jcivelli@chromium.org | c30c76f | 2012-06-27 10:12:24 +0900 | [diff] [blame] | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
agl@chromium.org | 28a12e7 | 2009-06-13 02:36:55 +0900 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
brettw@chromium.org | ea3b3f2 | 2012-11-10 08:46:54 +0900 | [diff] [blame] | 5 | #include "base/posix/global_descriptors.h" |
agl@chromium.org | 28a12e7 | 2009-06-13 02:36:55 +0900 | [diff] [blame] | 6 | |
| 7 | #include <vector> |
| 8 | #include <utility> |
| 9 | |
| 10 | #include "base/logging.h" |
| 11 | |
| 12 | namespace base { |
| 13 | |
mkosiba | 7fcbf66 | 2015-01-09 22:10:22 +0900 | [diff] [blame] | 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 | |
evan@chromium.org | 77f9586 | 2010-12-08 06:26:47 +0900 | [diff] [blame] | 24 | // static |
| 25 | GlobalDescriptors* GlobalDescriptors::GetInstance() { |
| 26 | typedef Singleton<base::GlobalDescriptors, |
| 27 | LeakySingletonTraits<base::GlobalDescriptors> > |
| 28 | GlobalDescriptorsSingleton; |
| 29 | return GlobalDescriptorsSingleton::get(); |
| 30 | } |
| 31 | |
erg@google.com | 37c078e | 2011-01-11 09:50:59 +0900 | [diff] [blame] | 32 | int GlobalDescriptors::Get(Key key) const { |
| 33 | const int ret = MaybeGet(key); |
| 34 | |
| 35 | if (ret == -1) |
Sigurdur Asgeirsson | 59235e6 | 2017-09-26 05:02:09 +0900 | [diff] [blame] | 36 | DLOG(DCHECK) << "Unknown global descriptor: " << key; |
erg@google.com | 37c078e | 2011-01-11 09:50:59 +0900 | [diff] [blame] | 37 | return ret; |
| 38 | } |
| 39 | |
agl@chromium.org | 28a12e7 | 2009-06-13 02:36:55 +0900 | [diff] [blame] | 40 | int GlobalDescriptors::MaybeGet(Key key) const { |
| 41 | for (Mapping::const_iterator |
| 42 | i = descriptors_.begin(); i != descriptors_.end(); ++i) { |
mkosiba | 7fcbf66 | 2015-01-09 22:10:22 +0900 | [diff] [blame] | 43 | if (i->key == key) |
| 44 | return i->fd; |
agl@chromium.org | 28a12e7 | 2009-06-13 02:36:55 +0900 | [diff] [blame] | 45 | } |
| 46 | |
jcivelli@chromium.org | c30c76f | 2012-06-27 10:12:24 +0900 | [diff] [blame] | 47 | return -1; |
agl@chromium.org | 28a12e7 | 2009-06-13 02:36:55 +0900 | [diff] [blame] | 48 | } |
| 49 | |
jcivelli | d7470ef | 2017-02-17 03:38:59 +0900 | [diff] [blame] | 50 | base::ScopedFD GlobalDescriptors::TakeFD( |
| 51 | Key key, |
| 52 | base::MemoryMappedFile::Region* region) { |
| 53 | base::ScopedFD fd; |
| 54 | for (Mapping::iterator i = descriptors_.begin(); i != descriptors_.end(); |
| 55 | ++i) { |
| 56 | if (i->key == key) { |
| 57 | *region = i->region; |
| 58 | fd.reset(i->fd); |
| 59 | descriptors_.erase(i); |
| 60 | break; |
| 61 | } |
| 62 | } |
| 63 | return fd; |
| 64 | } |
| 65 | |
agl@chromium.org | 28a12e7 | 2009-06-13 02:36:55 +0900 | [diff] [blame] | 66 | void GlobalDescriptors::Set(Key key, int fd) { |
mkosiba | 7fcbf66 | 2015-01-09 22:10:22 +0900 | [diff] [blame] | 67 | Set(key, fd, base::MemoryMappedFile::Region::kWholeFile); |
| 68 | } |
| 69 | |
| 70 | void GlobalDescriptors::Set(Key key, |
| 71 | int fd, |
| 72 | base::MemoryMappedFile::Region region) { |
| 73 | for (auto& i : descriptors_) { |
| 74 | if (i.key == key) { |
| 75 | i.fd = fd; |
| 76 | i.region = region; |
agl@chromium.org | 28a12e7 | 2009-06-13 02:36:55 +0900 | [diff] [blame] | 77 | return; |
| 78 | } |
| 79 | } |
| 80 | |
mkosiba | 7fcbf66 | 2015-01-09 22:10:22 +0900 | [diff] [blame] | 81 | descriptors_.push_back(Descriptor(key, fd, region)); |
| 82 | } |
| 83 | |
| 84 | base::MemoryMappedFile::Region GlobalDescriptors::GetRegion(Key key) const { |
| 85 | for (const auto& i : descriptors_) { |
| 86 | if (i.key == key) |
| 87 | return i.region; |
| 88 | } |
Sigurdur Asgeirsson | 59235e6 | 2017-09-26 05:02:09 +0900 | [diff] [blame] | 89 | DLOG(DCHECK) << "Unknown global descriptor: " << key; |
mkosiba | 7fcbf66 | 2015-01-09 22:10:22 +0900 | [diff] [blame] | 90 | return base::MemoryMappedFile::Region::kWholeFile; |
agl@chromium.org | 28a12e7 | 2009-06-13 02:36:55 +0900 | [diff] [blame] | 91 | } |
| 92 | |
erg@google.com | 37c078e | 2011-01-11 09:50:59 +0900 | [diff] [blame] | 93 | void GlobalDescriptors::Reset(const Mapping& mapping) { |
| 94 | descriptors_ = mapping; |
| 95 | } |
| 96 | |
Chris Watkins | d155d9f | 2017-11-29 16:16:38 +0900 | [diff] [blame^] | 97 | GlobalDescriptors::GlobalDescriptors() = default; |
erg@google.com | 37c078e | 2011-01-11 09:50:59 +0900 | [diff] [blame] | 98 | |
Chris Watkins | d155d9f | 2017-11-29 16:16:38 +0900 | [diff] [blame^] | 99 | GlobalDescriptors::~GlobalDescriptors() = default; |
erg@google.com | 37c078e | 2011-01-11 09:50:59 +0900 | [diff] [blame] | 100 | |
agl@chromium.org | 28a12e7 | 2009-06-13 02:36:55 +0900 | [diff] [blame] | 101 | } // namespace base |