关于GetProcessMemoryInfo

Question

这个函数具体怎么用啊？看了半天也不会
已经获得句柄
最好举个例子
谢谢

Answer 1

MSDN 例子:
Collecting Memory Usage Information For a Process
To determine the efficiency of your application, you may want to examine its memory usage. 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 ( 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. 

Answer 2

#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] );
}

Answer 3

我就不说这个了另一个函数获取内存使用信息         MEMORYSTATUS memStatus;
memStatus.dwLength = sizeof(MEMORYSTATUS); GlobalMemoryStatus(&memStatus); DWORD total = (DWORD)memStatus.dwTotalPhys;
DWORD avail = (DWORD)memStatus.dwAvailPhys;
DWORD vir  = (DWORD)memStatus.dwTotalVirtual; //转化为MB
total = (total/1024)/1024;
avail = (avail/1024)/1024;
vir   = (vir/1024)/1024; CString memsta;
memsta.Format("内存使用信息:  总物理内存是:%ld MB, 可用物理内存是:%ld MB, 虚拟内存是:%ld MB",total,avail,vir);

SetDlgItemText(IDC_MEMINFOR,memsta);