Move shared_memory into base/memory subdirectory.

base/shared_memory_win.cc

Index: base/shared_memory_win.cc
diff --git a/base/shared_memory_win.cc b/base/shared_memory_win.cc
deleted file mode 100644
index defad6e1cab847acf316a1c103566ea8b6e103dd..0000000000000000000000000000000000000000
--- a/base/shared_memory_win.cc
+++ /dev/null
@@ -1,253 +0,0 @@
-// Copyright (c) 2011 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/utf_string_conversions.h"
-
-namespace {
-
-// Returns the length of the memory section starting at the supplied address.
-size_t GetMemorySectionSize(void* address) {
-  MEMORY_BASIC_INFORMATION memory_info;
-  if (!::VirtualQuery(address, &memory_info, sizeof(memory_info)))
-    return 0;
-  return memory_info.RegionSize - (static_cast<char*>(address) -
-         static_cast<char*>(memory_info.AllocationBase));
-}
-
-}  // namespace.
-
-namespace base {
-
-SharedMemory::SharedMemory()
-    : mapped_file_(NULL),
-      memory_(NULL),
-      read_only_(false),
-      mapped_size_(0),
-      requested_size_(0),
-      lock_(NULL) {
-}
-
-SharedMemory::SharedMemory(const std::wstring& name)
-    : mapped_file_(NULL),
-      memory_(NULL),
-      read_only_(false),
-      requested_size_(0),
-      mapped_size_(0),
-      lock_(NULL),
-      name_(name) {
-}
-
-SharedMemory::SharedMemory(SharedMemoryHandle handle, bool read_only)
-    : mapped_file_(handle),
-      memory_(NULL),
-      read_only_(read_only),
-      requested_size_(0),
-      mapped_size_(0),
-      lock_(NULL) {
-}
-
-SharedMemory::SharedMemory(SharedMemoryHandle handle, bool read_only,
-                           ProcessHandle process)
-    : mapped_file_(NULL),
-      memory_(NULL),
-      read_only_(read_only),
-      requested_size_(0),
-      mapped_size_(0),
-      lock_(NULL) {
-  ::DuplicateHandle(process, handle,
-                    GetCurrentProcess(), &mapped_file_,
-                    STANDARD_RIGHTS_REQUIRED |
-                    (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;
-}
-
-// static
-SharedMemoryHandle SharedMemory::NULLHandle() {
-  return NULL;
-}
-
-// static
-void SharedMemory::CloseHandle(const SharedMemoryHandle& handle) {
-  DCHECK(handle != NULL);
-  ::CloseHandle(handle);
-}
-
-bool SharedMemory::CreateAndMapAnonymous(size_t size) {
-  return CreateAnonymous(size) && Map(size);
-}
-
-bool SharedMemory::Create(const SharedMemoryCreateOptions& options) {
-  // TODO(bsy,sehr): crbug.com/210609 NaCl forces us to round up 64k here,
-  // wasting 32k per mapping on average.
-  static const size_t kSectionMask = 65536 - 1;
-  DCHECK(!options.executable);
-  DCHECK(!mapped_file_);
-  if (options.size == 0)
-    return false;
-
-  // Check maximum accounting for overflow.
-  if (options.size >
-      static_cast<size_t>(std::numeric_limits<int>::max()) - kSectionMask)
-    return false;
-
-  size_t rounded_size = (options.size + kSectionMask) & ~kSectionMask;
-  name_ = ASCIIToWide(options.name == NULL ? "" : *options.name);
-  mapped_file_ = CreateFileMapping(INVALID_HANDLE_VALUE, NULL,
-      PAGE_READWRITE, 0, static_cast<DWORD>(rounded_size),
-      name_.empty() ? NULL : name_.c_str());
-  if (!mapped_file_)
-    return false;
-
-  requested_size_ = options.size;
-
-  // Check if the shared memory pre-exists.
-  if (GetLastError() == ERROR_ALREADY_EXISTS) {
-    // If the file already existed, set requested_size_ to 0 to show that
-    // we don't know the size.
-    requested_size_ = 0;
-    if (!options.open_existing) {
-      Close();
-      return false;
-    }
-  }
-
-  return true;
-}
-
-bool SharedMemory::Delete(const std::string& name) {
-  // intentionally empty -- there is nothing for us to do on Windows.
