CTest: introduce cmDuration

This commit introduces cmDuration as a typedef for
std::chrono::duration<double, std::ratio<1>>. It is less verbose and
provides for a point to put future common functionality for durations.

No functional change intended.

19 files changed, 111 insertions, 109 deletions

diff --git a/Source/CTest/cmCTestBuildAndTestHandler.cxx b/Source/CTest/cmCTestBuildAndTestHandler.cxx
index 85d98d0882..3383c9d48c 100644
--- a/Source/CTest/cmCTestBuildAndTestHandler.cxx
+++ b/Source/CTest/cmCTestBuildAndTestHandler.cxx
@@ -19,7 +19,7 @@ cmCTestBuildAndTestHandler::cmCTestBuildAndTestHandler()
   this->BuildTwoConfig = false;
   this->BuildNoClean = false;
   this->BuildNoCMake = false;
-  this->Timeout = std::chrono::duration<double>::zero();
+  this->Timeout = cmDuration::zero();
 }
 
 void cmCTestBuildAndTestHandler::Initialize()
@@ -224,8 +224,8 @@ int cmCTestBuildAndTestHandler::RunCMakeAndTest(std::string* outstring)
     this->BuildTargets.push_back("");
   }
   for (std::string const& tar : this->BuildTargets) {
-    std::chrono::duration<double> remainingTime = std::chrono::seconds(0);
-    if (this->Timeout > std::chrono::duration<double>::zero()) {
+    cmDuration remainingTime = std::chrono::seconds(0);
+    if (this->Timeout > cmDuration::zero()) {
       remainingTime =
         this->Timeout - (std::chrono::steady_clock::now() - clock_start);
       if (remainingTime <= std::chrono::seconds(0)) {
@@ -323,8 +323,8 @@ int cmCTestBuildAndTestHandler::RunCMakeAndTest(std::string* outstring)
   out << "\n";
 
   // how much time is remaining
-  std::chrono::duration<double> remainingTime = std::chrono::seconds(0);
-  if (this->Timeout > std::chrono::duration<double>::zero()) {
+  cmDuration remainingTime = std::chrono::seconds(0);
+  if (this->Timeout > cmDuration::zero()) {
     remainingTime =
       this->Timeout - (std::chrono::steady_clock::now() - clock_start);
     if (remainingTime <= std::chrono::seconds(0)) {
@@ -395,7 +395,7 @@ int cmCTestBuildAndTestHandler::ProcessCommandLineArguments(
   }
   if (currentArg.find("--test-timeout", 0) == 0 && idx < allArgs.size() - 1) {
     idx++;
-    this->Timeout = std::chrono::duration<double>(atof(allArgs[idx].c_str()));
+    this->Timeout = cmDuration(atof(allArgs[idx].c_str()));
   }
   if (currentArg == "--build-generator" && idx < allArgs.size() - 1) {
     idx++;
diff --git a/Source/CTest/cmCTestBuildAndTestHandler.h b/Source/CTest/cmCTestBuildAndTestHandler.h
index f8a9ed7fd3..5e6d0aad29 100644
--- a/Source/CTest/cmCTestBuildAndTestHandler.h
+++ b/Source/CTest/cmCTestBuildAndTestHandler.h
@@ -6,8 +6,8 @@
 #include "cmConfigure.h" // IWYU pragma: keep
 
 #include "cmCTestGenericHandler.h"
+#include "cmDuration.h"
 
-#include <chrono>
 #include <sstream>
 #include <stddef.h>
 #include <string>
@@ -68,7 +68,7 @@ protected:
   std::vector<std::string> TestCommandArgs;
   std::vector<std::string> BuildTargets;
   bool BuildNoCMake;
-  std::chrono::duration<double> Timeout;
+  cmDuration Timeout;
 };
 
 #endif
diff --git a/Source/CTest/cmCTestBuildHandler.cxx b/Source/CTest/cmCTestBuildHandler.cxx
index ef4d3c68bc..2acf5e8b26 100644
--- a/Source/CTest/cmCTestBuildHandler.cxx
+++ b/Source/CTest/cmCTestBuildHandler.cxx
@@ -4,6 +4,7 @@
 
 #include "cmAlgorithms.h"
 #include "cmCTest.h"
+#include "cmDuration.h"
 #include "cmFileTimeComparison.h"
 #include "cmGeneratedFileStream.h"
 #include "cmMakefile.h"
@@ -633,8 +634,8 @@ void cmCTestBuildHandler::GenerateXMLLogScraped(cmXMLWriter& xml)
   }
 }
 
-void cmCTestBuildHandler::GenerateXMLFooter(
-  cmXMLWriter& xml, std::chrono::duration<double> elapsed_build_time)
+void cmCTestBuildHandler::GenerateXMLFooter(cmXMLWriter& xml,
+                                            cmDuration elapsed_build_time)
 {
   xml.StartElement("Log");
   xml.Attribute("Encoding", "base64");
diff --git a/Source/CTest/cmCTestBuildHandler.h b/Source/CTest/cmCTestBuildHandler.h
index d1b9b2e8ea..a9b121b24e 100644
--- a/Source/CTest/cmCTestBuildHandler.h
+++ b/Source/CTest/cmCTestBuildHandler.h
@@ -7,6 +7,7 @@
 
