/*
- * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2004-2007 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#define enaLkDeb 0x00000001 /* Request debug in default attribute */
#define enaLkStat 0x00000002 /* Request statistic in default attribute */
-#endif
+#endif /* MACH_KERNEL_PRIVATE */
-#ifdef MACH_KERNEL_PRIVATE
+#if defined(MACH_KERNEL_PRIVATE)
typedef struct {
- unsigned int lck_spin_data[10]; /* XXX - usimple_lock_data_t */
+ volatile uintptr_t interlock;
+#if MACH_LDEBUG
+ unsigned long lck_spin_pad[9]; /* XXX - usimple_lock_data_t */
+#endif
} lck_spin_t;
#define LCK_SPIN_TAG_DESTROYED 0x00002007 /* lock marked as Destroyed */
-#else
+#else /* MACH_KERNEL_PRIVATE */
#ifdef KERNEL_PRIVATE
typedef struct {
- unsigned int opaque[10];
+ unsigned long opaque[10];
} lck_spin_t;
-#else
+#else /* KERNEL_PRIVATE */
typedef struct __lck_spin_t__ lck_spin_t;
#endif
#endif
#ifdef MACH_KERNEL_PRIVATE
+/* The definition of this structure, including the layout of the
+ * state bitfield, is tailored to the asm implementation in i386_lock.s
+ */
typedef struct _lck_mtx_ {
union {
struct {
- unsigned int lck_mtxd_ilk;
- unsigned int lck_mtxd_locked;
- unsigned short lck_mtxd_waiters;
- unsigned short lck_mtxd_pri;
+ volatile uintptr_t lck_mtxd_owner;
+ union {
+ struct {
+ volatile uint32_t
+ lck_mtxd_waiters:16,
+ lck_mtxd_pri:8,
+ lck_mtxd_ilocked:1,
+ lck_mtxd_mlocked:1,
+ lck_mtxd_promoted:1,
+ lck_mtxd_spin:1,
+ lck_mtxd_is_ext:1,
+ lck_mtxd_pad3:3;
+ };
+ uint32_t lck_mtxd_state;
+ };
+#if defined(__x86_64__)
+ /* Pad field used as a canary, initialized to ~0 */
+ uint32_t lck_mtxd_pad32;
+#endif
} lck_mtxd;
struct {
- unsigned int lck_mtxi_tag;
- struct _lck_mtx_ext_ *lck_mtxi_ptr;
- unsigned int lck_mtxi_pad8;
+ struct _lck_mtx_ext_ *lck_mtxi_ptr;
+ uint32_t lck_mtxi_tag;
+#if defined(__x86_64__)
+ uint32_t lck_mtxi_pad32;
+#endif
} lck_mtxi;
} lck_mtx_sw;
} lck_mtx_t;
-#define lck_mtx_ilk lck_mtx_sw.lck_mtxd.lck_mtxd_ilk
-#define lck_mtx_locked lck_mtx_sw.lck_mtxd.lck_mtxd_locked
+#define lck_mtx_owner lck_mtx_sw.lck_mtxd.lck_mtxd_owner
#define lck_mtx_waiters lck_mtx_sw.lck_mtxd.lck_mtxd_waiters
#define lck_mtx_pri lck_mtx_sw.lck_mtxd.lck_mtxd_pri
+#define lck_mtx_promoted lck_mtx_sw.lck_mtxd.lck_mtxd_promoted
+#define lck_mtx_is_ext lck_mtx_sw.lck_mtxd.lck_mtxd_is_ext
#define lck_mtx_tag lck_mtx_sw.lck_mtxi.lck_mtxi_tag
#define lck_mtx_ptr lck_mtx_sw.lck_mtxi.lck_mtxi_ptr
+#define lck_mtx_state lck_mtx_sw.lck_mtxd.lck_mtxd_state
+/* This pattern must subsume the interlocked, mlocked and spin bits */
+#define LCK_MTX_TAG_INDIRECT 0x07ff1007 /* lock marked as Indirect */
+#define LCK_MTX_TAG_DESTROYED 0x07fe2007 /* lock marked as Destroyed */
-#define LCK_MTX_TAG_INDIRECT 0x00001007 /* lock marked as Indirect */
-#define LCK_MTX_TAG_DESTROYED 0x00002007 /* lock marked as Destroyed */
+/* Adaptive spin before blocking */
+extern unsigned int MutexSpin;
+extern int lck_mtx_lock_spinwait_x86(lck_mtx_t *mutex);
+extern void lck_mtx_lock_wait_x86(lck_mtx_t *mutex);
+extern void lck_mtx_lock_acquire_x86(lck_mtx_t *mutex);
+extern void lck_mtx_unlock_wakeup_x86(lck_mtx_t *mutex, int prior_lock_state);
+
+extern void lck_mtx_lock_mark_destroyed(lck_mtx_t *mutex);
