d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Correctly implemenet atomic_swap_long for mips64.

Browse Source 
MIPS64 has 64-bit longs, so use uint64_t for it, otherwise uint32_t.
sizeof(long) == sizeof(ptr) for all platforms, so define
atomic_swap_ptr in terms of atomic_swap_long.

Submitted by: hps@
This commit is contained in:
Warner Losh 2018-12-13 00:42:26 +00:00
parent 2d5e81fbd0
commit a1128e850e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=342022
1 changed files with 16 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
sys/mips/include/atomic.h
View File

@ -793,6 +793,20 @@ atomic_swap_64(volatile uint64_t *ptr, const uint64_t value)
}
#endif
#ifdef __mips_n64
static __inline unsigned long
atomic_swap_long(volatile unsigned long *ptr, const unsigned long value)
{
unsigned long retval;
retval = *ptr;
while (!atomic_fcmpset_64((volatile uint64_t *)ptr,
(uint64_t *)&retval, value))
;
return (retval);
}
#else
static __inline unsigned long
atomic_swap_long(volatile unsigned long *ptr, const unsigned long value)
{
@ -805,18 +819,7 @@ atomic_swap_long(volatile unsigned long *ptr, const unsigned long value)
;
return (retval);
}
static __inline uintptr_t
atomic_swap_ptr(volatile uintptr_t *ptr, const uintptr_t value)
{
uintptr_t retval;
retval = *ptr;
while (!atomic_fcmpset_32((volatile uint32_t *)ptr,
(uint32_t *)&retval, value))
;
return (retval);
}
#endif
#define atomic_swap_ptr(ptr, value) atomic_swap_long((unsigned long *)(ptr), value)
#endif /* ! _MACHINE_ATOMIC_H_ */