X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/8f6c56a50524aa785f7e596d52dddfb331e18961..3e170ce000f1506b7b5d2c5c7faec85ceabb573d:/osfmk/kern/locks.h diff --git a/osfmk/kern/locks.h b/osfmk/kern/locks.h index e5e11691b..c8768fe6d 100644 --- a/osfmk/kern/locks.h +++ b/osfmk/kern/locks.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2003-2005 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2003-2012 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -46,7 +46,7 @@ typedef unsigned int lck_type_t; #define LCK_TYPE_SPIN 1 #define LCK_TYPE_MTX 2 -#define LCK_TYPE_RW 3 +#define LCK_TYPE_RW 3 #endif @@ -57,8 +57,10 @@ typedef unsigned int lck_sleep_action_t; #define LCK_SLEEP_UNLOCK 0x01 /* Release the lock and return unheld */ #define LCK_SLEEP_SHARED 0x02 /* Reclaim the lock in shared mode (RW only) */ #define LCK_SLEEP_EXCLUSIVE 0x04 /* Reclaim the lock in exclusive mode (RW only) */ +#define LCK_SLEEP_SPIN 0x08 /* Reclaim the lock in spin mode (mutex only) */ +#define LCK_SLEEP_PROMOTED_PRI 0x10 /* Sleep at a promoted priority */ -#define LCK_SLEEP_MASK 0x07 /* Valid actions */ +#define LCK_SLEEP_MASK 0x1f /* Valid actions */ #ifdef MACH_KERNEL_PRIVATE @@ -72,9 +74,11 @@ typedef struct { typedef struct { uint64_t lck_grp_mtx_util_cnt; + /* On x86, this is used as the "direct wait" count */ uint64_t lck_grp_mtx_held_cnt; uint64_t lck_grp_mtx_miss_cnt; uint64_t lck_grp_mtx_wait_cnt; + /* Rest currently unused */ uint64_t lck_grp_mtx_held_max; uint64_t lck_grp_mtx_held_cum; uint64_t lck_grp_mtx_wait_max; @@ -102,12 +106,12 @@ typedef struct _lck_grp_stat_ { typedef struct _lck_grp_ { queue_chain_t lck_grp_link; - unsigned int lck_grp_refcnt; - unsigned int lck_grp_spincnt; - unsigned int lck_grp_mtxcnt; - unsigned int lck_grp_rwcnt; - unsigned int lck_grp_attr; - char lck_grp_name[LCK_GRP_MAX_NAME]; + uint32_t lck_grp_refcnt; + uint32_t lck_grp_spincnt; + 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_stat_t lck_grp_stat; } lck_grp_t; @@ -119,7 +123,7 @@ typedef struct __lck_grp__ lck_grp_t; #ifdef MACH_KERNEL_PRIVATE typedef struct _lck_grp_attr_ { - unsigned int grp_attr_val; + uint32_t grp_attr_val; } lck_grp_attr_t; extern lck_grp_attr_t LockDefaultGroupAttr; @@ -187,8 +191,10 @@ typedef struct _lck_attr_ { extern lck_attr_t LockDefaultLckAttr; -#define LCK_ATTR_NONE 0 -#define LCK_ATTR_DEBUG 0x1 +#define LCK_ATTR_NONE 0 + +#define LCK_ATTR_DEBUG 0x00000001 +#define LCK_ATTR_RW_SHARED_PRIORITY 0x00010000 #else typedef struct __lck_attr__ lck_attr_t; @@ -207,6 +213,14 @@ extern void lck_attr_setdefault( extern void lck_attr_setdebug( lck_attr_t *attr); +extern void lck_attr_cleardebug( + lck_attr_t *attr); + +#ifdef XNU_KERNEL_PRIVATE +extern void lck_attr_rw_shared_priority( + lck_attr_t *attr); +#endif + extern void lck_attr_free( lck_attr_t *attr); @@ -250,8 +264,14 @@ extern wait_result_t lck_spin_sleep_deadline( #ifdef KERNEL_PRIVATE -extern boolean_t lck_spin_try_lock( - lck_spin_t *lck); +extern boolean_t lck_spin_try_lock( lck_spin_t *lck); + +/* NOT SAFE: To be used only by kernel debugger to avoid deadlock. */ +extern boolean_t kdp_lck_spin_is_acquired( lck_spin_t *lck); + +struct _lck_mtx_ext_; +extern void lck_mtx_init_ext(lck_mtx_t *lck, struct _lck_mtx_ext_ *lck_ext, + lck_grp_t *grp, lck_attr_t *attr); #endif @@ -266,7 +286,6 @@ extern void lck_mtx_init( lck_mtx_t *lck, lck_grp_t *grp, lck_attr_t *attr); - extern void lck_mtx_lock( lck_mtx_t *lck); @@ -299,6 +318,44 @@ extern wait_result_t lck_mtx_sleep_deadline( extern boolean_t lck_mtx_try_lock( lck_mtx_t *lck); +extern void mutex_pause(uint32_t); + +extern void lck_mtx_yield ( + lck_mtx_t *lck); + +#if defined(__i386__) || defined(__x86_64__) +extern boolean_t lck_mtx_try_lock_spin( + lck_mtx_t *lck); + +extern boolean_t lck_mtx_try_lock_spin_always( + lck_mtx_t *lck); + +extern void lck_mtx_lock_spin_always( + lck_mtx_t *lck); + +extern void lck_mtx_lock_spin( + lck_mtx_t *lck); + +extern void lck_mtx_convert_spin( + lck_mtx_t *lck); + +extern boolean_t kdp_lck_mtx_lock_spin_is_acquired( + lck_mtx_t *lck); +#define lck_mtx_unlock_always(l) lck_mtx_unlock(l) + +#else +#define lck_mtx_try_lock_spin(l) lck_mtx_try_lock(l) +#define lck_mtx_lock_spin(l) lck_mtx_lock(l) +#define lck_mtx_try_lock_spin_always(l) lck_spin_try_lock(l) +#define lck_mtx_lock_spin_always(l) lck_spin_lock(l) +#define kdp_lck_mtx_lock_spin_is_acquired(l) kdp_lck_spin_is_acquired(l) +#define lck_mtx_unlock_always(l) lck_spin_unlock(l) +#define lck_mtx_convert_spin(l) do {} while (0) +#endif + +extern boolean_t kdp_lck_rw_lock_is_acquired_exclusive( + lck_rw_t *lck); + #endif /* KERNEL_PRIVATE */ extern void lck_mtx_assert( @@ -321,9 +378,15 @@ extern int lck_mtx_lock_acquire( extern void lck_mtx_unlock_wakeup( lck_mtx_t *lck, thread_t holder); +extern void lck_mtx_unlockspin_wakeup( + lck_mtx_t *lck); extern boolean_t lck_mtx_ilk_unlock( lck_mtx_t *lck); + +extern boolean_t lck_mtx_ilk_try_lock( + lck_mtx_t *lck); + #endif #define decl_lck_rw_data(class,name) class lck_rw_t name; @@ -333,6 +396,13 @@ typedef unsigned int lck_rw_type_t; #define LCK_RW_TYPE_SHARED 0x01 #define LCK_RW_TYPE_EXCLUSIVE 0x02 +#ifdef XNU_KERNEL_PRIVATE +#define LCK_RW_ASSERT_SHARED 0x01 +#define LCK_RW_ASSERT_EXCLUSIVE 0x02 +#define LCK_RW_ASSERT_HELD 0x03 +#define LCK_RW_ASSERT_NOTHELD 0x04 +#endif + __BEGIN_DECLS extern lck_rw_t *lck_rw_alloc_init( @@ -364,6 +434,20 @@ extern void lck_rw_lock_exclusive( extern void lck_rw_unlock_exclusive( lck_rw_t *lck); +#ifdef XNU_KERNEL_PRIVATE +/* + * CAUTION + * read-write locks do not have a concept of ownership, so lck_rw_assert() + * merely asserts that someone is holding the lock, not necessarily the caller. + */ +extern void lck_rw_assert( + lck_rw_t *lck, + unsigned int type); + +extern void lck_rw_clear_promotion( + thread_t thread); +#endif + #ifdef KERNEL_PRIVATE extern lck_rw_type_t lck_rw_done( @@ -391,8 +475,6 @@ extern wait_result_t lck_rw_sleep_deadline( wait_interrupt_t interruptible, uint64_t deadline); -#ifdef KERNEL_PRIVATE - extern boolean_t lck_rw_lock_shared_to_exclusive( lck_rw_t *lck); @@ -403,6 +485,8 @@ extern boolean_t lck_rw_try_lock( lck_rw_t *lck, lck_rw_type_t lck_rw_type); +#ifdef KERNEL_PRIVATE + extern boolean_t lck_rw_try_lock_shared( lck_rw_t *lck);