89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-04-27 peterfan Add copyright header.
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*/
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#include <rthw.h>
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#include <stdint.h>
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#include <stdbool.h>
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/*
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* override gcc builtin atomic function for std::atomic<int64_t>, std::atomic<uint64_t>
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* @see https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html
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*/
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uint64_t __atomic_load_8(volatile void *ptr, int memorder)
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{
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volatile uint64_t *val_ptr = (volatile uint64_t *)ptr;
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rt_base_t level;
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uint64_t tmp;
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level = rt_hw_interrupt_disable();
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tmp = *val_ptr;
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rt_hw_interrupt_enable(level);
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return tmp;
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}
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void __atomic_store_8(volatile void *ptr, uint64_t val, int memorder)
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{
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volatile uint64_t *val_ptr = (volatile uint64_t *)ptr;
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rt_base_t level;
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level = rt_hw_interrupt_disable();
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*val_ptr = val;
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rt_hw_interrupt_enable(level);
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}
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uint64_t __atomic_exchange_8(volatile void *ptr, uint64_t val, int memorder)
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{
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volatile uint64_t *val_ptr = (volatile uint64_t *)ptr;
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rt_base_t level;
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uint64_t tmp;
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level = rt_hw_interrupt_disable();
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tmp = *val_ptr;
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*val_ptr = val;
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rt_hw_interrupt_enable(level);
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return tmp;
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}
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bool __atomic_compare_exchange_8(volatile void *ptr, volatile void *expected, uint64_t desired, bool weak, int success_memorder, int failure_memorder)
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{
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volatile uint64_t *val_ptr = (volatile uint64_t *)ptr;
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volatile uint64_t *expected_ptr = (volatile uint64_t *)expected;
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rt_base_t level;
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bool exchanged;
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level = rt_hw_interrupt_disable();
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if (*val_ptr == *expected_ptr)
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{
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*val_ptr = desired;
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exchanged = true;
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}
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else
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{
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*expected_ptr = *val_ptr;
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exchanged = false;
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}
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rt_hw_interrupt_enable(level);
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return exchanged;
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}
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#define __atomic_fetch_op_8(OPNAME, OP) \
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uint64_t __atomic_fetch_##OPNAME##_8(volatile void *ptr, uint64_t val, int memorder) {\
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volatile uint64_t* val_ptr = (volatile uint64_t*)ptr;\
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rt_base_t level;\
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uint64_t tmp;\
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level = rt_hw_interrupt_disable();\
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tmp = *val_ptr;\
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*val_ptr OP##= val;\
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rt_hw_interrupt_enable(level);\
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return tmp;\
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}
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__atomic_fetch_op_8(add, +)
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__atomic_fetch_op_8(sub, -)
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__atomic_fetch_op_8( and, &)
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__atomic_fetch_op_8( or, |)
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__atomic_fetch_op_8(xor, ^)
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