DELPHI获取内存及CPU信息的函数

Uses MemoryCpuUtils;//首先引用该单元

//声明下列变量用来存储读取的数值
Var
iTotalPhysics, iTotalVirtual, iTotalPageFile,
iCurPhysics, iCurVirtual, iCurPageFile : DWord;

//CPU数量
Format('系统中共有 %d 个CPU中央存储器',[GetCPUCount]);
//其中i表示获取第几个CPU的使用率
Format('CPU使用率为 #%d - %5.2f%%',[i,GetCPUUsage(i)*100]);
//初始化OR读取各内存总量
GetMemoryTotalSize(iTotalPhysics ,iTotalVirtual ,iTotalPageFile);
//物理内存总量
InttoStr(Round(iTotalPhysics/1024/1024)) + ' MB';
//虚拟内存总量
InttoStr(Round(iTotalVirtual/1024/1024)) + ' MB';
//页面内存(交换内存)总量
InttoStr(Round(iTotalPageFile/1024/1024)) + ' MB';
//读取各内存当前可用容量
GetMemoryTotalSize(iCurPhysics,iCurVirtual,iCurPageFile);
//物理内存可用容量
InttoStr(Round(iCurPhysics/1024/1024)) + ' MB';
//虚拟内存可用容量
InttoStr(Round(iCurVirtual/1024/1024)) + ' MB';
//页面内存(交换内存)可用容量
InttoStr(Round(iCurPageFile/1024/1024)) + ' MB';
//获取内存使用率
Format('当前内存使用率为 %5.2f%%',[GetMemoryUsage]);
//直接获取CPU厂商
GetCPUVendor

那么如何计算当前各内存使用比例呢？
//物理内存使用比
Format('物理内存使用比为 %5.2f%%',[iCurPhysics/iTotalPhysics*100]);
//虚拟内存使用比
Format('虚拟内存使用比为 %5.2f%%',[iCurVirtual/iTotalVirtual*100]);
//页面内存使用比
Format('页面内存使用比为 %5.2f%%',[iCurPageFile/iTotalPageFile*100]);




下载后直接引用即可，如果您还不是会员，可以直接COPY下面的代码。


{==================================================================}
{ Get Memory And Cpu Informations Utils }
{==================================================================}

Unit MemoryCpuUtils;

interface

Uses
Windows, SysUtils;

type
TVendor = array[0..11] of Char;

{内存区}
//获取物理内存、虚拟内存、交换区(页面)内存的总容量，做初始化动作。
procedure GetMemoryTotalSize(Var iPhysicsMemoryTotalSize,
iVirtualMemoryTotalSize,
iPageFileMemoryTotalSize : DWORD);

//获取当前物理内存、虚拟内存、交换区(页面)内存的实时可用容量，做监控显示动作。
procedure GetMemoryCurrentSize(Var iPhysicsMemoryCurrentSize,
iVirtualMemoryCurrentSize,
iPageFileMemoryCurrentSize : DWORD);

//返回内存当前使用率 总的是100%，传回的是0-100%间的使用率，可以自己做转换。
function GetMemoryUsage : Double;

{CPU区}
//刷新CPU数据
procedure CollectCPUData;

//获取CPU在系统中的总数
function GetCPUCount: Integer;

//获取CPU使用率
function GetCPUUsage(Index: Integer): Double;

procedure ReleaseCPUData;

//获取CPU制造厂商
function GetCPUVendor : TVendor; assembler; register;

implementation

{$ifndef ver110}

{$ifndef ver90}
{$ifndef ver100}
{$define UseInt64}
{$endif}
{$endif}


{$ifdef UseInt64}
type TInt64 = Int64;
{$else}
type TInt64 = Comp;
{$endif}

{$else}

type TInt64 = TLargeInteger;

{$endif}

type
PInt64 = ^TInt64;

type
TPERF_DATA_BLOCK = record
Signature : array[0..4 - 1] of WCHAR;
LittleEndian : DWORD;
Version : DWORD;
Revision : DWORD;
TotalByteLength : DWORD;
HeaderLength : DWORD;
NumObjectTypes : DWORD;
DefaultObject : Longint;
SystemTime : TSystemTime;
Reserved: DWORD;
PerfTime : TInt64;
PerfFreq : TInt64;
PerfTime100nSec : TInt64;
SystemNameLength : DWORD;
SystemNameOffset : DWORD;
end;

