1 /* 2 * Copyright (C) 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 44 counter_u64_fetch_inline(uint64_t *p) 45 { 46 return (*p); 47 } 48 49 static inline void 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 59 counter_u64_add(counter_u64_t c, int64_t inc) 60 { 61 *c += inc; 62 } 63 64 #endif /* ! __FSTACK_MACHINE_COUNTER_H__ */ 65