PR_MemMap

Maps a section of a file to memory.

Syntax

#include <prio.h>

void* PR_MemMap(
  PRFileMap *fmap,
  PRInt64 offset,
  PRUint32 len);

Parameters

The function has the following parameters:

fmap: A pointer to the file-mapping object representing the file to be memory-mapped.
offset: The starting offset of the section of file to be mapped. The offset must be aligned to whole pages.
len: Length of the section of the file to be mapped.

Returns

The starting address of the memory region to which the section of file is mapped. Returns NULL on error.

Description

PR_MemMap maps a section of the file represented by the file mapping fmap to memory. The section of the file starts at offset and has the length len.

When the file-mapping memory region is no longer needed, it should be unmapped with a call to PR_MemUnmap.