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mmap_shared(3)		   Library Functions Manual		mmap_shared(3)

NAME
       mmap_shared - memory map	a file for reading and writing

SYNTAX
       #include	<mmap.h>

       char* mmap_shared(const char* filename,size_t* filesize);

DESCRIPTION
       mmap_shared opens filename for reading and writing, maps	the whole file
       into memory, closes the file, writes the	length of the file to filesize
       and returns a pointer to	the mapped file.

       The file	is mapped shared.  Changes done	to the mapped region are writ-
       ten to disk and are visible to other processes reading from the file or
       mapping the same	file into memory.

       The file	is unmapped by the operating system if the process terminates.
       It can also be manually unmapped	by calling munmap from <sys/mman.h>.

       To  write  changes  to  disk  immediately,  you	can  use  msync	  from
       <sys/mman.h>.

       If the file could not be	opened or mapped, (void*)0 is returned.

SEE ALSO
       mmap_unmap(3), msync(2)

								mmap_shared(3)

NAME | SYNTAX | DESCRIPTION | SEE ALSO

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