PPERF_DATA_BLOCK = ^TPERF_DATA_BLOCK;

TPERF_OBJECT_TYPE = record
TotalByteLength : DWORD;
DefinitionLength : DWORD;
HeaderLength : DWORD;
ObjectNameTitleIndex : DWORD;
ObjectNameTitle : LPWSTR;
ObjectHelpTitleIndex : DWORD;
ObjectHelpTitle : LPWSTR;
DetailLevel : DWORD;
NumCounters : DWORD;
DefaultCounter : Longint;
NumInstances : Longint;
CodePage : DWORD;
PerfTime : TInt64;
PerfFreq : TInt64;
end;

PPERF_OBJECT_TYPE = ^TPERF_OBJECT_TYPE;

type
TPERF_COUNTER_DEFINITION = record
ByteLength : DWORD;
CounterNameTitleIndex : DWORD;
CounterNameTitle : LPWSTR;
CounterHelpTitleIndex : DWORD;
CounterHelpTitle : LPWSTR;
DefaultScale : Longint;
DetailLevel : DWORD;
CounterType : DWORD;
CounterSize : DWORD;
CounterOffset : DWORD;
end;

PPERF_COUNTER_DEFINITION = ^TPERF_COUNTER_DEFINITION;

TPERF_COUNTER_BLOCK = record
ByteLength : DWORD;
end;

PPERF_COUNTER_BLOCK = ^TPERF_COUNTER_BLOCK;

TPERF_INSTANCE_DEFINITION = record
ByteLength : DWORD;
ParentObjectTitleIndex : DWORD;
ParentObjectInstance : DWORD;
UniqueID : Longint;
NameOffset : DWORD;
NameLength : DWORD;
end;

PPERF_INSTANCE_DEFINITION = ^TPERF_INSTANCE_DEFINITION;

{$ifdef ver130}
{$L-} // The L+ causes internal error in Delphi 5 compiler
{$O-} // The O+ causes internal error in Delphi 5 compiler
{$Y-} // The Y+ causes internal error in Delphi 5 compiler
{$endif}

{$ifndef ver110}
type
TInt64F = TInt64;
{$else}
type
TInt64F = Extended;
{$endif}

{$ifdef ver110}
function FInt64(Value: TInt64): TInt64F;
function Int64D(Value: DWORD): TInt64;
{$else}
type
FInt64 = TInt64F;
Int64D = TInt64;
{$endif}

{$ifdef ver110}
function FInt64(Value: TInt64): TInt64F;
Var
V: TInt64;
begin
if (Value.HighPart and $80000000) = 0 then // positive value
begin
result:=Value.HighPart;
result:=result*$10000*$10000;
result:=result+Value.LowPart;
end
else
begin
V.HighPart:=Value.HighPart xor $FFFFFFFF;
V.LowPart:=Value.LowPart xor $FFFFFFFF;
result:= -1 - FInt64(V);
end;
end;

function Int64D(Value: DWORD): TInt64;
begin
Result.LowPart:=Value;
Result.HighPart := 0; // positive only
end;
{$endif}

Const
Processor_IDX_Str = '238';
Processor_IDX = 238;
CPUUsageIDX = 6;

type
AInt64F = array[0..$FFFF] of TInt64F;
PAInt64F = ^AInt64F;

Var
_PerfData : PPERF_DATA_BLOCK;
_BufferSize: Integer;
_POT : PPERF_OBJECT_TYPE;
_PCD: PPerf_Counter_Definition;
_ProcessorsCount: Integer;
_Counters: PAInt64F;
_PrevCounters: PAInt64F;
_SysTime: TInt64F;
_PrevSysTime: TInt64F;
_IsWinNT: Boolean;

