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authorDenys Vlasenko <vda.linux@googlemail.com>2014-01-13 10:45:34 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2014-01-13 10:45:34 (GMT)
commitd74f8435ea7479fe558efa63c2ecc9aed5662db2 (patch)
treea29db0523f242d5506c94c1090bf4ee6675947dd
parent0f592d7fb94c5887528d0ee24020c2225ab71c28 (diff)
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busybox-d74f8435ea7479fe558efa63c2ecc9aed5662db2.tar.bz2
docs: tweak keep_data_small.txt
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--docs/keep_data_small.txt10
1 files changed, 9 insertions, 1 deletions
diff --git a/docs/keep_data_small.txt b/docs/keep_data_small.txt
index 9fc7996..3ced1a6 100644
--- a/docs/keep_data_small.txt
+++ b/docs/keep_data_small.txt
@@ -103,7 +103,15 @@ smaller code. In order to assign it, use SET_PTR_TO_GLOBALS macro:
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G)));
-Typically it is done in <applet>_main().
+Typically it is done in <applet>_main(). Another variation is
+to use stack:
+
+int <applet>_main(...)
+{
+#undef G
+ struct globals G;
+ memset(&G, 0, sizeof(G));
+ SET_PTR_TO_GLOBALS(&G);
Now you can reference "globals" by G.a, G.buf and so on, in any function.