117 lines
4 KiB
C
117 lines
4 KiB
C
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/*
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* Copyright 2019-2021 OARC, Inc.
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* Copyright 2017-2018 Akamai Technologies
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* Copyright 2006-2016 Nominum, Inc.
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* All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef PERF_BUFFER_H
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#define PERF_BUFFER_H 1
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#include <stddef.h>
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typedef struct perf_region {
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void* base;
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size_t length;
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} perf_region_t;
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typedef struct perf_buffer {
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void* base;
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size_t length, used, current, active;
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} perf_buffer_t;
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#include <assert.h>
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#define perf_buffer_init(b, _base, _length) \
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{ \
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(b)->base = _base; \
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(b)->length = _length; \
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(b)->used = 0; \
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(b)->current = 0; \
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(b)->active = 0; \
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}
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#define perf_buffer_add(b, n) \
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{ \
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assert((b)->used + n <= (b)->length); \
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(b)->used += (n); \
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}
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#define perf_buffer_length(b) ((b)->length)
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#define perf_buffer_availablelength(b) ((b)->length - (b)->used)
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#define perf_buffer_base(b) ((b)->base)
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#define perf_buffer_clear(b) \
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{ \
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(b)->used = 0; \
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(b)->current = 0; \
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(b)->active = 0; \
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}
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#define perf_buffer_putmem(b, base, length) \
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{ \
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assert(perf_buffer_availablelength(b) >= length); \
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memcpy(perf_buffer_used(b), base, length); \
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perf_buffer_add(b, length); \
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}
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#define perf_buffer_putuint8(b, _val) \
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{ \
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unsigned char* _cp; \
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uint8_t _val2 = (_val); \
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assert(perf_buffer_availablelength(b) >= 1U); \
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_cp = perf_buffer_used(b); \
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(b)->used += 1U; \
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_cp[0] = _val2; \
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}
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#define perf_buffer_putuint16(b, _val) \
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{ \
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unsigned char* _cp; \
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uint16_t _val2 = (_val); \
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assert(perf_buffer_availablelength(b) >= 2U); \
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_cp = perf_buffer_used(b); \
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(b)->used += 2U; \
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_cp[0] = _val2 >> 8; \
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_cp[1] = _val2; \
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}
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#define perf_buffer_putuint32(b, _val) \
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{ \
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unsigned char* _cp; \
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uint32_t _val2 = (_val); \
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assert(perf_buffer_availablelength(b) >= 4U); \
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_cp = perf_buffer_used(b); \
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(b)->used += 4U; \
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_cp[0] = _val2 >> 24; \
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_cp[1] = _val2 >> 16; \
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_cp[2] = _val2 >> 8; \
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_cp[3] = _val2; \
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}
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#define perf_buffer_copyregion(b, r) perf_buffer_putmem(b, (r)->base, (r)->length)
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#define perf_buffer_used(b) ((void*)((unsigned char*)(b)->base + (b)->used))
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#define perf_buffer_usedlength(b) ((b)->used)
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#define perf_buffer_usedregion(b, r) \
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{ \
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(r)->base = (b)->base; \
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(r)->length = (b)->used; \
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}
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#endif
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