/* * 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
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* 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
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*/
#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);
}