ZYM/BH-Bookstore-2023
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

upd: optimize database

Browse Source
This commit is contained in:
ZhuangYumin
2023-12-04 08:14:27 +00:00
parent 01864d5a5e
commit e76bdbd436
2 changed files with 34 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
backend/include/drivearray.hpp
View File

@ -41,33 +41,35 @@ class DriveArray {
virtual_mem = mmap(nullptr, file_length, PROT_READ | PROT_WRITE, MAP_SHARED,
file_descriptor, 0);
}
void ForceRefresh() noexcept {
munmap(virtual_mem, file_length);
virtual_mem = mmap(nullptr, file_length, PROT_READ | PROT_WRITE, MAP_SHARED,
file_descriptor, 0);
}
public:
DriveArray() = default;
inline bool IsOpen() const noexcept { return file_descriptor >= 0; }
~DriveArray() {
reallocate(true);
int stk_data_begin =
raw_data_begin +
(sizeofT * total_mem + kPageSize - 1) / kPageSize * kPageSize;
*((int *)(virtual_mem) + info_len) = total_mem;
*((int *)(virtual_mem) + info_len + 1) = (int)free_mem.size();
int *p = (int *)(virtual_mem + stk_data_begin);
while (!free_mem.empty()) {
*(p++) = free_mem.top();
free_mem.pop();
if (file_descriptor >= 0) {
reallocate(true);
int stk_data_begin =
raw_data_begin +
(sizeofT * total_mem + kPageSize - 1) / kPageSize * kPageSize;
*((int *)(virtual_mem) + info_len) = total_mem;
*((int *)(virtual_mem) + info_len + 1) = (int)free_mem.size();
int *p = (int *)(virtual_mem + stk_data_begin);
while (!free_mem.empty()) {
*(p++) = free_mem.top();
free_mem.pop();
}
munmap(virtual_mem, file_length);
close(file_descriptor);
file_descriptor = -1;
}
munmap(virtual_mem, file_length);
close(file_descriptor);
file_descriptor = -1;
}
bool operator=(const DriveArray &) = delete;
void ForceRefresh() noexcept {
munmap(virtual_mem, file_length);
virtual_mem = mmap(nullptr, file_length, PROT_READ | PROT_WRITE, MAP_SHARED,
file_descriptor, 0);
}
void *RawData() noexcept { return virtual_mem; }
void OpenFile(const std::string &file_name) {
if (file_name == "") return;
if (file_descriptor >= 0) {