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GlobalMemoryStatusEx 函式 (sysinfoapi.h)

擷取系統目前使用實體和虛擬記憶體的相關信息。

語法

BOOL GlobalMemoryStatusEx(
  [in, out] LPMEMORYSTATUSEX lpBuffer
);

參數

[in, out] lpBuffer

MEMORYSTATUSEX 結構的指標,可接收目前記憶體可用性的相關信息。

傳回值

如果函式成功,則傳回非零的值。

如果此函式失敗,則傳回值為零。 若要取得擴充的錯誤資訊,請呼叫 GetLastError

備註

您可以使用 GlobalMemoryStatusEx 函 式來判斷應用程式可以配置的記憶體數量,而不會影響其他應用程式。

GlobalMemoryStatusEx 函式傳回的資訊是 volatile。 不保證此函式的兩個循序呼叫會傳回相同的資訊。

lpBuffer之 MEMORYSTATUSEX 結構的 ullAvailPhys 成員包含所有 NUMA 節點的記憶體。

範例

下列程式代碼顯示 GlobalMemoryStatusEx 函式的簡單用法。

//  Sample output:
//  There is       51 percent of memory in use.
//  There are 2029968 total KB of physical memory.
//  There are  987388 free  KB of physical memory.
//  There are 3884620 total KB of paging file.
//  There are 2799776 free  KB of paging file.
//  There are 2097024 total KB of virtual memory.
//  There are 2084876 free  KB of virtual memory.
//  There are       0 free  KB of extended memory.

#include <windows.h>
#include <stdio.h>
#include <tchar.h>

// Use to convert bytes to KB
#define DIV 1024

// Specify the width of the field in which to print the numbers. 
// The asterisk in the format specifier "%*I64d" takes an integer 
// argument and uses it to pad and right justify the number.
#define WIDTH 7

void _tmain()
{
  MEMORYSTATUSEX statex;

  statex.dwLength = sizeof (statex);

  GlobalMemoryStatusEx (&statex);

  _tprintf (TEXT("There is  %*ld percent of memory in use.\n"),
            WIDTH, statex.dwMemoryLoad);
  _tprintf (TEXT("There are %*I64d total KB of physical memory.\n"),
            WIDTH, statex.ullTotalPhys/DIV);
  _tprintf (TEXT("There are %*I64d free  KB of physical memory.\n"),
            WIDTH, statex.ullAvailPhys/DIV);
  _tprintf (TEXT("There are %*I64d total KB of paging file.\n"),
            WIDTH, statex.ullTotalPageFile/DIV);
  _tprintf (TEXT("There are %*I64d free  KB of paging file.\n"),
            WIDTH, statex.ullAvailPageFile/DIV);
  _tprintf (TEXT("There are %*I64d total KB of virtual memory.\n"),
            WIDTH, statex.ullTotalVirtual/DIV);
  _tprintf (TEXT("There are %*I64d free  KB of virtual memory.\n"),
            WIDTH, statex.ullAvailVirtual/DIV);

  // Show the amount of extended memory available.

  _tprintf (TEXT("There are %*I64d free  KB of extended memory.\n"),
            WIDTH, statex.ullAvailExtendedVirtual/DIV);
}

規格需求

需求
最低支援的用戶端 Windows XP [傳統型應用程式 |UWP 應用程式]
最低支援的伺服器 Windows Server 2003 [傳統型應用程式 |UWP 應用程式]
目標平台 Windows
標頭 sysinfoapi.h (包含 Windows.h)
程式庫 Kernel32.lib
DLL Kernel32.dll

另請參閱

MEMORYSTATUSEX

記憶體管理功能

記憶體效能資訊

虛擬位址空間和實體記憶體