From a6b542b389d0536d2730c1721164a712ec2f020e Mon Sep 17 00:00:00 2001
From: Nikias Bassen
Date: Wed, 22 May 2019 11:32:11 +0200
Subject: Add new usbmuxd_events_subscribe/unsubscribe functions with a context
 so it can be used in different threads

---
 common/collection.c | 5 +++--
 common/collection.h | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

(limited to 'common')

diff --git a/common/collection.c b/common/collection.c
index ccc4016..d120b3e 100644
--- a/common/collection.c
+++ b/common/collection.c
@@ -57,16 +57,17 @@ void collection_add(struct collection *col, void *element)
 	col->capacity *= 2;
 }
 
-void collection_remove(struct collection *col, void *element)
+int collection_remove(struct collection *col, void *element)
 {
 	int i;
 	for(i=0; i<col->capacity; i++) {
 		if(col->list[i] == element) {
 			col->list[i] = NULL;
-			return;
+			return 0;
 		}
 	}
 	fprintf(stderr, "%s: WARNING: element %p not present in collection %p (cap %d)", __func__, element, col, col->capacity);
+	return -1;
 }
 
 int collection_count(struct collection *col)
diff --git a/common/collection.h b/common/collection.h
index a91a465..47b9b7f 100644
--- a/common/collection.h
+++ b/common/collection.h
@@ -29,7 +29,7 @@ struct collection {
 
 void collection_init(struct collection *col);
 void collection_add(struct collection *col, void *element);
-void collection_remove(struct collection *col, void *element);
+int collection_remove(struct collection *col, void *element);
 int collection_count(struct collection *col);
 void collection_free(struct collection *col);
 
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