Don't pause the cert refresh timers if the host goes to hibernation

dnscrypt-proxy/proxy.go

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"github.com/jedisct1/dlog"
+	clocksmith "github.com/jedisct1/go-clocksmith"
 	"github.com/pquerna/cachecontrol/cacheobject"
 	"golang.org/x/crypto/curve25519"
 )
@@ -100,7 +101,7 @@ func (proxy *Proxy) StartProxy() {
 			if proxy.serversInfo.liveServers() == 0 {
 				delay = proxy.certRefreshDelayAfterFailure
 			}
-			time.Sleep(delay)
+			clocksmith.Sleep(delay)
 			proxy.serversInfo.refresh(proxy)
 		}
 	}()
@@ -121,7 +122,7 @@ func (proxy *Proxy) prefetcher(urlsToPrefetch *[]URLToPrefetch) {
 					}
 				}
 			}
-			time.Sleep(60 * time.Second)
+			clocksmith.Sleep(60 * time.Second)
 		}
 	}()
 }

vendor/github.com/jedisct1/go-clocksmith/.gitignore

@@ -0,0 +1,14 @@
+# Binaries for programs and plugins
+*.exe
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
+.glide/

vendor/github.com/jedisct1/go-clocksmith/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Frank Denis
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/jedisct1/go-clocksmith/README.md

@@ -0,0 +1,4 @@
+# clocksmith
+
+A sleep-aware sleep() function, that doesn't pause (for too long) if
+the system goes to hibernation.

vendor/github.com/jedisct1/go-clocksmith/clocksmith.go

@@ -0,0 +1,31 @@
+package clocksmith
+
+import "time"
+
+const (
+	// DefaultGranularity - Maximum duration of actual time.Sleep() calls
+	DefaultGranularity = 10 * time.Second
+)
+
+// SleepWithGranularity - sleeps for the given amount of time, with the given granularity;
+// doesn't pause if the system goes to hibernation
+func SleepWithGranularity(duration time.Duration, granularity time.Duration) {
+	if duration <= granularity {
+		time.Sleep(duration)
+		return
+	}
+	now := time.Now()
+	for {
+		time.Sleep(granularity)
+		if elapsed := time.Since(now); elapsed > duration-granularity {
+			time.Sleep(duration - elapsed)
+			break
+		}
+	}
+}
+
+// Sleep - sleeps for the given amount of time, with the default granularity;
+// doesn't pause if the system goes to hibernation
+func Sleep(duration time.Duration) {
+	SleepWithGranularity(duration, DefaultGranularity)
+}