Remove TimeValue usage from llvm/Support

Summary:
This is a follow-up to D25416. It removes all usages of TimeValue from
llvm/Support library (except for the actual TimeValue declaration), and replaces
them with appropriate usages of std::chrono. To facilitate this, I have added
small utility functions for converting time points and durations into appropriate
OS-specific types (FILETIME, struct timespec, ...).

Reviewers: zturner, mehdi_amini

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D25730

llvm-svn: 284966

1 files changed, 12 insertions, 22 deletions

diff --git a/llvm/lib/Support/Windows/Path.inc b/llvm/lib/Support/Windows/Path.inc
index fab6aeca54a..f7bc22ab2cf 100644
--- a/llvm/lib/Support/Windows/Path.inc
+++ b/llvm/lib/Support/Windows/Path.inc
@@ -164,24 +164,18 @@ ErrorOr<space_info> disk_space(const Twine &Path) {
   return SpaceInfo;
 }
 
-TimeValue file_status::getLastAccessedTime() const {
-  ULARGE_INTEGER UI;
-  UI.LowPart = LastAccessedTimeLow;
-  UI.HighPart = LastAccessedTimeHigh;
-
-  TimeValue Ret;
-  Ret.fromWin32Time(UI.QuadPart);
-  return Ret;
+TimePoint<> file_status::getLastAccessedTime() const {
+  FILETIME Time;
+  Time.dwLowDateTime = LastAccessedTimeLow;
+  Time.dwHighDateTime = LastAccessedTimeHigh;
+  return toTimePoint(Time);
 }
 
-TimeValue file_status::getLastModificationTime() const {
-  ULARGE_INTEGER UI;
-  UI.LowPart = LastWriteTimeLow;
-  UI.HighPart = LastWriteTimeHigh;
-
-  TimeValue Ret;
-  Ret.fromWin32Time(UI.QuadPart);
-  return Ret;
+TimePoint<> file_status::getLastModificationTime() const {
+  FILETIME Time;
+  Time.dwLowDateTime = LastWriteTimeLow;
+  Time.dwHighDateTime = LastWriteTimeHigh;
+  return toTimePoint(Time);
 }
 
 std::error_code current_path(SmallVectorImpl<char> &result) {
@@ -513,12 +507,8 @@ std::error_code status(int FD, file_status &Result) {
   return getStatus(FileHandle, Result);
 }
 
-std::error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
-  ULARGE_INTEGER UI;
-  UI.QuadPart = Time.toWin32Time();
-  FILETIME FT;
-  FT.dwLowDateTime = UI.LowPart;
-  FT.dwHighDateTime = UI.HighPart;
+std::error_code setLastModificationAndAccessTime(int FD, TimePoint<> Time) {
+  FILETIME FT = toFILETIME(Time);
   HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
   if (!SetFileTime(FileHandle, NULL, &FT, &FT))
     return mapWindowsError(::GetLastError());