mirror of
https://github.com/torvalds/linux.git
synced 2024-11-19 10:31:48 +00:00
x86: Split atomic64_t functions into seperate headers
Split atomic64_t functions out into separate headers, since they will not be practical to merge between 32 and 64 bits. Signed-off-by: Brian Gerst <brgerst@gmail.com> LKML-Reference: <1262883215-4034-2-git-send-email-brgerst@gmail.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Brian Gerst
H. Peter Anvin
parent
7269e8812a
commit
1a3b1d89ed
160
arch/x86/include/asm/atomic64_32.h
Normal file
160
arch/x86/include/asm/atomic64_32.h
Normal file
@ -0,0 +1,160 @@
|
||||
#ifndef _ASM_X86_ATOMIC64_32_H
|
||||
#define _ASM_X86_ATOMIC64_32_H
|
||||
|
||||
#include <linux/compiler.h>
|
||||
#include <linux/types.h>
|
||||
#include <asm/processor.h>
|
||||
//#include <asm/cmpxchg.h>
|
||||
|
||||
/* An 64bit atomic type */
|
||||
|
||||
typedef struct {
|
||||
u64 __aligned(8) counter;
|
||||
} atomic64_t;
|
||||
|
||||
#define ATOMIC64_INIT(val) { (val) }
|
||||
|
||||
extern u64 atomic64_cmpxchg(atomic64_t *ptr, u64 old_val, u64 new_val);
|
||||
|
||||
/**
|
||||
* atomic64_xchg - xchg atomic64 variable
|
||||
* @ptr: pointer to type atomic64_t
|
||||
* @new_val: value to assign
|
||||
*
|
||||
* Atomically xchgs the value of @ptr to @new_val and returns
|
||||
* the old value.
|
||||
*/
|
||||
extern u64 atomic64_xchg(atomic64_t *ptr, u64 new_val);
|
||||
|
||||
/**
|
||||
* atomic64_set - set atomic64 variable
|
||||
* @ptr: pointer to type atomic64_t
|
||||
* @new_val: value to assign
|
||||
*
|
||||
* Atomically sets the value of @ptr to @new_val.
|
||||
*/
|
||||
extern void atomic64_set(atomic64_t *ptr, u64 new_val);
|
||||
|
||||
/**
|
||||
* atomic64_read - read atomic64 variable
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically reads the value of @ptr and returns it.
|
||||
*/
|
||||
static inline u64 atomic64_read(atomic64_t *ptr)
|
||||
{
|
||||
u64 res;
|
||||
|
||||
/*
|
||||
* Note, we inline this atomic64_t primitive because
|
||||
* it only clobbers EAX/EDX and leaves the others
|
||||
* untouched. We also (somewhat subtly) rely on the
|
||||
* fact that cmpxchg8b returns the current 64-bit value
|
||||
* of the memory location we are touching:
|
||||
*/
|
||||
asm volatile(
|
||||
"mov %%ebx, %%eax\n\t"
|
||||
"mov %%ecx, %%edx\n\t"
|
||||
LOCK_PREFIX "cmpxchg8b %1\n"
|
||||
: "=&A" (res)
|
||||
: "m" (*ptr)
|
||||
);
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
extern u64 atomic64_read(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_add_return - add and return
|
||||
* @delta: integer value to add
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @delta to @ptr and returns @delta + *@ptr
|
||||
*/
|
||||
extern u64 atomic64_add_return(u64 delta, atomic64_t *ptr);
|
||||
|
||||
/*
|
||||
* Other variants with different arithmetic operators:
|
||||
*/
|
||||
extern u64 atomic64_sub_return(u64 delta, atomic64_t *ptr);
|
||||
extern u64 atomic64_inc_return(atomic64_t *ptr);
|
||||
extern u64 atomic64_dec_return(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_add - add integer to atomic64 variable
|
||||
* @delta: integer value to add
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @delta to @ptr.
|
||||
*/
|
||||
extern void atomic64_add(u64 delta, atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_sub - subtract the atomic64 variable
|
||||
* @delta: integer value to subtract
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically subtracts @delta from @ptr.
|
||||
*/
|
||||
extern void atomic64_sub(u64 delta, atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_sub_and_test - subtract value from variable and test result
|
||||
* @delta: integer value to subtract
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically subtracts @delta from @ptr and returns
|
||||
* true if the result is zero, or false for all
|
||||
* other cases.
