From 06a87606cdef8af477c4341d764102c0d3f3e7e2 Mon Sep 17 00:00:00 2001
From: cbdev <cb@cbcdn.com>
Date: Mon, 13 Nov 2017 03:08:49 +0100
Subject: Add debug messages

---
 backend.c     | 6 ++++++
 makefile      | 1 +
 midimonster.c | 3 +++
 3 files changed, 10 insertions(+)

diff --git a/backend.c b/backend.c
index eeb789d..38abc7f 100644
--- a/backend.c
+++ b/backend.c
@@ -26,6 +26,7 @@ int backends_handle(size_t nfds, managed_fd* fds){
 			}
 		}
 
+		DBGPF("Notifying backend %s of %zu waiting FDs\n", backends[u].name, n);
 		rv |= backends[u].process(n, fds);
 	}
 	return rv;
@@ -55,6 +56,7 @@ int backends_notify(size_t nev, channel** c, channel_value* v){
 			}
 		}
 
+		DBGPF("Calling handler for instance %s with %zu events\n", instances[u]->name, n);
 		rv |= instances[u]->backend->handle(instances[u], n, c, v);
 	}
 
@@ -65,14 +67,17 @@ channel* mm_channel(instance* i, uint64_t ident, uint8_t create){
 	size_t u;
 	for(u = 0; u < nchannels; u++){
 		if(channels[u]->instance == i && channels[u]->ident == ident){
+			DBGPF("Requested channel %zu on instance %s already exists, reusing\n", ident, i->name);
 			return channels[u];
 		}
 	}
 
 	if(!create){
+		DBGPF("Requested unknown channel %zu on instance %s\n", ident, i->name);
 		return NULL;
 	}
 
+	DBGPF("Creating previously unknown channel %zu on instance %s\n", ident, i->name);
 	channel** new_chan = realloc(channels, (nchannels + 1) * sizeof(channel*));
 	if(!new_chan){
 		fprintf(stderr, "Failed to allocate memory\n");
@@ -169,6 +174,7 @@ void instances_free(){
 void channels_free(){
 	size_t u;
 	for(u = 0; u < nchannels; u++){
+		DBGPF("Destroying channel %zu on instance %s\n", channels[u]->ident, channels[u]->instance->name);
 		if(channels[u]->impl){
 			channels[u]->instance->backend->channel_free(channels[u]);
 		}
diff --git a/makefile b/makefile
index 2101e96..f87005e 100644
--- a/makefile
+++ b/makefile
@@ -4,6 +4,7 @@ OBJS = config.o backend.o plugin.o
 PLUGINDIR = "\"./\""
 
 CFLAGS ?= -g -Wall
+#CFLAGS += -DDEBUG
 %.so: CFLAGS += -fPIC
 %.so: LDFLAGS += -shared
 
diff --git a/midimonster.c b/midimonster.c
index 8f30686..c8a0109 100644
--- a/midimonster.c
+++ b/midimonster.c
@@ -248,6 +248,7 @@ int main(int argc, char** argv){
 	}
 
 	//create initial fd set
+	DBGPF("Building selector set from %zu FDs registered to core\n", fds);
 	FD_ZERO(&all_fds);
 	for(u = 0; u < fds; u++){
 		if(fd[u].fd >= 0){
@@ -277,6 +278,7 @@ int main(int argc, char** argv){
 		}
 
 		//run backend processing, collect events
+		DBGPF("%zu backend FDs signaled\n", n);
 		if(backends_handle(n, signaled_fds)){
 			fprintf(stderr, "Backends failed to handle input\n");
 			goto bail;
@@ -284,6 +286,7 @@ int main(int argc, char** argv){
 
 		while(primary->n){
 			//swap primary and secondary event collectors
+			DBGPF("Swapping event collectors, %zu events in primary\n", primary->n);
 			for(u = 0; u < sizeof(event_pool)/sizeof(event_collection); u++){
 				if(primary != event_pool + u){
 					secondary = primary;
-- 
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