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Diffstat (limited to 'lib/remoteCounter.mli')
| -rw-r--r-- | lib/remoteCounter.mli | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/remoteCounter.mli b/lib/remoteCounter.mli new file mode 100644 index 0000000000..ae0605cfb7 --- /dev/null +++ b/lib/remoteCounter.mli @@ -0,0 +1,31 @@ +(************************************************************************) +(* * The Coq Proof Assistant / The Coq Development Team *) +(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *) +(* <O___,, * (see CREDITS file for the list of authors) *) +(* \VV/ **************************************************************) +(* // * This file is distributed under the terms of the *) +(* * GNU Lesser General Public License Version 2.1 *) +(* * (see LICENSE file for the text of the license) *) +(************************************************************************) + +(* Remote counters are *global* counters for fresh ids. In the master/slave + * scenario, the slave installs a getter that asks the master for a fresh + * value. In the scenario of a slave that runs after the death of the master + * on some marshalled data, a backup of all counters status should be taken and + * restored to avoid reusing ids. + * Counters cannot be created by threads, they must be created once and forall + * as toplevel module declarations. *) + + +type 'a getter = unit -> 'a +type 'a installer = ('a getter) -> unit + +val new_counter : name:string -> + 'a -> incr:('a -> 'a) -> build:('a -> 'b) -> 'b getter * 'b installer + +type remote_counters_status +val backup : unit -> remote_counters_status +(* like backup but makes a copy so that further increment does not alter + * the snapshot *) +val snapshot : unit -> remote_counters_status +val restore : remote_counters_status -> unit |