|
||||
*/
|
||||
extern int atomic64_sub_and_test(u64 delta, atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_inc - increment atomic64 variable
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically increments @ptr by 1.
|
||||
*/
|
||||
extern void atomic64_inc(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_dec - decrement atomic64 variable
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically decrements @ptr by 1.
|
||||
*/
|
||||
extern void atomic64_dec(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_dec_and_test - decrement and test
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically decrements @ptr by 1 and
|
||||
* returns true if the result is 0, or false for all other
|
||||
* cases.
|
||||
*/
|
||||
extern int atomic64_dec_and_test(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_inc_and_test - increment and test
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically increments @ptr by 1
|
||||
* and returns true if the result is zero, or false for all
|
||||
* other cases.
|
||||
*/
|
||||
extern int atomic64_inc_and_test(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_add_negative - add and test if negative
|
||||
* @delta: integer value to add
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @delta to @ptr and returns true
|
||||
* if the result is negative, or false when
|
||||
* result is greater than or equal to zero.
|
||||
*/
|
||||
extern int atomic64_add_negative(u64 delta, atomic64_t *ptr);
|
||||
|
||||
#endif /* _ASM_X86_ATOMIC64_32_H */
|
||||
224
arch/x86/include/asm/atomic64_64.h
Normal file
224
arch/x86/include/asm/atomic64_64.h
Normal file
@ -0,0 +1,224 @@
|
||||
#ifndef _ASM_X86_ATOMIC64_64_H
|
||||
#define _ASM_X86_ATOMIC64_64_H
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <asm/alternative.h>
|
||||
#include <asm/cmpxchg.h>
|
||||
|
||||
/* The 64-bit atomic type */
|
||||
|
||||
#define ATOMIC64_INIT(i) { (i) }
|
||||
|
||||
/**
|
||||
* atomic64_read - read atomic64 variable
|
||||
* @v: pointer of type atomic64_t
|
||||
*
|
||||
* Atomically reads the value of @v.
|
||||
* Doesn't imply a read memory barrier.
|
||||
*/
|
||||
static inline long atomic64_read(const atomic64_t *v)
|
||||
{
|
||||
return v->counter;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_set - set atomic64 variable
|
||||
* @v: pointer to type atomic64_t
|
||||
* @i: required value
|
||||
*
|
||||
* Atomically sets the value of @v to @i.
|
||||
*/
|
||||
static inline void atomic64_set(atomic64_t *v, long i)
|
||||
{
|
||||
v->counter = i;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_add - add integer to atomic64 variable
|
||||
* @i: integer value to add
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @i to @v.
|
||||
*/
|
||||
static inline void atomic64_add(long i, atomic64_t *v)
|
||||
{
|
||||
asm volatile(LOCK_PREFIX "addq %1,%0"
|
||||
: "=m" (v->counter)
|
||||
: "er" (i), "m" (v->counter));
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_sub - subtract the atomic64 variable
|
||||
* @i: integer value to subtract
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically subtracts @i from @v.
|
||||
*/
|
||||
static inline void atomic64_sub(long i, atomic64_t *v)
|
||||
{
|
||||
asm volatile(LOCK_PREFIX "subq %1,%0"
|
||||
: "=m" (v->counter)
|
||||
: "er" (i), "m" (v->counter));
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_sub_and_test - subtract value from variable and test result
|
||||
* @i: integer value to subtract
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically subtracts @i from @v and returns
|
||||
* true if the result is zero, or false for all
|
||||
* other cases.
|
||||
*/
|
||||
static inline int atomic64_sub_and_test(long i, atomic64_t *v)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
asm volatile(LOCK_PREFIX "subq %2,%0; sete %1"
|
||||
: "=m" (v->counter), "=qm" (c)
|
||||
: "er" (i), "m" (v->counter) : "memory");
|
||||
return c;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_inc - increment atomic64 variable
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically increments @v by 1.
|
||||
*/
|
||||
static inline void atomic64_inc(atomic64_t *v)
|
||||
{
|
||||
asm volatile(LOCK_PREFIX "incq %0"
|
||||
: "=m" (v->counter)
|
||||
: "m" (v->counter));
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_dec - decrement atomic64 variable
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically decrements @v by 1.
