libc:machine: add common atomic operation.
Add common atomic operation. Change-Id: I9f6b891f1406d54871a3f50c217a1029b434d2e8
This commit is contained in:
zhuyanlin
Gustavo Henrique Nihei
parent
84e9ff085f
commit
3da0bb7829
@ -44,6 +44,10 @@ config ARCH_ROMGETC
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# Default settings for C library functions that may be replaced with
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# architecture-specific versions.
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config LIBC_ARCH_ATOMIC
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bool
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default n
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config LIBC_ARCH_MEMCPY
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bool
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default n
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@ -18,6 +18,10 @@
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#
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############################################################################
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ifeq ($(CONFIG_LIBC_ARCH_ATOMIC),y)
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CSRCS += arch_atomic.c
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endif
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ifeq ($(CONFIG_ARCH_ARM),y)
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include $(TOPDIR)/libs/libc/machine/arm/Make.defs
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endif
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@ -36,3 +40,7 @@ endif
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ifeq ($(CONFIG_ARCH_RENESAS),y)
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include $(TOPDIR)/libs/libc/machine/renesas/Make.defs
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endif
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DEPPATH += --dep-path machine
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VPATH += :machine
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283
libs/libc/machine/arch_atomic.c
Normal file
283
libs/libc/machine/arch_atomic.c
Normal file
@ -0,0 +1,283 @@
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/****************************************************************************
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* libs/libc/machine/arch_atomic.c
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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/config.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <nuttx/spinlock.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define CMP_EXCHANGE(n, type) \
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\
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bool __atomic_compare_exchange_ ## n (type *mem, \
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type *expect, \
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type desired, \
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int success, \
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int failure) \
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{ \
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bool ret = false; \
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irqstate_t irqstate = spin_lock_irqsave(NULL); \
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\
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if (*mem == *expect) \
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{ \
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ret = true; \
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*mem = desired; \
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} \
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else \
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{ \
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*expect = *mem; \
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} \
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\
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spin_unlock_irqrestore(NULL, irqstate); \
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return ret; \
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}
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#define FETCH_ADD(n, type) \
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\
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type __atomic_fetch_add_ ## n (type *ptr, \
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type value, \
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int memorder) \
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{ \
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irqstate_t irqstate = spin_lock_irqsave(NULL); \
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type ret = *ptr; \
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\
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*ptr = *ptr + value; \
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\
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spin_unlock_irqrestore(NULL, irqstate); \
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return ret; \
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}
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#define FETCH_SUB(n, type) \
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\
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type __atomic_fetch_sub_ ## n (type *ptr, \
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type value, \
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int memorder) \
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{ \
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irqstate_t irqstate = spin_lock_irqsave(NULL); \
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type ret = *ptr; \
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\
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*ptr = *ptr - value; \
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\
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spin_unlock_irqrestore(NULL, irqstate); \
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return ret; \
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}
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#define FETCH_AND(n, type) \
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\
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type __atomic_fetch_and_ ## n (type *ptr, \
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type value, \
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int memorder) \
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{ \
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irqstate_t irqstate = spin_lock_irqsave(NULL); \
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type ret = *ptr; \
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\
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*ptr = *ptr & value; \
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\
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spin_unlock_irqrestore(NULL, irqstate); \
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return ret; \
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}
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#define FETCH_OR(n, type) \
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\
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type __atomic_fetch_or_ ## n (type *ptr, \
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type value, \
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int memorder) \
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{ \
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irqstate_t irqstate = spin_lock_irqsave(NULL); \
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type ret = *ptr; \
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\
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*ptr = *ptr | value; \
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\
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spin_unlock_irqrestore(NULL, irqstate); \
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return ret; \
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}
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#define FETCH_XOR(n, type) \
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\
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type __atomic_fetch_xor_ ## n (type *ptr, \
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type value, \
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int memorder) \
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{ \
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irqstate_t irqstate = spin_lock_irqsave(NULL); \
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type ret = *ptr; \
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\
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*ptr = *ptr ^ value; \
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\
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spin_unlock_irqrestore(NULL, irqstate); \
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return ret; \
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}
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#pragma GCC diagnostic ignored "-Wbuiltin-declaration-mismatch"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: __atomic_compare_exchange_1
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****************************************************************************/
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CMP_EXCHANGE(1, uint8_t)
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/****************************************************************************
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* Name: __atomic_compare_exchange_2
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****************************************************************************/
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CMP_EXCHANGE(2, uint16_t)
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/****************************************************************************
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* Name: __atomic_compare_exchange_4
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****************************************************************************/
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CMP_EXCHANGE(4, uint32_t)
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/****************************************************************************
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* Name: __atomic_compare_exchange_8
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****************************************************************************/
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CMP_EXCHANGE(8, uint64_t)
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/****************************************************************************
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* Name: __atomic_fetch_add_1
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****************************************************************************/
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FETCH_ADD(1, uint8_t)
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/****************************************************************************
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* Name: __atomic_fetch_add_2
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****************************************************************************/
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FETCH_ADD(2, uint16_t)
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/****************************************************************************
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* Name: __atomic_fetch_add_4
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****************************************************************************/
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FETCH_ADD(4, uint32_t)
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/****************************************************************************
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* Name: __atomic_fetch_add_8
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****************************************************************************/
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FETCH_ADD(8, uint64_t)
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/****************************************************************************
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* Name: __atomic_fetch_sub_1
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****************************************************************************/
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FETCH_SUB(1, uint8_t)
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/****************************************************************************
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* Name: __atomic_fetch_sub_2
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****************************************************************************/
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FETCH_SUB(2, uint16_t)
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/****************************************************************************
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* Name: __atomic_fetch_sub_4
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****************************************************************************/
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FETCH_SUB(4, uint32_t)
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/****************************************************************************
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* Name: __atomic_fetch_sub_8
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****************************************************************************/
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FETCH_SUB(8, uint64_t)
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/****************************************************************************
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* Name: __atomic_fetch_and_1
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****************************************************************************/
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FETCH_AND(1, uint8_t)
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/****************************************************************************
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* Name: __atomic_fetch_and_2
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****************************************************************************/
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FETCH_AND(2, uint16_t)
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/****************************************************************************
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* Name: __atomic_fetch_and_4
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****************************************************************************/
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FETCH_AND(4, uint32_t)
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/****************************************************************************
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* Name: __atomic_fetch_and_8
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****************************************************************************/
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FETCH_AND(8, uint64_t)
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/****************************************************************************
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* Name: __atomic_fetch_or_1
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****************************************************************************/
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FETCH_OR(1, uint8_t)
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/****************************************************************************
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* Name: __atomic_fetch_or_2
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****************************************************************************/
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FETCH_OR(2, uint16_t)
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/****************************************************************************
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* Name: __atomic_fetch_or_4
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****************************************************************************/
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FETCH_OR(4, uint32_t)
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/****************************************************************************
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* Name: __atomic_fetch_or_4
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****************************************************************************/
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FETCH_OR(8, uint64_t)
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/****************************************************************************
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* Name: __atomic_fetch_xor_1
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****************************************************************************/
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FETCH_XOR(1, uint8_t)
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/****************************************************************************
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* Name: __atomic_fetch_xor_2
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****************************************************************************/
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FETCH_XOR(2, uint16_t)
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/****************************************************************************
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* Name: __atomic_fetch_xor_4
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****************************************************************************/
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FETCH_XOR(4, uint32_t)
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/****************************************************************************
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* Name: __atomic_fetch_xor_8
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****************************************************************************/
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FETCH_XOR(8, uint64_t)
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