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Commit 2cbe04e6 authored by Robbert Krebbers's avatar Robbert Krebbers
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Use checkmark for valid.

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iris/agree.v
View file @ 2cbe04e6
......@@ -19,7 +19,7 @@ Global Instance agree_validN : ValidN (agree A) := λ n x,
Lemma agree_valid_le (x : agree A) n n' :
agree_is_valid x n → n' ≤ n → agree_is_valid x n'.
Proof. induction 2; eauto using agree_valid_S. Qed.
Global Instance agree_valid : Valid (agree A) := λ x, ∀ n, validN n x.
Global Instance agree_valid : Valid (agree A) := λ x, ∀ n, ✓{n} x.
Global Instance agree_equiv : Equiv (agree A) := λ x y,
(∀ n, agree_is_valid x n ↔ agree_is_valid y n) ∧
(∀ n, agree_is_valid x n → x n ={n}= y n).
......@@ -100,7 +100,7 @@ Proof.
* by intros x y n; rewrite agree_includedN.
Qed.
Lemma agree_op_inv (x y1 y2 : agree A) n :
validN n x → x ={n}= y1 ⋅ y2 → y1 ={n}= y2.
✓{n} x → x ={n}= y1 ⋅ y2 → y1 ={n}= y2.
Proof. by intros [??] Hxy; apply Hxy. Qed.
Global Instance agree_extend : CMRAExtend (agree A).
Proof.
......@@ -113,12 +113,12 @@ Program Definition to_agree (x : A) : agree A :=
Solve Obligations with done.
Global Instance to_agree_ne n : Proper (dist n ==> dist n) to_agree.
Proof. intros x1 x2 Hx; split; naive_solver eauto using @dist_le. Qed.
Lemma agree_car_ne (x y : agree A) n : validN n x → x ={n}= y → x n ={n}= y n.
Lemma agree_car_ne (x y : agree A) n : ✓{n} x → x ={n}= y → x n ={n}= y n.
Proof. by intros [??] Hxy; apply Hxy. Qed.
Lemma agree_cauchy (x : agree A) n i : n ≤ i → validN i x → x n ={n}= x i.
Lemma agree_cauchy (x : agree A) n i : n ≤ i → ✓{i} x → x n ={n}= x i.
Proof. by intros ? [? Hx]; apply Hx. Qed.
Lemma agree_to_agree_inj (x y : agree A) a n :
validN n x → x ={n}= to_agree a ⋅ y → x n ={n}= a.
✓{n} x → x ={n}= to_agree a ⋅ y → x n ={n}= a.
Proof.
by intros; transitivity ((to_agree a ⋅ y) n); [by apply agree_car_ne|].
Qed.
......
iris/auth.v
View file @ 2cbe04e6
......@@ -45,15 +45,15 @@ Qed.
Instance auth_empty `{Empty A} : Empty (auth A) := Auth ∅ ∅.
Instance auth_valid `{Equiv A, Valid A, Op A} : Valid (auth A) := λ x,
match authoritative x with
| Excl a => own x ≼ a ∧ valid a
| ExclUnit => valid (own x)
| Excl a => own x ≼ a ∧ ✓ a
| ExclUnit => ✓ (own x)
| ExclBot => False
end.
Arguments auth_valid _ _ _ _ !_ /.
Instance auth_validN `{Dist A, ValidN A, Op A} : ValidN (auth A) := λ n x,
match authoritative x with
| Excl a => own x ≼{n} a ∧ validN n a
| ExclUnit => validN n (own x)
| Excl a => own x ≼{n} a ∧ ✓{n} a
| ExclUnit => ✓{n} (own x)
| ExclBot => n = 0
end.
Arguments auth_validN _ _ _ _ _ !_ /.
......@@ -76,9 +76,9 @@ Proof.
intros [[z1 Hz1] [z2 Hz2]]; exists (Auth z1 z2); split; auto.
Qed.
Lemma authoritative_validN `{CMRA A} n (x : auth A) :
validN n x → validN n (authoritative x).
✓{n} x → ✓{n} (authoritative x).
Proof. by destruct x as [[]]. Qed.
Lemma own_validN `{CMRA A} n (x : auth A) : validN n x → validN n (own x).
Lemma own_validN `{CMRA A} n (x : auth A) : ✓{n} x → ✓{n} (own x).
Proof. destruct x as [[]]; naive_solver eauto using cmra_valid_includedN. Qed.
Instance auth_cmra `{CMRA A} : CMRA (auth A).
Proof.