|
||||
*/
|
||||
static inline void atomic64_dec(atomic64_t *v)
|
||||
{
|
||||
asm volatile(LOCK_PREFIX "decq %0"
|
||||
: "=m" (v->counter)
|
||||
: "m" (v->counter));
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_dec_and_test - decrement and test
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically decrements @v by 1 and
|
||||
* returns true if the result is 0, or false for all other
|
||||
* cases.
|
||||
*/
|
||||
static inline int atomic64_dec_and_test(atomic64_t *v)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
asm volatile(LOCK_PREFIX "decq %0; sete %1"
|
||||
: "=m" (v->counter), "=qm" (c)
|
||||
: "m" (v->counter) : "memory");
|
||||
return c != 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_inc_and_test - increment and test
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically increments @v by 1
|
||||
* and returns true if the result is zero, or false for all
|
||||
* other cases.
|
||||
*/
|
||||
static inline int atomic64_inc_and_test(atomic64_t *v)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
asm volatile(LOCK_PREFIX "incq %0; sete %1"
|
||||
: "=m" (v->counter), "=qm" (c)
|
||||
: "m" (v->counter) : "memory");
|
||||
return c != 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_add_negative - add and test if negative
|
||||
* @i: integer value to add
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @i to @v and returns true
|
||||
* if the result is negative, or false when
|
||||
* result is greater than or equal to zero.
|
||||
*/
|
||||
static inline int atomic64_add_negative(long i, atomic64_t *v)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
asm volatile(LOCK_PREFIX "addq %2,%0; sets %1"
|
||||
: "=m" (v->counter), "=qm" (c)
|
||||
: "er" (i), "m" (v->counter) : "memory");
|
||||
return c;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_add_return - add and return
|
||||
* @i: integer value to add
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @i to @v and returns @i + @v
|
||||
*/
|
||||
static inline long atomic64_add_return(long i, atomic64_t *v)
|
||||
{
|
||||
long __i = i;
|
||||
asm volatile(LOCK_PREFIX "xaddq %0, %1;"
|
||||
: "+r" (i), "+m" (v->counter)
|
||||
: : "memory");
|
||||
return i + __i;
|
||||
}
|
||||
|
||||
static inline long atomic64_sub_return(long i, atomic64_t *v)
|
||||
{
|
||||
return atomic64_add_return(-i, v);
|
||||
}
|
||||
|
||||
#define atomic64_inc_return(v) (atomic64_add_return(1, (v)))
|
||||
#define atomic64_dec_return(v) (atomic64_sub_return(1, (v)))
|
||||
|
||||
static inline long atomic64_cmpxchg(atomic64_t *v, long old, long new)
|
||||
{
|
||||
return cmpxchg(&v->counter, old, new);
|
||||
}
|
||||
|
||||
static inline long atomic64_xchg(atomic64_t *v, long new)
|
||||
{
|
||||
return xchg(&v->counter, new);
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_add_unless - add unless the number is a given value
|
||||
* @v: pointer of type atomic64_t
|
||||
* @a: the amount to add to v...
|
||||
* @u: ...unless v is equal to u.
|
||||
*
|
||||
* Atomically adds @a to @v, so long as it was not @u.
|
||||
* Returns non-zero if @v was not @u, and zero otherwise.
|
||||
*/
|
||||
static inline int atomic64_add_unless(atomic64_t *v, long a, long u)
|
||||
{
|
||||
long c, old;
|
||||
c = atomic64_read(v);
|
||||
for (;;) {
|
||||
if (unlikely(c == (u)))
|
||||
break;
|
||||
old = atomic64_cmpxchg((v), c, c + (a));
|
||||
if (likely(old == c))
|
||||
break;
|
||||
c = old;
|
||||
}
|
||||
return c != (u);
|
||||
}
|
||||
|
||||
#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
|
||||
|
||||
#endif /* _ASM_X86_ATOMIC64_64_H */
|
||||
@ -260,156 +260,6 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
|
||||
#define smp_mb__before_atomic_inc() barrier()
|
||||
#define smp_mb__after_atomic_inc() barrier()
|
||||
|
||||
/* An 64bit atomic type */
|
||||
|
||||
typedef struct {
|
||||
u64 __aligned(8) counter;
|
||||
} atomic64_t;
|
||||
|
||||
#define ATOMIC64_INIT(val) { (val) }
|
||||
|
||||
extern u64 atomic64_cmpxchg(atomic64_t *ptr, u64 old_val, u64 new_val);
|
||||
|
||||
/**
|
||||
* atomic64_xchg - xchg atomic64 variable
|
||||
* @ptr: pointer to type atomic64_t
|
||||
* @new_val: value to assign
|
||||
*
|
||||
* Atomically xchgs the value of @ptr to @new_val and returns
|
||||
* the old value.
