Windows下用C语言获取进程cpu使用率_内存使用_IO情况..doc

Windows下用C语言获取进程cpu使用率，内存使用，IO情况 一个项目需要，特地写了这些功能的函数。?process_stat.h的内容如下：? C代码?? /**?@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?__cplusplus?? extern?C?{?? #endif?? ?? ????typedef?long?long???????????int64_t;?? ????typedef?unsigned?long?long??uint64_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的内容如下：? C代码?? /**?@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();?? ????}?? ?? ????GetSystemTimeAsFile