| // Copyright 2016 The Roughtime Authors. |
| // |
| // 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 monotime provides access to the system's monotonic clock. |
| package monotime |
| |
| import ( |
| "unsafe" |
| "time" |
| ) |
| |
| var _ = unsafe.Sizeof(0) |
| |
| //go:noescape |
| //go:linkname nanotime runtime.nanotime |
| func nanotime() int64 |
| |
| // Now returns the monotonic duration since an unspecified epoch. |
| func Now() time.Duration { |
| return time.Duration(nanotime()) * time.Nanosecond |
| } |