From 1c06bb107bb915b26d7800138569351851d1ec69 Mon Sep 17 00:00:00 2001
From: Zachary Turner <zturner@google.com>
Date: Wed, 10 Aug 2016 00:02:58 +0000
Subject: [PATCH] Fix build on android and Linux.

gettimeofday() isn't defined without a special header.  Rather
than rely on C apis, let's just use modern C++11 to do this
portably on all platforms using std::chrono.

llvm-svn: 278182
---
 lldb/include/lldb/Host/TimeValue.h    |  2 +-
 lldb/source/Host/common/TimeValue.cpp | 26 ++++++++------------------
 2 files changed, 9 insertions(+), 19 deletions(-)

diff --git a/lldb/include/lldb/Host/TimeValue.h b/lldb/include/lldb/Host/TimeValue.h
index 2ddea46..d8e3f8a 100644
--- a/lldb/include/lldb/Host/TimeValue.h
+++ b/lldb/include/lldb/Host/TimeValue.h
@@ -35,7 +35,7 @@ public:
     TimeValue();
     TimeValue(const TimeValue& rhs);
     TimeValue(const struct timespec& ts);
-    explicit TimeValue(uint32_t seconds, uint32_t nanos = 0);
+    explicit TimeValue(uint32_t seconds, uint64_t nanos = 0);
     ~TimeValue();
 
     //------------------------------------------------------------------
diff --git a/lldb/source/Host/common/TimeValue.cpp b/lldb/source/Host/common/TimeValue.cpp
index b471a3d..db74527 100644
--- a/lldb/source/Host/common/TimeValue.cpp
+++ b/lldb/source/Host/common/TimeValue.cpp
@@ -20,6 +20,8 @@
 #endif
 
 // C++ Includes
+#include <chrono>
+
 // Other libraries and framework includes
 // Project includes
 #include "lldb/Core/Stream.h"
@@ -48,7 +50,7 @@ TimeValue::TimeValue(const struct timespec& ts) :
 {
 }
 
-TimeValue::TimeValue(uint32_t seconds, uint32_t nanos) :
+TimeValue::TimeValue(uint32_t seconds, uint64_t nanos) :
     m_nano_seconds((uint64_t) seconds * NanoSecPerSec + nanos)
 {
 }
@@ -123,23 +125,11 @@ TimeValue::OffsetWithNanoSeconds (uint64_t nsec)
 TimeValue
 TimeValue::Now()
 {
-    uint32_t seconds, nanoseconds;
-#if _MSC_VER
-    SYSTEMTIME st;
-    GetSystemTime(&st);
-    nanoseconds = st.wMilliseconds * 1000000;
-    FILETIME ft;
-    SystemTimeToFileTime(&st, &ft);
-
-    seconds = ((((uint64_t)ft.dwHighDateTime) << 32 | ft.dwLowDateTime) / 10000000) - 11644473600ULL;
-#else
-    struct timeval tv;
-    gettimeofday(&tv, NULL);
-    seconds = tv.tv_sec;
-    nanoseconds = tv.tv_usec * NanoSecPerMicroSec;
-#endif
-    TimeValue now(seconds, nanoseconds);
-    return now;
+  using namespace std::chrono;
+  auto now = system_clock::now();
+  auto ns_since_epoch = duration_cast<std::chrono::nanoseconds>(now.time_since_epoch()).count();
+
+  return TimeValue(0, ns_since_epoch);
 }
 
 //----------------------------------------------------------------------
-- 
2.7.4