......
iris/cmra.v
View file @ 2cbe04e6
......@@ -2,6 +2,7 @@ Require Export iris.ra iris.cofe.
Class ValidN (A : Type) := validN : nat → A → Prop.
Instance: Params (@validN) 3.
Notation "✓{ n }" := (validN n) (at level 1, format "✓{ n }").
Definition includedN `{Dist A, Op A} (n : nat) (x y : A) := ∃ z, y ={n}= x ⋅ z.
Notation "x ≼{ n } y" := (includedN n x y)
......@@ -14,32 +15,32 @@ Class CMRA A `{Equiv A, Compl A, Unit A, Op A, Valid A, ValidN A, Minus A} := {
cmra_cofe :> Cofe A;
cmra_op_ne n x :> Proper (dist n ==> dist n) (op x);
cmra_unit_ne n :> Proper (dist n ==> dist n) unit;
cmra_valid_ne n :> Proper (dist n ==> impl) (validN n);
cmra_valid_ne n :> Proper (dist n ==> impl) (✓{n});
cmra_minus_ne n :> Proper (dist n ==> dist n ==> dist n) minus;
(* valid *)
cmra_valid_0 x : validN 0 x;
cmra_valid_S n x : validN (S n) x → validN n x;
cmra_valid_validN x : valid x ↔ ∀ n, validN n x;
cmra_valid_0 x : ✓{0} x;
cmra_valid_S n x : ✓{S n} x → ✓{n} x;
cmra_valid_validN x : ✓ x ↔ ∀ n, ✓{n} x;
(* monoid *)
cmra_associative : Associative (≡) (⋅);
cmra_commutative : Commutative (≡) (⋅);
cmra_unit_l x : unit x ⋅ x ≡ x;
cmra_unit_idempotent x : unit (unit x) ≡ unit x;
cmra_unit_preserving n x y : x ≼{n} y → unit x ≼{n} unit y;
cmra_valid_op_l n x y : validN n (x ⋅ y) → validN n x;
cmra_valid_op_l n x y : ✓{n} (x ⋅ y) → ✓{n} x;
cmra_op_minus n x y : x ≼{n} y → x ⋅ y ⩪ x ={n}= y
}.
Class CMRAExtend A `{Equiv A, Dist A, Op A, ValidN A} :=
cmra_extend_op n x y1 y2 :
validN n x → x ={n}= y1 ⋅ y2 → { z | x ≡ z.1 ⋅ z.2 ∧ z ={n}= (y1,y2) }.
✓{n} x → x ={n}= y1 ⋅ y2 → { z | x ≡ z.1 ⋅ z.2 ∧ z ={n}= (y1,y2) }.
Class CMRAMonotone
`{Dist A, Op A, ValidN A, Dist B, Op B, ValidN B} (f : A → B) := {
includedN_preserving n x y : x ≼{n} y → f x ≼{n} f y;
validN_preserving n x : validN n x → validN n (f x)
validN_preserving n x : ✓{n} x → ✓{n} (f x)
}.
Hint Extern 0 (validN 0 _) => apply cmra_valid_0.
Hint Extern 0 (✓{0} _) => apply cmra_valid_0.
(** Bundeled version *)
Structure cmraT := CMRAT {
......@@ -73,12 +74,12 @@ Coercion cmra_cofeC (A : cmraT) : cofeT := CofeT A.
Canonical Structure cmra_cofeC.
(** Updates *)
Definition cmra_updateP `{Op A, ValidN A} (x : A) (P : A → Prop) :=
∀ z n, validN n (x ⋅ z) → ∃ y, P y ∧ validN n (y ⋅ z).
Definition cmra_updateP `{Op A, ValidN A} (x : A) (P : A → Prop) := ∀ z n,
✓{n} (x ⋅ z) → ∃ y, P y ∧ ✓{n} (y ⋅ z).
Instance: Params (@cmra_updateP) 3.
Infix "⇝:" := cmra_updateP (at level 70).
Definition cmra_update `{Op A, ValidN A} (x y : A) := ∀ z n,
validN n (x ⋅ z) → validN n (y ⋅ z).
✓{n} (x ⋅ z) → ✓{n} (y ⋅ z).
Infix "⇝" := cmra_update (at level 70).
Instance: Params (@cmra_update) 3.
......@@ -94,9 +95,9 @@ Proof.
symmetry; apply cmra_op_minus, Hxy.
Qed.
Global Instance cmra_valid_ne' : Proper (dist n ==> iff) (validN n) | 1.
