sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

libc:machine: add atomic_load/store/exchange API

Browse Source 
Add atomic_load/store/exchange API

Change-Id: I6196b077d1e76cd1e0506ee66e2885e541525eb1
This commit is contained in:
zhuyanlin 2021-08-29 22:51:47 +08:00 committed by Xiang Xiao
parent 60b6199120
commit e01e5f5008
1 changed files with 113 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

113
libs/libc/machine/arch_atomic.c
View File

@ -32,6 +32,47 @@
* Pre-processor Definitions * Pre-processor Definitions
****************************************************************************/ ****************************************************************************/
#define STORE(n, type) \
\
void __atomic_store_ ## n (type *ptr, \
type value, \
int memorder) \
{ \
irqstate_t irqstate = spin_lock_irqsave(NULL); \
\
*ptr = value; \
\
spin_unlock_irqrestore(NULL, irqstate); \
}
#define LOAD(n, type) \
\
type __atomic_load_ ## n (type *ptr, \
int memorder) \
{ \
irqstate_t irqstate = spin_lock_irqsave(NULL); \
\
type ret = *ptr; \
\
spin_unlock_irqrestore(NULL, irqstate); \
return ret; \
}
#define EXCHANGE(n, type) \
\
type __atomic_exchange_ ## n (type *ptr, \
type value, \
int memorder) \
{ \
irqstate_t irqstate = spin_lock_irqsave(NULL); \
\
type ret = *ptr; \
*ptr = value; \
\
spin_unlock_irqrestore(NULL, irqstate); \
return ret; \
}
#define CMP_EXCHANGE(n, type) \ #define CMP_EXCHANGE(n, type) \
\ \
bool __atomic_compare_exchange_ ## n (type *mem, \ bool __atomic_compare_exchange_ ## n (type *mem, \
@ -138,6 +179,78 @@
* Public Functions * Public Functions
****************************************************************************/ ****************************************************************************/
/****************************************************************************
* Name: __atomic_store_1
****************************************************************************/
STORE(1, uint8_t)
/****************************************************************************
* Name: __atomic_store_2
****************************************************************************/
STORE(2, uint16_t)
/****************************************************************************
* Name: __atomic_store_4
****************************************************************************/
STORE(4, uint32_t)
/****************************************************************************
* Name: __atomic_store_8
****************************************************************************/
STORE(8, uint64_t)
/****************************************************************************
* Name: __atomic_load_1
****************************************************************************/
LOAD(1, uint8_t)
/****************************************************************************
* Name: __atomic_load__2
****************************************************************************/
LOAD(2, uint16_t)
/****************************************************************************
* Name: __atomic_load__4
****************************************************************************/
LOAD(4, uint32_t)
/****************************************************************************
* Name: __atomic_load__8
****************************************************************************/
LOAD(8, uint64_t)
/****************************************************************************
* Name: __atomic_exchange_1
****************************************************************************/
EXCHANGE(1, uint8_t)
/****************************************************************************
* Name: __atomic_exchange__2
****************************************************************************/
EXCHANGE(2, uint16_t)
/****************************************************************************
* Name: __atomic_exchange__4
****************************************************************************/
EXCHANGE(4, uint32_t)
/****************************************************************************
* Name: __atomic_exchange__8
****************************************************************************/
EXCHANGE(8, uint64_t)
/**************************************************************************** /****************************************************************************
* Name: __atomic_compare_exchange_1 * Name: __atomic_compare_exchange_1
****************************************************************************/ ****************************************************************************/