opts: Add getter for cached memory

include/git2/common.h

@@ -133,7 +133,8 @@ enum {
 	GIT_OPT_SET_SEARCH_PATH,
 	GIT_OPT_SET_CACHE_OBJECT_LIMIT,
 	GIT_OPT_SET_CACHE_MAX_SIZE,
-	GIT_OPT_ENABLE_CACHING
+	GIT_OPT_ENABLE_CACHING,
+	GIT_OPT_GET_CACHED_MEMORY
 };
 
 /**

src/cache.c

@@ -19,8 +19,7 @@ GIT__USE_OIDMAP
 
 bool git_cache__enabled = true;
 int64_t git_cache__max_storage = (256 * 1024 * 1024);
-
-static git_atomic64 git_cache__current_storage = {0};
+git_atomic64 git_cache__current_storage = {0};
 
 static size_t git_cache__max_object_size[8] = {
 	0,     /* GIT_OBJ__EXT1 */

src/cache.h

@@ -36,6 +36,7 @@ typedef struct {
 
 extern bool git_cache__enabled;
 extern int64_t git_cache__max_storage;
+extern git_atomic64 git_cache__current_storage;
 
 int git_cache_set_max_object_size(git_otype type, size_t size);
 

src/util.c

@@ -109,6 +109,11 @@ int git_libgit2_opts(int key, ...)
 	case GIT_OPT_ENABLE_CACHING:
 		git_cache__enabled = (va_arg(ap, int) != 0);
 		break;
+
+	case GIT_OPT_GET_CACHED_MEMORY:
+		*(va_arg(ap, int64_t *)) = git_cache__current_storage.val;
+		*(va_arg(ap, int64_t *)) = git_cache__max_storage;
+		break;
 	}
 
 	va_end(ap);