Global Instance cmra_valid_ne' : Proper (dist n ==> iff) (✓{n}) | 1.
Proof. by split; apply cmra_valid_ne. Qed.
Global Instance cmra_valid_proper : Proper ((≡) ==> iff) (validN n) | 1.
Global Instance cmra_valid_proper : Proper ((≡) ==> iff) (✓{n}) | 1.
Proof. by intros n x1 x2 Hx; apply cmra_valid_ne', equiv_dist. Qed.
Global Instance cmra_ra : RA A.
Proof.
......@@ -110,19 +111,19 @@ Proof.
* intros x y [z Hz]; apply equiv_dist; intros n.
by apply cmra_op_minus; exists z; rewrite Hz.
Qed.
Lemma cmra_valid_op_r x y n : validN n (x ⋅ y) → validN n y.
Lemma cmra_valid_op_r x y n : ✓{n} (x ⋅ y) → ✓{n} y.
Proof. rewrite (commutative _ x); apply cmra_valid_op_l. Qed.
Lemma cmra_valid_le x n n' : validN n x → n' ≤ n → validN n' x.
Lemma cmra_valid_le x n n' : ✓{n} x → n' ≤ n → ✓{n'} x.
Proof. induction 2; eauto using cmra_valid_S. Qed.
Global Instance ra_op_ne n : Proper (dist n ==> dist n ==> dist n) (⋅).
Proof.
intros x1 x2 Hx y1 y2 Hy.
by rewrite Hy, (commutative _ x1), Hx, (commutative _ y2).
Qed.
Lemma cmra_unit_valid x n : validN n x → validN n (unit x).
Lemma cmra_unit_valid x n : ✓{n} x → ✓{n} (unit x).
Proof. rewrite <-(cmra_unit_l x) at 1; apply cmra_valid_op_l. Qed.
Lemma cmra_op_timeless `{!CMRAExtend A} x1 x2 :
validN 1 (x1 ⋅ x2) → Timeless x1 → Timeless x2 → Timeless (x1 ⋅ x2).
✓{1} (x1 ⋅ x2) → Timeless x1 → Timeless x2 → Timeless (x1 ⋅ x2).
Proof.
intros ??? z Hz.
destruct (cmra_extend_op 1 z x1 x2) as ([y1 y2]&Hz'&?&?); auto; simpl in *.
......@@ -159,9 +160,9 @@ Proof.
* intros x y z [z1 Hy] [z2 Hz]; exists (z1 ⋅ z2).
by rewrite (associative _), <-Hy, <-Hz.
Qed.
Lemma cmra_valid_includedN x y n : validN n y → x ≼{n} y → validN n x.
Lemma cmra_valid_includedN x y n : ✓{n} y → x ≼{n} y → ✓{n} x.
Proof. intros Hyv [z Hy]; rewrite Hy in Hyv; eauto using cmra_valid_op_l. Qed.
Lemma cmra_valid_included x y n : validN n y → x ≼ y → validN n x.
Lemma cmra_valid_included x y n : ✓{n} y → x ≼ y → ✓{n} x.
Proof. rewrite cmra_included_includedN; eauto using cmra_valid_includedN. Qed.
Lemma cmra_included_dist_l x1 x2 x1' n :
x1 ≼ x2 → x1' ={n}= x1 → ∃ x2', x1' ≼ x2' ∧ x2' ={n}= x2.
......@@ -203,7 +204,7 @@ Section discrete.
Existing Instances discrete_dist discrete_compl.
Let discrete_cofe' : Cofe A := discrete_cofe.
Instance discrete_validN : ValidN A := λ n x,
match n with 0 => True | S n => valid x end.
match n with 0 => True | S n => ✓ x end.
Instance discrete_cmra : CMRA A.
Proof.
split; try by (destruct ra; auto).
......@@ -224,13 +225,12 @@ Section discrete.
Qed.
Definition discreteRA : cmraT := CMRAT A.
Lemma discrete_updateP (x : A) (P : A → Prop) `{!Inhabited (sig P)} :
(∀ z, valid (x ⋅ z) → ∃ y, P y ∧ valid (y ⋅ z)) → x ⇝: P.
(∀ z, ✓ (x ⋅ z) → ∃ y, P y ∧ ✓ (y ⋅ z)) → x ⇝: P.
Proof.
intros Hvalid z [|n]; [|apply Hvalid].
by destruct (_ : Inhabited (sig P)) as [[y ?]]; exists y.
Qed.
