系统如何管理虚拟内存？

[solarsoft]

Windows函数GlobalMemoryStatus可用于当前内存状态的动态信息。
哪我应该如何来管理呢？也可到我的站点http://solarsoft.go.163.com

[philiploo]

不清楚你的管理是什么意思，一般来说有三种方法：
1.保留地址空间：
LPVOID VirtualAlloc(LPVOID lpAddress,DWORD cbSize,DWORD fdwAllocationType,DWORD fdwProtect);
lpAddress为保留内存地址，可以为NULL（系统自动分配）
cbSize保留大小
fdwAllocationType 指出保留(MEM_RESERVE)还是提交(MEM_COMMIT)内存
fdwProtect 保留属性:PAGE_NOACCESS,PAGE_READWRITE,PAGE_READONLY,PAGE_EXECUTE,PAGE_EXECUTE_READ,PAGE_EXECUTE_READWRITE
释放用BOOL VirtualFree(LPVOID lpAddress,DWORD cbSize,DWORD fdwFreeType)
全部释放cbSize=0,fdwFreeType为MEM_RELEASE; 部分释放以整页为单位，lpAddress所在页为开始，cbSize为大小，fdwFreeType为MEM_DECOMMIT
2.内存映象文件
通过下列函数实现
HANDLE CreateFile(
LPCTSTR lpFileName, // pointer to name of the file
DWORD dwDesiredAccess, // access (read-write) mode
DWORD dwShareMode, // share mode
LPSECURITY_ATTRIBUTES lpSecurityAttributes,
// pointer to security attributes
DWORD dwCreationDisposition, // how to create
DWORD dwFlagsAndAttributes, // file attributes
HANDLE hTemplateFile // handle to file with attributes to
// copy
);


HANDLE CreateFileMapping(
HANDLE hFile, // handle to file to map
LPSECURITY_ATTRIBUTES lpFileMappingAttributes,
// optional security attributes
DWORD flProtect, // protection for mapping object
DWORD dwMaximumSizeHigh, // high-order 32 bits of object size
DWORD dwMaximumSizeLow, // low-order 32 bits of object size
LPCTSTR lpName // name of file-mapping object
);

LPVOID MapViewOfFile(
HANDLE hFileMappingObject, // file-mapping object to map into
// address space
DWORD dwDesiredAccess, // access mode
DWORD dwFileOffsetHigh, // high-order 32 bits of file offset
DWORD dwFileOffsetLow, // low-order 32 bits of file offset
DWORD dwNumberOfBytesToMap // number of bytes to map
);

BOOL UnmapViewOfFile(
LPCVOID lpBaseAddress // address where mapped view begins
);

BOOL FlushViewOfFile(
LPCVOID lpBaseAddress, // start address of byte range to flush
DWORD dwNumberOfBytesToFlush // number of bytes in range
);


详细说明可参看msdn

3.Win32堆