rototiller: pass num_cpus to .create_context()

Back in the day, there was no {create,destroy}_context(), so passing
num_cpus to just prepare_frame made sense.  Modules then would
implicitly initialize themselves on the first prepare_frame() call
using a static initialized variable.

Since then things have been decomposed a bit for more sophisticated
(and cleaner) modules.  It can be necessary to allocate per-cpu data
structures and the natural place to do that is @ create_context().  So
this commit wires that up.

A later commit will probably have to plumb a "current cpu" identifier
into the render_fragment() function.  Because a per-cpu data structure
isn't particularly useful if you can't easily address it from within
your execution context.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/rototiller.h b/src/rototiller.h
index ca2559a..e60eece 100644
--- a/src/rototiller.h
+++ b/src/rototiller.h
@@ -11,7 +11,7 @@ typedef struct settings_t settings;
 typedef struct setting_desc_t setting_desc_t;
 
 typedef struct rototiller_module_t {
-	void *	(*create_context)(void);
+	void *	(*create_context)(unsigned n_cpus);
 	void	(*destroy_context)(void *context);
 	void	(*prepare_frame)(void *context, unsigned n_cpus, fb_fragment_t *fragment, rototiller_fragmenter_t *res_fragmenter);
 	void	(*render_fragment)(void *context, fb_fragment_t *fragment);