Lemma discrete_update (x y : A) :
(∀ z, valid (x ⋅ z) → valid (y ⋅ z)) → x ⇝ y.
Lemma discrete_update (x y : A) : (∀ z, ✓ (x ⋅ z) → ✓ (y ⋅ z)) → x ⇝ y.
Proof. intros Hvalid z [|n]; [done|apply Hvalid]. Qed.
End discrete.
Arguments discreteRA _ {_ _ _ _ _ _}.
......@@ -241,9 +241,9 @@ Instance prod_empty `{Empty A, Empty B} : Empty (A * B) := (∅, ∅).
Instance prod_unit `{Unit A, Unit B} : Unit (A * B) := λ x,
(unit (x.1), unit (x.2)).
Instance prod_valid `{Valid A, Valid B} : Valid (A * B) := λ x,
valid (x.1) ∧ valid (x.2).
✓ (x.1) ∧ ✓ (x.2).
Instance prod_validN `{ValidN A, ValidN B} : ValidN (A * B) := λ n x,
validN n (x.1) ∧ validN n (x.2).
✓{n} (x.1) ∧ ✓{n} (x.2).
Instance prod_minus `{Minus A, Minus B} : Minus (A * B) := λ x y,
(x.1 ⩪ y.1, x.2 ⩪ y.2).
Lemma prod_included `{Equiv A, Equiv B, Op A, Op B} (x y : A * B) :
......
iris/cmra_maps.v
View file @ 2cbe04e6
......@@ -4,9 +4,9 @@ Require Import prelude.stringmap prelude.natmap.
(** option *)
Instance option_valid `{Valid A} : Valid (option A) := λ mx,
match mx with Some x => valid x | None => True end.
match mx with Some x => ✓ x | None => True end.
Instance option_validN `{ValidN A} : ValidN (option A) := λ n mx,
match mx with Some x => validN n x | None => True end.
match mx with Some x => ✓{n} x | None => True end.
Instance option_unit `{Unit A} : Unit (option A) := fmap unit.
Instance option_op `{Op A} : Op (option A) := union_with (λ x y, Some (x ⋅ y)).
Instance option_minus `{Minus A} : Minus (option A) :=
......@@ -34,7 +34,7 @@ Proof.
* by destruct 1; constructor; apply (_ : Proper (dist n ==> _) _).
* destruct 1 as [[?|] [?|]| |]; unfold validN, option_validN; simpl;
intros ?; auto using cmra_valid_0;
eapply (_ : Proper (dist _ ==> impl) (validN _)); eauto.
eapply (_ : Proper (dist _ ==> impl) (✓{_})); eauto.
* by destruct 1; inversion_clear 1; constructor;
repeat apply (_ : Proper (dist _ ==> _ ==> _) _).
* intros [x|]; unfold validN, option_validN; auto using cmra_valid_0.
......@@ -82,8 +82,8 @@ Section map.
Existing Instances map_dist map_compl map_cofe.
Instance map_op `{Op A} : Op (M A) := merge op.
Instance map_unit `{Unit A} : Unit (M A) := fmap unit.
Instance map_valid `{Valid A} : Valid (M A) := λ m, ∀ i, valid (m !! i).
Instance map_validN `{ValidN A} : ValidN (M A) := λ n m, ∀ i, validN n (m!!i).
Instance map_valid `{Valid A} : Valid (M A) := λ m, ∀ i, ✓ (m !! i).
Instance map_validN `{ValidN A} : ValidN (M A) := λ n m, ∀ i, ✓{n} (m!!i).
Instance map_minus `{Minus A} : Minus (M A) := merge minus.
Lemma lookup_op `{Op A} m1 m2 i : (m1 ⋅ m2) !! i = m1 !! i ⋅ m2 !! i.
Proof. by apply lookup_merge. Qed.
......@@ -116,7 +116,7 @@ Section map.
* by intros n m1 m2 Hm ? i; rewrite <-(Hm i).
* intros n m1 m1' Hm1 m2 m2' Hm2 i.
by rewrite !lookup_minus, (Hm1 i), (Hm2 i).
* intros m i; apply cmra_valid_0.
* by intros m i.
* intros n m Hm i; apply cmra_valid_S, Hm.
* intros m; split; [by intros Hm n i; apply cmra_valid_validN|].
intros Hm i; apply cmra_valid_validN; intros n; apply Hm.
......
iris/dra.v
View file @ 2cbe04e6
......@@ -26,13 +26,11 @@ Proof.
split; [|intros; transitivity y]; tauto.
Qed.
