Repo created

TMessagesProj/jni/voip/webrtc/base/posix/global_descriptors.cc

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+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/posix/global_descriptors.h"
+
+#include <vector>
+#include <utility>
+
+#include "base/logging.h"
+
+namespace base {
+
+GlobalDescriptors::Descriptor::Descriptor(Key key, int fd)
+    : key(key), fd(fd), region(base::MemoryMappedFile::Region::kWholeFile) {
+}
+
+GlobalDescriptors::Descriptor::Descriptor(Key key,
+                                          int fd,
+                                          base::MemoryMappedFile::Region region)
+    : key(key), fd(fd), region(region) {
+}
+
+// static
+GlobalDescriptors* GlobalDescriptors::GetInstance() {
+  typedef Singleton<base::GlobalDescriptors,
+                    LeakySingletonTraits<base::GlobalDescriptors> >
+      GlobalDescriptorsSingleton;
+  return GlobalDescriptorsSingleton::get();
+}
+
+int GlobalDescriptors::Get(Key key) const {
+  const int ret = MaybeGet(key);
+
+  if (ret == -1)
+    DLOG(DCHECK) << "Unknown global descriptor: " << key;
+  return ret;
+}
+
+int GlobalDescriptors::MaybeGet(Key key) const {
+  for (const auto& i : descriptors_) {
+    if (i.key == key)
+      return i.fd;
+  }
+
+  return -1;
+}
+
+base::ScopedFD GlobalDescriptors::TakeFD(
+    Key key,
+    base::MemoryMappedFile::Region* region) {
+  base::ScopedFD fd;
+  for (auto i = descriptors_.begin(); i != descriptors_.end(); ++i) {
+    if (i->key == key) {
+      *region = i->region;
+      fd.reset(i->fd);
+      descriptors_.erase(i);
+      break;
+    }
+  }
+  return fd;
+}
+
+void GlobalDescriptors::Set(Key key, int fd) {
+  Set(key, fd, base::MemoryMappedFile::Region::kWholeFile);
+}
+
+void GlobalDescriptors::Set(Key key,
+                            int fd,
+                            base::MemoryMappedFile::Region region) {
+  for (auto& i : descriptors_) {
+    if (i.key == key) {
+      i.fd = fd;
+      i.region = region;
+      return;
+    }
+  }
+
+  descriptors_.push_back(Descriptor(key, fd, region));
+}
+
+base::MemoryMappedFile::Region GlobalDescriptors::GetRegion(Key key) const {
+  for (const auto& i : descriptors_) {
+    if (i.key == key)
+      return i.region;
+  }
+  DLOG(DCHECK) << "Unknown global descriptor: " << key;
+  return base::MemoryMappedFile::Region::kWholeFile;
+}
+
+void GlobalDescriptors::Reset(const Mapping& mapping) {
+  descriptors_ = mapping;
+}
+
+GlobalDescriptors::GlobalDescriptors() = default;
+
+GlobalDescriptors::~GlobalDescriptors() = default;
+
+}  // namespace base