Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
183
include/asm-ia64/atomic.h
Normal file
183
include/asm-ia64/atomic.h
Normal file
@@ -0,0 +1,183 @@
|
||||
#ifndef _ASM_IA64_ATOMIC_H
|
||||
#define _ASM_IA64_ATOMIC_H
|
||||
|
||||
/*
|
||||
* Atomic operations that C can't guarantee us. Useful for
|
||||
* resource counting etc..
|
||||
*
|
||||
* NOTE: don't mess with the types below! The "unsigned long" and
|
||||
* "int" types were carefully placed so as to ensure proper operation
|
||||
* of the macros.
|
||||
*
|
||||
* Copyright (C) 1998, 1999, 2002-2003 Hewlett-Packard Co
|
||||
* David Mosberger-Tang <davidm@hpl.hp.com>
|
||||
*/
|
||||
#include <linux/types.h>
|
||||
|
||||
#include <asm/intrinsics.h>
|
||||
|
||||
/*
|
||||
* On IA-64, counter must always be volatile to ensure that that the
|
||||
* memory accesses are ordered.
|
||||
*/
|
||||
typedef struct { volatile __s32 counter; } atomic_t;
|
||||
typedef struct { volatile __s64 counter; } atomic64_t;
|
||||
|
||||
#define ATOMIC_INIT(i) ((atomic_t) { (i) })
|
||||
#define ATOMIC64_INIT(i) ((atomic64_t) { (i) })
|
||||
|
||||
#define atomic_read(v) ((v)->counter)
|
||||
#define atomic64_read(v) ((v)->counter)
|
||||
|
||||
#define atomic_set(v,i) (((v)->counter) = (i))
|
||||
#define atomic64_set(v,i) (((v)->counter) = (i))
|
||||
|
||||
static __inline__ int
|
||||
ia64_atomic_add (int i, atomic_t *v)
|
||||
{
|
||||
__s32 old, new;
|
||||
CMPXCHG_BUGCHECK_DECL
|
||||
|
||||
do {
|
||||
CMPXCHG_BUGCHECK(v);
|
||||
old = atomic_read(v);
|
||||
new = old + i;
|
||||
} while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic_t)) != old);
|
||||
return new;
|
||||
}
|
||||
|
||||
static __inline__ int
|
||||
ia64_atomic64_add (__s64 i, atomic64_t *v)
|
||||
{
|
||||
__s64 old, new;
|
||||
CMPXCHG_BUGCHECK_DECL
|
||||
|
||||
do {
|
||||
CMPXCHG_BUGCHECK(v);
|
||||
old = atomic_read(v);
|
||||
new = old + i;
|
||||
} while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old);
|
||||
return new;
|
||||
}
|
||||
|
||||
static __inline__ int
|
||||
ia64_atomic_sub (int i, atomic_t *v)
|
||||
{
|
||||
__s32 old, new;
|
||||
CMPXCHG_BUGCHECK_DECL
|
||||
|
||||
do {
|
||||
CMPXCHG_BUGCHECK(v);
|
||||
old = atomic_read(v);
|
||||
new = old - i;
|
||||
} while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic_t)) != old);
|
||||
return new;
|
||||
}
|
||||
|
||||
static __inline__ int
|
||||
ia64_atomic64_sub (__s64 i, atomic64_t *v)
|
||||
{
|
||||
__s64 old, new;
|
||||
CMPXCHG_BUGCHECK_DECL
|
||||
|
||||
do {
|
||||
CMPXCHG_BUGCHECK(v);
|
||||
old = atomic_read(v);
|
||||
new = old - i;
|
||||
} while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old);
|
||||
return new;
|
||||
}
|
||||
|
||||
#define atomic_add_return(i,v) \
|
||||
({ \
|
||||
int __ia64_aar_i = (i); \
|
||||
(__builtin_constant_p(i) \
|
||||
&& ( (__ia64_aar_i == 1) || (__ia64_aar_i == 4) \
|
||||
|| (__ia64_aar_i == 8) || (__ia64_aar_i == 16) \
|
||||
|| (__ia64_aar_i == -1) || (__ia64_aar_i == -4) \
|
||||
|| (__ia64_aar_i == -8) || (__ia64_aar_i == -16))) \
|
||||
? ia64_fetch_and_add(__ia64_aar_i, &(v)->counter) \
|
||||
: ia64_atomic_add(__ia64_aar_i, v); \
|
||||
})
|
||||
|
||||
#define atomic64_add_return(i,v) \
|
||||
({ \
|
||||
long __ia64_aar_i = (i); \
|
||||
(__builtin_constant_p(i) \
|
||||
&& ( (__ia64_aar_i == 1) || (__ia64_aar_i == 4) \
|
||||
|| (__ia64_aar_i == 8) || (__ia64_aar_i == 16) \
|
||||
|| (__ia64_aar_i == -1) || (__ia64_aar_i == -4) \
|
||||
|| (__ia64_aar_i == -8) || (__ia64_aar_i == -16))) \
|
||||
? ia64_fetch_and_add(__ia64_aar_i, &(v)->counter) \
|
||||
: ia64_atomic64_add(__ia64_aar_i, v); \
|
||||
})
|
||||
|
||||
/*
|
||||
* Atomically add I to V and return TRUE if the resulting value is
|
||||
* negative.
