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