cmpxchg.h File Reference

Go to the source code of this file.

Macros
#define	xchg(ptr, x)
#define	cmpxchg(ptr, o, n)
#define	tas(ptr)   (xchg((ptr), 1))

Functions
unsigned long	__xchg_called_with_bad_pointer (void)
unsigned long	__cmpxchg_called_with_bad_pointer (void)

Macro Definition Documentation

#define cmpxchg	(		ptr,
			o,
			n
	)

Value:

({                              \
        typeof(*(ptr)) __x;                 \
        switch (sizeof(*(ptr))) {               \
        case 4:                         \
            __x = (typeof(__x))(typeof(__x-__x))atomic_cmpxchg( \
                (atomic_t *)(ptr),          \
                (u32)(typeof((o)-(o)))(o),      \
                (u32)(typeof((n)-(n)))(n));     \
            break;                      \
        case 8:                         \
            __x = (typeof(__x))(typeof(__x-__x))atomic64_cmpxchg( \
                (atomic64_t *)(ptr),            \
                (u64)(typeof((o)-(o)))(o),      \
                (u64)(typeof((n)-(n)))(n));     \
            break;                      \
        default:                        \
            __cmpxchg_called_with_bad_pointer();        \
        }                           \
        __x;                            \
    })

Definition at line 47 of file cmpxchg.h.

#define tas

(

ptr

)

(xchg((ptr), 1))

Definition at line 69 of file cmpxchg.h.

#define xchg	(		ptr,
			x
	)

Value:

({                              \
        typeof(*(ptr)) __x;                 \
        switch (sizeof(*(ptr))) {               \
        case 4:                         \
            __x = (typeof(__x))(typeof(__x-__x))atomic_xchg( \
                (atomic_t *)(ptr),          \
                (u32)(typeof((x)-(x)))(x));     \
            break;                      \
        case 8:                         \
            __x = (typeof(__x))(typeof(__x-__x))atomic64_xchg( \
                (atomic64_t *)(ptr),            \
                (u64)(typeof((x)-(x)))(x));     \
            break;                      \
        default:                        \
            __xchg_called_with_bad_pointer();       \
        }                           \
        __x;                            \
    })

Definition at line 27 of file cmpxchg.h.

Function Documentation

unsigned long __cmpxchg_called_with_bad_pointer

(

void

)

unsigned long __xchg_called_with_bad_pointer

(

void

)