Push destroy fns to backend (#302)

* Make cubeb_device_info_destroy private.

* Move implementation of cubeb_device_collection_destroy to cubeb_utils.

* Move cubeb_device_collection_destroy implementation into backend.

Push the responsiblity for destroying device collections to the
backends so they can make independent choices on how to handle
allocation.

* Unstage space changes

1 files changed, 18 insertions, 0 deletions

diff --git a/src/cubeb_utils.h b/src/cubeb_utils.h
index b889cc8..00011ce 100644
--- a/src/cubeb_utils.h
+++ b/src/cubeb_utils.h
@@ -8,6 +8,10 @@
 #if !defined(CUBEB_UTILS)
 #define CUBEB_UTILS
 
+#include "cubeb/cubeb.h"
+
+#ifdef __cplusplus
+
 #include <stdint.h>
 #include <string.h>
 #include <assert.h>
@@ -330,5 +334,19 @@ private:
 };
 
 using auto_lock = std::lock_guard<owned_critical_section>;
+#endif // __cplusplus
+
+// C language helpers
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int cubeb_utils_default_device_collection_destroy(cubeb * context,
+                                                  cubeb_device_collection * collection);
+
+#ifdef __cplusplus
+}
+#endif
 
 #endif /* CUBEB_UTILS */