cmpxchg.h File Reference

#include <linux/types.h>
#include <asm-generic/cmpxchg-local.h>

Go to the source code of this file.

Macros
#define	xchg(ptr, x)
#define	tas(ptr)   (xchg((ptr), 1))
#define	cmpxchg(ptr, test, new)
#define	cmpxchg_local(ptr, o, n)
#define	cmpxchg64_local(ptr, o, n)   __cmpxchg64_local_generic((ptr), (o), (n))

Functions
uint64_t	__xchg_64 (uint64_t i, volatile void *v)
uint64_t	__cmpxchg_64 (uint64_t test, uint64_t new, volatile uint64_t *v)

Macro Definition Documentation

#define cmpxchg	(		ptr,
			test,
			new
	)

Definition at line 84 of file cmpxchg.h.

#define cmpxchg64_local	(		ptr,
			o,
			n
	)		__cmpxchg64_local_generic((ptr), (o), (n))

Definition at line 170 of file cmpxchg.h.

#define cmpxchg_local	(		ptr,
			o,
			n
	)

Value:

((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \
            (unsigned long)(n), sizeof(*(ptr))))

Definition at line 167 of file cmpxchg.h.

#define tas

(

ptr

)

(xchg((ptr), 1))

Definition at line 72 of file cmpxchg.h.

#define xchg	(		ptr,
			x
	)

Value:

({                                      \
    __typeof__(ptr) __xg_ptr = (ptr);                   \
    __typeof__(*(ptr)) __xg_orig;                       \
                                        \
    switch (sizeof(__xg_orig)) {                        \
    case 4:                                 \
        asm volatile(                           \
            "swap%I0 %M0,%1"                    \
            : "+m"(*__xg_ptr), "=r"(__xg_orig)          \
            : "1"(x)                        \
            : "memory"                      \
            );                          \
        break;                              \
                                        \
    default:                                \
        __xg_orig = (__typeof__(__xg_orig))0;               \
        asm volatile("break");                      \
        break;                              \
    }                                   \
                                        \
    __xg_orig;                              \
})

Definition at line 27 of file cmpxchg.h.

Function Documentation

uint64_t __cmpxchg_64	(	uint64_t	test,
		uint64_t	new,
		volatile uint64_t *	v
	)

uint64_t __xchg_64	(	uint64_t	i,
		volatile void *	v
	)