MEMORY(3)						   BSD Library Functions Manual 						 MEMORY(3)

NAME

     alloca, calloc, free, malloc, mmap, realloc -- general memory allocation operations

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <stdlib.h>

     void *
     alloca(size_t size);

     void *
     calloc(size_t nelem, size_t elsize);

     void
     free(void *ptr);

     void *
     malloc(size_t size);

     void *
     realloc(void *ptr, size_t size);

     #include <sys/mman.h>

     void *
     mmap(void * addr, size_t len, int prot, int flags, int fildes, off_t off);

DESCRIPTION

     These functions allocate and free memory for the calling process.	They are described in the individual manual pages.

LEGACY SYNOPSIS

     #include <sys/types.h>
     #include <sys/mman.h>

     void *
     mmap(void * addr, size_t len, int prot, int flags, int fildes, off_t off);

     The include file <sys/types.h> is needed for this function.

COMPATIBILITY

     mmap() now returns with errno set to EINVAL in places that historically succeeded.  The rules have changed as follows:

     o	 The flags parameter must specify either MAP_PRIVATE or MAP_SHARED.

     o	 The size parameter must not be 0.

     o	 The off parameter must be a multiple of pagesize, as returned by sysconf().

SEE ALSO

     mmap(2), alloca(3), calloc(3), free(3), malloc(3), realloc(3), compat(5)

STANDARDS

     These functions, with the exception of alloca() and mmap() conform to ISO/IEC 9899:1990 (``ISO C90'').

BSD
								   June 4, 1993 							       BSD