|
||||
*/
|
||||
extern u64 atomic64_xchg(atomic64_t *ptr, u64 new_val);
|
||||
|
||||
/**
|
||||
* atomic64_set - set atomic64 variable
|
||||
* @ptr: pointer to type atomic64_t
|
||||
* @new_val: value to assign
|
||||
*
|
||||
* Atomically sets the value of @ptr to @new_val.
|
||||
*/
|
||||
extern void atomic64_set(atomic64_t *ptr, u64 new_val);
|
||||
|
||||
/**
|
||||
* atomic64_read - read atomic64 variable
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically reads the value of @ptr and returns it.
|
||||
*/
|
||||
static inline u64 atomic64_read(atomic64_t *ptr)
|
||||
{
|
||||
u64 res;
|
||||
|
||||
/*
|
||||
* Note, we inline this atomic64_t primitive because
|
||||
* it only clobbers EAX/EDX and leaves the others
|
||||
* untouched. We also (somewhat subtly) rely on the
|
||||
* fact that cmpxchg8b returns the current 64-bit value
|
||||
* of the memory location we are touching:
|
||||
*/
|
||||
asm volatile(
|
||||
"mov %%ebx, %%eax\n\t"
|
||||
"mov %%ecx, %%edx\n\t"
|
||||
LOCK_PREFIX "cmpxchg8b %1\n"
|
||||
: "=&A" (res)
|
||||
: "m" (*ptr)
|
||||
);
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
extern u64 atomic64_read(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_add_return - add and return
|
||||
* @delta: integer value to add
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @delta to @ptr and returns @delta + *@ptr
|
||||
*/
|
||||
extern u64 atomic64_add_return(u64 delta, atomic64_t *ptr);
|
||||
|
||||
/*
|
||||
* Other variants with different arithmetic operators:
|
||||
*/
|
||||
extern u64 atomic64_sub_return(u64 delta, atomic64_t *ptr);
|
||||
extern u64 atomic64_inc_return(atomic64_t *ptr);
|
||||
extern u64 atomic64_dec_return(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_add - add integer to atomic64 variable
|
||||
* @delta: integer value to add
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @delta to @ptr.
|
||||
*/
|
||||
extern void atomic64_add(u64 delta, atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_sub - subtract the atomic64 variable
|
||||
* @delta: integer value to subtract
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically subtracts @delta from @ptr.
|
||||
*/
|
||||
extern void atomic64_sub(u64 delta, atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_sub_and_test - subtract value from variable and test result
|
||||
* @delta: integer value to subtract
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically subtracts @delta from @ptr and returns
|
||||
* true if the result is zero, or false for all
|
||||
* other cases.
|
||||
*/
|
||||
extern int atomic64_sub_and_test(u64 delta, atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_inc - increment atomic64 variable
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically increments @ptr by 1.
|
||||
*/
|
||||
extern void atomic64_inc(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_dec - decrement atomic64 variable
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically decrements @ptr by 1.
|
||||
*/
|
||||
extern void atomic64_dec(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_dec_and_test - decrement and test
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically decrements @ptr by 1 and
|
||||
* returns true if the result is 0, or false for all other
|
||||
* cases.
|
||||
*/
|
||||
extern int atomic64_dec_and_test(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_inc_and_test - increment and test
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically increments @ptr by 1
|
||||
* and returns true if the result is zero, or false for all
|
||||
* other cases.
|
||||
*/
|
||||
extern int atomic64_inc_and_test(atomic64_t *ptr);
|
||||
|
||||
/**
|
||||
* atomic64_add_negative - add and test if negative
|
||||
* @delta: integer value to add
|
||||
* @ptr: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @delta to @ptr and returns true
|
||||
* if the result is negative, or false when
|
||||
* result is greater than or equal to zero.
