Files
oceanbase/src/storage/blocksstable/ob_data_buffer.cpp
2022-04-08 14:00:52 +08:00

118 lines
3.1 KiB
C++

/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#include "ob_data_buffer.h"
#include <malloc.h>
#include "lib/allocator/ob_malloc.h"
using namespace oceanbase;
using namespace common;
namespace oceanbase {
namespace blocksstable {
ObSelfBufferWriter::ObSelfBufferWriter(const int64_t size, const char *label, const bool need_align)
: ObBufferWriter(NULL, 0, 0), label_(label), is_aligned_(need_align), macro_block_mem_ctx_()
{
int ret = OB_SUCCESS;
if (OB_FAIL(macro_block_mem_ctx_.init())) {
STORAGE_LOG(WARN, "fail to init macro block memory context.", K(ret));
} else if (OB_FAIL(ensure_space(size))) {
STORAGE_LOG(WARN, "cannot allocate memory for data buffer.", K(size), K(ret));
}
}
ObSelfBufferWriter::~ObSelfBufferWriter()
{
free();
is_aligned_ = false;
pos_ = 0;
capacity_ = 0;
macro_block_mem_ctx_.destroy();
}
char *ObSelfBufferWriter::alloc(const int64_t size)
{
char *data = NULL;
if (size == macro_block_mem_ctx_.get_block_size()) {
data = (char *)macro_block_mem_ctx_.alloc();
if (OB_ISNULL(data)) {
STORAGE_LOG(WARN, "fail to alloc buf from mem ctx", K(size));
}
}
// alloc from mem ctx fail
if (OB_ISNULL(data)) {
if (is_aligned_) {
data = (char *)ob_malloc_align(BUFFER_ALIGN_SIZE, size, label_);
} else {
data = (char *)ob_malloc(size, label_);
}
}
return data;
}
int ObSelfBufferWriter::ensure_space(int64_t size)
{
int ret = OB_SUCCESS;
// size = upper_align(size, DIO_ALIGN_SIZE);
if (size <= 0) {
// do nothing.
} else if (is_aligned_ && size % BUFFER_ALIGN_SIZE != 0) {
STORAGE_LOG(WARN, "not aligned buffer size", K(is_aligned_), K(size));
ret = OB_INVALID_ARGUMENT;
} else if (NULL == data_) {
if (NULL == (data_ = alloc(size))) {
STORAGE_LOG(WARN, "allocate buffer memory error.", K(size));
ret = OB_ALLOCATE_MEMORY_FAILED;
} else {
pos_ = 0;
capacity_ = size;
}
} else if (capacity_ < size) {
// resize;
char *new_data = NULL;
if (NULL == (new_data = alloc(size))) {
STORAGE_LOG(WARN, "allocate buffer memory error.", K(size));
ret = OB_ALLOCATE_MEMORY_FAILED;
} else {
MEMCPY(new_data, data_, pos_);
free();
capacity_ = size;
data_ = new_data;
}
}
return ret;
}
void ObSelfBufferWriter::free()
{
if (NULL != data_) {
#ifndef OB_USE_ASAN
if (macro_block_mem_ctx_.get_allocator().contains(data_)) {
macro_block_mem_ctx_.free(data_);
data_ = NULL;
}
#endif
if (NULL != data_) {
if (is_aligned_) {
ob_free_align(data_);
} else {
ob_free(data_);
}
data_ = NULL;
}
}
}
} // namespace blocksstable
} // namespace oceanbase