 #include "cmCTestGenericHandler.h"
 
+#include "cmDuration.h"
 #include "cmProcessOutput.h"
 #include "cmsys/RegularExpression.hxx"
 #include <chrono>
@@ -87,8 +88,7 @@ private:
   void GenerateXMLHeader(cmXMLWriter& xml);
   void GenerateXMLLaunched(cmXMLWriter& xml);
   void GenerateXMLLogScraped(cmXMLWriter& xml);
-  void GenerateXMLFooter(cmXMLWriter& xml,
-                         std::chrono::duration<double> elapsed_build_time);
+  void GenerateXMLFooter(cmXMLWriter& xml, cmDuration elapsed_build_time);
   bool IsLaunchedErrorFile(const char* fname);
   bool IsLaunchedWarningFile(const char* fname);
 
diff --git a/Source/CTest/cmCTestConfigureHandler.cxx b/Source/CTest/cmCTestConfigureHandler.cxx
index eb067e5936..821a94a007 100644
--- a/Source/CTest/cmCTestConfigureHandler.cxx
+++ b/Source/CTest/cmCTestConfigureHandler.cxx
@@ -3,6 +3,7 @@
 #include "cmCTestConfigureHandler.h"
 
 #include "cmCTest.h"
+#include "cmDuration.h"
 #include "cmGeneratedFileStream.h"
 #include "cmXMLWriter.h"
 
@@ -62,9 +63,9 @@ int cmCTestConfigureHandler::ProcessHandler()
     cmCTestOptionalLog(this->CTest, HANDLER_VERBOSE_OUTPUT,
                        "Configure with command: " << cCommand << std::endl,
                        this->Quiet);
-    res = this->CTest->RunMakeCommand(
-      cCommand.c_str(), output, &retVal, buildDirectory.c_str(),
-      std::chrono::duration<double>::zero(), ofs);
+    res = this->CTest->RunMakeCommand(cCommand.c_str(), output, &retVal,
+                                      buildDirectory.c_str(),
+                                      cmDuration::zero(), ofs);
 
     if (ofs) {
       ofs.close();
diff --git a/Source/CTest/cmCTestCoverageHandler.cxx b/Source/CTest/cmCTestCoverageHandler.cxx
index 2a9fd72392..856421fecd 100644
--- a/Source/CTest/cmCTestCoverageHandler.cxx
+++ b/Source/CTest/cmCTestCoverageHandler.cxx
@@ -3,6 +3,7 @@
 #include "cmCTestCoverageHandler.h"
 
 #include "cmCTest.h"
+#include "cmDuration.h"
 #include "cmGeneratedFileStream.h"
 #include "cmParseBlanketJSCoverage.h"
 #include "cmParseCacheCoverage.h"
@@ -40,7 +41,7 @@ public:
   {
     this->Process = cmsysProcess_New();
     this->PipeState = -1;
-    this->TimeOut = std::chrono::duration<double>(-1);
+    this->TimeOut = cmDuration(-1);
   }
   ~cmCTestRunProcess()
   {
@@ -64,7 +65,7 @@ public:
     }
   }
   void SetWorkingDirectory(const char* dir) { this->WorkingDirectory = dir; }
-  void SetTimeout(std::chrono::duration<double> t) { this->TimeOut = t; }
+  void SetTimeout(cmDuration t) { this->TimeOut = t; }
   bool StartProcess()
   {
     std::vector<const char*> args;
@@ -79,7 +80,7 @@ public:
     }
 
     cmsysProcess_SetOption(this->Process, cmsysProcess_Option_HideWindow, 1);
-    if (this->TimeOut >= std::chrono::duration<double>::zero()) {
+    if (this->TimeOut >= cmDuration::zero()) {
       cmsysProcess_SetTimeout(this->Process, this->TimeOut.count());
     }
     cmsysProcess_Execute(this->Process);
@@ -108,7 +109,7 @@ private:
   cmsysProcess* Process;
   std::vector<std::string> CommandLineStrings;
   std::string WorkingDirectory;
-  std::chrono::duration<double> TimeOut;
+  cmDuration TimeOut;
 };
 
 cmCTestCoverageHandler::cmCTestCoverageHandler()
@@ -1022,9 +1023,9 @@ int cmCTestCoverageHandler::HandleGCovCoverage(
     int retVal = 0;
     *cont->OFS << "* Run coverage for: " << fileDir << std::endl;
     *cont->OFS << "  Command: " << command << std::endl;
-    int res = this->CTest->RunCommand(
-      covargs, &output, &errors, &retVal, tempDir.c_str(),
-      std::chrono::duration<double>::zero() /*this->TimeOut*/);
+    int res = this->CTest->RunCommand(covargs, &output, &errors, &retVal,
+                                      tempDir.c_str(),
+                                      cmDuration::zero() /*this->TimeOut*/);
 
