1 /*
2 * Copyright (C) 2017-2021 THL A29 Limited, a Tencent company.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
18 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 */
26
27 #ifndef __FSTACK_MACHINE_COUNTER_H__
28 #define __FSTACK_MACHINE_COUNTER_H__
29
30 #include <sys/pcpu.h>
31
32 #define EARLY_COUNTER &pcpup->pc_early_dummy_counter
33
34 #define COUNTER_U64_DEFINE_EARLY(c) \
35 counter_u64_t __read_mostly c = (void *)__offsetof(struct pcpu, pc_early_dummy_counter); \
36 COUNTER_U64_SYSINIT(c)
37
38 #define counter_enter() do {} while (0)
39 #define counter_exit() do {} while (0)
40
41 #ifdef IN_SUBR_COUNTER_C
42
43 static inline uint64_t
counter_u64_fetch_inline(uint64_t * p)44 counter_u64_fetch_inline(uint64_t *p)
45 {
46 return (*p);
47 }
48
49 static inline void
counter_u64_zero_inline(counter_u64_t c)50 counter_u64_zero_inline(counter_u64_t c)
51 {
52 *c = 0;
53 }
54 #endif
55
56 #define counter_u64_add_protected(c, i) counter_u64_add(c, i)
57
58 static inline void
counter_u64_add(counter_u64_t c,int64_t inc)59 counter_u64_add(counter_u64_t c, int64_t inc)
60 {
61 *c += inc;
62 }
63
64 #endif /* ! __FSTACK_MACHINE_COUNTER_H__ */
65