Remove higher/big/ng references.

Author: gebner

lib/common/Pulse.Lib.Core.Refs.fsti

@@ -0,0 +1,226 @@
+(*
+   Copyright 2023 Microsoft Research
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*)
+
+module Pulse.Lib.Core.Refs
+open FStar.Ghost
+open PulseCore.FractionalPermission
+open PulseCore.Observability
+open FStar.PCM
+module T = FStar.Tactics.V2
+open Pulse.Lib.Dv {}
+open FStar.ExtractAs
+open Pulse.Lib.Core
+
+// These are PCM references in Type u#3 and should not be used directly.
+// The modules Pulse.Lib.(Ghost)PCMReference provide universe-polymorphic wrappers.
+
+////////////////////////////////////////////////////////
+//Core PCM references
+////////////////////////////////////////////////////////
+val core_pcm_ref : Type0
+val null_core_pcm_ref : core_pcm_ref
+val is_null_core_pcm_ref (p:core_pcm_ref)
+  : b:bool { b <==> p == null_core_pcm_ref }
+
+let pcm_ref
+    (#a:Type u#3)
+    (p:FStar.PCM.pcm a)
+: Type0
+= core_pcm_ref
+
+val pcm_pts_to
+    #a
+    (#p:pcm a)
+    ([@@@mkey] r:pcm_ref p)
+    (v:a)
+: slprop
+
+val timeless_pcm_pts_to
+    #a
+    (#p:pcm a)
+    (r:pcm_ref p)
+    (v:a)
+: Lemma (timeless (pcm_pts_to r v))
+        [SMTPat (timeless (pcm_pts_to r v))]
+
+let pcm_ref_null
+    (#a:Type)
+    (p:FStar.PCM.pcm a)
+: pcm_ref p
+= null_core_pcm_ref
+
+let is_pcm_ref_null
+    (#a:Type)
+    (#p:FStar.PCM.pcm a)
+    (r:pcm_ref p)
+: b:bool { b <==> r == pcm_ref_null p }
+= is_null_core_pcm_ref r
+
+val pts_to_not_null
+    (#a:Type)
+    (#p:FStar.PCM.pcm a)
+    (r:pcm_ref p)
+    (v:a)
+: stt_ghost (squash (not (is_pcm_ref_null r)))
+            emp_inames
+            (pcm_pts_to r v)
+            (fun _ -> pcm_pts_to r v)
+
+val alloc
+    #a
+    (#pcm:pcm a)
+    (x:a{pcm.refine x})
+: stt (pcm_ref pcm)
+      emp
+      (fun r -> pcm_pts_to r x)
+
+val read
+    (#a:Type)
+    (#p:pcm a)
+    (r:pcm_ref p)
+    (x:erased a)
+    (f:(v:a{compatible p x v}
+        -> GTot (y:a{compatible p y v /\
+                     FStar.PCM.frame_compatible p x v y})))
+: stt (v:a{compatible p x v /\ p.refine v})
+     (pcm_pts_to r x)
+     (fun v -> pcm_pts_to r (f v))
+
+val write
+    (#a:Type)
+    (#p:pcm a)
+    (r:pcm_ref p)
+    (x y:Ghost.erased a)
+    (f:FStar.PCM.frame_preserving_upd p x y)
+: stt unit
+     (pcm_pts_to r x)
+     (fun _ -> pcm_pts_to r y)
+
+val share
+    (#a:Type)
+    (#pcm:pcm a)
+    (r:pcm_ref pcm)
+    (v0:FStar.Ghost.erased a)
+    (v1:FStar.Ghost.erased a{composable pcm v0 v1})
+: stt_ghost unit
+    emp_inames
+    (pcm_pts_to r (v0 `op pcm` v1))
