Darwin: add support for GetClock_RealTimeMS (#17668)

src/platform/Darwin/BUILD.gn

@@ -65,6 +65,7 @@ static_library("Darwin") {
     "PosixConfig.cpp",
     "PosixConfig.h",
     "SystemPlatformConfig.h",
+    "SystemTimeSupport.cpp",
   ]
 
   deps = [

src/platform/Darwin/SystemPlatformConfig.h

@@ -37,7 +37,7 @@ struct ChipDeviceEvent;
 #define CHIP_SYSTEM_CONFIG_POSIX_LOCKING 0
 #define CHIP_SYSTEM_CONFIG_FREERTOS_LOCKING 0
 #define CHIP_SYSTEM_CONFIG_NO_LOCKING 1
-#define CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_TIME 0
+#define CHIP_SYSTEM_CONFIG_PLATFORM_PROVIDES_TIME 1
 #define CHIP_SYSTEM_CONFIG_USE_POSIX_TIME_FUNCTS 1
 #define CHIP_SYSTEM_CONFIG_POOL_USE_HEAP 1
 

src/platform/Darwin/SystemTimeSupport.cpp

@@ -0,0 +1,118 @@
+/*
+ *
+ *    Copyright (c) 2020 Project CHIP Authors
+ *    Copyright (c) 2018 Nest Labs, Inc.
+ *    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 that are suitable for use on the Darwin platform.
+ */
+
+#include <platform/internal/CHIPDeviceLayerInternal.h>
+
+#include <lib/support/TimeUtils.h>
+#include <lib/support/logging/CHIPLogging.h>
+
+#include <chrono>
+#include <errno.h>
+#include <inttypes.h>
+#include <sys/time.h>
+
+namespace chip {
+namespace System {
+namespace Clock {
+
+namespace Internal {
+ClockImpl gClockImpl;
+} // namespace Internal
+
+Microseconds64 ClockImpl::GetMonotonicMicroseconds64()
+{
+    return std::chrono::duration_cast<Microseconds64>(std::chrono::steady_clock::now().time_since_epoch());
+}
+
+Milliseconds64 ClockImpl::GetMonotonicMilliseconds64()
+{
+    return std::chrono::duration_cast<Milliseconds64>(std::chrono::steady_clock::now().time_since_epoch());
+}
+
+CHIP_ERROR ClockImpl::GetClock_RealTime(Clock::Microseconds64 & aCurTime)
+{
+    struct timeval tv;
+    if (gettimeofday(&tv, nullptr) != 0)
+    {
+        return CHIP_ERROR_POSIX(errno);
+    }
+    if (tv.tv_sec < CHIP_SYSTEM_CONFIG_VALID_REAL_TIME_THRESHOLD)
+    {
+        return CHIP_ERROR_REAL_TIME_NOT_SYNCED;
+    }
+    if (tv.tv_usec < 0)
+    {
+        return CHIP_ERROR_REAL_TIME_NOT_SYNCED;
+    }
+    static_assert(CHIP_SYSTEM_CONFIG_VALID_REAL_TIME_THRESHOLD >= 0, "We might be letting through negative tv_sec values!");
+    aCurTime = Clock::Microseconds64((static_cast<uint64_t>(tv.tv_sec) * UINT64_C(1000000)) + static_cast<uint64_t>(tv.tv_usec));
+    return CHIP_NO_ERROR;
+}
+
+CHIP_ERROR ClockImpl::GetClock_RealTimeMS(Clock::Milliseconds64 & aCurTime)
+{
+    struct timeval tv;
+    if (gettimeofday(&tv, nullptr) != 0)
+    {
+        return CHIP_ERROR_POSIX(errno);
+    }
+    if (tv.tv_sec < CHIP_SYSTEM_CONFIG_VALID_REAL_TIME_THRESHOLD)
+    {
+        return CHIP_ERROR_REAL_TIME_NOT_SYNCED;
+    }
+    if (tv.tv_usec < 0)
+    {
+        return CHIP_ERROR_REAL_TIME_NOT_SYNCED;
+    }
+    static_assert(CHIP_SYSTEM_CONFIG_VALID_REAL_TIME_THRESHOLD >= 0, "We might be letting through negative tv_sec values!");
+    aCurTime =
+        Clock::Milliseconds64((static_cast<uint64_t>(tv.tv_sec) * UINT64_C(1000)) + (static_cast<uint64_t>(tv.tv_usec) / 1000));
+    return CHIP_NO_ERROR;
+}
+
+CHIP_ERROR ClockImpl::SetClock_RealTime(Clock::Microseconds64 aNewCurTime)
+{
+    struct timeval tv;
+    tv.tv_sec  = static_cast<time_t>(aNewCurTime.count() / UINT64_C(1000000));
+    tv.tv_usec = static_cast<long>(aNewCurTime.count() % UINT64_C(1000000));
+    if (settimeofday(&tv, nullptr) != 0)
+    {
+        return (errno == EPERM) ? CHIP_ERROR_ACCESS_DENIED : CHIP_ERROR_POSIX(errno);
+    }
+#if CHIP_PROGRESS_LOGGING
+    {
+        const time_t timep = tv.tv_sec;
+        struct tm calendar;
+        localtime_r(&timep, &calendar);
+        ChipLogProgress(DeviceLayer, "Real time clock set to %ld (%04d/%02d/%02d %02d:%02d:%02d UTC)", tv.tv_sec, calendar.tm_year,
+                        calendar.tm_mon, calendar.tm_mday, calendar.tm_hour, calendar.tm_min, calendar.tm_sec);
+    }
+#endif // CHIP_PROGRESS_LOGGING
+    return CHIP_NO_ERROR;
+}
+
+} // namespace Clock
+} // namespace System
+} // namespace chip