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Prevent duplicate Ctrl-protocol instances

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ControlProtocols are single instance.

Activating an already active protocol leads to crashes due to
various rasons (e.g. port already registered), re-used singleton
event_loop_name and request-buffers, duplicate free of
AbstractUI request buffers during deactivate,..
This commit is contained in:
Robin Gareus 2019-09-05 18:59:26 +02:00
parent 22e5c1de0d
commit 9bb2f2bb69
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1 changed files with 5 additions and 0 deletions
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5
libs/ardour/control_protocol_manager.cc
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@ -129,6 +129,11 @@ ControlProtocolManager::activate (ControlProtocolInfo& cpi)
cpi.requested = true;
if (cpi.protocol && cpi.protocol->active()) {
warning << string_compose (_("Control protocol %1 was already active."), cpi.name) << endmsg;
return 0;
}
if ((cp = instantiate (cpi)) == 0) {
return -1;
}