[LV2] [Devel] lv2_descriptor() considered harmful

Gabriel M. Beddingfield gabrbedd at gmail.com
Sat Feb 25 11:09:09 PST 2012

On 02/24/2012 05:58 PM, Martin wrote:
> apart from getting the bundle path it would also be useful to get the
> requested URI directly from the host (if possible).
> typedef int (*LV2_Init_Function)(const char* bundle_path,
> const char* plugin_URI,
> const LV2_Feature *const * features);

This looks totally wrong.  The intent for LV2_Init_Function is to 
provide a /library/ constructor... to be executed after dlopen() opens 
the so-file.  It has nothing to do with any specific plugin URI... and 
if it does, then that's a mistake.  An individual plugin already has an 
explicit init/deinit.

For example... suppose that all your plugins use a Singleton logger or 
some kind.  You want it to be init'd on library load and destructed on 
library close.  ATM, the only way to do this is to make your plugin in 
C++[1] or use compiler extensions.[2]


[1] think: constructor/destructor of a global object
[2] e.g. for GCC using the constructor/destructor attributes.

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