     *cont->OFS << "  Output: " << output << std::endl;
     *cont->OFS << "  Errors: " << errors << std::endl;
@@ -1387,9 +1388,9 @@ int cmCTestCoverageHandler::HandleLCovCoverage(
     int retVal = 0;
     *cont->OFS << "* Run coverage for: " << fileDir << std::endl;
     *cont->OFS << "  Command: " << command << std::endl;
-    int res = this->CTest->RunCommand(
-      covargs, &output, &errors, &retVal, fileDir.c_str(),
-      std::chrono::duration<double>::zero() /*this->TimeOut*/);
+    int res = this->CTest->RunCommand(covargs, &output, &errors, &retVal,
+                                      fileDir.c_str(),
+                                      cmDuration::zero() /*this->TimeOut*/);
 
     *cont->OFS << "  Output: " << output << std::endl;
     *cont->OFS << "  Errors: " << errors << std::endl;
diff --git a/Source/CTest/cmCTestRunTest.cxx b/Source/CTest/cmCTestRunTest.cxx
index baf894e29c..a5ec93de06 100644
--- a/Source/CTest/cmCTestRunTest.cxx
+++ b/Source/CTest/cmCTestRunTest.cxx
@@ -25,7 +25,7 @@ cmCTestRunTest::cmCTestRunTest(cmCTestMultiProcessHandler& multiHandler)
 {
   this->CTest = multiHandler.CTest;
   this->TestHandler = multiHandler.TestHandler;
-  this->TestResult.ExecutionTime = std::chrono::duration<double>::zero();
+  this->TestResult.ExecutionTime = cmDuration::zero();
   this->TestResult.ReturnValue = 0;
   this->TestResult.Status = cmCTestTestHandler::NOT_RUN;
   this->TestResult.TestCount = 0;
@@ -400,7 +400,7 @@ bool cmCTestRunTest::StartTest(size_t total)
   // Return immediately if test is disabled
   if (this->TestProperties->Disabled) {
     this->TestResult.Properties = this->TestProperties;
-    this->TestResult.ExecutionTime = std::chrono::duration<double>::zero();
+    this->TestResult.ExecutionTime = cmDuration::zero();
     this->TestResult.CompressOutput = false;
     this->TestResult.ReturnValue = -1;
     this->TestResult.CompletionStatus = "Disabled";
@@ -415,7 +415,7 @@ bool cmCTestRunTest::StartTest(size_t total)
   }
 
   this->TestResult.Properties = this->TestProperties;
-  this->TestResult.ExecutionTime = std::chrono::duration<double>::zero();
+  this->TestResult.ExecutionTime = cmDuration::zero();
   this->TestResult.CompressOutput = false;
   this->TestResult.ReturnValue = -1;
   this->TestResult.CompletionStatus = "Failed to start";
@@ -590,8 +590,7 @@ void cmCTestRunTest::DartProcessing()
   }
 }
 
-bool cmCTestRunTest::ForkProcess(std::chrono::duration<double> testTimeOut,
-                                 bool explicitTimeout,
+bool cmCTestRunTest::ForkProcess(cmDuration testTimeOut, bool explicitTimeout,
                                  std::vector<std::string>* environment)
 {
   this->TestProcess = cm::make_unique<cmProcess>(*this);
@@ -602,27 +601,25 @@ bool cmCTestRunTest::ForkProcess(std::chrono::duration<double> testTimeOut,
   this->TestProcess->SetCommandArguments(this->Arguments);
 
   // determine how much time we have
-  std::chrono::duration<double> timeout =
-    this->CTest->GetRemainingTimeAllowed();
+  cmDuration timeout = this->CTest->GetRemainingTimeAllowed();
   if (timeout != cmCTest::MaxDuration()) {
     timeout -= std::chrono::minutes(2);
   }
-  if (this->CTest->GetTimeOut() > std::chrono::duration<double>::zero() &&
+  if (this->CTest->GetTimeOut() > cmDuration::zero() &&
       this->CTest->GetTimeOut() < timeout) {
     timeout = this->CTest->GetTimeOut();
   }
-  if (testTimeOut > std::chrono::duration<double>::zero() &&
+  if (testTimeOut > cmDuration::zero() &&
       testTimeOut < this->CTest->GetRemainingTimeAllowed()) {
     timeout = testTimeOut;
   }
   // always have at least 1 second if we got to here
-  if (timeout <= std::chrono::duration<double>::zero()) {
+  if (timeout <= cmDuration::zero()) {
     timeout = std::chrono::seconds(1);
   }
   // handle timeout explicitly set to 0
-  if (testTimeOut == std::chrono::duration<double>::zero() &&
-      explicitTimeout) {
-    timeout = std::chrono::duration<double>::zero();
+  if (testTimeOut == cmDuration::zero() && explicitTimeout) {
+    timeout = cmDuration::zero();
   }
   cmCTestOptionalLog(
     this->CTest, HANDLER_VERBOSE_OUTPUT, this->Index
diff --git a/Source/CTest/cmCTestRunTest.h b/Source/CTest/cmCTestRunTest.h
index fbc202f41c..4d573572f7 100644
--- a/Source/CTest/cmCTestRunTest.h
+++ b/Source/CTest/cmCTestRunTest.h
@@ -5,13 +5,13 @@
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
-#include <chrono>
 #include <set>
 #include <stddef.h>
 #include <string>
 #include <vector>
 
