Question

我正在尝试在Windows 7 32位的C ++应用程序中使用GetProcessMemoryInfo的函数psapi.h。

我遵循了一些教程，我做了类似的事情：

PPROCESS_MEMORY_COUNTERS pMemCountr;

pMemCountr = new PROCESS_MEMORY_COUNTERS();
bool result = GetProcessMemoryInfo(GetCurrentProcess(),
                                   pMemCountr,
                                   sizeof(PPROCESS_MEMORY_COUNTERS));

问题是我总是从执行GetProcessMemoryInfo()方法获得“假”。我在这里做错了什么？

Answer 1

问题是

sizeof(PPROCESS_MEMORY_COUNTERS)

产生PPROCESS_MEMORY_COUNTERS的大小，这是PROCESS_MEMORY_COUNTERS*类型指针（在开头注意加倍P）。

你想要的是

sizeof(PROCESS_MEMORY_COUNTERS)

如果没有new，你也会好多了：

PROCESS_MEMORY_COUNTERS memCounter;
BOOL result = GetProcessMemoryInfo(GetCurrentProcess(),
                                   &memCounter,
                                   sizeof( memCounter ));

Answer 2

将sizeof（PPROCESS_MEMORY_COUNTERS）更改为sizeof（PROCESS_MEMORY_COUNTERS）

Answer 3

在MSDN上：

BOOL WINAPI GetProcessMemoryInfo（在 HANDLE过程中， Out PPROCESS_MEMORY_COUNTERS ppsmemCounters， In DWORD cb ）;

示例：

HANDLE hProcess;
PROCESS_MEMORY_COUNTERS pmc;

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( "\tWorkingSetSize: 0x%08X - %u\n",  pmc.WorkingSetSize,  
                                              pmc.WorkingSetSize / 1024);        
    printf( "\tQuotaPeakPagedPoolUsage: 0x%08X - %u\n", 
         pmc.QuotaPeakPagedPoolUsage ,   pmc.QuotaPeakPagedPoolUsage / 1024);
    printf( "\tQuotaPagedPoolUsage: 0x%08X - %u\n", pmc.QuotaPagedPoolUsage, 
                                              pmc.QuotaPagedPoolUsage / 1024);
    printf( "\tQuotaPeakNonPagedPoolUsage: 0x%08X - %u\n", 
               pmc.QuotaPeakNonPagedPoolUsage,pmc.QuotaPeakNonPagedPoolUsage / 1024 );
    printf( "\tQuotaNonPagedPoolUsage:0x%08X-%u\n",pmc.QuotaNonPagedPoolUsage ,   pmc.QuotaNonPagedPoolUsage / 1024);
    printf( "\tPagefileUsage: 0x%08X - %u\n", pmc.PagefileUsage,     pmc.PagefileUsage/1024 ); 
    printf( "\tPeakPagefileUsage: 0x%08X - %u\n", pmc.PeakPagefileUsage, pmc.PeakPagefileUsage/1024 );
    printf( "\tcb: 0x%08X - %u\n", pmc.cb , pmc.cb / 1024);     
}
CloseHandle(hProcess);

或者您可以查看here

中的完整代码

如何在C ++中使用GetProcessMemoryInfo？

3 个答案: