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
.