-  return true;
-}
-
-bool SharedMemory::Open(const std::string& name, bool read_only) {
-  DCHECK(!mapped_file_);
-
-  name_ = ASCIIToWide(name);
-  read_only_ = read_only;
-  mapped_file_ = OpenFileMapping(
-      read_only_ ? FILE_MAP_READ : FILE_MAP_ALL_ACCESS, false,
-      name_.empty() ? NULL : name_.c_str());
-  if (mapped_file_ != NULL) {
-    // Note: size_ is not set in this case.
-    return true;
-  }
-  return false;
-}
-
-bool SharedMemory::MapAt(off_t offset, size_t bytes) {
-  if (mapped_file_ == NULL)
-    return false;
-
-  if (bytes > static_cast<size_t>(std::numeric_limits<int>::max()))
-    return false;
-
-  memory_ = MapViewOfFile(mapped_file_,
-                          read_only_ ? FILE_MAP_READ : FILE_MAP_ALL_ACCESS,
-                          static_cast<uint64>(offset) >> 32,
-                          static_cast<DWORD>(offset),
-                          bytes);
-  if (memory_ != NULL) {
-    DCHECK_EQ(0U, reinterpret_cast<uintptr_t>(memory_) &
-        (SharedMemory::MAP_MINIMUM_ALIGNMENT - 1));
-    mapped_size_ = GetMemorySectionSize(memory_);
-    return true;
-  }
-  return false;
-}
-
-bool SharedMemory::Unmap() {
-  if (memory_ == NULL)
-    return false;
-
-  UnmapViewOfFile(memory_);
-  memory_ = NULL;
-  return true;
-}
-
-bool SharedMemory::ShareToProcessCommon(ProcessHandle process,
-                                        SharedMemoryHandle *new_handle,
-                                        bool close_self) {
-  *new_handle = 0;
-  DWORD access = STANDARD_RIGHTS_REQUIRED | FILE_MAP_READ;
-  DWORD options = 0;
-  HANDLE mapped_file = mapped_file_;
-  HANDLE result;
-  if (!read_only_)
-    access |= FILE_MAP_WRITE;
-  if (close_self) {
-    // DUPLICATE_CLOSE_SOURCE causes DuplicateHandle to close mapped_file.
-    options = DUPLICATE_CLOSE_SOURCE;
-    mapped_file_ = NULL;
-    Unmap();
-  }
-
-  if (process == GetCurrentProcess() && close_self) {
-    *new_handle = mapped_file;
-    return true;
-  }
-
-  if (!DuplicateHandle(GetCurrentProcess(), mapped_file, process,
-      &result, access, FALSE, options))
-    return false;
-  *new_handle = result;
-  return true;
-}
-
-
-void SharedMemory::Close() {
-  if (memory_ != NULL) {
-    UnmapViewOfFile(memory_);
-    memory_ = NULL;
-  }
-
-  if (mapped_file_ != NULL) {
-    CloseHandle(mapped_file_);
-    mapped_file_ = NULL;
-  }
-}
-
-void SharedMemory::Lock() {
-  Lock(INFINITE, NULL);
-}
-
-bool SharedMemory::Lock(uint32 timeout_ms, SECURITY_ATTRIBUTES* sec_attr) {
-  if (lock_ == NULL) {
-    std::wstring name = name_;
-    name.append(L"lock");
-    lock_ = CreateMutex(sec_attr, FALSE, name.c_str());
-    if (lock_ == NULL) {
-      DPLOG(ERROR) << "Could not create mutex.";
-      return false;  // there is nothing good we can do here.
-    }
-  }
-  DWORD result = WaitForSingleObject(lock_, timeout_ms);
-
-  // Return false for WAIT_ABANDONED, WAIT_TIMEOUT or WAIT_FAILED.
-  return (result == WAIT_OBJECT_0);
-}
-
-void SharedMemory::Unlock() {
-  DCHECK(lock_ != NULL);
-  ReleaseMutex(lock_);
-}
-
-SharedMemoryHandle SharedMemory::handle() const {
-  return mapped_file_;
-}
-
-}  // namespace base