_W9xCollecting: Boolean;
_W9xCpuUsage: DWORD;
_W9xCpuKey: HKEY;

procedure GetMemoryTotalSize(Var iPhysicsMemoryTotalSize,
iVirtualMemoryTotalSize,
iPageFileMemoryTotalSize : DWORD);
{
iPhysicsMemoryTotalSize 物理内存总容量
iVirtualMemoryTotalSize 虚拟内存总容量
iPageFileMemoryTotalSize 交换内存（页面）总容量
}
Var
msMemory : TMemoryStatus;
begin
msMemory.dwLength := SizeOf(msMemory);
GlobalMemoryStatus(msMemory);
iPhysicsMemoryTotalSize := msMemory.dwTotalPhys;
iVirtualMemoryTotalSize := msMemory.dwTotalVirtual;
iPageFileMemoryTotalSize := msMemory.dwTotalPageFile;
end;

procedure GetMemoryCurrentSize(Var iPhysicsMemoryCurrentSize,
iVirtualMemoryCurrentSize,
iPageFileMemoryCurrentSize : DWORD);
{
iPhysicsMemoryCurrentSize 物理内存可用容量
iVirtualMemoryCurrentSize 虚拟内存可用容量
iPageFileMemoryCurrentSize 交换内存（页面）可用容量
}
Var
msMemory : TMemoryStatus;
begin
msMemory.dwLength := SizeOf(msMemory);
GlobalMemoryStatus(msMemory);
iPhysicsMemoryCurrentSize := msMemory.dwAvailPhys;
iVirtualMemoryCurrentSize := msMemory.dwAvailVirtual;
iPageFileMemoryCurrentSize := msMemory.dwAvailPageFile;
end;

function GetMemoryUsage : Double;
{
返回内存当前使用率 总的是100%，传回的是0-100%间的使用率，可以自己做转换。
}
Var
msMemory : TMemoryStatus;
begin
try
msMemory.dwLength := SizeOf(msMemory);
GlobalMemoryStatus(msMemory);
Result := msMemory.dwMemoryLoad;
except
Result := 0;
end;
end;

function GetCPUCount: Integer;
{
获取CPU数量
}
begin
if _IsWinNT then
begin
if _ProcessorsCount < 0 then
CollectCPUData;
Result:=_ProcessorsCount;
end
else
begin
Result:=1;
end;
end;

procedure ReleaseCPUData;
Var
H: HKEY;
R: DWORD;
DwDataSize, DwType: DWORD;
begin
if _IsWinNT then Exit;
if Not _W9xCollecting then Exit;
_W9xCollecting := False;
RegCloseKey(_W9xCpuKey);
R := RegOpenKeyEx( HKEY_DYN_DATA, 'PerfStats\StopStat', 0, KEY_ALL_ACCESS, H);
if R <> ERROR_SUCCESS then Exit;
dwDataSize := Sizeof(DWORD);
RegQueryValueEx(H,'KERNEL\CPUUsage', Nil, @DwType, PBYTE(@_W9xCpuUsage), @DwDataSize);
RegCloseKey(H);
end;

function GetCPUUsage(Index: Integer): Double;
{
获取CPU当前使用率
}
begin
if _IsWinNT then
begin
if _ProcessorsCount < 0 then CollectCPUData;
if (Index >= _ProcessorsCount) Or (Index < 0) then
Raise Exception.Create('CPU index out of bounds');
if _PrevSysTime = _SysTime then
Result := 0
else
Result := 1-(_Counters[index] - _PrevCounters[index])/(_SysTime-_PrevSysTime);
end
else
begin
if Index <> 0 then
Raise Exception.Create('CPU index out of bounds');
if Not _W9xCollecting then
CollectCPUData;
Result := _W9xCpuUsage/100;
end;
end;

Var
VI: TOSVERSIONINFO;

procedure CollectCPUData;
Var
BS, i : Integer;
_PCB_Instance : PPERF_COUNTER_BLOCK;
_PID_Instance : PPERF_INSTANCE_DEFINITION;
ST : TFileTime;
H : HKEY;
R : DWORD;
DwDataSize, dwType: DWORD;
begin
if _IsWinNT then
begin
BS:=_BufferSize;
while RegQueryValueEx( HKEY_PERFORMANCE_DATA, Processor_IDX_Str, nil, nil,
PByte(_PerfData), @BS ) = ERROR_MORE_DATA do
begin
INC(_BufferSize,$1000);
BS:=_BufferSize;
ReallocMem( _PerfData, _BufferSize );
end;