Instance validity_valid_proper `{Equiv A} (P : A → Prop) :
Proper ((≡) ==> iff) (valid : validity P → Prop).
Proper ((≡) ==> iff) (✓ : validity P → Prop).
Proof. intros ?? [??]; naive_solver. Qed.
Local Notation V := valid.
Definition dra_included `{Equiv A, Valid A, Disjoint A, Op A} := λ x y,
∃ z, y ≡ x ⋅ z ∧ V z ∧ x ⊥ z.
∃ z, y ≡ x ⋅ z ∧ ✓ z ∧ x ⊥ z.
Instance: Params (@dra_included) 4.
Local Infix "≼" := dra_included.
......@@ -44,21 +42,21 @@ Class DRA A `{Equiv A, Valid A, Unit A, Disjoint A, Op A, Minus A} := {
dra_disjoint_proper :> ∀ x, Proper ((≡) ==> impl) (disjoint x);
dra_minus_proper :> Proper ((≡) ==> (≡) ==> (≡)) minus;
(* validity *)
dra_op_valid x y : V x → V y → x ⊥ y → V (x ⋅ y);
dra_unit_valid x : V x → V (unit x);
dra_minus_valid x y : V x → V y → x ≼ y → V (y ⩪ x);
dra_op_valid x y : ✓ x → ✓ y → x ⊥ y → ✓ (x ⋅ y);
dra_unit_valid x : ✓ x → ✓ (unit x);
dra_minus_valid x y : ✓ x → ✓ y → x ≼ y → ✓ (y ⩪ x);
(* monoid *)
dra_associative :> Associative (≡) (⋅);
dra_disjoint_ll x y z : V x → V y → V z → x ⊥ y → x ⋅ y ⊥ z → x ⊥ z;
dra_disjoint_move_l x y z : V x → V y → V z → x ⊥ y → x ⋅ y ⊥ z → x ⊥ y ⋅ z;
dra_disjoint_ll x y z : ✓ x → ✓ y → ✓ z → x ⊥ y → x ⋅ y ⊥ z → x ⊥ z;
dra_disjoint_move_l x y z : ✓ x → ✓ y → ✓ z → x ⊥ y → x ⋅ y ⊥ z → x ⊥ y ⋅ z;
dra_symmetric :> Symmetric (@disjoint A _);
dra_commutative x y : V x → V y → x ⊥ y → x ⋅ y ≡ y ⋅ x;
dra_unit_disjoint_l x : V x → unit x ⊥ x;
dra_unit_l x : V x → unit x ⋅ x ≡ x;
dra_unit_idempotent x : V x → unit (unit x) ≡ unit x;
dra_unit_preserving x y : V x → V y → x ≼ y → unit x ≼ unit y;
dra_disjoint_minus x y : V x → V y → x ≼ y → x ⊥ y ⩪ x;
dra_op_minus x y : V x → V y → x ≼ y → x ⋅ y ⩪ x ≡ y
dra_commutative x y : ✓ x → ✓ y → x ⊥ y → x ⋅ y ≡ y ⋅ x;
dra_unit_disjoint_l x : ✓ x → unit x ⊥ x;
dra_unit_l x : ✓ x → unit x ⋅ x ≡ x;
dra_unit_idempotent x : ✓ x → unit (unit x) ≡ unit x;
dra_unit_preserving x y : ✓ x → ✓ y → x ≼ y → unit x ≼ unit y;
dra_disjoint_minus x y : ✓ x → ✓ y → x ≼ y → x ⊥ y ⩪ x;
dra_op_minus x y : ✓ x → ✓ y → x ≼ y → x ⋅ y ⩪ x ≡ y
}.
Section dra.
......@@ -72,14 +70,14 @@ Proof.
* by rewrite Hy, (symmetry_iff (⊥) x1), (symmetry_iff (⊥) x2), Hx.
* by rewrite <-Hy, (symmetry_iff (⊥) x2), (symmetry_iff (⊥) x1), <-Hx.
Qed.
Lemma dra_disjoint_rl x y z : V x → V y → V z → y ⊥ z → x ⊥ y ⋅ z → x ⊥ y.
Lemma dra_disjoint_rl x y z : ✓ x → ✓ y → ✓ z → y ⊥ z → x ⊥ y ⋅ z → x ⊥ y.
Proof. intros ???. rewrite !(symmetry_iff _ x). by apply dra_disjoint_ll. Qed.
Lemma dra_disjoint_lr x y z : V x → V y → V z → x ⊥ y → x ⋅ y ⊥ z → y ⊥ z.
