62 lines
1.1 KiB
C++
62 lines
1.1 KiB
C++
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/*
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* \file Atomic.cpp
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* \project EFC_PlatformC28x
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* \date 23 мая 2024 г.
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* \author leonidTitov
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*
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* \brief Создание флага atomic из одной ассемблерной операции (ну ладно, из трёх)
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*/
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#include "Atomic.hpp"
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#ifndef ATOMIC_FLAGS_COUNT
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#define ATOMIC_FLAGS_COUNT 32
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#endif
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extern "C" {
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extern uint16_t _test_and_set_bit_1( volatile uint16_t * p );
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extern void _clear_bit_1( volatile uint16_t * p );
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}
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namespace {
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volatile uint16_t atomic_flags[ATOMIC_FLAGS_COUNT] = {};
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volatile uint16_t * create_flag() {
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for( int i = 0; i < ATOMIC_FLAGS_COUNT; i++ )
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if( not( _test_and_set_bit_1( atomic_flags + i ) ) )
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return &atomic_flags[i];
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while(true);
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}
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void delete_flag( volatile uint16_t * atomic_flag ) {
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_clear_bit_1( atomic_flag );
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}
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}
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/**
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* Create Flag
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*/
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umlib::imp::AtomicFlag::AtomicFlag() : flag( create_flag() ) {
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clear();
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}
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/**
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* Delete Flag
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*/
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umlib::imp::AtomicFlag::~AtomicFlag() {
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delete_flag( flag );
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}
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