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optional_api: Remove unused nonoptreq fields

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As they're not actively used, they only grow stale. The moduleinfo field itself
is kept in Asterisk 13/15 for ABI compatibility.

ASTERISK-28046 #close

Change-Id: I8df66a7007f807840414bb348511a8c14c05a9fc
This commit is contained in:
Walter Doekes
2018-09-11 14:22:18 +02:00
parent c1a2c84361
commit 78453e65fd
4 changed files with 15 additions and 30 deletions
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19
res/res_stasis_test.c
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@@ -100,23 +100,10 @@ struct stasis_message_sink *stasis_message_sink_create(void)
* \brief Implementation of the stasis_message_sink_cb() callback.
*
* Why the roundabout way of exposing this via stasis_message_sink_cb()? Well,
* it has to do with how we load modules.
* it has to do with how we previously loaded modules, using \c RTLD_LAZY.
*
* Modules have their own metadata compiled into them in the module info block
* at the end of the file. This includes dependency information in the
* \c nonoptreq field.
*
* Asterisk loads the module, inspects the field, then loads any needed
* dependencies. This works because Asterisk passes \c RTLD_LAZY to the initial
* dlopen(), which defers binding function references until they are called.
*
* But when you take the address of a function, that function needs to be
* available at load time. So if some module used the address of
* message_sink_cb() directly, and \c res_stasis_test.so wasn't loaded yet, then
* that module would fail to load.
*
* The stasis_message_sink_cb() function gives us a layer of indirection so that
* the initial lazy binding will still work as expected.
* The stasis_message_sink_cb() function gave us a layer of indirection so that
* the initial lazy binding would still work as expected.
*/
static void message_sink_cb(void *data, struct stasis_subscription *sub,
struct stasis_message *message)