_POT := PPERF_OBJECT_TYPE(DWORD(_PerfData) + _PerfData.HeaderLength);
for i := 1 to _PerfData.NumObjectTypes do
begin
if _POT.ObjectNameTitleIndex = Processor_IDX then Break;
_POT := PPERF_OBJECT_TYPE(DWORD(_POT) + _POT.TotalByteLength);
end;

if _POT.ObjectNameTitleIndex <> Processor_IDX then
Raise Exception.Create('Unable to locate the "Processor" performance object');

if _ProcessorsCount < 0 then
begin
_ProcessorsCount:=_POT.NumInstances;
GetMem(_Counters,_ProcessorsCount*SizeOf(TInt64));
GetMem(_PrevCounters,_ProcessorsCount*SizeOf(TInt64));
end;

_PCD := PPERF_Counter_DEFINITION(DWORD(_POT) + _POT.HeaderLength);
for i := 1 to _POT.NumCounters do
begin
if _PCD.CounterNameTitleIndex = CPUUsageIDX then Break;
_PCD := PPERF_COUNTER_DEFINITION(DWORD(_PCD) + _PCD.ByteLength);
end;

if _PCD.CounterNameTitleIndex <> CPUUsageIDX then
Raise Exception.Create('Unable to locate the "% of CPU usage" performance counter');

_PID_Instance := PPERF_INSTANCE_DEFINITION(DWORD(_POT) + _POT.DefinitionLength);
for i := 0 to _ProcessorsCount-1 do
begin
_PCB_Instance := PPERF_COUNTER_BLOCK(DWORD(_PID_Instance) + _PID_Instance.ByteLength);
_PrevCounters[i]:=_Counters[i];
_Counters[i]:=FInt64(PInt64(DWORD(_PCB_Instance) + _PCD.CounterOffset)^);
_PID_Instance := PPERF_INSTANCE_DEFINITION(DWORD(_PCB_Instance) + _PCB_Instance.ByteLength);
end;

_PrevSysTime:=_SysTime;
SystemTimeToFileTime(_PerfData.SystemTime, ST);
_SysTime:=FInt64(TInt64(ST));
end
else
begin
if Not _W9xCollecting then
begin
R:=RegOpenKeyEx( HKEY_DYN_DATA, 'PerfStats\StartStat', 0, KEY_ALL_ACCESS, H );
if R <> ERROR_SUCCESS then
Raise Exception.Create('Unable to start performance monitoring');
dwDataSize:=sizeof(DWORD);
RegQueryValueEx( H, 'KERNEL\CPUUsage', nil, @dwType, PBYTE(@_W9xCpuUsage), @dwDataSize );
RegCloseKey(H);
R:=RegOpenKeyEx( HKEY_DYN_DATA, 'PerfStats\StatData', 0,KEY_READ, _W9xCpuKey );
if R <> ERROR_SUCCESS then
Raise Exception.Create('Unable to read performance data');
_W9xCollecting:=True;
end;

dwDataSize:=sizeof(DWORD);
RegQueryValueEx( _W9xCpuKey, 'KERNEL\CPUUsage', nil,@dwType, PBYTE(@_W9xCpuUsage), @dwDataSize );
end;
end;

function GetCPUVendor : TVendor; assembler; register;
asm
PUSH EBX {Save affected register}
PUSH EDI
MOV EDI,EAX {@Result (TVendor)}
MOV EAX,0
DW $A20F {CPUID Command}
MOV EAX,EBX
XCHG EBX,ECX {save ECX result}
MOV ECX,4
@1:
STOSB
SHR EAX,8
LOOP @1
MOV EAX,EDX
MOV ECX,4
@2:
STOSB
SHR EAX,8
LOOP @2
MOV EAX,EBX
MOV ECX,4
@3:
STOSB
SHR EAX,8
LOOP @3
POP EDI {Restore registers}
POP EBX
end;

initialization
_ProcessorsCount:= -1;
_BufferSize:= $2000;
_PerfData := AllocMem(_BufferSize);
VI.dwOSVersionInfoSize := SizeOf(VI);
if Not GetVersionEx(VI) then
Raise Exception.Create('Can''t get the Windows version');
_IsWinNT := VI.dwPlatformId = VER_PLATFORM_WIN32_NT;

finalization
ReleaseCPUData;
FreeMem(_PerfData);

end.