/* * 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@ */ #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) { os_atomic_add(zpercpu_get(*counter), amount, relaxed); } OS_OVERLOADABLE void counter_inc(scalable_counter_t *counter) { os_atomic_inc(zpercpu_get(*counter), relaxed); } OS_OVERLOADABLE void counter_dec(scalable_counter_t *counter) { os_atomic_dec(zpercpu_get(*counter), relaxed); } /* * NB: On arm, the preemption disabled implementation is the same as * the normal implementation. Otherwise we would need to enforce that * callers never mix the interfaces for the same counter. */ OS_OVERLOADABLE void counter_add_preemption_disabled(scalable_counter_t *counter, uint64_t amount) { counter_add(counter, amount); } OS_OVERLOADABLE void counter_inc_preemption_disabled(scalable_counter_t *counter) { counter_inc(counter); } OS_OVERLOADABLE void counter_dec_preemption_disabled(scalable_counter_t *counter) { counter_dec(counter); }