|
||||
*/
|
||||
extern int atomic64_add_negative(u64 delta, atomic64_t *ptr);
|
||||
|
||||
#include <asm/atomic64_32.h>
|
||||
#include <asm-generic/atomic-long.h>
|
||||
#endif /* _ASM_X86_ATOMIC_32_H */
|
||||
|
||||
@ -187,196 +187,6 @@ static inline int atomic_sub_return(int i, atomic_t *v)
|
||||
#define atomic_inc_return(v) (atomic_add_return(1, v))
|
||||
#define atomic_dec_return(v) (atomic_sub_return(1, v))
|
||||
|
||||
/* The 64-bit atomic type */
|
||||
|
||||
#define ATOMIC64_INIT(i) { (i) }
|
||||
|
||||
/**
|
||||
* atomic64_read - read atomic64 variable
|
||||
* @v: pointer of type atomic64_t
|
||||
*
|
||||
* Atomically reads the value of @v.
|
||||
* Doesn't imply a read memory barrier.
|
||||
*/
|
||||
static inline long atomic64_read(const atomic64_t *v)
|
||||
{
|
||||
return v->counter;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_set - set atomic64 variable
|
||||
* @v: pointer to type atomic64_t
|
||||
* @i: required value
|
||||
*
|
||||
* Atomically sets the value of @v to @i.
|
||||
*/
|
||||
static inline void atomic64_set(atomic64_t *v, long i)
|
||||
{
|
||||
v->counter = i;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_add - add integer to atomic64 variable
|
||||
* @i: integer value to add
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @i to @v.
|
||||
*/
|
||||
static inline void atomic64_add(long i, atomic64_t *v)
|
||||
{
|
||||
asm volatile(LOCK_PREFIX "addq %1,%0"
|
||||
: "=m" (v->counter)
|
||||
: "er" (i), "m" (v->counter));
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_sub - subtract the atomic64 variable
|
||||
* @i: integer value to subtract
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically subtracts @i from @v.
|
||||
*/
|
||||
static inline void atomic64_sub(long i, atomic64_t *v)
|
||||
{
|
||||
asm volatile(LOCK_PREFIX "subq %1,%0"
|
||||
: "=m" (v->counter)
|
||||
: "er" (i), "m" (v->counter));
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_sub_and_test - subtract value from variable and test result
|
||||
* @i: integer value to subtract
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically subtracts @i from @v and returns
|
||||
* true if the result is zero, or false for all
|
||||
* other cases.
|
||||
*/
|
||||
static inline int atomic64_sub_and_test(long i, atomic64_t *v)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
asm volatile(LOCK_PREFIX "subq %2,%0; sete %1"
|
||||
: "=m" (v->counter), "=qm" (c)
|
||||
: "er" (i), "m" (v->counter) : "memory");
|
||||
return c;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_inc - increment atomic64 variable
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically increments @v by 1.
|
||||
*/
|
||||
static inline void atomic64_inc(atomic64_t *v)
|
||||
{
|
||||
asm volatile(LOCK_PREFIX "incq %0"
|
||||
: "=m" (v->counter)
|
||||
: "m" (v->counter));
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_dec - decrement atomic64 variable
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically decrements @v by 1.
|
||||
*/
|
||||
static inline void atomic64_dec(atomic64_t *v)
|
||||
{
|
||||
asm volatile(LOCK_PREFIX "decq %0"
|
||||
: "=m" (v->counter)
|
||||
: "m" (v->counter));
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_dec_and_test - decrement and test
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically decrements @v by 1 and
|
||||
* returns true if the result is 0, or false for all other
|
||||
* cases.
|
||||
*/
|
||||
static inline int atomic64_dec_and_test(atomic64_t *v)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
asm volatile(LOCK_PREFIX "decq %0; sete %1"
|
||||
: "=m" (v->counter), "=qm" (c)
|
||||
: "m" (v->counter) : "memory");
|
||||
return c != 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_inc_and_test - increment and test
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically increments @v by 1
|
||||
* and returns true if the result is zero, or false for all
|
||||
* other cases.
