计算num_cpus时,gutil的sysinfo.cc是否缺少右括号?

时间:2019-02-06 00:05:21

标签: c++ sysinfo

我有gutil的sysinfo.cc文件,与该文件相同: https://github.com/cloudera/kudu/blob/master/src/kudu/gutil/sysinfo.cc#L248 我想知道InitializeSystemInfo()函数是否可以在Linux上正常工作,因为我对C ++不太熟悉。

我在第248行上找不到此do语句的右括号,因此它仍然可以正确计算numcpus吗?

 do {   // we'll exit when the last read didn't read anything
    // Move the next line to the beginning of the buffer
    const int oldlinelen = strlen(line);
    if (sizeof(line) == oldlinelen + 1)    // oldlinelen took up entire line
      line[0] = '\0';
    else                                   // still other lines left to save
      memmove(line, line + oldlinelen+1, sizeof(line) - (oldlinelen+1));
    // Terminate the new line, reading more if we can't find the newline
    char* newline = strchr(line, '\n');
    if (newline == NULL) {
      const int linelen = strlen(line);
      const int bytes_to_read = sizeof(line)-1 - linelen;
      CHECK_GT(bytes_to_read, 0);  // because the memmove recovered >=1 bytes
      chars_read = read(fd, line + linelen, bytes_to_read);
      line[linelen + chars_read] = '\0';
      newline = strchr(line, '\n');
    }
    if (newline != NULL)
      *newline = '\0';

1 个答案:

答案 0 :(得分:0)

右括号在第305行。

此文件中的编程风格很难阅读,因为该函数有几个屏幕长,并且使用多个#ifdef分支。虽然有必要。此源文件在其余代码中隐藏了特定于操作系统的部分,因此看起来可能很复杂。

其他代码只能访问cpuinfo_cycles_per_second变量,这使API变得非常简单。