 #include "cmCTestTestHandler.h"
+#include "cmDuration.h"
 #include "cmProcess.h" // IWYU pragma: keep (for unique_ptr)
 
 class cmCTest;
@@ -82,8 +82,7 @@ private:
   bool NeedsToRerun();
   void DartProcessing();
   void ExeNotFound(std::string exe);
-  bool ForkProcess(std::chrono::duration<double> testTimeOut,
-                   bool explicitTimeout,
+  bool ForkProcess(cmDuration testTimeOut, bool explicitTimeout,
                    std::vector<std::string>* environment);
   void WriteLogOutputTop(size_t completed, size_t total);
   // Run post processing of the process output for MemCheck
diff --git a/Source/CTest/cmCTestScriptHandler.cxx b/Source/CTest/cmCTestScriptHandler.cxx
index 716ea1035b..d5faeb5cb8 100644
--- a/Source/CTest/cmCTestScriptHandler.cxx
+++ b/Source/CTest/cmCTestScriptHandler.cxx
@@ -558,8 +558,8 @@ int cmCTestScriptHandler::RunCurrentScript()
   // for a continuous, do we ned to run it more than once?
   if (this->ContinuousDuration >= 0) {
     this->UpdateElapsedTime();
-    auto ending_time = std::chrono::steady_clock::now() +
-      std::chrono::duration<double>(this->ContinuousDuration);
+    auto ending_time =
+      std::chrono::steady_clock::now() + cmDuration(this->ContinuousDuration);
     if (this->EmptyBinDirOnce) {
       this->EmptyBinDir = true;
     }
@@ -567,8 +567,7 @@ int cmCTestScriptHandler::RunCurrentScript()
       auto startOfInterval = std::chrono::steady_clock::now();
       result = this->RunConfigurationDashboard();
       auto interval = std::chrono::steady_clock::now() - startOfInterval;
-      auto minimumInterval =
-        std::chrono::duration<double>(this->MinimumInterval);
+      auto minimumInterval = cmDuration(this->MinimumInterval);
       if (interval < minimumInterval) {
         auto sleepTime = std::chrono::duration_cast<std::chrono::seconds>(
                            minimumInterval - interval)
@@ -960,7 +959,7 @@ bool cmCTestScriptHandler::TryToRemoveBinaryDirectoryOnce(
   return cmSystemTools::RemoveADirectory(directoryPath);
 }
 
-std::chrono::duration<double> cmCTestScriptHandler::GetRemainingTimeAllowed()
+cmDuration cmCTestScriptHandler::GetRemainingTimeAllowed()
 {
   if (!this->Makefile) {
     return cmCTest::MaxDuration();
@@ -972,9 +971,9 @@ std::chrono::duration<double> cmCTestScriptHandler::GetRemainingTimeAllowed()
     return cmCTest::MaxDuration();
   }
 
-  auto timelimit = std::chrono::duration<double>(atof(timelimitS));
+  auto timelimit = cmDuration(atof(timelimitS));
 
-  auto duration = std::chrono::duration_cast<std::chrono::duration<double>>(
+  auto duration = std::chrono::duration_cast<cmDuration>(
     std::chrono::steady_clock::now() - this->ScriptStartTime);
   return (timelimit - duration);
 }
diff --git a/Source/CTest/cmCTestScriptHandler.h b/Source/CTest/cmCTestScriptHandler.h
index 9b7fa75955..ea5d5af776 100644
--- a/Source/CTest/cmCTestScriptHandler.h
+++ b/Source/CTest/cmCTestScriptHandler.h
@@ -6,6 +6,7 @@
 #include "cmConfigure.h" // IWYU pragma: keep
 
 #include "cmCTestGenericHandler.h"
+#include "cmDuration.h"
 
