#ifndef _KERN_LOCK_GROUP_H
#define _KERN_LOCK_GROUP_H
#include <kern/queue.h>
#include <mach/mach_types.h>
__BEGIN_DECLS
#define LCK_GRP_NULL (lck_grp_t *)NULL
typedef enum lck_type {
LCK_TYPE_SPIN,
LCK_TYPE_MTX,
LCK_TYPE_RW,
LCK_TYPE_TICKET
} lck_type_t;
#if XNU_KERNEL_PRIVATE
#include <kern/startup.h>
#include <os/refcnt.h>
#if LOCK_STATS
#define LCK_GRP_ARG(expr) ,expr
#define LCK_GRP_PROBEARG(grp) grp
#else
#define LCK_GRP_ARG(expr)
#define LCK_GRP_PROBEARG(grp) LCK_GRP_NULL
#endif
typedef struct _lck_grp_stat_ {
uint64_t lgs_count;
uint32_t lgs_enablings;
#if CONFIG_DTRACE
uint32_t lgs_probeid;
uint64_t lgs_limit;
#endif
} lck_grp_stat_t;
typedef struct _lck_grp_stats_ {
#if LOCK_STATS
lck_grp_stat_t lgss_spin_held;
lck_grp_stat_t lgss_spin_miss;
lck_grp_stat_t lgss_spin_spin;
lck_grp_stat_t lgss_ticket_held;
lck_grp_stat_t lgss_ticket_miss;
lck_grp_stat_t lgss_ticket_spin;
#endif
lck_grp_stat_t lgss_mtx_held;
lck_grp_stat_t lgss_mtx_direct_wait;
lck_grp_stat_t lgss_mtx_miss;
lck_grp_stat_t lgss_mtx_wait;
} lck_grp_stats_t;
#define LCK_GRP_MAX_NAME 64
typedef struct _lck_grp_ {
queue_chain_t lck_grp_link;
os_refcnt_t lck_grp_refcnt;
uint32_t lck_grp_spincnt;
uint32_t lck_grp_ticketcnt;
uint32_t lck_grp_mtxcnt;
uint32_t lck_grp_rwcnt;
uint32_t lck_grp_attr;
char lck_grp_name[LCK_GRP_MAX_NAME];
lck_grp_stats_t lck_grp_stats;
} lck_grp_t;
#else
typedef struct _lck_grp_ lck_grp_t;
#endif
#define LCK_GRP_ATTR_STAT 0x1
#define LCK_GRP_ATTR_TIME_STAT 0x2
#ifdef XNU_KERNEL_PRIVATE
typedef struct _lck_grp_attr_ {
uint32_t grp_attr_val;
} lck_grp_attr_t;
struct lck_grp_attr_startup_spec {
lck_grp_attr_t *grp_attr;
uint32_t grp_attr_set_flags;
uint32_t grp_attr_clear_flags;
};
struct lck_grp_startup_spec {
lck_grp_t *grp;
const char *grp_name;
lck_grp_attr_t *grp_attr;
};
extern void lck_grp_attr_startup_init(
struct lck_grp_attr_startup_spec *spec);
extern void lck_grp_startup_init(
struct lck_grp_startup_spec *spec);
#define LCK_GRP_ATTR_DECLARE(var, set_flags, clear_flags) \
SECURITY_READ_ONLY_LATE(lck_grp_attr_t) var; \
static __startup_data struct lck_grp_attr_startup_spec \
__startup_lck_grp_attr_spec_ ## var = { &var, set_flags, clear_flags }; \
STARTUP_ARG(LOCKS_EARLY, STARTUP_RANK_SECOND, lck_grp_attr_startup_init, \
&__startup_lck_grp_attr_spec_ ## var)
#define LCK_GRP_DECLARE_ATTR(var, name, attr) \
__PLACE_IN_SECTION("__DATA,__lock_grp") lck_grp_t var; \
static __startup_data struct lck_grp_startup_spec \
__startup_lck_grp_spec_ ## var = { &var, name, attr }; \
STARTUP_ARG(LOCKS_EARLY, STARTUP_RANK_THIRD, lck_grp_startup_init, \
&__startup_lck_grp_spec_ ## var)
#define LCK_GRP_DECLARE(var, name) \
LCK_GRP_DECLARE_ATTR(var, name, LCK_GRP_ATTR_NULL);
#else
typedef struct __lck_grp_attr__ lck_grp_attr_t;
#endif
#define LCK_GRP_ATTR_NULL (lck_grp_attr_t *)NULL
extern lck_grp_attr_t *lck_grp_attr_alloc_init(
void);
extern void lck_grp_attr_setdefault(
lck_grp_attr_t *attr);
extern void lck_grp_attr_setstat(
lck_grp_attr_t *attr);
extern void lck_grp_attr_free(
lck_grp_attr_t *attr);
extern lck_grp_t *lck_grp_alloc_init(
const char* grp_name,
lck_grp_attr_t *attr);
extern void lck_grp_free(
lck_grp_t *grp);
#ifdef MACH_KERNEL_PRIVATE
extern void lck_grp_init(
lck_grp_t *grp,
const char* grp_name,
lck_grp_attr_t *attr);
extern void lck_grp_reference(
lck_grp_t *grp);
extern void lck_grp_deallocate(
lck_grp_t *grp);
extern void lck_grp_lckcnt_incr(
lck_grp_t *grp,
lck_type_t lck_type);
extern void lck_grp_lckcnt_decr(
lck_grp_t *grp,
lck_type_t lck_type);
#endif
__END_DECLS
#endif