diff options
Diffstat (limited to 'lib/libspl/asm-generic/atomic.c')
| -rw-r--r-- | lib/libspl/asm-generic/atomic.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/lib/libspl/asm-generic/atomic.c b/lib/libspl/asm-generic/atomic.c index de4430f9f..a3223eadc 100644 --- a/lib/libspl/asm-generic/atomic.c +++ b/lib/libspl/asm-generic/atomic.c @@ -103,6 +103,31 @@ void atomic_add_ptr(volatile void *target, ssize_t bits) } +#define ATOMIC_SUB(name, type1, type2) \ + void atomic_sub_##name(volatile type1 *target, type2 bits) \ + { \ + VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \ + *target -= bits; \ + VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \ + } + +ATOMIC_SUB(8, uint8_t, int8_t) +ATOMIC_SUB(char, uchar_t, signed char) +ATOMIC_SUB(16, uint16_t, int16_t) +ATOMIC_SUB(short, ushort_t, short) +ATOMIC_SUB(32, uint32_t, int32_t) +ATOMIC_SUB(int, uint_t, int) +ATOMIC_SUB(long, ulong_t, long) +ATOMIC_SUB(64, uint64_t, int64_t) + +void atomic_sub_ptr(volatile void *target, ssize_t bits) +{ + VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); + *(caddr_t *)target -= bits; + VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); +} + + #define ATOMIC_OR(name, type) \ void atomic_or_##name(volatile type *target, type bits) \ { \ @@ -216,6 +241,37 @@ void *atomic_add_ptr_nv(volatile void *target, ssize_t bits) } +#define ATOMIC_SUB_NV(name, type1, type2) \ + type1 atomic_sub_##name##_nv(volatile type1 *target, type2 bits)\ + { \ + type1 rc; \ + VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); \ + rc = (*target -= bits); \ + VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); \ + return rc; \ + } + +ATOMIC_SUB_NV(8, uint8_t, int8_t) +ATOMIC_SUB_NV(char, uchar_t, signed char) +ATOMIC_SUB_NV(16, uint16_t, int16_t) +ATOMIC_SUB_NV(short, ushort_t, short) +ATOMIC_SUB_NV(32, uint32_t, int32_t) +ATOMIC_SUB_NV(int, uint_t, int) +ATOMIC_SUB_NV(long, ulong_t, long) +ATOMIC_SUB_NV(64, uint64_t, int64_t) + +void *atomic_sub_ptr_nv(volatile void *target, ssize_t bits) +{ + void *ptr; + + VERIFY3S(pthread_mutex_lock(&atomic_lock), ==, 0); + ptr = (*(caddr_t *)target -= bits); + VERIFY3S(pthread_mutex_unlock(&atomic_lock), ==, 0); + + return ptr; +} + + #define ATOMIC_OR_NV(name, type) \ type atomic_or_##name##_nv(volatile type *target, type bits) \ { \ |