|
||||
*/
|
||||
static inline int atomic64_inc_and_test(atomic64_t *v)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
asm volatile(LOCK_PREFIX "incq %0; sete %1"
|
||||
: "=m" (v->counter), "=qm" (c)
|
||||
: "m" (v->counter) : "memory");
|
||||
return c != 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_add_negative - add and test if negative
|
||||
* @i: integer value to add
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @i to @v and returns true
|
||||
* if the result is negative, or false when
|
||||
* result is greater than or equal to zero.
|
||||
*/
|
||||
static inline int atomic64_add_negative(long i, atomic64_t *v)
|
||||
{
|
||||
unsigned char c;
|
||||
|
||||
asm volatile(LOCK_PREFIX "addq %2,%0; sets %1"
|
||||
: "=m" (v->counter), "=qm" (c)
|
||||
: "er" (i), "m" (v->counter) : "memory");
|
||||
return c;
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic64_add_return - add and return
|
||||
* @i: integer value to add
|
||||
* @v: pointer to type atomic64_t
|
||||
*
|
||||
* Atomically adds @i to @v and returns @i + @v
|
||||
*/
|
||||
static inline long atomic64_add_return(long i, atomic64_t *v)
|
||||
{
|
||||
long __i = i;
|
||||
asm volatile(LOCK_PREFIX "xaddq %0, %1;"
|
||||
: "+r" (i), "+m" (v->counter)
|
||||
: : "memory");
|
||||
return i + __i;
|
||||
}
|
||||
|
||||
static inline long atomic64_sub_return(long i, atomic64_t *v)
|
||||
{
|
||||
return atomic64_add_return(-i, v);
|
||||
}
|
||||
|
||||
#define atomic64_inc_return(v) (atomic64_add_return(1, (v)))
|
||||
#define atomic64_dec_return(v) (atomic64_sub_return(1, (v)))
|
||||
|
||||
static inline long atomic64_cmpxchg(atomic64_t *v, long old, long new)
|
||||
{
|
||||
return cmpxchg(&v->counter, old, new);
|
||||
}
|
||||
|
||||
static inline long atomic64_xchg(atomic64_t *v, long new)
|
||||
{
|
||||
return xchg(&v->counter, new);
|
||||
}
|
||||
|
||||
static inline long atomic_cmpxchg(atomic_t *v, int old, int new)
|
||||
{
|
||||
return cmpxchg(&v->counter, old, new);
|
||||
@ -413,30 +223,6 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
|
||||
|
||||
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
|
||||
|
||||
/**
|
||||
* atomic64_add_unless - add unless the number is a given value
|
||||
* @v: pointer of type atomic64_t
|
||||
* @a: the amount to add to v...
|
||||
* @u: ...unless v is equal to u.
|
||||
*
|
||||
* Atomically adds @a to @v, so long as it was not @u.
|
||||
* Returns non-zero if @v was not @u, and zero otherwise.
|
||||
*/
|
||||
static inline int atomic64_add_unless(atomic64_t *v, long a, long u)
|
||||
{
|
||||
long c, old;
|
||||
c = atomic64_read(v);
|
||||
for (;;) {
|
||||
if (unlikely(c == (u)))
|
||||
break;
|
||||
old = atomic64_cmpxchg((v), c, c + (a));
|
||||
if (likely(old == c))
|
||||
break;
|
||||
c = old;
|
||||
}
|
||||
return c != (u);
|
||||
}
|
||||
|
||||
/**
|
||||
* atomic_inc_short - increment of a short integer
|
||||
* @v: pointer to type int
|
||||
@ -463,8 +249,6 @@ static inline void atomic_or_long(unsigned long *v1, unsigned long v2)
|
||||
asm(LOCK_PREFIX "orq %1, %0" : "+m" (*v1) : "r" (v2));
|
||||
}
|
||||
|
||||
#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
|
||||
|
||||
/* These are x86-specific, used by some header files */
|
||||
#define atomic_clear_mask(mask, addr) \
|
||||
asm volatile(LOCK_PREFIX "andl %0,%1" \
|
||||
@ -481,5 +265,6 @@ static inline void atomic_or_long(unsigned long *v1, unsigned long v2)
|
||||
#define smp_mb__before_atomic_inc() barrier()
|
||||
#define smp_mb__after_atomic_inc() barrier()
|
||||
|
||||
#include <asm/atomic64_64.h>
|
||||
#include <asm-generic/atomic-long.h>
|
||||
#endif /* _ASM_X86_ATOMIC_64_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user