40   size_t read_head = read_head_.load(std::memory_order_relaxed);  in GetFreeSize()  local
41   size_t write_tail = read_head > 0 ? read_head - 1 : buffer_size_ - 1;  in GetFreeSize()
50   size_t read_head = read_head_.load(std::memory_order_acquire);  in AllocWriteSpace()  local
51   size_t write_tail = read_head > 0 ? read_head - 1 : buffer_size_ - 1;  in AllocWriteSpace()
81   size_t read_head = read_head_.load(std::memory_order_relaxed);  in GetCurrentRecord()  local
82   if (read_head == write_head) {  in GetCurrentRecord()
86   if (read_head > write_head) {  in GetCurrentRecord()
87     if (buffer_size_ - read_head < sizeof(header) ||  in GetCurrentRecord()
88         (memcpy(&header, buffer_.get() + read_head, sizeof(header)) && header.size == 0)) {  in GetCurrentRecord()
90       cur_read_record_size_ += buffer_size_ - read_head;  in GetCurrentRecord()
91       read_head = 0;  in GetCurrentRecord()
95     memcpy(&header, buffer_.get() + read_head, sizeof(header));  in GetCurrentRecord()
98   return buffer_.get() + read_head;  in GetCurrentRecord()
102   size_t read_head = read_head_.load(std::memory_order_relaxed);  in MoveToNextRecord()  local
103   read_head = (read_head + cur_read_record_size_) % buffer_size_;  in MoveToNextRecord()
104   read_head_.store(read_head, std::memory_order_release);  in MoveToNextRecord()