Lemma dra_disjoint_lr x y z : ✓ x → ✓ y → ✓ z → x ⊥ y → x ⋅ y ⊥ z → y ⊥ z.
Proof.
intros ????. rewrite dra_commutative by done. by apply dra_disjoint_ll.
Qed.
Lemma dra_disjoint_move_r x y z :
V x → V y → V z → y ⊥ z → x ⊥ y ⋅ z → x ⋅ y ⊥ z.
✓ x → ✓ y → ✓ z → y ⊥ z → x ⊥ y ⋅ z → x ⋅ y ⊥ z.
Proof.
intros; symmetry; rewrite dra_commutative by eauto using dra_disjoint_rl.
apply dra_disjoint_move_l; auto; by rewrite dra_commutative.
......@@ -87,20 +85,20 @@ Qed.
Hint Immediate dra_disjoint_move_l dra_disjoint_move_r.
Hint Unfold dra_included.
Notation T := (validity (valid : A → Prop)).
Lemma validity_valid_car_valid (z : T) : V z → V (validity_car z).
Notation T := (validity (✓ : A → Prop)).
Lemma validity_valid_car_valid (z : T) : ✓ z → ✓ (validity_car z).
Proof. apply validity_prf. Qed.
Hint Resolve validity_valid_car_valid.
Program Instance validity_unit : Unit T := λ x,
Validity (unit (validity_car x)) (V x) _.
Validity (unit (validity_car x)) (✓ x) _.
Solve Obligations with naive_solver auto using dra_unit_valid.
Program Instance validity_op : Op T := λ x y,
Validity (validity_car x ⋅ validity_car y)
(V x ∧ V y ∧ validity_car x ⊥ validity_car y) _.
(✓ x ∧ ✓ y ∧ validity_car x ⊥ validity_car y) _.
Solve Obligations with naive_solver auto using dra_op_valid.
Program Instance validity_minus : Minus T := λ x y,
Validity (validity_car x ⩪ validity_car y)
(V x ∧ V y ∧ validity_car y ≼ validity_car x) _.
(✓ x ∧ ✓ y ∧ validity_car y ≼ validity_car x) _.
Solve Obligations with naive_solver auto using dra_minus_valid.
Instance validity_ra : RA T.
Proof.
......@@ -135,7 +133,7 @@ Proof.
Qed.
Definition validityRA : cmraT := discreteRA T.
Definition validity_update (x y : validityRA) :
(∀ z, V x → V z → validity_car x ⊥ z → V y ∧ validity_car y ⊥ z) → x ⇝ y.
(∀ z, ✓ x → ✓ z → validity_car x ⊥ z → ✓ y ∧ validity_car y ⊥ z) → x ⇝ y.
Proof.
intros Hxy; apply discrete_update.
intros z (?&?&?); split_ands'; try eapply Hxy; eauto.
......
iris/excl.v
View file @ 2cbe04e6
......@@ -114,7 +114,7 @@ Proof.
Qed.
(* Updates *)
Lemma excl_update {A} (x : A) y : valid y → Excl x ⇝ y.
Lemma excl_update {A} (x : A) y : ✓ y → Excl x ⇝ y.
Proof. by destruct y; intros ? [?| |]. Qed.
(* Functor *)
......
iris/logic.v
View file @ 2cbe04e6
......@@ -8,7 +8,7 @@ Structure uPred (M : cmraT) : Type := IProp {
uPred_ne x1 x2 n : uPred_holds n x1 → x1 ={n}= x2 → uPred_holds n x2;
uPred_0 x : uPred_holds 0 x;
uPred_weaken x1 x2 n1 n2 :
uPred_holds n1 x1 → x1 ≼ x2 → n2 ≤ n1 → validN n2 x2 → uPred_holds n2 x2
uPred_holds n1 x1 → x1 ≼ x2 → n2 ≤ n1 → ✓{n2} x2 → uPred_holds n2 x2
}.
Arguments uPred_holds {_} _ _ _.
Hint Resolve uPred_0.
......@@ -16,9 +16,9 @@ Add Printing Constructor uPred.
Instance: Params (@uPred_holds) 3.
Instance uPred_equiv (M : cmraT) : Equiv (uPred M) := λ P Q, ∀ x n,
validN n x → P n x ↔ Q n x.
✓{n} x → P n x ↔ Q n x.
Instance uPred_dist (M : cmraT) : Dist (uPred M) := λ n P Q, ∀ x n',
n' ≤ n → validN n' x → P n' x ↔ Q n' x.
n' ≤ n → ✓{n'} x → P n' x ↔ Q n' x.
