/* * Copyright (c) 2015 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@ */ #ifndef _SYS_ULOCK_H #define _SYS_ULOCK_H __BEGIN_DECLS #if PRIVATE #ifdef XNU_KERNEL_PRIVATE extern mach_port_name_t ipc_entry_name_mask(mach_port_name_t name); static __inline mach_port_name_t ulock_owner_value_to_port_name(uint32_t uval) { /* * userland uses the least significant bits for flags as these are * never used in the mach port name, and are generally always set by * the ipc_entry code in the kernel. Here we reconstruct a mach port * name that we can use in the kernel. */ return ipc_entry_name_mask((mach_port_name_t)uval); } #else static __inline mach_port_name_t ulock_owner_value_to_port_name(uint32_t uval) { return uval | 0x3; } #endif #ifndef KERNEL extern int __ulock_wait(uint32_t operation, void *addr, uint64_t value, uint32_t timeout); /* timeout is specified in microseconds */ extern int __ulock_wake(uint32_t operation, void *addr, uint64_t wake_value); #endif /* !KERNEL */ /* * operation bits [7, 0] contain the operation code */ #define UL_COMPARE_AND_WAIT 1 #define UL_UNFAIR_LOCK 2 /* obsolete names */ #define UL_OSSPINLOCK UL_COMPARE_AND_WAIT #define UL_HANDOFFLOCK UL_UNFAIR_LOCK /* These operation code are only implemented in (DEVELOPMENT || DEBUG) kernels */ #define UL_DEBUG_SIMULATE_COPYIN_FAULT 253 #define UL_DEBUG_HASH_DUMP_ALL 254 #define UL_DEBUG_HASH_DUMP_PID 255 /* * operation bits [15, 8] contain the flags for __ulock_wake */ #define ULF_WAKE_ALL 0x00000100 #define ULF_WAKE_THREAD 0x00000200 /* * operation bits [23, 16] contain the flags for __ulock_wait */ /* The waiter is contending on this lock for synchronization around global data. * This causes the workqueue subsystem to not create new threads to offset for * waiters on this lock. */ #define ULF_WAIT_WORKQ_DATA_CONTENTION 0x00010000 /* * operation bits [31, 24] contain the generic flags */ #define ULF_NO_ERRNO 0x01000000 /* * masks */ #define UL_OPCODE_MASK 0x000000FF #define UL_FLAGS_MASK 0xFFFFFF00 #define ULF_GENERIC_MASK 0xFFFF0000 #define ULF_WAIT_MASK (ULF_NO_ERRNO | \ ULF_WAIT_WORKQ_DATA_CONTENTION) #define ULF_WAKE_MASK (ULF_WAKE_ALL | \ ULF_WAKE_THREAD | \ ULF_NO_ERRNO) #endif /* PRIVATE */ __END_DECLS #endif