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      1 // Copyright (c) 2008 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "base/test/test_file_util.h"
      6 
      7 #include <fcntl.h>
      8 #include <sys/stat.h>
      9 #include <sys/types.h>
     10 
     11 #include "base/file_path.h"
     12 
     13 namespace file_util {
     14 
     15 bool EvictFileFromSystemCache(const FilePath& file) {
     16   int fd = open(file.value().c_str(), O_RDONLY);
     17   if (fd < 0)
     18     return false;
     19   if (fdatasync(fd) != 0)
     20     return false;
     21   if (posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED) != 0)
     22     return false;
     23   close(fd);
     24   return true;
     25 }
     26 
     27 }  // namespace file_util
     28