xnu-6153.121.1.tar.gz

[apple/xnu.git] / bsd / sys / eventvar.h

diff --git a/bsd/sys/eventvar.h b/bsd/sys/eventvar.h
index 82323625f9887af1fa8e303557c5864bc0f3e138..62387f2b61741114f9dd6e6a89f0f2f3a16f6e49 100644 (file)
--- a/bsd/sys/eventvar.h
+++ b/bsd/sys/eventvar.h
@@ -2,7 +2,7 @@
  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

- * 
+ *

  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in


@@ -11,10 +11,10 @@
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.

- * 
+ *

  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.

- * 
+ *

  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,


@@ -22,10 +22,10 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.

- * 
+ *

  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */

-/*-
+/*

  * Copyright (c) 1999,2000 Jonathan Lemon <jlemon@FreeBSD.org>
  * All rights reserved.
  *
  * Copyright (c) 1999,2000 Jonathan Lemon <jlemon@FreeBSD.org>
  * All rights reserved.
  *


@@ -63,13 +63,12 @@
 
 #if defined(XNU_KERNEL_PRIVATE)
 
 
 #if defined(XNU_KERNEL_PRIVATE)
 

-typedef int (*kevent_callback_t)(struct kqueue *, struct kevent_internal_s *, void *);
-typedef void (*kqueue_continue_t)(struct kqueue *, void *, int);
+typedef int (*kevent_callback_t)(struct kevent_qos_s *, struct kevent_ctx_s *);

 
 #include <stdint.h>
 #include <kern/locks.h>
 
 #include <stdint.h>
 #include <kern/locks.h>

-#include <sys/pthread_shims.h>

 #include <mach/thread_policy.h>
 #include <mach/thread_policy.h>

+#include <pthread/workqueue_internal.h>

 
 /*
  * Lock ordering:
 
 /*
  * Lock ordering:


@@ -80,7 +79,7 @@ typedef void (*kqueue_continue_t)(struct kqueue *, void *, int);
  *     proc fd lock -> kq lock -> kq-waitq-set lock -> thread lock
  *
  * WorkQ/WorkLoop kqueues (from above):
  *     proc fd lock -> kq lock -> kq-waitq-set lock -> thread lock
  *
  * WorkQ/WorkLoop kqueues (from above):

- *     proc fd lock -> kq lock -> kq-request lock -> pthread kext locks -> thread lock
+ *     proc fd lock -> kq lock -> workq lock -> thread lock

  *
  * Whenever kqueues interact with source locks, it drops all of its own
  * locks in exchange for a use-reference on the knote used to synchronize
  *
  * Whenever kqueues interact with source locks, it drops all of its own
  * locks in exchange for a use-reference on the knote used to synchronize


@@ -89,16 +88,64 @@ typedef void (*kqueue_continue_t)(struct kqueue *, void *, int);
  *
  * Standard file-based kqueues (from below):
  *     XXX lock -> kq lock -> kq-waitq-set lock -> thread lock
  *
  * Standard file-based kqueues (from below):
  *     XXX lock -> kq lock -> kq-waitq-set lock -> thread lock

- * Standard file-based kqueues with non-kq-aware sources (from below):
- *     XXX lock -> kq-waitq-set lock -> thread lock

  *
  * WorkQ/WorkLoop kqueues (from below):
  *
  * WorkQ/WorkLoop kqueues (from below):

- *     XXX lock -> kq lock -> kq-request lock -> pthread kext locks -> thread lock
- * WorkQ/WorkLoop kqueues with non-kq-aware sources (from below):
- *     XXX -> kq-waitq-set lock -> kq-request lock -> pthread kext locks -> thread lock
+ *     XXX lock -> kq lock -> workq lock -> thread lock