+extern int lck_mtx_lock_grab_mutex(lck_mtx_t *mutex);
+
+extern void hw_lock_byte_init(volatile uint8_t *lock_byte);
+extern void hw_lock_byte_lock(volatile uint8_t *lock_byte);
+extern void hw_lock_byte_unlock(volatile uint8_t *lock_byte);
typedef struct {
unsigned int type;
+#ifdef __x86_64__
+ unsigned int pad4;
+#endif
vm_offset_t pc;
vm_offset_t thread;
} lck_mtx_deb_t;
lck_mtx_t lck_mtx;
struct _lck_grp_ *lck_mtx_grp;
unsigned int lck_mtx_attr;
+#ifdef __x86_64__
+ unsigned int lck_mtx_pad1;
+#endif
lck_mtx_deb_t lck_mtx_deb;
- lck_mtx_stat_t lck_mtx_stat;
+ uint64_t lck_mtx_stat;
+#ifdef __x86_64__
+ unsigned int lck_mtx_pad2[2];
+#endif
} lck_mtx_ext_t;
#define LCK_MTX_ATTR_DEBUG 0x1
-#define LCK_MTX_ATTR_DEBUGb 31
+#define LCK_MTX_ATTR_DEBUGb 0
#define LCK_MTX_ATTR_STAT 0x2
-#define LCK_MTX_ATTR_STATb 30
+#define LCK_MTX_ATTR_STATb 1
+
+#else /* MACH_KERNEL_PRIVATE */
+#ifdef XNU_KERNEL_PRIVATE
+typedef struct {
+ unsigned long opaque[2];
+} lck_mtx_t;
+typedef struct {
+ unsigned long opaque[10];
+} lck_mtx_ext_t;
#else
#ifdef KERNEL_PRIVATE
typedef struct {
- unsigned int opaque[3];
+ unsigned long opaque[2];
} lck_mtx_t;
+
+typedef struct {
+ unsigned long opaque[10];
+} lck_mtx_ext_t;
+
#else
-typedef struct __lck_mtx_t__ lck_mtx_t;
+typedef struct __lck_mtx_t__ lck_mtx_t;
+typedef struct __lck_mtx_ext_t__ lck_mtx_ext_t;
+#endif
#endif
#endif
#ifdef MACH_KERNEL_PRIVATE
-typedef struct {
- hw_lock_data_t interlock;
- volatile unsigned int
- read_count:16, /* No. of accepted readers */
- want_upgrade:1, /* Read-to-write upgrade waiting */
- want_write:1, /* Writer is waiting, or locked for write */
- waiting:1, /* Someone is sleeping on lock */
- can_sleep:1; /* Can attempts to lock go to sleep? */
- unsigned int lck_rw_tag;
+#pragma pack(1) /* Make sure the structure stays as we defined it */
+typedef struct _lck_rw_t_internal_ {
+ volatile uint16_t lck_rw_shared_count; /* No. of accepted readers */
+ volatile uint8_t lck_rw_interlock; /* Interlock byte */
+ volatile uint8_t
+ lck_rw_priv_excl:1, /* Writers prioritized if set */
+ lck_rw_want_upgrade:1, /* Read-to-write upgrade waiting */
+ lck_rw_want_write:1, /* Writer waiting or locked for write */
+ lck_r_waiting:1, /* Reader is sleeping on lock */
+ lck_w_waiting:1, /* Writer is sleeping on lock */
+ lck_rw_can_sleep:1, /* Can attempts to lock go to sleep? */
+ lck_rw_padb6:2; /* padding */
+
+ uint32_t lck_rw_tag; /* This can be obsoleted when stats
+ * are in
+ */
+ uint32_t lck_rw_pad8;
+#ifdef __x86_64__
+ uint32_t lck_rw_pad12;
+#endif
} lck_rw_t;
+#pragma pack()
+
+#define LCK_RW_ATTR_DEBUG 0x1
+#define LCK_RW_ATTR_DEBUGb 0
+#define LCK_RW_ATTR_STAT 0x2
+#define LCK_RW_ATTR_STATb 1
+#define LCK_RW_ATTR_READ_PRI 0x3
+#define LCK_RW_ATTR_READ_PRIb 2
+#define LCK_RW_ATTR_DIS_THREAD 0x40000000
+#define LCK_RW_ATTR_DIS_THREADb 30
+#define LCK_RW_ATTR_DIS_MYLOCK 0x10000000
+#define LCK_RW_ATTR_DIS_MYLOCKb 28
#define LCK_RW_TAG_DESTROYED 0x00002007 /* lock marked as Destroyed */
#else
#ifdef KERNEL_PRIVATE
+#pragma pack(1)
typedef struct {
- unsigned int opaque[3];
+ uint32_t opaque[3];
+#ifdef __x86_64__
+ uint32_t opaque4;
+#endif
} lck_rw_t;
+#pragma pack()
#else
typedef struct __lck_rw_t__ lck_rw_t;
#endif
projects / apple / xnu.git / blobdiff