor Definitions //*************************************************************************** //*************************************************************************** // Private Types //*************************************************************************** #ifdef __ARM_EABI__ // The 32-bit ARM C++ ABI specifies that the guard is a 32-bit // variable and the least significant bit contains 0 prior to // initialization, and 1 after. typedef int __guard; #else // The "standard" C++ ABI specifies that the guard is a 64-bit // variable and the first byte contains 0 prior to initialization, and // 1 after. __extension__ typedef int __guard __attribute__((mode(__DI__))); #endif //*************************************************************************** // Private Data //*************************************************************************** //*************************************************************************** // Public Functions //*************************************************************************** extern "C" { //************************************************************************* // Name: __cxa_guard_acquire //************************************************************************* int __cxa_guard_acquire(FAR __guard *g) { #ifdef __ARM_EABI__ return !(*g & 1); #else return !*(char *)g; #endif } //************************************************************************* // Name: __cxa_guard_release //************************************************************************* void __cxa_guard_release(FAR __guard *g) { #ifdef __ARM_EABI__ *g = 1; #else *(char *)g = 1; #endif } //************************************************************************* // Name: __cxa_guard_abort //************************************************************************* void __cxa_guard_abort(FAR __guard *) { } }