  */
 
  */
 

-#define KQEXTENT       256             /* linear growth by this amount */
+#define KQEXTENT        256             /* linear growth by this amount */
+
+struct knote_lock_ctx {
+       struct knote               *knlc_knote;
+       thread_t                    knlc_thread;
+       uintptr_t                   knlc_waiters;
+       LIST_ENTRY(knote_lock_ctx)  knlc_link;
+#if DEBUG || DEVELOPMENT
+#define KNOTE_LOCK_CTX_UNLOCKED 0
+#define KNOTE_LOCK_CTX_LOCKED   1
+#define KNOTE_LOCK_CTX_WAITING  2
+       int knlc_state;
+#endif
+};
+LIST_HEAD(knote_locks, knote_lock_ctx);
+
+#if DEBUG || DEVELOPMENT
+/*
+ * KNOTE_LOCK_CTX(name) is a convenience macro to define a knote lock context on
+ * the stack named `name`. In development kernels, it uses tricks to make sure
+ * not locks was still held when exiting the C-scope that contains this context.
+ */
+static inline void
+knote_lock_ctx_chk(struct knote_lock_ctx *knlc)
+{
+       /* evil hackery to make sure no one forgets to unlock */
+       assert(knlc->knlc_state == KNOTE_LOCK_CTX_UNLOCKED);
+}
+#define KNOTE_LOCK_CTX(n) \
+               struct knote_lock_ctx n __attribute__((cleanup(knote_lock_ctx_chk))); \
+               n.knlc_state = KNOTE_LOCK_CTX_UNLOCKED
+#else
+#define KNOTE_LOCK_CTX(n) \
+               struct knote_lock_ctx n
+#endif
+
+
+__options_decl(kq_state_t, uint16_t, {
+       KQ_SEL            = 0x0001, /* select was recorded for kq */
+       KQ_SLEEP          = 0x0002, /* thread is waiting for events */
+       KQ_PROCWAIT       = 0x0004, /* thread waiting for processing */
+       KQ_KEV32          = 0x0008, /* kq is used with 32-bit events */
+       KQ_KEV64          = 0x0010, /* kq is used with 64-bit events */
+       KQ_KEV_QOS        = 0x0020, /* kq events carry QoS info */
+       KQ_WORKQ          = 0x0040, /* KQ is bound to process workq */
+       KQ_WORKLOOP       = 0x0080, /* KQ is part of a workloop */
+       KQ_PROCESSING     = 0x0100, /* KQ is being processed */
+       KQ_DRAIN          = 0x0200, /* kq is draining */
+       KQ_WAKEUP         = 0x0400, /* kq awakened while processing */
+       KQ_DYNAMIC        = 0x0800, /* kqueue is dynamically managed */
+       KQ_R2K_ARMED      = 0x1000, /* ast notification armed */
+       KQ_HAS_TURNSTILE  = 0x2000, /* this kqueue has a turnstile */
+});

 
 /*
  * kqueue - common core definition of a kqueue
 
 /*
  * kqueue - common core definition of a kqueue


@@ -108,28 +155,21 @@ typedef void (*kqueue_continue_t)(struct kqueue *, void *, int);
  *          derived from this definition.
  */
 struct kqueue {
  *          derived from this definition.
  */
 struct kqueue {

-       struct waitq_set    kq_wqs;       /* private waitq set */
-       lck_spin_t          kq_lock;      /* kqueue lock */
-       uint16_t            kq_state;     /* state of the kq */
-       uint16_t            kq_level;     /* nesting level of the kq */
-       uint32_t            kq_count;     /* number of queued events */
-       struct proc         *kq_p;        /* process containing kqueue */
-       struct kqtailq      kq_queue[1];  /* variable array of kqtailq structs */
+       struct {
+               struct waitq_set    kq_wqs;       /* private waitq set */
+               lck_spin_t          kq_lock;      /* kqueue lock */
+               kq_state_t          kq_state;     /* state of the kq */
+               union {
+                       uint16_t    kq_waitq_hook;/* prepost hook (kqwl/kqwq) */
+                       uint16_t    kq_level;     /* nesting level of the kq */
+               };
+               uint32_t            kq_count;     /* number of queued events */
+               struct proc        *kq_p;         /* process containing kqueue */
+               struct knote_locks  kq_knlocks;   /* list of knote locks held */
+       }; /* make sure struct padding is put before kq_queue */
+       struct kqtailq      kq_queue[0];      /* variable array of queues */

 };
 
 };
 

