Release 4.11 arch/x86/include/asm/atomic64_64.h
#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 READ_ONCE((v)->counter);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 17 | 77.27% | 1 | 25.00% |
| Pranith Kumar | 2 | 9.09% | 1 | 25.00% |
| Anton Blanchard | 2 | 9.09% | 1 | 25.00% |
| Peter Zijlstra | 1 | 4.55% | 1 | 25.00% |
| Total | 22 | 100.00% | 4 | 100.00% |
/**
* 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)
{
WRITE_ONCE(v->counter, i);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 19 | 82.61% | 1 | 50.00% |
| Peter Zijlstra | 4 | 17.39% | 1 | 50.00% |
| Total | 23 | 100.00% | 2 | 100.00% |
/**
* atomic64_add - add integer to atomic64 variable
* @i: integer value to add
* @v: pointer to type atomic64_t
*
* Atomically adds @i to @v.
*/
static __always_inline void atomic64_add(long i, atomic64_t *v)
{
asm volatile(LOCK_PREFIX "addq %1,%0"
: "=m" (v->counter)
: "er" (i), "m" (v->counter));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 16 | 94.12% | 1 | 50.00% |
| Hagen Paul Pfeifer | 1 | 5.88% | 1 | 50.00% |
| Total | 17 | 100.00% | 2 | 100.00% |
/**
* 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));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
/**
* 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 bool atomic64_sub_and_test(long i, atomic64_t *v)
{
GEN_BINARY_RMWcc(LOCK_PREFIX "subq", v->counter, "er", i, "%0", e);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Peter Zijlstra | 15 | 46.88% | 1 | 20.00% |
| Brian Gerst | 13 | 40.62% | 1 | 20.00% |
| H. Peter Anvin | 4 | 12.50% | 3 | 60.00% |
| Total | 32 | 100.00% | 5 | 100.00% |
/**
* atomic64_inc - increment atomic64 variable
* @v: pointer to type atomic64_t
*
* Atomically increments @v by 1.
*/
static __always_inline void atomic64_inc(atomic64_t *v)
{
asm volatile(LOCK_PREFIX "incq %0"
: "=m" (v->counter)
: "m" (v->counter));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 13 | 92.86% | 1 | 50.00% |
| Hagen Paul Pfeifer | 1 | 7.14% | 1 | 50.00% |
| Total | 14 | 100.00% | 2 | 100.00% |
/**
* atomic64_dec - decrement atomic64 variable
* @v: pointer to type atomic64_t
*
* Atomically decrements @v by 1.
*/
static __always_inline void atomic64_dec(atomic64_t *v)
{
asm volatile(LOCK_PREFIX "decq %0"
: "=m" (v->counter)
: "m" (v->counter));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 13 | 92.86% | 1 | 50.00% |
| Hagen Paul Pfeifer | 1 | 7.14% | 1 | 50.00% |
| Total | 14 | 100.00% | 2 | 100.00% |
/**
* 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 bool atomic64_dec_and_test(atomic64_t *v)
{
GEN_UNARY_RMWcc(LOCK_PREFIX "decq", v->counter, "%0", e);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Peter Zijlstra | 13 | 52.00% | 1 | 25.00% |
| Brian Gerst | 10 | 40.00% | 1 | 25.00% |
| H. Peter Anvin | 2 | 8.00% | 2 | 50.00% |
| Total | 25 | 100.00% | 4 | 100.00% |
/**
* 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 bool atomic64_inc_and_test(atomic64_t *v)
{
GEN_UNARY_RMWcc(LOCK_PREFIX "incq", v->counter, "%0", e);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Peter Zijlstra | 13 | 52.00% | 1 | 25.00% |
| Brian Gerst | 10 | 40.00% | 1 | 25.00% |
| H. Peter Anvin | 2 | 8.00% | 2 | 50.00% |
| Total | 25 | 100.00% | 4 | 100.00% |
/**
* 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 bool atomic64_add_negative(long i, atomic64_t *v)
{
GEN_BINARY_RMWcc(LOCK_PREFIX "addq", v->counter, "er", i, "%0", s);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Peter Zijlstra | 15 | 46.88% | 1 | 20.00% |
| Brian Gerst | 13 | 40.62% | 1 | 20.00% |
