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/*
*
* Copyright (c) 2020 Project CHIP Authors
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file
* Provides implementations of the CHIP System Layer platform
* time/clock functions based on the Zephyr tick counter.
*/
/* this file behaves like a config.h, comes first */
#include <platform/internal/CHIPDeviceLayerInternal.h>
#include <system/SystemError.h>
#include <zephyr.h>
#if !CHIP_SYSTEM_CONFIG_USE_POSIX_TIME_FUNCTS
namespace chip {
namespace System {
namespace Clock {
namespace Internal {
ClockImpl gClockImpl;
} // namespace Internal
namespace {
constexpr Microseconds64 kUnknownRealTime = Seconds64::zero();
// Unix epoch time of boot event
Microseconds64 gBootRealTime = kUnknownRealTime;
} // namespace
Microseconds64 ClockImpl::GetMonotonicMicroseconds64()
{
return Microseconds64(k_ticks_to_us_floor64(k_uptime_ticks()));
}
Milliseconds64 ClockImpl::GetMonotonicMilliseconds64()
{
return Milliseconds64(k_uptime_get());
}
CHIP_ERROR ClockImpl::GetClock_RealTime(Microseconds64 & aCurTime)
{
// The real time can be configured by an application if it has access to a reliable time source.
// Otherwise, just return an error so that Matter stack can fallback to Last Known UTC Time.
ReturnErrorCodeIf(gBootRealTime == kUnknownRealTime, CHIP_ERROR_INCORRECT_STATE);
aCurTime = gBootRealTime + GetMonotonicMicroseconds64();
return CHIP_NO_ERROR;
}
CHIP_ERROR ClockImpl::GetClock_RealTimeMS(Milliseconds64 & aCurTime)
{
Microseconds64 curTimeUs;
ReturnErrorOnFailure(GetClock_RealTime(curTimeUs));
aCurTime = std::chrono::duration_cast<Milliseconds64>(curTimeUs);
return CHIP_NO_ERROR;
}
CHIP_ERROR ClockImpl::SetClock_RealTime(Microseconds64 aNewCurTime)
{
gBootRealTime = aNewCurTime - GetMonotonicMicroseconds64();
return CHIP_NO_ERROR;
}
} // namespace Clock
} // namespace System
} // namespace chip
#endif // !CHIP_SYSTEM_CONFIG_USE_POSIX_TIME_FUNCTS