Revert "Add Chrono.h - std::chrono support header"

This reverts commit r284590 as it fails on the mingw buildbot. I think I know the
fix, but I cannot test it right now. Will reapply when I verify it works ok.

This reverts r284590.

llvm-svn: 284615

1 files changed, 61 insertions, 0 deletions

diff --git a/llvm/lib/Support/Windows/TimeValue.inc b/llvm/lib/Support/Windows/TimeValue.inc
new file mode 100644
index 00000000000..b90b4f1da00
--- /dev/null
+++ b/llvm/lib/Support/Windows/TimeValue.inc
@@ -0,0 +1,61 @@
+//===- Win32/TimeValue.cpp - Win32 TimeValue Implementation -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides the Win32 implementation of the TimeValue class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "WindowsSupport.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cctype>
+#include <time.h>
+
+using namespace llvm;
+using namespace llvm::sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Win32 specific code.
+//===----------------------------------------------------------------------===//
+
+TimeValue TimeValue::now() {
+  uint64_t ft;
+  GetSystemTimeAsFileTime(reinterpret_cast<FILETIME *>(&ft));
+
+  TimeValue t(0, 0);
+  t.fromWin32Time(ft);
+  return t;
+}
+
+std::string TimeValue::str() const {
+  std::string S;
+  struct tm *LT;
+#ifdef __MINGW32__
+  // Old versions of mingw don't have _localtime64_s. Remove this once we drop support
+  // for them.
+  time_t OurTime = time_t(this->toEpochTime());
+  LT = ::localtime(&OurTime);
+  assert(LT);
+#else
+  struct tm Storage;
+  __time64_t OurTime = this->toEpochTime();
+  int Error = ::_localtime64_s(&Storage, &OurTime);
+  assert(!Error);
+  (void)Error;
+  LT = &Storage;
+#endif
+
+  char Buffer[sizeof("YYYY-MM-DD HH:MM:SS")];
+  strftime(Buffer, sizeof(Buffer), "%Y-%m-%d %H:%M:%S", LT);
+  raw_string_ostream OS(S);
+  OS << format("%s.%.9u", static_cast<const char *>(Buffer),
+               this->nanoseconds());
+  OS.flush();
+  return S;
+}