diff options
| author |   pefo <pefo@openbsd.org> | 1997-08-23 10:43:24 +0000 |
|---|---|---|
| committer | pefo <pefo@openbsd.org> | 1997-08-23 10:43:24 +0000 |
| commit | b58fb9c13afef103fea95b8844e70aa8cebcdbaa (patch) | |
| tree | d5f522b3ad1bfda6d0abae05214dad687b60658e /lib/libc/stdlib/malloc.3 | |
| parent | sync usage() to man (diff) | |
| download | wireguard-openbsd-b58fb9c13afef103fea95b8844e70aa8cebcdbaa.tar.xz wireguard-openbsd-b58fb9c13afef103fea95b8844e70aa8cebcdbaa.zip | |
Change realloc(foo,0) to behave like malloc(0). Both now return a pointer
to an object of size zero. This will allow testing on reallocs return value
to determine if the operation was successful or not.
Diffstat (limited to 'lib/libc/stdlib/malloc.3')
| -rw-r--r-- | lib/libc/stdlib/malloc.3 | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/lib/libc/stdlib/malloc.3 b/lib/libc/stdlib/malloc.3 index eb09eeedbca..6fd362b93b2 100644 --- a/lib/libc/stdlib/malloc.3 +++ b/lib/libc/stdlib/malloc.3 @@ -33,7 +33,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.\" $OpenBSD: malloc.3,v 1.6 1997/05/31 08:55:05 tholo Exp $ +.\" $OpenBSD: malloc.3,v 1.7 1997/08/23 10:43:24 pefo Exp $ .\" .Dd August 27, 1996 .Dt MALLOC 3 @@ -77,6 +77,8 @@ coercion) for storage of any type of object. If the space is of .Em pagesize or larger, the memory returned will be page-aligned. .Pp +Allocation of a zero size object returns a pointer to a zero size object. +.Pp The .Fn free function causes the space pointed to by @@ -120,7 +122,8 @@ If .Fa size is zero and .Fa ptr -is not a null pointer, the object it points to is freed. +is not a null pointer, the object it points to is freed and a new zero size +object is returned. .Pp Malloc will first look for a symbolic link called .Pa /etc/malloc.conf @@ -211,8 +214,8 @@ function returns no value. .Pp The .Fn realloc -function returns either a null pointer or a pointer -to the possibly moved allocated space. +function a pointer to the possibly moved allocated space; +otherwise a null pointer is returned. .Sh MESSAGES If .Fn malloc , |