Added a team watching mechanism in the kernel, not yet tested (but at least doesn't cause any harm yet :-)).

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13888 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/team.h

@@ -32,6 +32,9 @@ struct team *team_get_team_struct_locked(team_id id);
 int32 team_max_teams(void);
 int32 team_used_teams(void);
 
+status_t start_watching_team(team_id team, void (*hook)(team_id, void *), void *data);
+status_t stop_watching_team(team_id team, void (*hook)(team_id, void *), void *data);
+
 // used in syscalls.c
 thread_id _user_load_image(int32 argCount, const char **args, int32 envCount,
 				const char **envp, int32 priority, uint32 flags);

headers/private/kernel/thread_types.h

@@ -78,6 +78,12 @@ struct team_loading_info {
 	bool			done;		// set when loading is done/aborted
 };
 
+struct team_watcher {
+	struct list_link	link;
+	void				(*hook)(team_id team, void *data);
+	void				*data;
+};
+
 #define MAX_DEAD_CHILDREN	32
 	// this is a soft limit for the number of dead entries in a team
 
@@ -111,6 +117,7 @@ struct team {
 	struct thread	*thread_list;
 	struct team_loading_info *loading_info;
 	struct list		image_list;
+	struct list		watcher_list;
 	struct arch_team arch_info;
 
 	struct team_debug_info debug_info;