Windows下用C语言获取进程cpu使用率，内存使用，IO情况

转自： http://zhangyafeikimi.iteye.com/blog/378658

 

process_stat.h

/** @file* @brief 进程统计信息函数的声明* @author 张亚霏* @date 2009/05/03* @version 0.1**/#ifndef PROCESS_STAT_H#define PROCESS_STAT_H#ifdef __cplusplusextern "C" {#endiftypedef long long int64_t;typedef unsigned long longuint64_t;/// 获取当前进程的cpu使用率，返回-1失败int get_cpu_usage();/// 获取当前进程内存和虚拟内存使用量，返回-1失败，0成功int get_memory_usage(uint64_t* mem, uint64_t* vmem);/// 获取当前进程总共读和写的IO字节数，返回-1失败，0成功int get_io_bytes(uint64_t* read_bytes, uint64_t* write_bytes);#ifdef __cplusplus}#endif#endif/*PROCESS_STAT_H*/ 

process_stat_win.c

/** @file* @brief 进程统计信息函数的实现* @author 张亚霏* @date 2009/05/03* @version 0.1** 部分代码来自MSDN的例子* 部分代码来自google chromium项目** 需要连接到psapi.lib*/#include <windows.h>#include <psapi.h>#include <assert.h>#include "process_stat.h"/// 时间转换static uint64_t file_time_2_utc(const FILETIME* ftime){LARGE_INTEGER li;assert(ftime);li.LowPart = ftime->dwLowDateTime;li.HighPart = ftime->dwHighDateTime;return li.QuadPart;}/// 获得CPU的核数static int get_processor_number(){SYSTEM_INFO info;GetSystemInfo(&info);return (int)info.dwNumberOfProcessors;}int get_cpu_usage(){//cpu数量static int processor_count_ = -1;//上一次的时间static int64_t last_time_ = 0;static int64_t last_system_time_ = 0;FILETIME now;FILETIME creation_time;FILETIME exit_time;FILETIME kernel_time;FILETIME user_time;int64_t system_time;int64_t time;int64_t system_time_delta;int64_t time_delta;int cpu = -1;if(processor_count_ == -1){processor_count_ = get_processor_number();}GetSystemTimeAsFileTime(&now);if (!GetProcessTimes(GetCurrentProcess(), &creation_time, &exit_time,&kernel_time, &user_time)){// We don't assert here because in some cases (such as in the Task Manager)// we may call this function on a process that has just exited but we have// not yet received the notification.return -1;}system_time = (file_time_2_utc(&kernel_time) + file_time_2_utc(&user_time)) /processor_count_;time = file_time_2_utc(&now);if ((last_system_time_ == 0) || (last_time_ == 0)){// First call, just set the last values.last_system_time_ = system_time;last_time_ = time;return -1;}system_time_delta = system_time - last_system_time_;time_delta = time - last_time_;assert(time_delta != 0);if (time_delta == 0)return -1;// We add time_delta / 2 so the result is rounded.cpu = (int)((system_time_delta * 100 + time_delta / 2) / time_delta);last_system_time_ = system_time;last_time_ = time;return cpu;}int get_memory_usage(uint64_t* mem, uint64_t* vmem){PROCESS_MEMORY_COUNTERS pmc;if(GetProcessMemoryInfo(GetCurrentProcess(), &pmc, sizeof(pmc))){if(mem) *mem = pmc.WorkingSetSize;if(vmem) *vmem = pmc.PagefileUsage;return 0;}return -1;}int get_io_bytes(uint64_t* read_bytes, uint64_t* write_bytes){IO_COUNTERS io_counter;if(GetProcessIoCounters(GetCurrentProcess(), &io_counter)){if(read_bytes) *read_bytes = io_counter.ReadTransferCount;if(write_bytes) *write_bytes = io_counter.WriteTransferCount;return 0;}return -1;} 

可以这样使用：

/** @file* @brief 进程统计信息函数的测试* @author 张亚霏* @date 2009/05/03* @version 0.1**/#include "process_stat.h"#include <stdio.h>#include <Windows.h>int main() { while(1) {int cpu;uint64_t mem, vmem, r, w;cpu = get_cpu_usage();get_memory_usage(&mem, &vmem);get_io_bytes(&r, &w);printf("CPU使用率: %u/n",cpu);printf("内存使用: %u 字节/n", mem);printf("虚拟内存使用: %u 字节/n", vmem);printf("总共读: %u 字节/n", r);printf("总共写: %u 字节/n", w); Sleep(1000); } return 0; } 

 

 

另外，可参考：

Windows API一日一练(91)GetProcessMemoryInfo函数