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PAtomicU8

vstd::atomic

Struct PAtomicU8 

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pub struct PAtomicU8 { /* private fields */ }

Implementations§

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impl PAtomicU8

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pub uninterp fn id(&self) -> int

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pub const exec fn new(i: u8) -> res : (PAtomicU8, Tracked<PermissionU8>)

ensures
equal(
    res.1@.view(),
    PermissionDataU8 {
        patomic: res.0.id(),
        value: i,
    },
),
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pub exec fn load(&self, Tracked(perm): Tracked<&PermissionU8>) -> ret : u8

requires
equal(self.id(), perm.view().patomic),
ensures
equal(perm.view().value, ret),
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pub exec fn store(&self, Tracked(perm): Tracked<&mut PermissionU8>, v: u8)

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(perm.view().value, v) && equal(self.id(), perm.view().patomic),
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pub exec fn compare_exchange( &self, verus_tmp_perm: Tracked<&mut PermissionU8>, current: u8, new: u8, ) -> ret : Result<u8, u8>

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(self.id(), perm.view().patomic)
    && match ret {
        Result::Ok(r) => {
            current == old(perm).view().value && equal(perm.view().value, new)
                && equal(r, old(perm).view().value)
        }
        Result::Err(r) => {
            current != old(perm).view().value
                && equal(perm.view().value, old(perm).view().value)
                && equal(r, old(perm).view().value)
        }
    },
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pub exec fn compare_exchange_weak( &self, verus_tmp_perm: Tracked<&mut PermissionU8>, current: u8, new: u8, ) -> ret : Result<u8, u8>

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(self.id(), perm.view().patomic)
    && match ret {
        Result::Ok(r) => {
            current == old(perm).view().value && equal(perm.view().value, new)
                && equal(r, old(perm).view().value)
        }
        Result::Err(r) => {
            equal(perm.view().value, old(perm).view().value)
                && equal(r, old(perm).view().value)
        }
    },
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pub exec fn swap(&self, Tracked(perm): Tracked<&mut PermissionU8>, v: u8) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(perm.view().value, v) && equal(old(perm).view().value, ret)
    && equal(self.id(), perm.view().patomic),
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pub exec fn into_inner(self, Tracked(perm): Tracked<PermissionU8>) -> ret : u8

requires
equal(self.id(), perm.view().patomic),
ensures
equal(perm.view().value, ret),
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pub exec fn fetch_add_wrapping( &self, verus_tmp_perm: Tracked<&mut PermissionU8>, n: u8, ) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(old(perm).view().value, ret),
perm.view().patomic == old(perm).view().patomic,
perm.view().value as int == u8_specs::wrapping_add(old(perm).view().value, n),
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pub exec fn fetch_sub_wrapping( &self, verus_tmp_perm: Tracked<&mut PermissionU8>, n: u8, ) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(old(perm).view().value, ret),
perm.view().patomic == old(perm).view().patomic,
perm.view().value as int == u8_specs::wrapping_sub(old(perm).view().value, n),
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pub exec fn fetch_add(&self, Tracked(perm): Tracked<&mut PermissionU8>, n: u8) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
(<u8>::MIN as int) <= old(perm).view().value + n,
old(perm).view().value + n <= (<u8>::MAX as int),
ensures
equal(old(perm).view().value, ret),
perm.view().patomic == old(perm).view().patomic,
perm.view().value == old(perm).view().value + n,
Source

pub exec fn fetch_sub(&self, Tracked(perm): Tracked<&mut PermissionU8>, n: u8) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
(<u8>::MIN as int) <= old(perm).view().value - n,
old(perm).view().value - n <= <u8>::MAX as int,
ensures
equal(old(perm).view().value, ret),
perm.view().patomic == old(perm).view().patomic,
perm.view().value == old(perm).view().value - n,
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pub exec fn fetch_and(&self, Tracked(perm): Tracked<&mut PermissionU8>, n: u8) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(old(perm).view().value, ret),
perm.view().patomic == old(perm).view().patomic,
perm.view().value == (old(perm).view().value & n),
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pub exec fn fetch_or(&self, Tracked(perm): Tracked<&mut PermissionU8>, n: u8) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(old(perm).view().value, ret),
perm.view().patomic == old(perm).view().patomic,
perm.view().value == (old(perm).view().value | n),
Source

pub exec fn fetch_xor(&self, Tracked(perm): Tracked<&mut PermissionU8>, n: u8) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(old(perm).view().value, ret),
perm.view().patomic == old(perm).view().patomic,
perm.view().value == (old(perm).view().value ^ n),
Source

pub exec fn fetch_nand( &self, verus_tmp_perm: Tracked<&mut PermissionU8>, n: u8, ) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(old(perm).view().value, ret),
perm.view().patomic == old(perm).view().patomic,
perm.view().value == !(old(perm).view().value & n),
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pub exec fn fetch_max(&self, Tracked(perm): Tracked<&mut PermissionU8>, n: u8) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(old(perm).view().value, ret),
perm.view().patomic == old(perm).view().patomic,
perm.view().value
    == (if old(perm).view().value > n { old(perm).view().value } else { n }),
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pub exec fn fetch_min(&self, Tracked(perm): Tracked<&mut PermissionU8>, n: u8) -> ret : u8

requires
equal(self.id(), old(perm).view().patomic),
ensures
equal(old(perm).view().value, ret),
perm.view().patomic == old(perm).view().patomic,
perm.view().value
    == (if old(perm).view().value < n { old(perm).view().value } else { n }),

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