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docs: tweak keep_data_small.txt

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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Denys Vlasenko 2014-01-13 11:45:34 +01:00
parent 0f592d7fb9
commit d74f8435ea
1 changed files with 9 additions and 1 deletions
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10
docs/keep_data_small.txt
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@ -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.