From b732a73bc773789894466b0e5320b2f1fe42c7e9 Mon Sep 17 00:00:00 2001
From: John Denker <jsd@av8n.com>
Date: Fri, 1 Jun 2012 18:58:45 -0700
Subject: original, as downloaded from
 http://www.qmail.org/netqmail-1.06.tar.gz

---
 alloc.3 | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 alloc.3

(limited to 'alloc.3')

diff --git a/alloc.3 b/alloc.3
new file mode 100644
index 0000000..58b4432
--- /dev/null
+++ b/alloc.3
@@ -0,0 +1,62 @@
+.TH alloc 3
+.SH NAME
+alloc \- allocate memory
+.SH SYNTAX
+.B #include <alloc.h>
+
+char *\fBalloc\fP(\fInew\fR);
+
+void \fBalloc_free\fP(\fIx\fR);
+
+void \fBalloc_re\fP(&\fIx\fR,\fIold\fR,\fInew\fR);
+
+char *\fIx\fR;
+.br
+unsigned int \fIold\fR;
+.br
+unsigned int \fInew\fR;
+.SH DESCRIPTION
+.B alloc
+allocates enough space from the heap for
+.I new
+bytes of data,
+adequately aligned for any data type.
+.I new
+may be 0.
+.B alloc
+returns a pointer to the space.
+If space is not available,
+.B alloc
+returns 0,
+setting
+.B errno
+appropriately.
+
+.B alloc_free
+returns space to the heap.
+
+.B alloc_re
+expands the space allocated to
+.I x
+from
+.I old
+bytes to
+.I new
+bytes.
+It allocates new space,
+copies
+.I old
+bytes from the old space to the new space,
+returns the old space to the heap,
+and changes
+.I x
+to point to the new space.
+It then returns 1.
+If space is not available,
+.B alloc_re
+returns 0,
+leaving the old space alone.
+.SH "SEE ALSO"
+sbrk(2),
+malloc(3),
+error(3)
-- 
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