 #include <chrono>
 #include <string>
@@ -96,7 +97,7 @@ public:
    * seconds if the user has set the variable CTEST_TIME_LIMIT. If that has
    * not been set it returns a very large value.
    */
-  std::chrono::duration<double> GetRemainingTimeAllowed();
+  cmDuration GetRemainingTimeAllowed();
 
   cmCTestScriptHandler();
   ~cmCTestScriptHandler() override;
diff --git a/Source/CTest/cmCTestSubmitHandler.cxx b/Source/CTest/cmCTestSubmitHandler.cxx
index 86fee7af3a..1ce2b6fe83 100644
--- a/Source/CTest/cmCTestSubmitHandler.cxx
+++ b/Source/CTest/cmCTestSubmitHandler.cxx
@@ -16,6 +16,7 @@
 #include "cmCTestScriptHandler.h"
 #include "cmCryptoHash.h"
 #include "cmCurl.h"
+#include "cmDuration.h"
 #include "cmGeneratedFileStream.h"
 #include "cmProcessOutput.h"
 #include "cmState.h"
@@ -497,7 +498,7 @@ bool cmCTestSubmitHandler::SubmitUsingHTTP(const std::string& localprefix,
           ? ""
           : this->GetOption("RetryCount");
 
-        auto delay = std::chrono::duration<double>(
+        auto delay = cmDuration(
           retryDelay.empty()
             ? atoi(this->CTest->GetCTestConfiguration("CTestSubmitRetryDelay")
                      .c_str())
diff --git a/Source/CTest/cmCTestTestCommand.cxx b/Source/CTest/cmCTestTestCommand.cxx
index 232bd58028..daedf62556 100644
--- a/Source/CTest/cmCTestTestCommand.cxx
+++ b/Source/CTest/cmCTestTestCommand.cxx
@@ -4,6 +4,7 @@
 
 #include "cmCTest.h"
 #include "cmCTestGenericHandler.h"
+#include "cmDuration.h"
 #include "cmMakefile.h"
 #include "cmSystemTools.h"
 
@@ -37,12 +38,12 @@ cmCTestGenericHandler* cmCTestTestCommand::InitializeHandler()
   const char* ctestTimeout =
     this->Makefile->GetDefinition("CTEST_TEST_TIMEOUT");
 
-  std::chrono::duration<double> timeout;
+  cmDuration timeout;
   if (ctestTimeout) {
-    timeout = std::chrono::duration<double>(atof(ctestTimeout));
+    timeout = cmDuration(atof(ctestTimeout));
   } else {
     timeout = this->CTest->GetTimeOut();
-    if (timeout <= std::chrono::duration<double>::zero()) {
+    if (timeout <= cmDuration::zero()) {
       // By default use timeout of 10 minutes
       timeout = std::chrono::minutes(10);
     }
diff --git a/Source/CTest/cmCTestTestHandler.cxx b/Source/CTest/cmCTestTestHandler.cxx
index 4c7cefb5be..ce7c1945c0 100644
--- a/Source/CTest/cmCTestTestHandler.cxx
+++ b/Source/CTest/cmCTestTestHandler.cxx
@@ -21,6 +21,7 @@
 #include "cmCTest.h"
 #include "cmCTestMultiProcessHandler.h"
 #include "cmCommand.h"
+#include "cmDuration.h"
 #include "cmGeneratedFileStream.h"
 #include "cmGlobalGenerator.h"
 #include "cmMakefile.h"
@@ -346,7 +347,7 @@ void cmCTestTestHandler::Initialize()
 {
   this->Superclass::Initialize();
 
-  this->ElapsedTestingTime = std::chrono::duration<double>();
+  this->ElapsedTestingTime = cmDuration();
 
   this->TestResults.clear();
 
@@ -539,7 +540,7 @@ int cmCTestTestHandler::ProcessHandler()
       this->PrintLabelOrSubprojectSummary(false);
     }
     char realBuf[1024];
-    std::chrono::duration<double> durationInSecs = clock_finish - clock_start;
+    cmDuration durationInSecs = clock_finish - clock_start;
     sprintf(realBuf, "%6.2f sec", durationInSecs.count());
     cmCTestOptionalLog(this->CTest, HANDLER_OUTPUT,
                        "\nTotal Test time (real) = " << realBuf << "\n",
@@ -1235,9 +1236,8 @@ void cmCTestTestHandler::ProcessDirectory(std::vector<std::string>& passed,
       p.Cost = static_cast<float>(rand());
     }
 
-    if (p.Timeout == std::chrono::duration<double>::zero() &&
-        this->CTest->GetGlobalTimeout() !=
-          std::chrono::duration<double>::zero()) {
+    if (p.Timeout == cmDuration::zero() &&
+        this->CTest->GetGlobalTimeout() != cmDuration::zero()) {
       p.Timeout = this->CTest->GetGlobalTimeout();
     }
 
