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Try a different approach to making publish function seem used.

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We want the DISPATCH_ADD_PUB() macro to count as making a
DECLARE_PUBLISH() invocation "used", so let's try a new approach
that preserves that idea.  The old one apparently did not work for
some versions of osx clang.
This commit is contained in:
Nick Mathewson 2019-03-12 19:25:31 -04:00
parent 94feec59cf
commit beedadbeac
1 changed files with 9 additions and 1 deletions
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10
src/lib/pubsub/pubsub_macros.h
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@ -268,12 +268,20 @@
} \
EAT_SEMICOLON
/**
* Add a fake use of the publish function for 'messagename', so that
* the compiler does not call it unused.
*/
#define DISPATCH__FAKE_USE_OF_PUBFN_(messagename) \
( 0 ? (publish_fn__ ##messagename((msg_arg_type__##messagename)0), 1) \
: 1)
/*
* This macro is for internal use. It backs DISPATCH_ADD_PUB*()
*/
#define DISPATCH_ADD_PUB_(connector, channel, messagename, flags) \
( \
((void)publish_fn__ ##messagename), \
DISPATCH__FAKE_USE_OF_PUBFN_(messagename), \
pubsub_add_pub_((connector), \
&pub_binding__ ##messagename, \
get_channel_id(# channel), \