POSIX: Transfer network data using shared memory

base/shared_memory_win.cc

 // Copyright (c) 2006-2008 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/shared_memory.h"
 
 #include "base/logging.h"
 #include "base/win_util.h"
 
 namespace base {
@@ skipping 27 matching lines @@
                     (read_only_ ? FILE_MAP_READ : FILE_MAP_ALL_ACCESS),
                     FALSE, 0);
 }
 
 SharedMemory::~SharedMemory() {
   Close();
   if (lock_ != NULL)
     CloseHandle(lock_);
 }
 
+// static
+bool SharedMemory::IsHandleValid(const SharedMemoryHandle& handle) {
+  return handle != NULL;
+}
+
 bool SharedMemory::Create(const std::wstring &name, bool read_only,
                           bool open_existing, size_t size) {
   DCHECK(mapped_file_ == NULL);
 
   name_ = name;
   read_only_ = read_only;
   mapped_file_ = CreateFileMapping(INVALID_HANDLE_VALUE, NULL,
       read_only_ ? PAGE_READONLY : PAGE_READWRITE, 0, static_cast<DWORD>(size),
       name.empty() ? NULL : name.c_str());
   if (!mapped_file_)
@@ skipping 103 matching lines @@
     }
   }
   WaitForSingleObject(lock_, INFINITE);
 }
 
 void SharedMemory::Unlock() {
   DCHECK(lock_ != NULL);
   ReleaseMutex(lock_);
 }
 
+SharedMemoryHandle SharedMemory::handle() const {
+  return mapped_file_;
+}
+
 }  // namespace base