@@ -2140,7 +2140,7 @@ bool cmCTestTestHandler::SetTestsProperties(
             rt.FixturesRequired.insert(lval.begin(), lval.end());
           }
           if (key == "TIMEOUT") {
-            rt.Timeout = std::chrono::duration<double>(atof(val.c_str()));
+            rt.Timeout = cmDuration(atof(val.c_str()));
             rt.ExplicitTimeout = true;
           }
           if (key == "COST") {
@@ -2220,8 +2220,7 @@ bool cmCTestTestHandler::SetTestsProperties(
                          "TIMEOUT_AFTER_MATCH expects two arguments, found "
                            << propArgs.size() << std::endl);
             } else {
-              rt.AlternateTimeout =
-                std::chrono::duration<double>(atof(propArgs[0].c_str()));
+              rt.AlternateTimeout = cmDuration(atof(propArgs[0].c_str()));
               std::vector<std::string> lval;
               cmSystemTools::ExpandListArgument(propArgs[1], lval);
               for (std::string const& cr : lval) {
@@ -2339,7 +2338,7 @@ bool cmCTestTestHandler::AddTest(const std::vector<std::string>& args)
   test.WillFail = false;
   test.Disabled = false;
   test.RunSerial = false;
-  test.Timeout = std::chrono::duration<double>::zero();
+  test.Timeout = cmDuration::zero();
   test.ExplicitTimeout = false;
   test.Cost = 0;
   test.Processors = 1;
diff --git a/Source/CTest/cmCTestTestHandler.h b/Source/CTest/cmCTestTestHandler.h
index 4fb067a9e3..f4978b6770 100644
--- a/Source/CTest/cmCTestTestHandler.h
+++ b/Source/CTest/cmCTestTestHandler.h
@@ -6,6 +6,7 @@
 #include "cmConfigure.h" // IWYU pragma: keep
 
 #include "cmCTestGenericHandler.h"
+#include "cmDuration.h"
 
 #include "cmsys/RegularExpression.hxx"
 #include <chrono>
@@ -123,9 +124,9 @@ public:
     float Cost;
     int PreviousRuns;
     bool RunSerial;
-    std::chrono::duration<double> Timeout;
+    cmDuration Timeout;
     bool ExplicitTimeout;
-    std::chrono::duration<double> AlternateTimeout;
+    cmDuration AlternateTimeout;
     int Index;
     // Requested number of process slots
     int Processors;
@@ -146,7 +147,7 @@ public:
     std::string Path;
     std::string Reason;
     std::string FullCommandLine;
-    std::chrono::duration<double> ExecutionTime;
+    cmDuration ExecutionTime;
     int ReturnValue;
     int Status;
     std::string ExceptionStatus;
@@ -198,7 +199,7 @@ protected:
   //! Clean test output to specified length
   bool CleanTestOutput(std::string& output, size_t length);
 
-  std::chrono::duration<double> ElapsedTestingTime;
+  cmDuration ElapsedTestingTime;
 
   typedef std::vector<cmCTestTestResult> TestResultsVector;
   TestResultsVector TestResults;
diff --git a/Source/CTest/cmProcess.cxx b/Source/CTest/cmProcess.cxx
index e332a778cf..09ed0a9147 100644
--- a/Source/CTest/cmProcess.cxx
+++ b/Source/CTest/cmProcess.cxx
@@ -62,8 +62,8 @@ cmProcess::cmProcess(cmCTestRunTest& runner)
   : Runner(runner)
   , Conv(cmProcessOutput::UTF8, CM_PROCESS_BUF_SIZE)
 {
-  this->Timeout = std::chrono::duration<double>::zero();
-  this->TotalTime = std::chrono::duration<double>::zero();
+  this->Timeout = cmDuration::zero();
+  this->TotalTime = cmDuration::zero();
   this->ExitValue = 0;
   this->Id = 0;
   this->StartTime = std::chrono::steady_clock::time_point();
@@ -344,8 +344,8 @@ void cmProcess::OnExit(int64_t exit_status, int term_signal)
   // negative. If someone changed the system clock while the process was
   // running this may be even more. Make sure not to report a negative
   // duration here.
-  if (this->TotalTime <= std::chrono::duration<double>::zero()) {
-    this->TotalTime = std::chrono::duration<double>::zero();
+  if (this->TotalTime <= cmDuration::zero()) {
+    this->TotalTime = cmDuration::zero();
   }
 
   this->ProcessHandleClosed = true;
@@ -360,7 +360,7 @@ cmProcess::State cmProcess::GetProcessStatus()
   return this->ProcessState;
 }
 
-void cmProcess::ChangeTimeout(std::chrono::duration<double> t)
+void cmProcess::ChangeTimeout(cmDuration t)
 {
   this->Timeout = t;
   this->StartTimer();
diff --git a/Source/CTest/cmProcess.h b/Source/CTest/cmProcess.h
index 633be241b2..20e24b9d20 100644
--- a/Source/CTest/cmProcess.h
+++ b/Source/CTest/cmProcess.h
@@ -4,6 +4,7 @@
 #define cmProcess_h
 
 #include "cmConfigure.h" // IWYU pragma: keep
+#include "cmDuration.h"
 
