xref: /f-stack/lib/include/machine/counter.h (revision 2317ada5)

/*
 * Copyright (C) 2017-2021 THL A29 Limited, a Tencent company.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef __FSTACK_MACHINE_COUNTER_H__
#define __FSTACK_MACHINE_COUNTER_H__

#include <sys/pcpu.h>

#define	EARLY_COUNTER   &pcpup->pc_early_dummy_counter

#define	COUNTER_U64_DEFINE_EARLY(c)         \
    counter_u64_t __read_mostly c = (void *)__offsetof(struct pcpu, pc_early_dummy_counter);        \
    COUNTER_U64_SYSINIT(c)

#define counter_enter()    do {} while (0)
#define counter_exit()    do {} while (0)

#ifdef IN_SUBR_COUNTER_C

static inline uint64_t
counter_u64_fetch_inline(uint64_t *p)
{
    return (*p);
}

static inline void
counter_u64_zero_inline(counter_u64_t c)
{
    *c = 0;
}
#endif

#define counter_u64_add_protected(c, i)    counter_u64_add(c, i)

static inline void
counter_u64_add(counter_u64_t c, int64_t inc)
{
    *c += inc;
}

#endif    /* ! __FSTACK_MACHINE_COUNTER_H__ */