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830d5d1ac0
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>
50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
// Copyright 2020 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#include "pw_sync/binary_semaphore.h"
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using pw::chrono::SystemClock;
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extern "C" void pw_sync_BinarySemaphore_Release(
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pw_sync_BinarySemaphore* semaphore) {
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semaphore->release();
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}
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extern "C" void pw_sync_BinarySemaphore_Acquire(
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pw_sync_BinarySemaphore* semaphore) {
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semaphore->acquire();
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}
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extern "C" bool pw_sync_BinarySemaphore_TryAcquire(
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pw_sync_BinarySemaphore* semaphore) {
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return semaphore->try_acquire();
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}
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extern "C" bool pw_sync_BinarySemaphore_TryAcquireFor(
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pw_sync_BinarySemaphore* semaphore,
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pw_chrono_SystemClock_Duration for_at_least) {
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return semaphore->try_acquire_for(SystemClock::duration(for_at_least.ticks));
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}
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extern "C" bool pw_sync_BinarySemaphore_TryAcquireUntil(
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pw_sync_BinarySemaphore* semaphore,
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pw_chrono_SystemClock_TimePoint until_at_least) {
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return semaphore->try_acquire_until(SystemClock::time_point(
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SystemClock::duration(until_at_least.duration_since_epoch.ticks)));
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}
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extern "C" ptrdiff_t pw_sync_BinarySemaphore_Max(void) {
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return pw::sync::BinarySemaphore::max();
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}
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