-#define KQ_SEL            0x001  /* select was recorded for kq */
-#define KQ_SLEEP          0x002  /* thread is waiting for events */
-#define KQ_PROCWAIT       0x004  /* thread waiting for processing */
-#define KQ_KEV32          0x008  /* kq is used with 32-bit events */
-#define KQ_KEV64          0x010  /* kq is used with 64-bit events */
-#define KQ_KEV_QOS        0x020  /* kq events carry QoS info */
-#define KQ_WORKQ          0x040  /* KQ is bound to process workq */
-#define KQ_WORKLOOP       0x080  /* KQ is part of a workloop */
-#define KQ_PROCESSING     0x100  /* KQ is being processed */
-#define KQ_DRAIN          0x200  /* kq is draining */
-#define KQ_WAKEUP         0x400  /* kq awakened while processing */
-#define KQ_DYNAMIC        0x800  /* kqueue is dynamically managed */
-#define KQ_NO_WQ_THREAD   0x1000 /* kq will not have workqueue threads dynamically created */

 /*
  * kqfile - definition of a typical kqueue opened as a file descriptor
  *          via the kqueue() system call.
 /*
  * kqfile - definition of a typical kqueue opened as a file descriptor
  *          via the kqueue() system call.


@@ -139,67 +179,19 @@ struct kqueue {
  */
 struct kqfile {
        struct kqueue       kqf_kqueue;     /* common kqueue core */
  */
 struct kqfile {
        struct kqueue       kqf_kqueue;     /* common kqueue core */

+       struct kqtailq      kqf_queue;      /* queue of woken up knotes */

        struct kqtailq      kqf_suppressed; /* suppression queue */
        struct selinfo      kqf_sel;        /* parent select/kqueue info */
        struct kqtailq      kqf_suppressed; /* suppression queue */
        struct selinfo      kqf_sel;        /* parent select/kqueue info */

-};
-

 #define kqf_wqs      kqf_kqueue.kq_wqs
 #define kqf_lock     kqf_kqueue.kq_lock
 #define kqf_state    kqf_kqueue.kq_state
 #define kqf_level    kqf_kqueue.kq_level
 #define kqf_count    kqf_kqueue.kq_count
 #define kqf_p        kqf_kqueue.kq_p
 #define kqf_wqs      kqf_kqueue.kq_wqs
 #define kqf_lock     kqf_kqueue.kq_lock
 #define kqf_state    kqf_kqueue.kq_state
 #define kqf_level    kqf_kqueue.kq_level
 #define kqf_count    kqf_kqueue.kq_count
 #define kqf_p        kqf_kqueue.kq_p

-#define kqf_queue    kqf_kqueue.kq_queue
-
-#define QOS_INDEX_KQFILE   0          /* number of qos levels in a file kq */
-
-struct kqr_bound {
-       struct kqtailq   kqrb_suppressed;     /* Per-QoS suppression queues */
-       thread_t         kqrb_thread;         /* thread to satisfy request */
-};
-
-/*
- * kqrequest - per-QoS thread request status
- */
-struct kqrequest {
-#if 0
-       union {
-               struct kqr_bound kqru_bound;       /* used when thread is bound */
-               struct workq_threadreq_s kqru_req; /* used when request oustanding */
-       } kqr_u;
-#define kqr_suppressed kqr_u.kqru_bound.kqrb_suppressed
-#define kqr_thread     kqr_u.kqru_bound.kqrb_thread
-#define kqr_req        kqr_u.kqru_req
-#else
-       struct kqr_bound kqr_bound;            /* used when thread is bound */
-       struct workq_threadreq_s kqr_req;      /* used when request oustanding */
-#define kqr_suppressed kqr_bound.kqrb_suppressed
-#define kqr_thread     kqr_bound.kqrb_thread
-#endif
-       uint8_t          kqr_state;                    /* KQ/workq interaction state */
-       uint8_t          kqr_wakeup_indexes;           /* QoS/override levels that woke */
-       uint16_t         kqr_dsync_waiters:13,         /* number of dispatch sync waiters */
-                        kqr_dsync_owner_qos:3;        /* Qos override on dispatch sync owner */
-       uint16_t         kqr_sync_suppress_count;      /* number of suppressed sync ipc knotes */
-       kq_index_t       kqr_stayactive_qos:3,         /* max QoS of statyactive knotes */
-                        kqr_owner_override_is_sync:1, /* sync owner has sync ipc override */
-                        kqr_override_index:3,         /* highest wakeup override index */
-                        kqr_has_sync_override:1;      /* Qos/override at UI is sync ipc override */
-
-       /* set under both the kqlock and the filt_wllock */
-       kq_index_t       :0;                           /* prevent bitfields coalescing <rdar://problem/31854115> */
-       kq_index_t       kqr_qos_index:4,              /* QoS for the thread request */
-                        kqr_dsync_waiters_qos:4;      /* override from dispatch sync waiters */

