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Per-CPU Reference Counter

include/sync/percpu_rc.h View source View on GitHub

Structs

Section titled “Structs”

percpu_rc

Section titled “percpu_rc”
struct percpu_rc {
    _Atomic int64_t       count;
    _Atomic uintptr_t     percpu_count_ptr;
    percpu_rc_release_fn  release;
    bool                  allow_reinit;
    struct rcu_cb         rcu;
};

Enums

Section titled “Enums”

percpu_rc_flags

Section titled “percpu_rc_flags”
enum percpu_rc_flags {
    PERCPU_RC_INIT_ATOMIC = 1 << 0,
    PERCPU_RC_ALLOW_REINIT = 1 << 1,
};

Type Aliases

Section titled “Type Aliases”

percpu_rc_release_fn

Section titled “percpu_rc_release_fn”
typedef void (*percpu_rc_release_fn)(struct percpu_rc * *);

Functions

Section titled “Functions”

percpu_rc_init

Section titled “percpu_rc_init”
int percpu_rc_init(struct percpu_rc *ref, percpu_rc_release_fn release, enum percpu_rc_flags flags);

percpu_rc_destroy

Section titled “percpu_rc_destroy”
void percpu_rc_destroy(struct percpu_rc *ref);

percpu_rc_kill

Section titled “percpu_rc_kill”
void percpu_rc_kill(struct percpu_rc *ref);

percpu_rc_reinit

Section titled “percpu_rc_reinit”
void percpu_rc_reinit(struct percpu_rc *ref);

percpu_rc_resurrect

Section titled “percpu_rc_resurrect”
void percpu_rc_resurrect(struct percpu_rc *ref);

percpu_rc_read

Section titled “percpu_rc_read”
int64_t percpu_rc_read(struct percpu_rc *ref);

percpu_rc_is_percpu

Section titled “percpu_rc_is_percpu”
bool percpu_rc_is_percpu(uintptr_t pcpu);

percpu_rc_get

Section titled “percpu_rc_get”
void percpu_rc_get(struct percpu_rc *ref);

percpu_rc_put

Section titled “percpu_rc_put”
void percpu_rc_put(struct percpu_rc *ref);

percpu_rc_tryget

Section titled “percpu_rc_tryget”
bool percpu_rc_tryget(struct percpu_rc *ref);

percpu_rc_tryget_live

Section titled “percpu_rc_tryget_live”
bool percpu_rc_tryget_live(struct percpu_rc *ref);

percpu_rc_is_zero

Section titled “percpu_rc_is_zero”
bool percpu_rc_is_zero(struct percpu_rc *ref);

percpu_rc_is_dying

Section titled “percpu_rc_is_dying”
bool percpu_rc_is_dying(struct percpu_rc *ref);

Macros

Section titled “Macros”

PERCPU_COUNT_BIAS

Section titled “PERCPU_COUNT_BIAS”
#define PERCPU_COUNT_BIAS (1LL << 30)

PERCPU_RC_DEAD

Section titled “PERCPU_RC_DEAD”
#define PERCPU_RC_DEAD (1UL << 0)

PERCPU_RC_ATOMIC

Section titled “PERCPU_RC_ATOMIC”
#define PERCPU_RC_ATOMIC (1UL << 1)

PERCPU_RC_PTR_MASK

Section titled “PERCPU_RC_PTR_MASK”
#define PERCPU_RC_PTR_MASK (~(PERCPU_RC_DEAD | PERCPU_RC_ATOMIC))

PERCPU_RC_PTR

Section titled “PERCPU_RC_PTR”
#define PERCPU_RC_PTR(m) (int64_t *) (m & PERCPU_RC_PTR_MASK)