Method Flush

util/system/file.cpp:473–502

}

bool TFileHandle::Flush() noexcept {
    if (!IsOpen()) {
        return false;
    }
#if defined(_win_)
    bool ok = ::FlushFileBuffers(Fd_) != 0;
    /*
     * FlushFileBuffers fails if hFile is a handle to the console output.
     * That is because the console output is not buffered.
     * The function returns FALSE, and GetLastError returns ERROR_INVALID_HANDLE.
     */
    return ok || GetLastError() == ERROR_INVALID_HANDLE;
#elif defined(_unix_)
    int ret = ::fsync(Fd_);

    /*
     * Ignore EROFS, EINVAL - fd is bound to a special file
     * (PIPE, FIFO, or socket) which does not support synchronization.
     * Fail in case of EIO, ENOSPC, EDQUOT - data might be lost.
     */
    return ret == 0 || errno == EROFS || errno == EINVAL
    #if defined(_darwin_)
           // ENOTSUP fd does not refer to a vnode
           || errno == ENOTSUP
    #endif
        ;
#else
    #error unsupported platform
#endif
}

bool TFileHandle::FlushData() noexcept {
#if defined(_linux_)