Originální popis anglicky:
malloc - a memory allocator
Návod, kniha: POSIX Programmer's Manual
#include <stdlib.h>
void *malloc(size_t
size);
The
malloc() function shall allocate unused space for an object whose
size in bytes is specified by
size and whose value is unspecified.
The order and contiguity of storage allocated by successive calls to
malloc() is unspecified. The pointer returned if the allocation
succeeds shall be suitably aligned so that it may be assigned to a pointer to
any type of object and then used to access such an object in the space
allocated (until the space is explicitly freed or reallocated). Each such
allocation shall yield a pointer to an object disjoint from any other object.
The pointer returned points to the start (lowest byte address) of the
allocated space. If the space cannot be allocated, a null pointer shall be
returned. If the size of the space requested is 0, the behavior is
implementation-defined: the value returned shall be either a null pointer or a
unique pointer.
Upon successful completion with
size not equal to 0,
malloc()
shall return a pointer to the allocated space. If
size is 0, either a
null pointer or a unique pointer that can be successfully passed to
free() shall be returned. Otherwise, it shall return a null pointer
and set
errno to indicate the error.
The
malloc() function shall fail if:
- ENOMEM
- Insufficient storage space is available.
The following sections are informative.
None.
None.
None.
None.
calloc() ,
free() ,
realloc() , the Base Definitions volume
of IEEE Std 1003.1-2001,
<stdlib.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