Program Instance uPred_compl (M : cmraT) : Compl (uPred M) := λ c,
{| uPred_holds n x := c n n x |}.
Next Obligation. by intros M c x y n ??; simpl in *; apply uPred_ne with x. Qed.
......@@ -72,7 +72,7 @@ Qed.
(** logical entailement *)
Instance uPred_entails {M} : SubsetEq (uPred M) := λ P Q, ∀ x n,
validN n x → P n x → Q n x.
✓{n} x → P n x → Q n x.
(** logical connectives *)
Program Definition uPred_const {M} (P : Prop) : uPred M :=
......@@ -89,12 +89,12 @@ Program Definition uPred_or {M} (P Q : uPred M) : uPred M :=
Solve Obligations with naive_solver eauto 2 using uPred_ne, uPred_weaken.
Program Definition uPred_impl {M} (P Q : uPred M) : uPred M :=
{| uPred_holds n x := ∀ x' n',
x ≼ x' → n' ≤ n → validN n' x' → P n' x' → Q n' x' |}.
x ≼ x' → n' ≤ n → ✓{n'} x' → P n' x' → Q n' x' |}.
Next Obligation.
intros M P Q x1' x1 n1 HPQ Hx1 x2 n2 ????.
destruct (cmra_included_dist_l x1 x2 x1' n1) as (x2'&?&Hx2); auto.
assert (x2' ={n2}= x2) as Hx2' by (by apply dist_le with n1).
assert (validN n2 x2') by (by rewrite Hx2'); rewrite <-Hx2'.
assert (✓{n2} x2') by (by rewrite Hx2'); rewrite <-Hx2'.
eauto using uPred_weaken, uPred_ne.
Qed.
Next Obligation. intros M P Q x1 x2 [|n]; auto with lia. Qed.
......@@ -134,7 +134,7 @@ Qed.
Program Definition uPred_wand {M} (P Q : uPred M) : uPred M :=
{| uPred_holds n x := ∀ x' n',
n' ≤ n → validN n' (x ⋅ x') → P n' x' → Q n' (x ⋅ x') |}.
n' ≤ n → ✓{n'} (x ⋅ x') → P n' x' → Q n' (x ⋅ x') |}.
Next Obligation.
intros M P Q x1 x2 n1 HPQ Hx x3 n2 ???; simpl in *.
rewrite <-(dist_le _ _ _ _ Hx) by done; apply HPQ; auto.
......@@ -172,7 +172,7 @@ Next Obligation.
exists (a' ⋅ x2). by rewrite (associative op), <-(dist_le _ _ _ _ Hx1), Hx.
Qed.
Program Definition uPred_valid {M : cmraT} (a : M) : uPred M :=
{| uPred_holds n x := validN n a |}.
{| uPred_holds n x := ✓{n} a |}.
Solve Obligations with naive_solver eauto 2 using cmra_valid_le, cmra_valid_0.
Delimit Scope uPred_scope with I.
......@@ -196,11 +196,12 @@ Notation "∃ x .. y , P" :=
Notation "▷ P" := (uPred_later P) (at level 20) : uPred_scope.
Notation "□ P" := (uPred_always P) (at level 20) : uPred_scope.
Infix "≡" := uPred_eq : uPred_scope.
Notation "✓" := uPred_valid (at level 1) : uPred_scope.
Definition uPred_iff {M} (P Q : uPred M) : uPred M := ((P → Q) ∧ (Q → P))%I.
Infix "↔" := uPred_iff : uPred_scope.
Class TimelessP {M} (P : uPred M) := timelessP x n : validN 1 x → P 1 x → P n x.
Class TimelessP {M} (P : uPred M) := timelessP x n : ✓{1} x → P 1 x → P n x.
Section logic.
Context {M : cmraT}.
......@@ -687,7 +688,7 @@ Proof.
Qed.
Lemma uPred_own_empty `{Empty M, !RAEmpty M} : True%I ⊆ uPred_own ∅.
Proof. intros x [|n] ??; [done|]. by exists x; rewrite (left_id _ _). Qed.
Lemma uPred_own_valid (a : M) : uPred_own a ⊆ uPred_valid a.
Lemma uPred_own_valid (a : M) : uPred_own a ⊆ (✓ a)%I.
Proof.
intros x n Hv [a' Hx]; simpl; rewrite Hx in Hv; eauto using cmra_valid_op_l.
Qed.
