base/global_descriptors_posix.cc

   1 // Copyright (c) 2009 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/global_descriptors_posix.h"
   6
   7 #include <vector>
   8 #include <utility>
   9
  10 #include "base/logging.h"
  11
  12 namespace base {
  13
  14 // static
  15 GlobalDescriptors* GlobalDescriptors::GetInstance() {
  16   typedef Singleton<base::GlobalDescriptors,
  17                     LeakySingletonTraits<base::GlobalDescriptors> >
  18       GlobalDescriptorsSingleton;
  19   return GlobalDescriptorsSingleton::get();
  20 }
  21
  22 int GlobalDescriptors::Get(Key key) const {
  23   const int ret = MaybeGet(key);
  24
  25   if (ret == -1)
  26     LOG(FATAL) << "Unknown global descriptor: " << key;
  27   return ret;
  28 }
  29
  30 int GlobalDescriptors::MaybeGet(Key key) const {
  31   for (Mapping::const_iterator
  32        i = descriptors_.begin(); i != descriptors_.end(); ++i) {
  33     if (i->first == key)
  34       return i->second;
  35   }
  36
  37   // In order to make unittests pass, we define a default mapping from keys to
  38   // descriptors by adding a fixed offset:
  39   return kBaseDescriptor + key;
  40 }
  41
  42 void GlobalDescriptors::Set(Key key, int fd) {
  43   for (Mapping::iterator
  44        i = descriptors_.begin(); i != descriptors_.end(); ++i) {
  45     if (i->first == key) {
  46       i->second = fd;
  47       return;
  48     }
  49   }
  50
  51   descriptors_.push_back(std::make_pair(key, fd));
  52 }
  53
  54 void GlobalDescriptors::Reset(const Mapping& mapping) {
  55   descriptors_ = mapping;
  56 }
  57
  58 GlobalDescriptors::GlobalDescriptors() {}
  59
  60 GlobalDescriptors::~GlobalDescriptors() {}
  61
  62 }  // namespace base