Windows uses C language to get process CPU usage, memory usage, IO condition

#ifndef PROCESS_STAT_H#define PROCESS_STAT_H#ifdef __cplusplusextern“C” {#endiftypedeflonglongint64_t;typedefunsigned longlong uint64_t;/// 获取当前进程的cpu使用率，返回-1失败intget_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intget_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intget_io_bytes(uint64_t* read_bytes, uint64_t* write_bytes);#ifdef __cplusplus}#endif#endif/*PROCESS_STAT_H*//*** 需要连接到psapi.lib*/#include#include #include#include “process_stat.h”/// 时间转换staticuint64_t file_time_2_utc(constFILETIME* ftime){LARGE_INTEGER li;assert(ftime);li.LowPart = ftime->dwLowDateTime;li.HighPart = ftime->dwHighDateTime;returnli.QuadPart;}/// 获得CPU的核数staticintget_processor_number(){SYSTEM_INFO info;GetSystemInfo(&info);return(int)info.dwNumberOfProcessors;}intget_cpu_usage(){//cpu数量staticintprocessor_count_ = -1;//上一次的时间static int64_t last_time_ = 0;staticint64_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 TaskManager)// we may call this function on a process that has just exited butwe 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;returncpu;}intget_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;}intget_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;return0;}return-1;}#include “process_stat.h”#include#includeintmain(){while(1){intcpu;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);}return0;}

Windows uses C language to get process CPU usage, memory usage, IO condition