Adds the pw::chrono::SystemTimer facade with STL backend to
schedule callbacks at a specified time in the future.
Change-Id: I2d9f3fe52d214c1ec0ddc152d1450a414339f59e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/49342
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Keir Mierle <keir@google.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>
Pigweed-Auto-Submit: Ewout van Bekkum <ewout@google.com>
Migrates Pigweed off of SpinLock to use the new InterruptSpinLock
name.
Also updates some stale documentation regarding SystemClock backends
which use InterruptSpinLocks before C++ construction now that there
is a constexpr constructor, as it was already getting updated for
the rename.
Change-Id: Ie821b7c5c59f21a16bcc9bd9674c5df6a85e27b1
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/37561
Commit-Queue: Ewout van Bekkum <ewout@google.com>
Pigweed-Auto-Submit: Ewout van Bekkum <ewout@google.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>
Changes the SystemClock C Api to:
1) Use a pw_chrono_SystemClock_Duration struct instead of aliasing
an int64_t under pw_chrono_SystemClock_TickCount which could
accidentally permit direct tick usage.
2) Add PW_SYSTEM_CLOCK_{MS,S,MIN,H} and
PW_SYSTEM_CLOCK_{MS,S,MIN,H}_CEIL to permit C API users to
create durations which round up to the nearest tick for deadlines
and timeouts, mirroring std::chrono::ceil.
3) Add PW_SYSTEM_CLOCK_{MS,S,MIN,H}_FLOOR to permit C API users to
create durations which round down to the nearest tick for oddball
corner cases, mirroring std::chrono::floor.
4) In order to enable said macros, the system_clock_config.h backend
config was changed to require the clock period as a preprocessor
defines instead of a std::ratio<>.
5) Renames pw_chrono_SystemClock_TimeDelta to
pw_chrono_SystemClock_TimeElapsed to make the argument ordering
make more sense.
6) Changes existing std::chrono::duration_cast usage to
std::chrono::ceil and std::chrono:floor to set a good example
to be explicit on rounding.
7) Renames pw_chrono_SystemClock_TickCountsToNsTruncate accordingly to
pw_chrono_SystemClock_DurationToNsFloor.
Requires: pigweed-internal:9340
Change-Id: Ia628dceac53f964eda7c4aacd3d790b8b0e92207
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/31280
Commit-Queue: Ewout van Bekkum <ewout@google.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>
Adds the initial pw_chrono module to Pigweed with a facade for the
pw::chrono::SystemClock. In adition, the pw_chrono_stl module is
provided with the first STL based backend of said module by using
std::chrono::steady_clock.
Change-Id: Id29f4280aa399a81518f6d13183cf495b2ee72dc
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/23260
Reviewed-by: Ewout van Bekkum <ewout@google.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>
Reviewed-by: Keir Mierle <keir@google.com>
Commit-Queue: Ewout van Bekkum <ewout@google.com>
