vendor/llvm/llvm-trunk-r290819

1 files changed, 39 insertions, 1 deletions

diff --git a/lib/Support/Unix/Unix.h b/lib/Support/Unix/Unix.h
index 871e612f6c16..239a6d60aaef 100644
--- a/lib/Support/Unix/Unix.h
+++ b/lib/Support/Unix/Unix.h
@@ -19,7 +19,8 @@
 //===          is guaranteed to work on all UNIX variants.
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Config/config.h"     // Get autoconf configuration settings
+#include "llvm/Config/config.h" // Get autoconf configuration settings
+#include "llvm/Support/Chrono.h"
 #include "llvm/Support/Errno.h"
 #include <algorithm>
 #include <assert.h>
@@ -48,6 +49,10 @@
 # include <dlfcn.h>
 #endif
 
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#endif
+
 /// This function builds an error message into \p ErrMsg using the \p prefix
 /// string and the Unix error number given by \p errnum. If errnum is -1, the
 /// default then the value of errno is used.
@@ -65,4 +70,37 @@ static inline bool MakeErrMsg(
   return true;
 }
 
+namespace llvm {
+namespace sys {
+
+/// Convert a struct timeval to a duration. Note that timeval can be used both
+/// as a time point and a duration. Be sure to check what the input represents.
+inline std::chrono::microseconds toDuration(const struct timeval &TV) {
+  return std::chrono::seconds(TV.tv_sec) +
+         std::chrono::microseconds(TV.tv_usec);
+}
+
+/// Convert a time point to struct timespec.
+inline struct timespec toTimeSpec(TimePoint<> TP) {
+  using namespace std::chrono;
+
+  struct timespec RetVal;
+  RetVal.tv_sec = toTimeT(TP);
+  RetVal.tv_nsec = (TP.time_since_epoch() % seconds(1)).count();
+  return RetVal;
+}
+
+/// Convert a time point to struct timeval.
+inline struct timeval toTimeVal(TimePoint<std::chrono::microseconds> TP) {
+  using namespace std::chrono;
+
+  struct timeval RetVal;
+  RetVal.tv_sec = toTimeT(TP);
+  RetVal.tv_usec = (TP.time_since_epoch() % seconds(1)).count();
+  return RetVal;
+}
+
+} // namespace sys
+} // namespace llvm
+
 #endif