/* * Copyright (c) 2000-2007 Apple 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 * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * 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. * * 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, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * 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@ */ /* * @OSF_COPYRIGHT@ */ #ifndef _KERN_KERN_TYPES_H_ #define _KERN_KERN_TYPES_H_ #include <stdint.h> #include <mach/mach_types.h> #include <mach/machine/vm_types.h> #ifdef KERNEL_PRIVATE #ifndef MACH_KERNEL_PRIVATE struct zone ; #ifndef __LP64__ struct wait_queue { unsigned int opaque[2]; uintptr_t opaquep[2]; } ; #else struct wait_queue { unsigned char opaque[32]; }; #endif #endif /* MACH_KERNEL_PRIVATE */ typedef struct zone *zone_t; #define ZONE_NULL ((zone_t) 0) typedef struct wait_queue *wait_queue_t; #define WAIT_QUEUE_NULL ((wait_queue_t) 0) #define SIZEOF_WAITQUEUE sizeof(struct wait_queue) typedef vm_offset_t ipc_kobject_t; #define IKO_NULL ((ipc_kobject_t) 0) #endif /* KERNEL_PRIVATE */ typedef void *event_t; /* wait event */ #define NO_EVENT ((event_t) 0) typedef uint64_t event64_t; /* 64 bit wait event */ #define NO_EVENT64 ((event64_t) 0) #define CAST_EVENT64_T(a_ptr) ((event64_t)((uintptr_t)(a_ptr))) /* * Possible wait_result_t values. */ typedef int wait_result_t; #define THREAD_WAITING -1 /* thread is waiting */ #define THREAD_AWAKENED 0 /* normal wakeup */ #define THREAD_TIMED_OUT 1 /* timeout expired */ #define THREAD_INTERRUPTED 2 /* aborted/interrupted */ #define THREAD_RESTART 3 /* restart operation entirely */ #define THREAD_NOT_WAITING 10 /* thread didn't need to wait */ typedef void (*thread_continue_t)(void *, wait_result_t); #define THREAD_CONTINUE_NULL ((thread_continue_t) 0) /* * Interruptible flag for waits. * * THREAD_UNINT: Uninterruptible wait * Wait will only end when someone explicitly wakes up the thread, or if the * wait timeout expires. * * Use this state if the system as a whole cannot recover from a thread being * interrupted out of the wait. * * THREAD_INTERRUPTIBLE: * Wait will end if someone explicitly wakes up the thread, the wait timeout * expires, or the current thread is being terminated. * * This value can be used when your operation may not be cleanly restartable * for the current process or thread (i.e. the loss of state would be only visible * to the current client). Since the thread is exiting anyways, you're willing * to cut the operation short. The system as a whole must be able to cleanly * deal with the interruption (i.e. remain in a consistent and recoverable state). * * THREAD_ABORTSAFE: * Wait will end if someone explicitly wakes up the thread, the wait timeout * expires, the current thread is being terminated, if any signal arrives for * the task, or thread_abort_safely() is called on the thread. * * Using this value means that you are willing to be interrupted in the face * of any user signal, and safely rewind the thread back to the user/kernel * boundary. Many syscalls will try to restart the operation they were performing * after the signal has been handled. * * You must provide this value for any unbounded wait - otherwise you will * pend user signals forever. * * Thread interrupt mask: * * The current maximum interruptible state for the thread, as set by * thread_interrupt_level(), will limit the conditions that will cause a wake. * This is useful for code that can't be interrupted to set before calling code * that doesn't know that. * * Thread termination vs safe abort: * * Termination abort: thread_abort(), thread_terminate() * * A termination abort is sticky. Once a thread is marked for termination, every * THREAD_INTERRUPTIBLE wait will return immediately with THREAD_INTERRUPTED * until the thread successfully exits. * * Safe abort: thread_abort_safely() * * A safe abort is not sticky. The current wait, (or the next wait if the thread * is not currently waiting) will be interrupted, but then the abort condition is cleared. * The next wait will sleep as normal. Safe aborts only have a single effect. * * The path back to the user/kernel boundary must not make any further unbounded * wait calls. The waiter should detect the THREAD_INTERRUPTED return code * from an ABORTSAFE wait and return an error code that causes its caller * to understand that the current operation has been interrupted, and its * caller should return a similar error code, and so on until the * user/kernel boundary is reached. For Mach, the error code is usually KERN_ABORTED, * for BSD it is EINTR. * * Debuggers rely on the safe abort mechanism - a signaled thread must return to * the AST at the user/kernel boundary for the debugger to finish attaching. * * No wait/block will ever disappear a thread out from under the waiter. The block * call will always either return or call the passed in continuation. */ typedef int wait_interrupt_t; #define THREAD_UNINT 0 /* not interruptible */ #define THREAD_INTERRUPTIBLE 1 /* may not be restartable */ #define THREAD_ABORTSAFE 2 /* abortable safely */ typedef int wait_timeout_urgency_t; #define TIMEOUT_URGENCY_SYS_NORMAL 0x00 /* use default leeway thresholds for system */ #define TIMEOUT_URGENCY_SYS_CRITICAL 0x01 /* use critical leeway thresholds for system */ #define TIMEOUT_URGENCY_SYS_BACKGROUND 0x02 /* use background leeway thresholds for system */ #define TIMEOUT_URGENCY_USER_MASK 0x10 /* mask to identify user timeout urgency classes */ #define TIMEOUT_URGENCY_USER_NORMAL 0x10 /* use default leeway thresholds for user */ #define TIMEOUT_URGENCY_USER_CRITICAL 0x11 /* use critical leeway thresholds for user */ #define TIMEOUT_URGENCY_USER_BACKGROUND 0x12 /* use background leeway thresholds for user */ #define TIMEOUT_URGENCY_MASK 0x13 /* mask to identify timeout urgency */ #define TIMEOUT_URGENCY_LEEWAY 0x20 /* don't ignore provided leeway value */ #define TIMEOUT_URGENCY_FIRST_AVAIL 0x40 /* first available bit outside of urgency mask/leeway */ #ifdef KERNEL_PRIVATE #ifdef MACH_KERNEL_PRIVATE #include <kern/misc_protos.h> typedef struct clock *clock_t; typedef struct mig_object *mig_object_t; #define MIG_OBJECT_NULL ((mig_object_t) 0) typedef struct mig_notify *mig_notify_t; #define MIG_NOTIFY_NULL ((mig_notify_t) 0) typedef struct pset_node *pset_node_t; #define PSET_NODE_NULL ((pset_node_t) 0) typedef struct affinity_set *affinity_set_t; #define AFFINITY_SET_NULL ((affinity_set_t) 0) typedef struct run_queue *run_queue_t; #define RUN_QUEUE_NULL ((run_queue_t) 0) typedef struct grrr_run_queue *grrr_run_queue_t; #define GRRR_RUN_QUEUE_NULL ((grrr_run_queue_t) 0) typedef struct grrr_group *grrr_group_t; #define GRRR_GROUP_NULL ((grrr_group_t) 0) #else /* MACH_KERNEL_PRIVATE */ struct wait_queue_set ; struct _wait_queue_link ; #endif /* MACH_KERNEL_PRIVATE */ typedef struct wait_queue_set *wait_queue_set_t; #define WAIT_QUEUE_SET_NULL ((wait_queue_set_t)0) #define SIZEOF_WAITQUEUE_SET wait_queue_set_size() typedef struct _wait_queue_link *wait_queue_link_t; #define WAIT_QUEUE_LINK_NULL ((wait_queue_link_t)0) #define SIZEOF_WAITQUEUE_LINK wait_queue_link_size() /* legacy definitions - going away */ struct wait_queue_sub ; typedef struct wait_queue_sub *wait_queue_sub_t; #define WAIT_QUEUE_SUB_NULL ((wait_queue_sub_t)0) #define SIZEOF_WAITQUEUE_SUB wait_queue_set_size() #endif /* KERNEL_PRIVATE */ #endif /* _KERN_KERN_TYPES_H_ */