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MALLOC(3) UNIX Programmer's Manual MALLOC(3)
NNAAMMEE
mmaalllloocc, - general memory allocation function
SSYYNNOOPPSSIISS
##iinncclluuddee <<ssttddlliibb..hh>>
_v_o_i_d _*
mmaalllloocc(_s_i_z_e___t _s_i_z_e)
DDEESSCCRRIIPPTTIIOONN
The mmaalllloocc() function allocates uninitialized space for an object whose
size is specified by _s_i_z_e. The mmaalllloocc() function maintains multiple lists
of free blocks according to size, allocating space from the appropriate
list.
The allocated space is suitably aligned (after possible pointer coercion)
for storage of any type of object. If the space is of _p_a_g_e_s_i_z_e or larger,
the memory returned will be pagealigned.
RREETTUURRNN VVAALLUUEESS
The mmaalllloocc() function returns a pointer to the allocated space if suc
cessful; otherwise a null pointer is returned.
SSEEEE AALLSSOO
brk(2), pagesize(2), free(3), calloc(3), alloca(3), realloc(3),
memory(3)
SSTTAANNDDAARRDDSS
The mmaalllloocc() function conforms to ANSI C3.1591989 (``ANSI C'').
BBUUGGSS
The current implementation of malloc does not always fail gracefully when
system memory limits are approached. It may fail to allocate memory when
larger free blocks could be broken up, or when limits are exceeded be
cause the size is rounded up. It is optimized for sizes that are powers
of two.
4th Berkeley Distribution June 29, 1991 1