+/*
+ * THREAD_QOS_POLICY:
+ */
+#define THREAD_QOS_POLICY 9
+#define THREAD_QOS_POLICY_OVERRIDE 10
+
+typedef uint8_t thread_qos_t;
+#define THREAD_QOS_UNSPECIFIED 0
+#define THREAD_QOS_DEFAULT THREAD_QOS_UNSPECIFIED /* Temporary rename */
+#define THREAD_QOS_MAINTENANCE 1
+#define THREAD_QOS_BACKGROUND 2
+#define THREAD_QOS_UTILITY 3
+#define THREAD_QOS_LEGACY 4 /* i.e. default workq threads */
+#define THREAD_QOS_USER_INITIATED 5
+#define THREAD_QOS_USER_INTERACTIVE 6
+
+#define THREAD_QOS_LAST 7
+
+#define THREAD_QOS_MIN_TIER_IMPORTANCE (-15)
+
+/*
+ * Overrides are inputs to the task/thread policy engine that
+ * temporarily elevate the effective QoS of a thread without changing
+ * its steady-state (and round-trip-able) requested QoS. The
+ * interfaces into the kernel allow the caller to associate a resource
+ * and type that describe the reason/lifecycle of the override. For
+ * instance, a contended pthread_mutex_t held by a UTILITY thread
+ * might get an override to USER_INTERACTIVE, with the resource
+ * being the userspace address of the pthread_mutex_t. When the
+ * owning thread releases that resource, it can call into the
+ * task policy subsystem to drop the override because of that resource,
+ * although if more contended locks are held by the thread, the
+ * effective QoS may remain overridden for longer.
+ *
+ * THREAD_QOS_OVERRIDE_TYPE_PTHREAD_MUTEX is used for contended
+ * pthread_mutex_t's via the pthread kext. The holder gets an override
+ * with resource=&mutex and a count of 1 by the initial contender.
+ * Subsequent contenders raise the QoS value, until the holder
+ * decrements the count to 0 and the override is released.
+ *
+ * THREAD_QOS_OVERRIDE_TYPE_PTHREAD_RWLOCK is unimplemented and has no
+ * specified semantics.
+ *
+ * THREAD_QOS_OVERRIDE_TYPE_PTHREAD_EXPLICIT_OVERRIDE are explicitly
+ * paired start/end overrides on a target thread. The resource can
+ * either be a memory allocation in userspace, or the pthread_t of the
+ * overrider if no allocation was used.
+ *
+ * THREAD_QOS_OVERRIDE_TYPE_WILDCARD is a catch-all which will reset every
+ * resource matching the resource value. Passing
+ * THREAD_QOS_OVERRIDE_RESOURCE_WILDCARD as well will reset everything.
+ */
+
+#define THREAD_QOS_OVERRIDE_TYPE_UNKNOWN (0)
+#define THREAD_QOS_OVERRIDE_TYPE_PTHREAD_MUTEX (1)
+#define THREAD_QOS_OVERRIDE_TYPE_PTHREAD_RWLOCK (2)
+#define THREAD_QOS_OVERRIDE_TYPE_PTHREAD_EXPLICIT_OVERRIDE (3)
+#define THREAD_QOS_OVERRIDE_TYPE_WILDCARD (5)
+
+/* A special resource value to indicate a resource wildcard */
+#define THREAD_QOS_OVERRIDE_RESOURCE_WILDCARD (~((user_addr_t)0))
+
+struct thread_qos_policy {
+ integer_t qos_tier;
+ integer_t tier_importance;
+};
+
+typedef struct thread_qos_policy thread_qos_policy_data_t;
+typedef struct thread_qos_policy *thread_qos_policy_t;
+
+#define THREAD_QOS_POLICY_COUNT ((mach_msg_type_number_t) \
+ (sizeof (thread_qos_policy_data_t) / sizeof (integer_t)))
+
+#endif /* PRIVATE */
+
+#ifdef PRIVATE
+
+/*
+ * Internal bitfields are privately exported for revlocked tracing tools like msa to decode tracepoints.
+ *
+ * These struct definitions *will* change in the future.
+ * When they do, we will update THREAD_POLICY_INTERNAL_STRUCT_VERSION.
+ */
+
+#define THREAD_POLICY_INTERNAL_STRUCT_VERSION 5
+
+// legacy names
+#define thrp_qos_ipc_override thrp_qos_kevent_override
+
+struct thread_requested_policy {
+ uint64_t thrp_int_darwinbg :1, /* marked as darwinbg via setpriority */
+ thrp_ext_darwinbg :1,
+ thrp_int_iotier :2, /* IO throttle tier */
+ thrp_ext_iotier :2,
+ thrp_int_iopassive :1, /* should IOs cause lower tiers to be throttled */
+ thrp_ext_iopassive :1,
+ thrp_latency_qos :3, /* Timer latency QoS */
+ thrp_through_qos :3, /* Computation throughput QoS */
+
+ thrp_pidbind_bg :1, /* task i'm bound to is marked 'watchbg' */
+ thrp_qos :3, /* thread qos class */
+ thrp_qos_relprio :4, /* thread qos relative priority (store as inverse, -10 -> 0xA) */
+ thrp_qos_override :3, /* thread qos class override */
+ thrp_qos_promote :3, /* thread qos class from promotion */
+ thrp_qos_kevent_override:3, /* thread qos class from kevent override */
+ thrp_terminated :1, /* heading for termination */
+ thrp_qos_sync_ipc_override:3, /* now unused */
+ thrp_qos_workq_override :3, /* thread qos class override (workq) */
+ thrp_qos_wlsvc_override :3, /* workloop servicer qos class override */
+
+ thrp_reserved :23;
+};
+
+struct thread_effective_policy {
+ uint64_t thep_darwinbg :1, /* marked as 'background', and sockets are marked bg when created */
+ thep_io_tier :2, /* effective throttle tier */
+ thep_io_passive :1, /* should IOs cause lower tiers to be throttled */
+ thep_all_sockets_bg :1, /* All existing sockets in process are marked as bg (thread: all created by thread) */
+ thep_new_sockets_bg :1, /* Newly created sockets should be marked as bg */
+ thep_terminated :1, /* all throttles have been removed for quick exit or SIGTERM handling */
+ thep_qos_ui_is_urgent :1, /* bump UI-Interactive QoS up to the urgent preemption band */
+ thep_latency_qos :3, /* Timer latency QoS level */
+ thep_through_qos :3, /* Computation throughput QoS level */
+
+ thep_qos :3, /* thread qos class */
+ thep_qos_relprio :4, /* thread qos relative priority (store as inverse, -10 -> 0xA) */
+ thep_qos_promote :3, /* thread qos class used for promotion */
+
+ thep_reserved :40;
+};
+
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