 };
 
 };
 

+#define QOS_INDEX_KQFILE   0          /* number of qos levels in a file kq */

 
 

-#define KQR_PROCESSING              0x01       /* requested thread is running the q */
-#define KQR_THREQUESTED              0x02      /* thread has been requested from workq */
-#define KQR_WAKEUP                   0x04      /* wakeup called during processing */
-#define KQR_BOUND                    0x08       /* servicing thread is bound */
-#define KQR_THOVERCOMMIT             0x20       /* overcommit needed for thread requests */
-#define KQR_DRAIN                    0x40       /* cancel initiated - drain fulfill */
-#define KQR_R2K_NOTIF_ARMED          0x80       /* ast notifications armed */

 /*
  * WorkQ kqueues need to request threads to service the triggered
  * knotes in the queue.  These threads are brought up on a
 /*
  * WorkQ kqueues need to request threads to service the triggered
  * knotes in the queue.  These threads are brought up on a


@@ -213,40 +205,8 @@ struct kqrequest {
 #define KQWQ_QOS_MANAGER (THREAD_QOS_LAST)
 #endif
 
 #define KQWQ_QOS_MANAGER (THREAD_QOS_LAST)
 #endif
 

-#if !defined(KQWQ_NQOS)
-#define KQWQ_NQOS    (KQWQ_QOS_MANAGER + 1)
-#endif
-
-/*
- * Workq thread start out a particular effective-requested-QoS, but
- * additional events processed by the filters may represent
- * backlogged events that may themselves have a higher requested-QoS.
- * To represent this, the filter may apply an override to a knote's
- * requested QoS.
- *
- * We further segregate these overridden knotes into different buckets
- * by <requested, override> grouping. This allows easy matching of
- * knotes to process vs. the highest workq thread override applied.
- *
- * Only certain override patterns need to be supported. A knote
- * cannot have an effective-requested-QoS of UNSPECIFIED - because
- * the kevent->qos (when canonicalized) will always be above that
- * or indicate manager.  And we don't allow an override to specify
- * manager.  This results in the following buckets being needed:
- *
- *                  Effective-Requested QoS
- *           MAINT  BG    UTIL  DEFAULT UINIT UINTER MANAGER
- * override:
- * MAINT      0
- * BG         1      6
- * UTILITY    2      7     11
- * DEFAULT    3      8     12    15
- * UINIT      4      9     13    16     18
- * UINTER     5     10     14    17     19     20
- *                                                    21
- */

 #if !defined(KQWQ_NBUCKETS)
 #if !defined(KQWQ_NBUCKETS)

-#define KQWQ_NBUCKETS 22
+#define KQWQ_NBUCKETS    (KQWQ_QOS_MANAGER + 1)

 #endif
 
 /*
 #endif
 
 /*


@@ -258,25 +218,18 @@ struct kqrequest {
  *           values.
  */
 struct kqworkq {
  *           values.
  */
 struct kqworkq {

-       struct kqueue    kqwq_kqueue;
-       struct kqtailq   kqwq_queuecont[KQWQ_NBUCKETS-1]; /* continue array of queues */
-       struct kqrequest kqwq_request[KQWQ_NQOS];         /* per-QoS request states */
-       lck_spin_t       kqwq_reqlock;                    /* kqueue request lock */
+       struct kqueue       kqwq_kqueue;
+       struct kqtailq      kqwq_queue[KQWQ_NBUCKETS];       /* array of queues */
+       struct kqtailq      kqwq_suppressed[KQWQ_NBUCKETS];  /* Per-QoS suppression queues */
+       workq_threadreq_s   kqwq_request[KQWQ_NBUCKETS];     /* per-QoS request states */

 };
 
 };
 

