src: use uv_gettimeofday() to get microseconds

Use uv_gettimeofday() in GetCurrentTimeInMicroseconds() to remove the need for #ifdef logic. PR-URL: #27029 Reviewed-By: Refael Ackermann <refack@gmail.com>
nodejs · Apr 15, 2019 · 8e1e9946a9f251fd943de1777fd9b598979e5a23 · 8e1e994
1 parent af35d40
commit 8e1e9946a9f251fd943de1777fd9b598979e5a23
Unified Split

Showing with 4 additions and 17 deletions.

+4 −17 src/util.cc
diff --git a/src/util.cc b/src/util.cc
@@ -50,9 +50,6 @@ static std::atomic_int seq = {0};  // Sequence number for diagnostic filenames.
 namespace node {
-  
-// Microseconds in a second, as a float.
-  
-#define MICROS_PER_SEC 1e6
-  
-
 using v8::ArrayBufferView;
 using v8::Isolate;
 using v8::Local;
@@ -166,20 +163,10 @@ void ThrowErrStringTooLong(Isolate* isolate) {
 }
 double GetCurrentTimeInMicroseconds() {
-  
-#ifdef _WIN32
-  
-// The difference between the Unix Epoch and the Windows Epoch in 100-ns ticks.
-  
-#define TICKS_TO_UNIX_EPOCH 116444736000000000LL
-  
-  FILETIME ft;
-  
-  GetSystemTimeAsFileTime(&ft);
-  
-  uint64_t filetime_int =
-  
-      static_cast<uint64_t>(ft.dwHighDateTime) << 32 | ft.dwLowDateTime;
-  
-  // FILETIME is measured in terms of 100 ns. Convert that to 1 us (1000 ns).
-  
-  return (filetime_int - TICKS_TO_UNIX_EPOCH) / 10.;
-  
-#else
-  
-  struct timeval tp;
-  
-  gettimeofday(&tp, nullptr);
-  
-  return MICROS_PER_SEC * tp.tv_sec + tp.tv_usec;
-  
-#endif
+  
+  constexpr double kMicrosecondsPerSecond = 1e6;
+  
+  uv_timeval64_t tv;
+  
+  CHECK_EQ(0, uv_gettimeofday(&tv));
+  
+  return kMicrosecondsPerSecond * tv.tv_sec + tv.tv_usec;
 }
 int WriteFileSync(const char* path, uv_buf_t buf) {