 #include "cmProcessOutput.h"
 #include "cmUVHandlePtr.h"
@@ -31,8 +32,8 @@ public:
   void SetCommand(const char* command);
   void SetCommandArguments(std::vector<std::string> const& arg);
   void SetWorkingDirectory(const char* dir) { this->WorkingDirectory = dir; }
-  void SetTimeout(std::chrono::duration<double> t) { this->Timeout = t; }
-  void ChangeTimeout(std::chrono::duration<double> t);
+  void SetTimeout(cmDuration t) { this->Timeout = t; }
+  void ChangeTimeout(cmDuration t);
   void ResetStartTime();
   // Return true if the process starts
   bool StartProcess(uv_loop_t& loop);
@@ -53,7 +54,7 @@ public:
   int GetId() { return this->Id; }
   void SetId(int id) { this->Id = id; }
   int GetExitValue() { return this->ExitValue; }
-  std::chrono::duration<double> GetTotalTime() { return this->TotalTime; }
+  cmDuration GetTotalTime() { return this->TotalTime; }
 
   enum class Exception
   {
@@ -69,9 +70,9 @@ public:
   std::string GetExitExceptionString();
 
 private:
-  std::chrono::duration<double> Timeout;
+  cmDuration Timeout;
   std::chrono::steady_clock::time_point StartTime;
-  std::chrono::duration<double> TotalTime;
+  cmDuration TotalTime;
   bool ReadHandleClosed = false;
   bool ProcessHandleClosed = false;
 
diff --git a/Source/cmCTest.cxx b/Source/cmCTest.cxx
index fd7c5e819d..4be02ed950 100644
--- a/Source/cmCTest.cxx
+++ b/Source/cmCTest.cxx
@@ -277,8 +277,8 @@ cmCTest::cmCTest()
   this->TestModel = cmCTest::EXPERIMENTAL;
   this->MaxTestNameWidth = 30;
   this->InteractiveDebugMode = true;
-  this->TimeOut = std::chrono::duration<double>::zero();
-  this->GlobalTimeout = std::chrono::duration<double>::zero();
+  this->TimeOut = cmDuration::zero();
+  this->GlobalTimeout = cmDuration::zero();
   this->CompressXMLFiles = false;
   this->ScheduleType.clear();
   this->OutputLogFile = nullptr;
@@ -954,8 +954,7 @@ int cmCTest::GetTestModelFromString(const char* str)
 //######################################################################
 
 int cmCTest::RunMakeCommand(const char* command, std::string& output,
-                            int* retVal, const char* dir,
-                            std::chrono::duration<double> timeout,
+                            int* retVal, const char* dir, cmDuration timeout,
                             std::ostream& ofs, Encoding encoding)
 {
   // First generate the command and arguments
@@ -1071,28 +1070,26 @@ int cmCTest::RunMakeCommand(const char* command, std::string& output,
 //######################################################################
 
 int cmCTest::RunTest(std::vector<const char*> argv, std::string* output,
-                     int* retVal, std::ostream* log,
-                     std::chrono::duration<double> testTimeOut,
+                     int* retVal, std::ostream* log, cmDuration testTimeOut,
                      std::vector<std::string>* environment, Encoding encoding)
 {
   bool modifyEnv = (environment && !environment->empty());
 
   // determine how much time we have
-  std::chrono::duration<double> timeout = this->GetRemainingTimeAllowed();
+  cmDuration timeout = this->GetRemainingTimeAllowed();
   if (timeout != cmCTest::MaxDuration()) {
     timeout -= std::chrono::minutes(2);
   }
-  if (this->TimeOut > std::chrono::duration<double>::zero() &&
-      this->TimeOut < timeout) {
+  if (this->TimeOut > cmDuration::zero() && this->TimeOut < timeout) {
     timeout = this->TimeOut;
   }
-  if (testTimeOut > std::chrono::duration<double>::zero() &&
+  if (testTimeOut > cmDuration::zero() &&
       testTimeOut < this->GetRemainingTimeAllowed()) {
     timeout = testTimeOut;
   }
 
   // always have at least 1 second if we got to here
-  if (timeout <= std::chrono::duration<double>::zero()) {
+  if (timeout <= cmDuration::zero()) {
     timeout = std::chrono::seconds(1);
   }
   cmCTestLog(
@@ -1121,7 +1118,7 @@ int cmCTest::RunTest(std::vector<const char*> argv, std::string* output,
         // good place to check for it, and to add the arguments in
         if (strcmp(i, "--build-generator") == 0 &&
             timeout != cmCTest::MaxDuration() &&
-            timeout > std::chrono::duration<double>::zero()) {
+            timeout > cmDuration::zero()) {
           args.push_back("--test-timeout");
           std::ostringstream msg;
           msg << std::chrono::duration_cast<std::chrono::seconds>(timeout)
@@ -1772,7 +1769,7 @@ bool cmCTest::HandleCommandLineArguments(size_t& i,
 
   if (this->CheckArgument(arg, "--timeout") && i < args.size() - 1) {
     i++;
-    auto timeout = std::chrono::duration<double>(atof(args[i].c_str()));
+    auto timeout = cmDuration(atof(args[i].c_str()));
     this->GlobalTimeout = timeout;
   }
 
