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Diffstat (limited to '')
| -rw-r--r-- | src/buffer.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/buffer.h b/src/buffer.h new file mode 100644 index 0000000..ab46f9b --- /dev/null +++ b/src/buffer.h @@ -0,0 +1,116 @@ +/* + * 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 |