请问，怎么能得到一个进程占用的内存大小，谢谢。

[renyi0746]

请问，怎么能得到一个进程占用的内存大小，谢谢。

[pomelowu]

GetProcessMemoryInfo

[pomelowu]

The following sample code uses the GetProcessMemoryInfo function to obtain information about the memory usage of a process.



#include <windows.h>
#include <stdio.h>
#include "psapi.h"

void PrintMemoryInfo( DWORD processID )
{
HANDLE hProcess;
PROCESS_MEMORY_COUNTERS pmc;

// Print the process identifier.

printf( "\nProcess ID: %u\n", processID );

// Print information about the memory usage of the process.

hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
PROCESS_VM_READ,
FALSE, processID );
if (NULL == hProcess)
return;

if ( GetProcessMemoryInfo( hProcess, &pmc, sizeof(pmc)) )
{
printf( "\tPageFaultCount: 0x%08X\n", pmc.PageFaultCount );
printf( "\tPeakWorkingSetSize: 0x%08X\n",
pmc.PeakWorkingSetSize );
printf( "\tWorkingSetSize: 0x%08X\n", pmc.WorkingSetSize );
printf( "\tQuotaPeakPagedPoolUsage: 0x%08X\n",
pmc.QuotaPeakPagedPoolUsage );
printf( "\tQuotaPagedPoolUsage: 0x%08X\n",
pmc.QuotaPagedPoolUsage );
printf( "\tQuotaPeakNonPagedPoolUsage: 0x%08X\n",
pmc.QuotaPeakNonPagedPoolUsage );
printf( "\tQuotaNonPagedPoolUsage: 0x%08X\n",
pmc.QuotaNonPagedPoolUsage );
printf( "\tPagefileUsage: 0x%08X\n", pmc.PagefileUsage );
printf( "\tPeakPagefileUsage: 0x%08X\n",
pmc.PeakPagefileUsage );
}

CloseHandle( hProcess );
}

void main( )
{
// Get the list of process identifiers.

DWORD aProcesses[1024], cbNeeded, cProcesses;
unsigned int i;

if ( !EnumProcesses( aProcesses, sizeof(aProcesses), &cbNeeded ) )
return;

// Calculate how many process identifiers were returned.

cProcesses = cbNeeded / sizeof(DWORD);

// Print the memory usage for each process

for ( i = 0; i < cProcesses; i++ )
PrintMemoryInfo( aProcesses[i] );
}

The main function obtains a list of processes by using the EnumProcesses function. For each process, main calls the PrintMemoryInfo function, passing the process identifier. PrintMemoryInfo in turn calls the OpenProcess function to obtain the process handle. If OpenProcess fails, the output shows only the process identifier. For example, OpenProcess fails for the Idle and CSRSS processes because their access restrictions prevent user-level code from opening them. Finally, PrintMemoryInfo calls the GetProcessMemoryInfo function to obtain the memory usage information.

[renyi0746]

请问，这么多内存PRINT，哪个是正在使用的内存数呢？

[pomelowu]

都是正在使用的啊……例子里边是枚举了当前所有的进程，然后print相应的内存使用情况。
如果你只需要程序自身的内存使用量，完全没必要照搬例子里所有的代码，只需要GetProcessMemoryInfo第一个参数设为当前进程的句柄即可。

[test2002]

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