X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib/blobdiff_plain/83af686b3f8fa028e75e3bd6c3babef4c143ddbe..cededfbe1efb12e68c1defe008f1d69d97f4cbe3:/man/dstr.3

diff --git a/man/dstr.3 b/man/dstr.3
index 998e3f3..959a7aa 100644
--- a/man/dstr.3
+++ b/man/dstr.3
@@ -103,6 +103,7 @@ typedef struct dstr {
   char *buf;		/* Pointer to string buffer */
   size_t sz;		/* Size of the buffer */
   size_t len;		/* Length of the string */
+  arena *a;		/* Pointer to arena */
 } dstr;
 .VE
 The
@@ -159,6 +160,14 @@ element is zero) and the nonexistent string (a null pointer).  Any
 whose
 .B len
 is zero is an empty string.
+.PP
+The
+.I a
+member refers to the arena from which the string's buffer has been
+allocated.  Immediately after creation, this is set to be
+.BR arena_stdlib (3);
+you can set it to point to any other arena of your choice before the
+buffer is allocated.
 .SS "Creation and destruction"
 The caller is responsible for allocating the
 .B dstr