......
iris/ra.v
View file @ 2cbe04e6
......@@ -2,6 +2,7 @@ Require Export prelude.collections prelude.relations prelude.fin_maps.
Class Valid (A : Type) := valid : A → Prop.
Instance: Params (@valid) 2.
Notation "✓" := valid (at level 1).
Class Unit (A : Type) := unit : A → A.
Instance: Params (@unit) 2.
......@@ -26,7 +27,7 @@ Class RA A `{Equiv A, Valid A, Unit A, Op A, Minus A} : Prop := {
ra_equivalence :> Equivalence ((≡) : relation A);
ra_op_proper x :> Proper ((≡) ==> (≡)) (op x);
ra_unit_proper :> Proper ((≡) ==> (≡)) unit;
ra_valid_proper :> Proper ((≡) ==> impl) valid;
ra_valid_proper :> Proper ((≡) ==> impl) ✓;
ra_minus_proper :> Proper ((≡) ==> (≡) ==> (≡)) minus;
(* monoid *)
ra_associative :> Associative (≡) (⋅);
......@@ -34,18 +35,18 @@ Class RA A `{Equiv A, Valid A, Unit A, Op A, Minus A} : Prop := {
ra_unit_l x : unit x ⋅ x ≡ x;
ra_unit_idempotent x : unit (unit x) ≡ unit x;
ra_unit_preserving x y : x ≼ y → unit x ≼ unit y;
ra_valid_op_l x y : valid (x ⋅ y) → valid x;
ra_valid_op_l x y : ✓ (x ⋅ y) → ✓ x;
ra_op_minus x y : x ≼ y → x ⋅ y ⩪ x ≡ y
}.
Class RAEmpty A `{Equiv A, Valid A, Op A, Empty A} : Prop := {
ra_empty_valid : valid ∅;
ra_empty_valid : ✓ ∅;
ra_empty_l :> LeftId (≡) ∅ (⋅)
}.
Class RAMonotone
`{Equiv A, Op A, Valid A, Equiv B, Op B, Valid B} (f : A → B) := {
included_preserving x y : x ≼ y → f x ≼ f y;
valid_preserving x : valid x → valid (f x)
valid_preserving x : ✓ x → ✓ (f x)
}.
(** Big ops *)
......@@ -60,11 +61,11 @@ Instance: Params (@big_opM) 4.
(** Updates *)
Definition ra_update_set `{Op A, Valid A} (x : A) (P : A → Prop) :=
∀ z, valid (x ⋅ z) → ∃ y, P y ∧ valid (y ⋅ z).
∀ z, ✓ (x ⋅ z) → ∃ y, P y ∧ ✓ (y ⋅ z).
Instance: Params (@ra_update_set) 3.
Infix "⇝:" := ra_update_set (at level 70).
Definition ra_update `{Op A, Valid A} (x y : A) := ∀ z,
valid (x ⋅ z) → valid (y ⋅ z).
✓ (x ⋅ z) → ✓ (y ⋅ z).
Infix "⇝" := ra_update (at level 70).
Instance: Params (@ra_update) 3.
......@@ -74,14 +75,14 @@ Context `{RA A}.
Implicit Types x y z : A.
Implicit Types xs ys zs : list A.
Global Instance ra_valid_proper' : Proper ((≡) ==> iff) valid.
Global Instance ra_valid_proper' : Proper ((≡) ==> iff) ✓.
Proof. by intros ???; split; apply ra_valid_proper. Qed.
Global Instance ra_op_proper' : Proper ((≡) ==> (≡) ==> (≡)) (⋅).
Proof.
intros x1 x2 Hx y1 y2 Hy.
by rewrite Hy, (commutative _ x1), Hx, (commutative _ y2).
Qed.
Lemma ra_valid_op_r x y : valid (x ⋅ y) → valid y.
Lemma ra_valid_op_r x y : ✓ (x ⋅ y) → ✓ y.
Proof. rewrite (commutative _ x); apply ra_valid_op_l. Qed.
(** ** Units *)
......
iris/sts.v
View file @ 2cbe04e6
......@@ -188,7 +188,7 @@ End sts.
Section sts_ra.
Context {A B : Type} (R : relation A) (tok : A → set B).
Definition sts := validity (valid : sts.t R tok → Prop).
Definition sts := validity (✓ : sts.t R tok → Prop).
Global Instance sts_equiv : Equiv sts := validity_equiv _.
Global Instance sts_unit : Unit sts := validity_unit _.
Global Instance sts_op : Op sts := validity_op _.
......
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