@@ -2575,8 +2572,7 @@ bool cmCTest::SetCTestConfigurationFromCMakeVariable(
 
 bool cmCTest::RunCommand(std::vector<std::string> const& args,
                          std::string* stdOut, std::string* stdErr, int* retVal,
-                         const char* dir,
-                         std::chrono::duration<double> timeout,
+                         const char* dir, cmDuration timeout,
                          Encoding encoding)
 {
   std::vector<const char*> argv;
@@ -2788,7 +2784,7 @@ void cmCTest::Log(int logType, const char* file, int line, const char* msg,
   }
 }
 
-std::chrono::duration<double> cmCTest::GetRemainingTimeAllowed()
+cmDuration cmCTest::GetRemainingTimeAllowed()
 {
   if (!this->GetHandler("script")) {
     return cmCTest::MaxDuration();
@@ -2800,9 +2796,9 @@ std::chrono::duration<double> cmCTest::GetRemainingTimeAllowed()
   return ch->GetRemainingTimeAllowed();
 }
 
-std::chrono::duration<double> cmCTest::MaxDuration()
+cmDuration cmCTest::MaxDuration()
 {
-  return std::chrono::duration<double>(1.0e7);
+  return cmDuration(1.0e7);
 }
 
 void cmCTest::OutputTestErrors(std::vector<char> const& process_output)
diff --git a/Source/cmCTest.h b/Source/cmCTest.h
index 61487f14d6..a4d9a86661 100644
--- a/Source/cmCTest.h
+++ b/Source/cmCTest.h
@@ -5,6 +5,7 @@
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
+#include "cmDuration.h"
 #include "cmProcessOutput.h"
 #include "cmsys/String.hxx"
 #include <chrono>
@@ -140,13 +141,10 @@ public:
 
   /** what is the configuraiton type, e.g. Debug, Release etc. */
   std::string const& GetConfigType();
-  std::chrono::duration<double> GetTimeOut() { return this->TimeOut; }
-  void SetTimeOut(std::chrono::duration<double> t) { this->TimeOut = t; }
+  cmDuration GetTimeOut() { return this->TimeOut; }
+  void SetTimeOut(cmDuration t) { this->TimeOut = t; }
 
-  std::chrono::duration<double> GetGlobalTimeout()
-  {
-    return this->GlobalTimeout;
-  }
+  cmDuration GetGlobalTimeout() { return this->GlobalTimeout; }
 
   /** how many test to run at the same time */
   int GetParallelLevel() { return this->ParallelLevel; }
@@ -206,9 +204,9 @@ public:
    * seconds if the user has set the variable CTEST_TIME_LIMIT. If that has
    * not been set it returns a very large duration.
    */
-  std::chrono::duration<double> GetRemainingTimeAllowed();
+  cmDuration GetRemainingTimeAllowed();
 
-  static std::chrono::duration<double> MaxDuration();
+  static cmDuration MaxDuration();
 
   /**
    * Open file in the output directory and set the stream
@@ -258,8 +256,7 @@ public:
   bool RunCommand(std::vector<std::string> const& args, std::string* stdOut,
                   std::string* stdErr, int* retVal = nullptr,
                   const char* dir = nullptr,
-                  std::chrono::duration<double> timeout =
-                    std::chrono::duration<double>::zero(),
+                  cmDuration timeout = cmDuration::zero(),
                   Encoding encoding = cmProcessOutput::Auto);
 
   /**
@@ -279,8 +276,7 @@ public:
    * and retVal is return value or exception.
    */
   int RunMakeCommand(const char* command, std::string& output, int* retVal,
-                     const char* dir, std::chrono::duration<double> timeout,
-                     std::ostream& ofs,
+                     const char* dir, cmDuration timeout, std::ostream& ofs,
                      Encoding encoding = cmProcessOutput::Auto);
 
   /** Return the current tag */
@@ -327,7 +323,7 @@ public:
    * environment variables are restored to their previous values.
    */
   int RunTest(std::vector<const char*> args, std::string* output, int* retVal,
-              std::ostream* logfile, std::chrono::duration<double> testTimeOut,
+              std::ostream* logfile, cmDuration testTimeOut,
               std::vector<std::string>* environment,
               Encoding encoding = cmProcessOutput::Auto);
 
@@ -508,9 +504,9 @@ private:
   int TestModel;
   std::string SpecificTrack;
 
-  std::chrono::duration<double> TimeOut;
+  cmDuration TimeOut;
 
-  std::chrono::duration<double> GlobalTimeout;
+  cmDuration GlobalTimeout;
 
   int MaxTestNameWidth;
 
diff --git a/Source/cmDuration.h b/Source/cmDuration.h
new file mode 100644
index 0000000000..5f73585208
--- /dev/null
+++ b/Source/cmDuration.h
@@ -0,0 +1,8 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#pragma once
+
+#include <chrono>
+#include <ratio>
+
+typedef std::chrono::duration<double, std::ratio<1>> cmDuration;