Make all handlers objects refcounted.

I'm realizing that basically all upb objects
will need to be refcounted to be sharable
across languages, but *not* messages which
are on their way out so we can get out of
the business of data representations.

Things which must be refcounted:
- encoders, decoders
- handlers objects
- defs

2 files changed, 8 insertions, 8 deletions

diff --git a/benchmarks/parsestream.upb_table.c b/benchmarks/parsestream.upb_table.c
index 089d956..a4aebd8 100644
--- a/benchmarks/parsestream.upb_table.c
+++ b/benchmarks/parsestream.upb_table.c
@@ -10,7 +10,6 @@ static upb_string *input_str;
 static upb_msgdef *def;
 static upb_decoder decoder;
 static upb_stringsrc stringsrc;
-upb_handlers handlers;
 
 static upb_sflow_t startsubmsg(void *_m, upb_value fval) {
   (void)_m;
@@ -61,11 +60,12 @@ static bool initialize()
     return false;
   }
 
-  upb_handlers_init(&handlers);
+  upb_handlers *handlers = upb_handlers_new();
   // Cause all messages to be read, but do nothing when they are.
   upb_handlerset hset = {NULL, NULL, value, startsubmsg, NULL, NULL, NULL};
-  upb_handlers_reghandlerset(&handlers, def, &hset);
-  upb_decoder_init(&decoder, &handlers);
+  upb_handlers_reghandlerset(handlers, def, &hset);
+  upb_decoder_init(&decoder, handlers);
+  upb_handlers_unref(handlers);
   upb_stringsrc_init(&stringsrc);
   return true;
 }
diff --git a/benchmarks/parsetostruct.upb_table.c b/benchmarks/parsetostruct.upb_table.c
index 10d1481..f05395f 100644
--- a/benchmarks/parsetostruct.upb_table.c
+++ b/benchmarks/parsetostruct.upb_table.c
@@ -12,7 +12,6 @@ static upb_msgdef *def;
 static upb_msg *msg;
 static upb_stringsrc strsrc;
 static upb_decoder d;
-static upb_handlers h;
 
 static bool initialize()
 {
@@ -53,9 +52,10 @@ static bool initialize()
   msg = upb_msg_new(def);
 
   upb_stringsrc_init(&strsrc);
-  upb_handlers_init(&h);
-  upb_msg_reghandlers(&h, def);
-  upb_decoder_init(&d, &h);
+  upb_handlers *handlers = upb_handlers_new();
+  upb_msg_reghandlers(handlers, def);
+  upb_decoder_init(&d, handlers);
+  upb_handlers_unref(handlers);
 
   if (!BYREF) {
     // Pretend the input string is stack-allocated, which will force its data