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base/posix/global_descriptors.cc

 // 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"
@@ skipping 29 matching lines @@
 int GlobalDescriptors::MaybeGet(Key key) const {
   for (Mapping::const_iterator
        i = descriptors_.begin(); i != descriptors_.end(); ++i) {
     if (i->key == key)
       return i->fd;
   }
 
   return -1;
 }
 
+base::ScopedFD GlobalDescriptors::TakeFD(
+    Key key,
+    base::MemoryMappedFile::Region* region) {
+  base::ScopedFD fd;
+  for (Mapping::iterator 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;
@@ skipping 16 matching lines @@
 
 void GlobalDescriptors::Reset(const Mapping& mapping) {
   descriptors_ = mapping;
 }
 
 GlobalDescriptors::GlobalDescriptors() {}
 
 GlobalDescriptors::~GlobalDescriptors() {}
 
 }  // namespace base