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cfe7ae1118
This is required per the non-OS SDK doc, which states: "Using non-OS SDK, please do not call any function defined with ICACHE_FLASH_ATTR in the interrupt handler." This avoids an "Illegal instruction" exception with epc1 pointing at a valid instruction (in flash) for one of the moved methods.
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
/*
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cbuf.cpp - Circular buffer implementation
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Copyright (c) 2014 Ivan Grokhotkov. All rights reserved.
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This file is part of the esp8266 core for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "cbuf.h"
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#include "c_types.h"
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size_t ICACHE_RAM_ATTR cbuf::getSize() const {
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if(_end >= _begin) {
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return _end - _begin;
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}
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return _size - (_begin - _end);
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}
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int ICACHE_RAM_ATTR cbuf::read() {
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if(empty()) return -1;
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char result = *_begin;
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_begin = wrap_if_bufend(_begin + 1);
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return result;
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return static_cast<int>(result);
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}
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size_t ICACHE_RAM_ATTR cbuf::write(char c) {
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if(full()) return 0;
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*_end = c;
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_end = wrap_if_bufend(_end + 1);
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return 1;
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}
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