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/*
* Copyright (C) 2023 Square, Inc.
*
* 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.
*/
package okio
import kotlin.wasm.unsafe.UnsafeWasmMemoryApi
import kotlin.wasm.unsafe.withScopedMemoryAllocator
import okio.internal.preview1.clock_time_get
import okio.internal.preview1.clockid_realtime
object WasiClock : Clock {
@OptIn(UnsafeWasmMemoryApi::class)
override fun now(): Instant {
withScopedMemoryAllocator { allocator ->
val returnPointer = allocator.allocate(8) // timestamp is u64.
val errno = clock_time_get(
id = clockid_realtime,
precision = 1_000_000_000L, // 1-second precision.
returnPointer.address.toInt(),
)
if (errno != 0) throw IllegalStateException("failed to get now: $errno")
val nanos = returnPointer.loadLong()
return Instant(epochMilliseconds = nanos / 1_000_000L)
}
}
}
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