futex.h File Reference

#include <linux/futex.h>
#include <linux/uaccess.h>
#include <asm/errno.h>

Go to the source code of this file.

Macros
#define	__futex_atomic_op1(insn, ret, oldval, uaddr, oparg)
#define	__futex_atomic_op2(insn, ret, oldval, uaddr, oparg)

Macro Definition Documentation

#define __futex_atomic_op1	(		insn,
			ret,
			oldval,
			uaddr,
			oparg
	)

Value:

do {                                    \
    register unsigned long r8 __asm ("r8") = 0;         \
    __asm__ __volatile__(                       \
        "   mf;;                    \n" \
        "[1:] " insn ";;                \n" \
        "   .xdata4 \"__ex_table\", 1b-., 2f-.  \n" \
        "[2:]"                          \
        : "+r" (r8), "=r" (oldval)              \
        : "r" (uaddr), "r" (oparg)              \
        : "memory");                        \
    ret = r8;                           \
} while (0)

Definition at line 8 of file futex.h.

#define __futex_atomic_op2	(		insn,
			ret,
			oldval,
			uaddr,
			oparg
	)

Value:

do {                                    \
    register unsigned long r8 __asm ("r8") = 0;         \
    int val, newval;                        \
    do {                                \
        __asm__ __volatile__(                   \
            "   mf;;                  \n"   \
            "[1:]   ld4 %3=[%4];;             \n"   \
            "   mov %2=%3             \n"   \
                insn    ";;           \n"   \
            "   mov ar.ccv=%2;;           \n"   \
            "[2:]   cmpxchg4.acq %1=[%4],%3,ar.ccv;;  \n"   \
            "   .xdata4 \"__ex_table\", 1b-., 3f-.\n"   \
            "   .xdata4 \"__ex_table\", 2b-., 3f-.\n"   \
            "[3:]"                      \
            : "+r" (r8), "=r" (val), "=&r" (oldval),    \
               "=&r" (newval)               \
            : "r" (uaddr), "r" (oparg)          \
            : "memory");                    \
        if (unlikely (r8))                  \
            break;                      \
    } while (unlikely (val != oldval));             \
    ret = r8;                           \
} while (0)

Definition at line 22 of file futex.h.