| H. Peter Anvin | 4 | 12.50% | 3 | 60.00% |
| Total | 32 | 100.00% | 5 | 100.00% |
/**
* 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 __always_inline long atomic64_add_return(long i, atomic64_t *v)
{
return i + xadd(&v->counter, i);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 17 | 62.96% | 1 | 33.33% |
| Jeremy Fitzhardinge | 9 | 33.33% | 1 | 33.33% |
| Hagen Paul Pfeifer | 1 | 3.70% | 1 | 33.33% |
| Total | 27 | 100.00% | 3 | 100.00% |
static inline long atomic64_sub_return(long i, atomic64_t *v)
{
return atomic64_add_return(-i, v);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
static inline long atomic64_fetch_add(long i, atomic64_t *v)
{
return xadd(&v->counter, i);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Peter Zijlstra | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
static inline long atomic64_fetch_sub(long i, atomic64_t *v)
{
return xadd(&v->counter, -i);
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Peter Zijlstra | 26 | 100.00% | 1 | 100.00% |
| Total | 26 | 100.00% | 1 | 100.00% |
#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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
static inline long atomic64_xchg(atomic64_t *v, long new)
{
return xchg(&v->counter, new);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 25 | 100.00% | 1 | 100.00% |
| Total | 25 | 100.00% | 1 | 100.00% |
/**
* 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 the old value of @v.
*/
static inline bool 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 85 | 98.84% | 1 | 50.00% |
| H. Peter Anvin | 1 | 1.16% | 1 | 50.00% |
| Total | 86 | 100.00% | 2 | 100.00% |
#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0)
/*
* atomic64_dec_if_positive - decrement by 1 if old value positive
* @v: pointer of type atomic_t
*
* The function returns the old value of *v minus 1, even if
* the atomic variable, v, was not decremented.
*/
static inline long atomic64_dec_if_positive(atomic64_t *v)
{
long c, old, dec;
c = atomic64_read(v);
for (;;) {
dec = c - 1;
if (unlikely(dec < 0))
break;
old = atomic64_cmpxchg((v), c, dec);
if (likely(old == c))
break;
c = old;
}
return dec;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Luca Barbieri | 78 | 100.00% | 1 | 100.00% |
| Total | 78 | 100.00% | 1 | 100.00% |
#define ATOMIC64_OP(op) \
static inline void atomic64_##op(long i, atomic64_t *v) \
{ \
asm volatile(LOCK_PREFIX #op"q %1,%0" \
: "+m" (v->counter) \
: "er" (i) \
: "memory"); \
}
#define ATOMIC64_FETCH_OP(op, c_op) \
static inline long atomic64_fetch_##op(long i, atomic64_t *v) \
{ \
long old, val = atomic64_read(v); \
for (;;) { \
old = atomic64_cmpxchg(v, val, val c_op i); \
if (old == val) \
break; \
val = old; \
} \
return old; \
}
#define ATOMIC64_OPS(op, c_op) \
ATOMIC64_OP(op) \
ATOMIC64_FETCH_OP(op, c_op)
ATOMIC64_OPS(and, &)
ATOMIC64_OPS(or, |)
ATOMIC64_OPS(xor, ^)
#undef ATOMIC64_OPS
#undef ATOMIC64_FETCH_OP
#undef ATOMIC64_OP
#endif /* _ASM_X86_ATOMIC64_64_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Brian Gerst | 379 | 57.77% | 1 | 7.14% |
| Peter Zijlstra | 167 | 25.46% | 4 | 28.57% |
| Luca Barbieri | 79 | 12.04% | 1 | 7.14% |
| H. Peter Anvin | 13 | 1.98% | 3 | 21.43% |
| Jeremy Fitzhardinge | 9 | 1.37% | 1 | 7.14% |
| Hagen Paul Pfeifer | 4 | 0.61% | 1 | 7.14% |
| Pranith Kumar | 2 | 0.30% | 1 | 7.14% |
| Anton Blanchard | 2 | 0.30% | 1 | 7.14% |
| Arun Sharma | 1 | 0.15% | 1 | 7.14% |
| Total | 656 | 100.00% | 14 | 100.00% |
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