Update aosp/master LLVM for rebase to r230699.

[android-x86/external-llvm.git] / lib / Support / FileOutputBuffer.cpp

diff --git a/lib/Support/FileOutputBuffer.cpp b/lib/Support/FileOutputBuffer.cpp
index c62655d..b176a8b 100644 (file)
--- a/lib/Support/FileOutputBuffer.cpp
+++ b/lib/Support/FileOutputBuffer.cpp
@@ -12,12 +12,18 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/Errc.h"
-#include "llvm/Support/FileOutputBuffer.h"
-#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/FileOutputBuffer.h"
 #include "llvm/Support/raw_ostream.h"
 #include <system_error>
 
+#if !defined(_MSC_VER) && !defined(__MINGW32__)
+#include <unistd.h>
+#else
+#include <io.h>
+#endif
+
 using llvm::sys::fs::mapped_file_region;
 
 namespace llvm {
@@ -71,10 +77,17 @@ FileOutputBuffer::create(StringRef FilePath, size_t Size,
   if (EC)
     return EC;
 
+  EC = sys::fs::resize_file(FD, Size);
+  if (EC)
+    return EC;
+
   auto MappedFile = llvm::make_unique<mapped_file_region>(
-      FD, true, mapped_file_region::readwrite, Size, 0, EC);
+      FD, mapped_file_region::readwrite, Size, 0, EC);
+  int Ret = close(FD);
   if (EC)
     return EC;
+  if (Ret)
+    return std::error_code(errno, std::generic_category());
 
   Result.reset(
       new FileOutputBuffer(std::move(MappedFile), FilePath, TempFilePath));
@@ -82,16 +95,10 @@ FileOutputBuffer::create(StringRef FilePath, size_t Size,
   return std::error_code();
 }
 
-std::error_code FileOutputBuffer::commit(int64_t NewSmallerSize) {
+std::error_code FileOutputBuffer::commit() {
   // Unmap buffer, letting OS flush dirty pages to file on disk.
   Region.reset();
 
-  // If requested, resize file as part of commit.
-  if ( NewSmallerSize != -1 ) {
-    std::error_code EC = sys::fs::resize_file(Twine(TempPath), NewSmallerSize);
-    if (EC)
-      return EC;
-  }
 
   // Rename file to final name.
   return sys::fs::rename(Twine(TempPath), Twine(FinalPath));