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| author | Jacques Garrigue <garrigue at math.nagoya-u.ac.jp> | 1999-11-30 14:59:39 +0000 |
|---|---|---|
| committer | Jacques Garrigue <garrigue at math.nagoya-u.ac.jp> | 1999-11-30 14:59:39 +0000 |
| commit | ca0b21c5adbe660a52e5a9dfe1dda16985fe5f7c (patch) | |
| tree | e202ba49531807a7a6c2bd46f37b2bbbeb170d0f /otherlibs/labltk/support/timer.ml | |
| parent | 68ba9a8c42b0197bc415de2f81aa6d0c8e84780a (diff) | |
Add to HEAD branch
git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@2649 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Diffstat (limited to 'otherlibs/labltk/support/timer.ml')
| -rw-r--r-- | otherlibs/labltk/support/timer.ml | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/otherlibs/labltk/support/timer.ml b/otherlibs/labltk/support/timer.ml new file mode 100644 index 000000000..7a1a8f001 --- /dev/null +++ b/otherlibs/labltk/support/timer.ml @@ -0,0 +1,33 @@ +(* $Id$ *) + +(* Timers *) +open Protocol + +type tkTimer = int + +external internal_add_timer : int -> cbid -> tkTimer + = "camltk_add_timer" +external internal_rem_timer : tkTimer -> unit + = "camltk_rem_timer" + +type t = tkTimer * cbid (* the token and the cb id *) + +(* A timer is used only once, so we must clean the callback table *) +let add ms:milli callback:f = + let id = new_function_id () in + let wrapped _ = + clear_callback id; (* do it first in case f raises exception *) + f() in + Hashtbl.add callback_naming_table key:id data:wrapped; + if !Protocol.debug then begin + prerr_cbid id; prerr_endline " for timer" + end; + let t = internal_add_timer milli id in + t,id + +(* If the timer has never been used, there is a small space leak in + the C heap, where a copy of id has been stored *) +let remove (tkTimer, id) = + internal_rem_timer tkTimer; + clear_callback id + |