ADC Home > Reference Library > Reference > Mac OS X > Mac OS X Man Pages
|
This document is a Mac OS X manual page. Manual pages are a command-line technology for providing documentation. You can view these manual pages locally using the man(1) command. These manual pages come from many different sources, and thus, have a variety of writing styles. For more information about the manual page format, see the manual page for manpages(5). |
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: oo The flags parameter must specify either MAP_PRIVATE or MAP_SHARED. oo The size parameter must not be 0. oo 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 |