我有一个具有以下成员函数的类:
/// caller pid
virtual pid_t Pid() const = 0;
/// physical memory size in KB
virtual uint64_t Size() const = 0;
/// resident memory for this process
virtual uint64_t Rss() const = 0;
/// cpu used by this process
virtual double PercentCpu() const = 0;
/// memory used by this process
virtual double PercentMemory() const = 0;
/// number of threads in this process
virtual int32_t Lwps() const = 0;
这个类的职责是返回调用者的进程信息。物理内存大小可以很容易地通过 sysctl 调用确定,并且 pid 是微不足道的,但是除了在 ps 或 top 上调用 popen 并解析输出之外,其余的调用让我望而却步——这是 Not Acceptable 。任何帮助将不胜感激。
要求:
在 g++ 4.0 上编译
没有obj-c
OSX 10.5
最佳答案
进程信息来自pidinfo
:
cristi:~ diciu$ grep proc_pidinfo /usr/include/libproc.h
int proc_pidinfo(int pid, int flavor, uint64_t arg, void *buffer, int buffersize);
cpu负载来自host_statistics
:
cristi:~ diciu$ grep -r host_statistics /usr/include/
/usr/include/mach/host_info.h:/* host_statistics() */
/usr/include/mach/mach_host.defs:routine host_statistics(
/usr/include/mach/mach_host.h:/* Routine host_statistics */
/usr/include/mach/mach_host.h:kern_return_t host_statistics
欲了解更多详情,请查看 top
和 lsof
的来源,它们是开源的(您需要注册为 Apple 开发人员,但这是免费的):
https://opensource.apple.com/source/top/top-111.20.1/libtop.c.auto.html
稍后编辑:所有这些接口(interface)都是特定于版本的,因此在编写生产代码(libproc.h)时需要考虑到这一点:
/*
* This header file contains private interfaces to obtain process information.
* These interfaces are subject to change in future releases.
*/
关于c++ - 在 Darwin/OSX 中以编程方式确定进程信息,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/220323/