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| 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/posix/global_descriptors.h" | |
| 6 | |
| 7 #include <vector> | |
| 8 #include <utility> | |
| 9 | |
| 10 #include "base/logging.h" | |
| 11 | |
| 12 namespace base { | |
| 13 | |
| 14 GlobalDescriptors::Descriptor::Descriptor(Key key, int fd) | |
| 15 : key(key), fd(fd), region(base::MemoryMappedFile::Region::kWholeFile) { | |
| 16 } | |
| 17 | |
| 18 GlobalDescriptors::Descriptor::Descriptor(Key key, | |
| 19 int fd, | |
| 20 base::MemoryMappedFile::Region region) | |
| 21 : key(key), fd(fd), region(region) { | |
| 22 } | |
| 23 | |
| 24 // static | |
| 25 GlobalDescriptors* GlobalDescriptors::GetInstance() { | |
| 26 typedef Singleton<base::GlobalDescriptors, | |
| 27 LeakySingletonTraits<base::GlobalDescriptors> > | |
| 28 GlobalDescriptorsSingleton; | |
| 29 return GlobalDescriptorsSingleton::get(); | |
| 30 } | |
| 31 | |
| 32 int GlobalDescriptors::Get(Key key) const { | |
| 33 const int ret = MaybeGet(key); | |
| 34 | |
| 35 if (ret == -1) | |
| 36 DLOG(FATAL) << "Unknown global descriptor: " << key; | |
| 37 return ret; | |
| 38 } | |
| 39 | |
| 40 int GlobalDescriptors::MaybeGet(Key key) const { | |
| 41 for (Mapping::const_iterator | |
| 42 i = descriptors_.begin(); i != descriptors_.end(); ++i) { | |
| 43 if (i->key == key) | |
| 44 return i->fd; | |
| 45 } | |
| 46 | |
| 47 return -1; | |
| 48 } | |
| 49 | |
| 50 void GlobalDescriptors::Set(Key key, int fd) { | |
| 51 Set(key, fd, base::MemoryMappedFile::Region::kWholeFile); | |
| 52 } | |
| 53 | |
| 54 void GlobalDescriptors::Set(Key key, | |
| 55 int fd, | |
| 56 base::MemoryMappedFile::Region region) { | |
| 57 for (auto& i : descriptors_) { | |
| 58 if (i.key == key) { | |
| 59 i.fd = fd; | |
| 60 i.region = region; | |
| 61 return; | |
| 62 } | |
| 63 } | |
| 64 | |
| 65 descriptors_.push_back(Descriptor(key, fd, region)); | |
| 66 } | |
| 67 | |
| 68 base::MemoryMappedFile::Region GlobalDescriptors::GetRegion(Key key) const { | |
| 69 for (const auto& i : descriptors_) { | |
| 70 if (i.key == key) | |
| 71 return i.region; | |
| 72 } | |
| 73 DLOG(FATAL) << "Unknown global descriptor: " << key; | |
| 74 return base::MemoryMappedFile::Region::kWholeFile; | |
| 75 } | |
| 76 | |
| 77 void GlobalDescriptors::Reset(const Mapping& mapping) { | |
| 78 descriptors_ = mapping; | |
| 79 } | |
| 80 | |
| 81 GlobalDescriptors::GlobalDescriptors() {} | |
| 82 | |
| 83 GlobalDescriptors::~GlobalDescriptors() {} | |
| 84 | |
| 85 } // namespace base | |
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