-#define kqwq_wqs     kqwq_kqueue.kq_wqs
-#define kqwq_lock    kqwq_kqueue.kq_lock
-#define kqwq_state   kqwq_kqueue.kq_state
-#define kqwq_level   kqwq_kqueue.kq_level
-#define kqwq_count   kqwq_kqueue.kq_count
-#define kqwq_p       kqwq_kqueue.kq_p
-#define kqwq_queue   kqwq_kqueue.kq_queue
-
-#define kqwq_req_lock(kqwq)    lck_spin_lock(&kqwq->kqwq_reqlock)
-#define kqwq_req_unlock(kqwq)  lck_spin_unlock(&kqwq->kqwq_reqlock)
-#define kqwq_req_held(kqwq)    LCK_SPIN_ASSERT(&kqwq->kqwq_reqlock, LCK_ASSERT_OWNED)
-
-#define KQWQ_THMANAGER    0x10      /* expect manager thread to run the queue */
+#define kqwq_wqs         kqwq_kqueue.kq_wqs
+#define kqwq_lock        kqwq_kqueue.kq_lock
+#define kqwq_state       kqwq_kqueue.kq_state
+#define kqwq_waitq_hook  kqwq_kqueue.kq_waitq_hook
+#define kqwq_count       kqwq_kqueue.kq_count
+#define kqwq_p           kqwq_kqueue.kq_p

 
 /*
  * WorkLoop kqueues need to request a thread to service the triggered
 
 /*
  * WorkLoop kqueues need to request a thread to service the triggered


@@ -318,49 +271,99 @@ struct kqworkq {
  *      NOTE:   "lane" support is TBD.
  */
 struct kqworkloop {
  *      NOTE:   "lane" support is TBD.
  */
 struct kqworkloop {

-       struct kqueue    kqwl_kqueue;                     /* queue of events */
-       struct kqtailq   kqwl_queuecont[KQWL_NBUCKETS-1]; /* continue array of queues */
-       struct kqrequest kqwl_request;                    /* thread request state */
-       lck_spin_t       kqwl_reqlock;                    /* kqueue request lock */
-       lck_mtx_t        kqwl_statelock;                  /* state/debounce lock */
-       thread_t         kqwl_owner;                      /* current [sync] owner thread */
-       uint32_t         kqwl_retains;                    /* retain references */
-       kqueue_id_t      kqwl_dynamicid;                  /* dynamic identity */
-       SLIST_ENTRY(kqworkloop) kqwl_hashlink;            /* linkage for search list */
+       struct kqueue       kqwl_kqueue;                  /* queue of events */
+       struct kqtailq      kqwl_queue[KQWL_NBUCKETS];    /* array of queues */
+       struct kqtailq      kqwl_suppressed;              /* Per-QoS suppression queues */
+       workq_threadreq_s   kqwl_request;                 /* thread request state */
+       lck_spin_t          kqwl_statelock;               /* state/debounce lock */
+       thread_t            kqwl_owner;                   /* current [sync] owner thread */
+       uint32_t            kqwl_retains;                 /* retain references */
+#define KQWL_STAYACTIVE_FIRED_BIT     (1 << 0)
+       uint8_t             kqwl_wakeup_indexes;          /* QoS/override levels that woke */
+       kq_index_t          kqwl_stayactive_qos;          /* max QoS of statyactive knotes */
+       struct turnstile   *kqwl_turnstile;               /* turnstile for sync IPC/waiters */
+       kqueue_id_t         kqwl_dynamicid;               /* dynamic identity */
+       uint64_t            kqwl_params;                  /* additional parameters */
+       LIST_ENTRY(kqworkloop) kqwl_hashlink;             /* linkage for search list */
+#if CONFIG_WORKLOOP_DEBUG
+#define KQWL_HISTORY_COUNT 32
+#define KQWL_HISTORY_WRITE_ENTRY(kqwl, ...) ({ \
+               struct kqworkloop *__kqwl = (kqwl); \
+               unsigned int __index = os_atomic_inc_orig(&__kqwl->kqwl_index, relaxed); \
+               __kqwl->kqwl_history[__index % KQWL_HISTORY_COUNT] = \
+                               (struct kqwl_history)__VA_ARGS__; \
+       })
+       struct kqwl_history {
+               thread_t updater;  /* Note: updates can be reordered */
+               thread_t servicer;
+               thread_t old_owner;
+               thread_t new_owner;
+
+               uint64_t kev_ident;
+               int16_t  error;
+               uint16_t kev_flags;
+               uint32_t kev_fflags;
+
+               uint64_t kev_mask;
+               uint64_t kev_value;
+               uint64_t in_value;
+       } kqwl_history[KQWL_HISTORY_COUNT];
+       unsigned int kqwl_index;
+#endif // CONFIG_WORKLOOP_DEBUG

 };
 };

+LIST_HEAD(kqwllist, kqworkloop);

 
 