|
||||
*/
|
||||
static __inline__ int
|
||||
atomic_add_negative (int i, atomic_t *v)
|
||||
{
|
||||
return atomic_add_return(i, v) < 0;
|
||||
}
|
||||
|
||||
static __inline__ int
|
||||
atomic64_add_negative (__s64 i, atomic64_t *v)
|
||||
{
|
||||
return atomic64_add_return(i, v) < 0;
|
||||
}
|
||||
|
||||
#define atomic_sub_return(i,v) \
|
||||
({ \
|
||||
int __ia64_asr_i = (i); \
|
||||
(__builtin_constant_p(i) \
|
||||
&& ( (__ia64_asr_i == 1) || (__ia64_asr_i == 4) \
|
||||
|| (__ia64_asr_i == 8) || (__ia64_asr_i == 16) \
|
||||
|| (__ia64_asr_i == -1) || (__ia64_asr_i == -4) \
|
||||
|| (__ia64_asr_i == -8) || (__ia64_asr_i == -16))) \
|
||||
? ia64_fetch_and_add(-__ia64_asr_i, &(v)->counter) \
|
||||
: ia64_atomic_sub(__ia64_asr_i, v); \
|
||||
})
|
||||
|
||||
#define atomic64_sub_return(i,v) \
|
||||
({ \
|
||||
long __ia64_asr_i = (i); \
|
||||
(__builtin_constant_p(i) \
|
||||
&& ( (__ia64_asr_i == 1) || (__ia64_asr_i == 4) \
|
||||
|| (__ia64_asr_i == 8) || (__ia64_asr_i == 16) \
|
||||
|| (__ia64_asr_i == -1) || (__ia64_asr_i == -4) \
|
||||
|| (__ia64_asr_i == -8) || (__ia64_asr_i == -16))) \
|
||||
? ia64_fetch_and_add(-__ia64_asr_i, &(v)->counter) \
|
||||
: ia64_atomic64_sub(__ia64_asr_i, v); \
|
||||
})
|
||||
|
||||
#define atomic_dec_return(v) atomic_sub_return(1, (v))
|
||||
#define atomic_inc_return(v) atomic_add_return(1, (v))
|
||||
#define atomic64_dec_return(v) atomic64_sub_return(1, (v))
|
||||
#define atomic64_inc_return(v) atomic64_add_return(1, (v))
|
||||
|
||||
#define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0)
|
||||
#define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0)
|
||||
#define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0)
|
||||
#define atomic64_sub_and_test(i,v) (atomic64_sub_return((i), (v)) == 0)
|
||||
#define atomic64_dec_and_test(v) (atomic64_sub_return(1, (v)) == 0)
|
||||
#define atomic64_inc_and_test(v) (atomic64_add_return(1, (v)) == 0)
|
||||
|
||||
#define atomic_add(i,v) atomic_add_return((i), (v))
|
||||
#define atomic_sub(i,v) atomic_sub_return((i), (v))
|
||||
#define atomic_inc(v) atomic_add(1, (v))
|
||||
#define atomic_dec(v) atomic_sub(1, (v))
|
||||
|
||||
#define atomic64_add(i,v) atomic64_add_return((i), (v))
|
||||
#define atomic64_sub(i,v) atomic64_sub_return((i), (v))
|
||||
#define atomic64_inc(v) atomic64_add(1, (v))
|
||||
#define atomic64_dec(v) atomic64_sub(1, (v))
|
||||
|
||||
/* Atomic operations are already serializing */
|
||||
#define smp_mb__before_atomic_dec() barrier()
|
||||
#define smp_mb__after_atomic_dec() barrier()
|
||||
#define smp_mb__before_atomic_inc() barrier()
|
||||
#define smp_mb__after_atomic_inc() barrier()
|
||||
|
||||
#endif /* _ASM_IA64_ATOMIC_H */
|
||||
Reference in New Issue
Block a user