diff options
Diffstat (limited to 'libs/ardour/ardour/source.h')
-rw-r--r-- | libs/ardour/ardour/source.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libs/ardour/ardour/source.h b/libs/ardour/ardour/source.h index bf92e5a6e4..16a762eb94 100644 --- a/libs/ardour/ardour/source.h +++ b/libs/ardour/ardour/source.h @@ -23,6 +23,8 @@ #include <string> #include <set> +#include <glib.h> + #include <boost/utility.hpp> #include "pbd/statefuldestructible.h" @@ -102,6 +104,15 @@ class Source : public SessionObject Glib::Mutex& mutex() { return _lock; } Flag flags() const { return _flags; } + void inc_use_count () { g_atomic_int_inc (&_use_count); } + void dec_use_count () { + gint oldval = g_atomic_int_exchange_and_add (&_use_count, -1); + assert (oldval > 0); + } + + int use_count() const { return g_atomic_int_get (&_use_count); } + bool used() const { return use_count() > 0; } + protected: DataType _type; Flag _flags; @@ -111,6 +122,7 @@ class Source : public SessionObject mutable Glib::Mutex _lock; mutable Glib::Mutex _analysis_lock; Glib::Mutex _playlist_lock; + gint _use_count; /* atomic */ private: void fix_writable_flags (); |