Introduce a type representing a specific point in time. We could use
the Ktime type but C's ktime_t is used for both timestamp and
timedelta. To avoid confusion, introduce a new Instant type for
timestamp.
Rename Ktime to Instant and modify their methods for timestamp.
Implement the subtraction operator for Instant:
Delta = Instant A - Instant B
Reviewed-by: Boqun Feng <[email protected]>
Reviewed-by: Gary Guo <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Tested-by: Daniel Almeida <[email protected]>
Reviewed-by: Andreas Hindborg <[email protected]>
Signed-off-by: FUJITA Tomonori <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
Introduce a type representing a span of time. Define our own type
because `core::time::Duration` is large and could panic during
creation.
time::Ktime could be also used for time duration but timestamp and
timedelta are different so better to use a new type.
i64 is used instead of u64 to represent a span of time; some C drivers
uses negative Deltas and i64 is more compatible with Ktime using i64
too (e.g., ktime_[us|ms]_delta() APIs return i64 so we create Delta
object without type conversion.
i64 is used instead of bindings::ktime_t because when the ktime_t
type is used as timestamp, it represents values from 0 to
KTIME_MAX, which is different from Delta.
as_millis() method isn't used in this patchset. It's planned to be
used in Binder driver.
Reviewed-by: Andrew Lunn <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Reviewed-by: Gary Guo <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Tested-by: Daniel Almeida <[email protected]>
Reviewed-by: Andreas Hindborg <[email protected]>
Signed-off-by: FUJITA Tomonori <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
Add PartialEq/Eq/PartialOrd/Ord trait to Ktime so two Ktime instances
can be compared to determine whether a timeout is met or not.
Use the derive implements; we directly touch C's ktime_t rather than
using the C's accessors because it is more efficient and we already do
in the existing code (Ktime::sub).
Reviewed-by: Trevor Gross <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Reviewed-by: Gary Guo <[email protected]>
Reviewed-by: Fiona Behrens <[email protected]>
Tested-by: Daniel Almeida <[email protected]>
Reviewed-by: Andreas Hindborg <[email protected]>
Signed-off-by: FUJITA Tomonori <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>
Currently FFI integer types are defined in libcore. This commit creates
the `ffi` crate and asks bindgen to use that crate for FFI integer types
instead of `core::ffi`.
This commit is preparatory and no type changes are made in this commit
yet.
Signed-off-by: Gary Guo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ Added `rustdoc`, `rusttest` and KUnit tests support. Rebased on top of
`rust-next` (e.g. migrated more `core::ffi` cases). Reworded crate
docs slightly and formatted. - Miguel ]
Signed-off-by: Miguel Ojeda <[email protected]>
The definitions related to jiffies are at linux/jiffies.h, and the
definitions related to ktime_t are at linux/ktime.h, since
`kernel::time` provides the functionality dealing with jiffies and
ktime_t, it makes sense to add links to them from Rust's time module.
Signed-off-by: Boqun Feng <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Acked-by: Miguel Ojeda <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Defines type aliases and conversions for msecs and jiffies.
This is used by Rust Binder for process freezing. There, we want to
sleep until the freeze operation completes, but we want to be able to
abort the process freezing if it doesn't complete within some timeout.
The freeze timeout is supplied in msecs.
Note that we need to convert to jiffies in Binder. It is not enough to
introduce a variant of `CondVar::wait_timeout` that takes the timeout in
msecs because we need to be able to restart the sleep with the remaining
sleep duration if it is interrupted, and if the API takes msecs rather
than jiffies, then that would require a conversion roundtrip jiffies->
msecs->jiffies that is best avoided.
Suggested-by: Boqun Feng <[email protected]>
Reviewed-by: Boqun Feng <[email protected]>
Reviewed-by: Benno Lossin <[email protected]>
Reviewed-by: Martin Rodriguez Reboredo <[email protected]>
Reviewed-by: Tiago Lam <[email protected]>
Signed-off-by: Alice Ryhl <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>
FUJITA Tomonori