/* * Copyright (c) 2020 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@ */ /* * Mach Operating System * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ #include <kern/assert.h> #include <kern/cpu_data.h> #include <kern/counter.h> #include <kern/zalloc.h> #include <machine/atomic.h> #include <machine/machine_routines.h> #include <machine/cpu_number.h> OS_OVERLOADABLE void counter_add(scalable_counter_t *counter, uint64_t amount) { disable_preemption(); (*zpercpu_get(*counter)) += amount; enable_preemption(); } OS_OVERLOADABLE void counter_inc(scalable_counter_t *counter) { disable_preemption(); (*zpercpu_get(*counter))++; enable_preemption(); } OS_OVERLOADABLE void counter_dec(scalable_counter_t *counter) { disable_preemption(); (*zpercpu_get(*counter))--; enable_preemption(); } OS_OVERLOADABLE void counter_add_preemption_disabled(scalable_counter_t *counter, uint64_t amount) { (*zpercpu_get(*counter)) += amount; } OS_OVERLOADABLE void counter_inc_preemption_disabled(scalable_counter_t *counter) { (*zpercpu_get(*counter))++; } OS_OVERLOADABLE void counter_dec_preemption_disabled(scalable_counter_t *counter) { (*zpercpu_get(*counter))--; }