Add lock file

src/utils/lock_file.cpp

@@ -0,0 +1,18 @@
+#include <utils/lock_file.hpp>
+
+#include <unistd.h>
+#include <sys/file.h>
+
+namespace utils::filesystem {
+void LockFile::Lock() {
+  fd_ = open(path_.data(), O_RDWR | O_CREAT, 0666);
+  while (flock(fd_, LOCK_EX) != 0) {
+  }
+}
+
+void LockFile::Unlock() {
+  while (flock(fd_, LOCK_UN) != 0) {
+  }
+  close(fd_);
+}
+}  // namespace utils::filesystem