-SLIST_HEAD(kqlist, kqworkloop);
+typedef union {
+       struct kqueue       *kq;
+       struct kqworkq      *kqwq;
+       struct kqfile       *kqf;
+       struct kqworkloop   *kqwl;
+} __attribute__((transparent_union)) kqueue_t;

 
 

-#define kqwl_wqs     kqwl_kqueue.kq_wqs
-#define kqwl_lock    kqwl_kqueue.kq_lock
-#define kqwl_state   kqwl_kqueue.kq_state
-#define kqwl_level   kqwl_kqueue.kq_level
-#define kqwl_count   kqwl_kqueue.kq_count
-#define kqwl_p       kqwl_kqueue.kq_p
-#define kqwl_queue   kqwl_kqueue.kq_queue

 
 

-#define kqwl_req_lock(kqwl)    lck_spin_lock(&kqwl->kqwl_reqlock)
-#define kqwl_req_unlock(kqwl)  lck_spin_unlock(&kqwl->kqwl_reqlock)
-#define kqwl_req_held(kqwl)    LCK_SPIN_ASSERT(&kqwl->kqwl_reqlock, LCK_ASSERT_OWNED)
+#define kqwl_wqs         kqwl_kqueue.kq_wqs
+#define kqwl_lock        kqwl_kqueue.kq_lock
+#define kqwl_state       kqwl_kqueue.kq_state
+#define kqwl_waitq_hook  kqwl_kqueue.kq_waitq_hook
+#define kqwl_count       kqwl_kqueue.kq_count
+#define kqwl_p           kqwl_kqueue.kq_p

 
 #define KQ_WORKLOOP_RETAINS_MAX UINT32_MAX
 
 
 #define KQ_WORKLOOP_RETAINS_MAX UINT32_MAX
 

-extern int workloop_fulfill_threadreq(struct proc *p, workq_threadreq_t req, thread_t thread, int flags);
+extern void kqueue_threadreq_unbind(struct proc *p, workq_threadreq_t);
+
+// called with the kq req held
+#define KQUEUE_THREADERQ_BIND_NO_INHERITOR_UPDATE 0x1
+extern void kqueue_threadreq_bind(struct proc *p, workq_threadreq_t req,
+    thread_t thread, unsigned int flags);
+
+struct turnstile *kqueue_threadreq_get_turnstile(workq_threadreq_t kqr);
+
+// called with the wq lock held
+extern void kqueue_threadreq_bind_prepost(struct proc *p, workq_threadreq_t req,
+    struct uthread *uth);
+
+// called with no lock held
+extern void kqueue_threadreq_bind_commit(struct proc *p, thread_t thread);
+
+extern void kqueue_threadreq_cancel(struct proc *p, workq_threadreq_t req);

 
 

-extern struct kqueue *kqueue_alloc(struct proc *, unsigned int);
+// lock not held as kqwl_params is immutable after creation
+extern workq_threadreq_param_t kqueue_threadreq_workloop_param(workq_threadreq_t req);
+
+extern struct kqueue *kqueue_alloc(struct proc *);

 extern void kqueue_dealloc(struct kqueue *);
 extern void kqueue_dealloc(struct kqueue *);

+extern void kqworkq_dealloc(struct kqworkq *kqwq);

 
 extern void knotes_dealloc(struct proc *);
 
 extern void knotes_dealloc(struct proc *);

+extern void kqworkloops_dealloc(struct proc *);

 
 

-extern void kevent_register(struct kqueue *, struct kevent_internal_s *, struct proc *);
-extern int kqueue_scan(struct kqueue *, kevent_callback_t, kqueue_continue_t,
-                      void *, struct filt_process_s *, struct timeval *, struct proc *);
+extern int kevent_register(struct kqueue *, struct kevent_qos_s *,
+    struct knote **);
+extern int kqueue_scan(struct kqueue *, int flags,
+    struct kevent_ctx_s *, kevent_callback_t);

 extern int kqueue_stat(struct kqueue *, void *, int, proc_t);
 
 #endif /* XNU_KERNEL_PRIVATE */
 
 #endif /* !_SYS_EVENTVAR_H_ */
 extern int kqueue_stat(struct kqueue *, void *, int, proc_t);
 
 #endif /* XNU_KERNEL_PRIVATE */
 
 #endif /* !_SYS_EVENTVAR_H_ */

-
-
-
-