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Clarify description of realloc() behavior for ((size == 0) && (ptr != NULL)).

This commit is contained in:
Michael Kerrisk 2008-02-22 10:06:08 +00:00
parent bc5ec13168
commit c4acc6895a
1 changed files with 5 additions and 3 deletions
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8
man3/malloc.3
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@ -25,7 +25,7 @@
.\" Documented MALLOC_CHECK_, Wolfram Gloger (wmglo@dent.med.uni-muenchen.de) .\" Documented MALLOC_CHECK_, Wolfram Gloger (wmglo@dent.med.uni-muenchen.de)
.\" 2007-09-15 mtk: added notes on malloc()'s use of sbrk() and mmap(). .\" 2007-09-15 mtk: added notes on malloc()'s use of sbrk() and mmap().
.\" .\"
.TH MALLOC 3 2007-09-15 "GNU" "Linux Programmer's Manual" .TH MALLOC 3 2008-02-22 "GNU" "Linux Programmer's Manual"
.SH NAME .SH NAME
calloc, malloc, free, realloc \- Allocate and free dynamic memory calloc, malloc, free, realloc \- Allocate and free dynamic memory
.SH SYNOPSIS .SH SYNOPSIS
@ -98,12 +98,14 @@ The contents will be unchanged to the minimum of the old and new sizes;
newly allocated memory will be uninitialized. newly allocated memory will be uninitialized.
If If
.I ptr .I ptr
is NULL, the call is equivalent to is NULL, then the call is equivalent to
.IR malloc(size) ; .IR malloc(size) ;
if if
.I size .I size
is equal to zero, is equal to zero,
the call is equivalent to and
.I ptr
is not NULL, then the call is equivalent to
.IR free(ptr) . .IR free(ptr) .
Unless Unless
.I ptr .I ptr