C/C++获取Windows系统CPU和内存及硬盘使用情况

//1.获取Windows系统内存使用率

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//windows 内存 使用率

DWORD getWin_MemUsage(){

MEMORYSTATUS ms;

::GlobalMemoryStatus(&ms);

return ms.dwMemoryLoad;

}

//2.获取windowsCPU使用率

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__int64 CompareFileTime(FILETIME time1, FILETIME time2)

{

__int64 a = time1.dwHighDateTime << 32 | time1.dwLowDateTime;

__int64 b = time2.dwHighDateTime << 32 | time2.dwLowDateTime;

return (b - a);

}

//WIN CPU使用情况

void getWin_CpuUsage(){

HANDLE hEvent;

BOOL res;

FILETIME preidleTime;

FILETIME prekernelTime;

FILETIME preuserTime;

FILETIME idleTime;

FILETIME kernelTime;

FILETIME userTime;

res = GetSystemTimes(&idleTime, &kernelTime, &userTime);

preidleTime = idleTime;

prekernelTime = kernelTime;

preuserTime = userTime;

hEvent = CreateEventA(NULL, FALSE, FALSE, NULL); // 初始值为 nonsignaled ，并且每次触发后自动设置为nonsignaled

while (true){

WaitForSingleObject(hEvent, 1000);

res = GetSystemTimes(&idleTime, &kernelTime, &userTime);

__int64 idle = CompareFileTime(preidleTime, idleTime);

__int64 kernel = CompareFileTime(prekernelTime, kernelTime);

__int64 user = CompareFileTime(preuserTime, userTime);

__int64 cpu = (kernel + user - idle) * 100 / (kernel + user);

__int64 cpuidle = (idle)* 100 / (kernel + user);

cout << "CPU利用率:" << cpu << "%" << " CPU空闲率:" << cpuidle << "%" << endl;

preidleTime = idleTime;

prekernelTime = kernelTime;

preuserTime = userTime;

}

}

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//获取 WIN 硬盘使用情况

int getWin_DiskUsage(){

int DiskCount = 0;

DWORD DiskInfo = GetLogicalDrives();

//利用GetLogicalDrives()函数可以获取系统中逻辑驱动器的数量，函数返回的是一个32位无符号整型数据。

while (DiskInfo)//通过循环操作查看每一位数据是否为1，如果为1则磁盘为真,如果为0则磁盘不存在。

{

if (DiskInfo & 1)//通过位运算的逻辑与操作，判断是否为1

{

++DiskCount;

}

DiskInfo = DiskInfo >> 1;//通过位运算的右移操作保证每循环一次所检查的位置向右移动一位。

//DiskInfo = DiskInfo/2;

}

cout << "Logical Disk Number:" << DiskCount << endl;

//-----------------------------------------------------------------------------------------

int DSLength = GetLogicalDriveStrings(0, NULL);

//通过GetLogicalDriveStrings()函数获取所有驱动器字符串信息长度。

char* DStr = new char[DSLength];//用获取的长度在堆区创建一个c风格的字符串数组

GetLogicalDriveStrings(DSLength, (LPTSTR)DStr);

//通过GetLogicalDriveStrings将字符串信息复制到堆区数组中,其中保存了所有驱动器的信息。

int DType;

int si = 0;

BOOL fResult;

unsigned _int64 i64FreeBytesToCaller;

unsigned _int64 i64TotalBytes;

unsigned _int64 i64FreeBytes;

for (int i = 0; i<DSLength / 4; ++i)//为了显示每个驱动器的状态，则通过循环输出实现，由于DStr内部保存的数据是A:\NULLB:\NULLC:\NULL，这样的信息，所以DSLength/4可以获得具体大循环范围

{

char dir[3] = { DStr[si], '：', '\\' };

cout << dir;

DType = GetDriveType(DStr + i * 4);

//GetDriveType函数，可以获取驱动器类型，参数为驱动器的根目录

if (DType == DRIVE_FIXED)

{

cout << "Hard Disk";

}

else if (DType == DRIVE_CDROM)

{

cout << "CD-ROM";

}

else if (DType == DRIVE_REMOVABLE)

{

cout << "Removable Disk";

}

else if (DType == DRIVE_REMOTE)

{

cout << "Network Disk";

}

else if (DType == DRIVE_RAMDISK)

{

cout << "Virtual RAM Disk";

}

else if (DType == DRIVE_UNKNOWN)

{

cout << "Unknown Device";

}

fResult = GetDiskFreeSpaceEx(

dir,

(PULARGE_INTEGER)&i64FreeBytesToCaller,

(PULARGE_INTEGER)&i64TotalBytes,

(PULARGE_INTEGER)&i64FreeBytes);

//GetDiskFreeSpaceEx函数，可以获取驱动器磁盘的空间状态,函数返回的是个BOOL类型数据

if (fResult)//通过返回的BOOL数据判断驱动器是否在工作状态

{

cout << " totalspace:" << (float)i64TotalBytes / 1024 / 1024 << " MB";//磁盘总容量

cout << " freespace:" << (float)i64FreeBytesToCaller / 1024 / 1024 << " MB";//磁盘剩余空间

}

else

{

cout << " 设备未准备好";

}

cout << endl;

si += 4;

}

return 0;

}

//main函数

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int main( int argc, char **argv )

{

//+++======================获取windows 内存使用率==================+++//

DWORD dwValue = getWin_MemUsage();

printf("内存使用率为 %d %% \n",dwValue);

//+++======================获取Windows CPU使用率====================+++//

//getWin_CpuUsage();

//+++======================获取Windows 硬盘使用====================+++//

getWin_DiskUsage();

return 0;

}