Plain_Memory : Type = [#mem : Memor

Plain_Memory : Type = [#
mem : Memory_struct[State], % see page 198 (Section 2.2)
states : PRED[State], % states fulfilling the plain memory properties
ro_addr : PRED[Address], % read–blessed addresses
rw_addr : PRED[Address] % read/write–blessed addresses
#]
Here, the type constructor PRED constructs the type of all predicates over its
argument type. For instance, PRED[State] is equal to [State → bool]. Record fields
in PVS can be accessed with two equivalent syntaxes. If pm is of type Plain_Memory,
then both mem(pm) and pm‘mem denote its first field.
The properties of plain memory are specified as follows.
plain_memory?(pm) : bool =
unchanged_memory_invariant?(pm‘mem, pm‘states,
all permitted state transformers except write access to pm‘rw_addr,
union(pm‘ro_addr, pm‘rw_addr)) ∧
unchanged_memory_invariant?(pm‘mem, pm‘states,
memory_write_transformers(pm‘mem, pm‘rw_addr),
pm‘ro_addr) ∧
unchanged_memory_write_invariant?(pm‘mem, pm‘states, pm‘rw_addr) ∧
changed_memory_invariant?(pm‘mem, pm‘states, pm‘rw_addr) ∧
transformers_ok?(pm‘states,
all permitted state transformers) ∧
side_effect_content_unchanged(union(pm‘ro_addr, pm‘rw_addr), pm‘states,
memory_read_side_effect(pm‘mem)) ∧
side_effect_content_unchanged(pm‘rw_addr, pm‘states,
memory_write_side_effect(pm‘mem))

Hasil (Bahasa Indonesia) 1:

Plain_Memory: Ketik = [#mem: Memory_struct [negara], % lihat halaman 198 (Bagian 2.2)negara: PRED [negara], % menyatakan memenuhi sifat polos memoriro_addr: PRED [alamat], alamat Baca – diberkati %rw_addr: PRED [alamat] % membaca/menulis-Berbahagialah alamat#]Di sini, constructor jenis PRED konstruksi jenis semua predikat atas yangjenis argumen. Sebagai contoh, PRED [negara] sama [negara → bool]. Bidang catatandi PVS dapat diakses dengan dua syntaxes setara. Jika pm adalah jenis Plain_Memory,kemudian mem(pm) dan pm'mem menandakan field yang pertama.Sifat-sifat memori polos ditentukan sebagai berikut.plain_memory?(pm): bool =unchanged_memory_invariant?(pm'mem, pm'states,Semua diizinkan transformer negara kecuali akses menulis ke pm'rw_addr,Union (pm 'ro_addr, pm' rw_addr)) ∧unchanged_memory_invariant?(pm'mem, pm'states,memory_write_transformers (pm'mem, pm'rw_addr),PM'ro_addr) ∧unchanged_memory_write_invariant?(pm'mem, pm'states, pm'rw_addr) ∧changed_memory_invariant?(pm'mem, pm'states, pm'rw_addr) ∧transformers_ok?(pm'states,Semua diperbolehkan negara transformer) ∧side_effect_content_unchanged (Persatuan (pm 'ro_addr, pm' rw_addr), pm'states,memory_read_side_effect(pm'mem)) ∧side_effect_content_unchanged (pm'rw_addr, pm'states,memory_write_side_effect(pm'mem))

Hasil (Bahasa Indonesia) 2:

Plain_Memory: Type = [#
mem: Memory_struct [Negara], lihat halaman 198% (Bagian 2.2)
menyatakan: PRED [Negara],% negara memenuhi sifat memori polos
ro_addr: alamat PRED [Alamat],% baca-diberkati
rw_addr: PRED [Alamat]% read / write-diberkati alamat
#]
Di sini, jenis konstruktor PRED membangun tipe semua predikat atas yang
jenis argumen. Misalnya, PRED [Negara] sama dengan [Negara → bool]. Bidang Rekam
di PVS dapat diakses dengan dua sintaks setara. Jika pm adalah tipe Plain_Memory,
maka kedua mem (pm) dan pm'mem menunjukkan lapangan pertama.
Sifat memori polos ditentukan sebagai berikut.
plain_memory (pm): bool =
? unchanged_memory_invariant (pm'mem, pm'states ,
semua transformer negara diizinkan kecuali akses tulis untuk pm'rw_addr,
serikat (pm'ro_addr, pm'rw_addr)) ∧
unchanged_memory_invariant? (pm'mem, pm'states,
memory_write_transformers (pm'mem, pm'rw_addr),
pm'ro_addr ) ∧
unchanged_memory_write_invariant? (pm'mem, pm'states, pm'rw_addr) ∧
changed_memory_invariant? (pm'mem, pm'states, pm'rw_addr) ∧
transformers_ok? (pm'states,
semua transformer negara diijinkan) ∧
side_effect_content_unchanged (union (pm'ro_addr, pm'rw_addr), pm'states,
memory_read_side_effect (pm'mem)) ∧
side_effect_content_unchanged (pm'rw_addr, pm'states,
memory_write_side_effect (pm'mem))