This value is not supported. The system must have enough committable pages to hold the entire mapping. If this parameter is NULL , the file mapping object is created without a name. This attribute is not supported for file mapping objects that are backed by executable image files or data files the hFile parameter is a handle to an executable image or data file. Sets all pages to be write-combined. Creating a file mapping object in the global namespace from a session other than session zero requires the SeCreateGlobalPrivilege privilege.
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Allows views to be mapped for read-only, copy-on-write, or execute access.
Processes calling CreateFileMapping for an existing object receive a handle to the existing object. You may receive emails, depending on your notification preferences.
However, if the file mapping object is createfjlemapping than the file, the system expands the file before CreateFileMapping returns. Sign in to answer this question.
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Creating a View Within a File. File Mapping Size The size of the file mapping object is independent of the size of the file being mapped. In addition, the file handle createfilemappinng remain open until the process no longer needs the file mapping object. The size of a file view is limited to the largest available contiguous block of unreserved virtual memory.
Therefore, to fully close a file mapping object, an application must unmap all mapped views of the file mapping object by calling UnmapViewOfFile and close the file mapping object handle by calling CloseHandle.
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Creating a File Mapping Object
Multiple processes can share a view of the same file by either using a single shared file mapping object or creating separate file mapping objects backed by the same file. There is a mapping object that has a name and lives in memory, but no actual disk file. Cerca Answers Clear Filters.
After a file mapping object is created, the size of the file must not exceed the size of the file mapping object; if it does, not all of the file contents are filtee for sharing.
CreateFileMappingA function | Microsoft Docs
This occurs because these objects share the same namespace. A direct link to that example is: Creating a file mapping object in the global namespace from a session other than session zero requires the SeCreateGlobalPrivilege privilege.
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Allows views to be mapped for read-only or copy-on-write access. Use structured exception handling to protect any code that writes to or reads from a file view.