base/nix/mime_util_xdg.cc

   1 // Copyright (c) 2012 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/nix/mime_util_xdg.h"
   6
   7 #include "base/files/file_path.h"
   8 #include "base/lazy_instance.h"
   9 #include "base/synchronization/lock.h"
  10 #include "base/third_party/xdg_mime/xdgmime.h"
  11 #include "base/threading/thread_restrictions.h"
  12
  13 namespace base {
  14 namespace nix {
  15
  16 namespace {
  17
  18 // None of the XDG stuff is thread-safe, so serialize all access under
  19 // this lock.
  20 LazyInstance<Lock>::Leaky g_mime_util_xdg_lock = LAZY_INSTANCE_INITIALIZER;
  21
  22 }  // namespace
  23
  24 std::string GetFileMimeType(const FilePath& filepath) {
  25   if (filepath.empty())
  26     return std::string();
  27   ThreadRestrictions::AssertIOAllowed();
  28   AutoLock scoped_lock(g_mime_util_xdg_lock.Get());
  29   return xdg_mime_get_mime_type_from_file_name(filepath.value().c_str());
  30 }
  31
  32 std::string GetDataMimeType(const std::string& data) {
  33   ThreadRestrictions::AssertIOAllowed();
  34   AutoLock scoped_lock(g_mime_util_xdg_lock.Get());
  35   return xdg_mime_get_mime_type_for_data(data.data(), data.length(), NULL);
  36 }
  37
  38 }  // namespace nix
  39 }  // namespace base