+    (fun _ -> pcm_pts_to r v0 ** pcm_pts_to r v1)
+
+[@@allow_ambiguous]
+val gather
+    (#a:Type)
+    (#pcm:pcm a)
+    (r:pcm_ref pcm)
+    (v0:FStar.Ghost.erased a)
+    (v1:FStar.Ghost.erased a)
+: stt_ghost (squash (composable pcm v0 v1))
+    emp_inames
+    (pcm_pts_to r v0 ** pcm_pts_to r v1)
+    (fun _ -> pcm_pts_to r (op pcm v0 v1))
+
+/////////////////////////////////////////////////////////////////////////
+[@@erasable]
+val core_ghost_pcm_ref : Type0
+
+val null_core_ghost_pcm_ref : core_ghost_pcm_ref
+
+let ghost_pcm_ref
+    (#a:Type u#3)
+    (p:FStar.PCM.pcm a)
+: Type0
+= core_ghost_pcm_ref
+
+val ghost_pcm_pts_to
+    #a
+    (#p:pcm a)
+    ([@@@mkey] r:ghost_pcm_ref p)
+    (v:a)
+: slprop
+
+val timeless_ghost_pcm_pts_to
+    #a
+    (#p:pcm a)
+    (r:ghost_pcm_ref p)
+    (v:a)
+: Lemma (timeless (ghost_pcm_pts_to r v))
+        [SMTPat (timeless (ghost_pcm_pts_to r v))]
+
+val ghost_pts_to_not_null
+    (#a:Type)
+    (#p:pcm a)
+    (r:ghost_pcm_ref p)
+    (v:a)
+: stt_ghost (squash (r =!= null_core_ghost_pcm_ref))
+            emp_inames
+            (ghost_pcm_pts_to r v)
+            (fun _ -> ghost_pcm_pts_to r v)
+
+val ghost_alloc
+    #a
+    (#pcm:pcm a)
+    (x:erased a{pcm.refine x})
+: stt_ghost (ghost_pcm_ref pcm)
+    emp_inames
+    emp
+    (fun r -> ghost_pcm_pts_to r x)
+
+val ghost_read
+    (#a:Type)
+    (#p:pcm a)
+    (r:ghost_pcm_ref p)
+    (x:erased a)
+    (f:(v:a{compatible p x v}
+        -> GTot (y:a{compatible p y v /\
+                     FStar.PCM.frame_compatible p x v y})))
+: stt_ghost (erased (v:a{compatible p x v /\ p.refine v}))
+    emp_inames
+    (ghost_pcm_pts_to r x)
+    (fun v -> ghost_pcm_pts_to r (f v))
+
+val ghost_write
+    (#a:Type)
+    (#p:pcm a)
+    (r:ghost_pcm_ref p)
+    (x y:Ghost.erased a)
+    (f:FStar.PCM.frame_preserving_upd p x y)
+: stt_ghost unit
+    emp_inames
+    (ghost_pcm_pts_to r x)
+    (fun _ -> ghost_pcm_pts_to r y)
+
+val ghost_share
+    (#a:Type)
+    (#pcm:pcm a)
+    (r:ghost_pcm_ref pcm)
+    (v0:FStar.Ghost.erased a)
+    (v1:FStar.Ghost.erased a{composable pcm v0 v1})
+: stt_ghost unit
+    emp_inames
+    (ghost_pcm_pts_to r (v0 `op pcm` v1))
+    (fun _ -> ghost_pcm_pts_to r v0 ** ghost_pcm_pts_to r v1)
+
+[@@allow_ambiguous]
+val ghost_gather
+    (#a:Type)
+    (#pcm:pcm a)
+    (r:ghost_pcm_ref pcm)
+    (v0:FStar.Ghost.erased a)
+    (v1:FStar.Ghost.erased a)
+: stt_ghost (squash (composable pcm v0 v1))
+    emp_inames
+    (ghost_pcm_pts_to r v0 ** ghost_pcm_pts_to r v1)
+    (fun _ -> ghost_pcm_pts_to r (op pcm v0 v1))