Deleted OS_WIN and all Windows specific files from base.

base/win/scoped_handle.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/win/scoped_handle.h"
-
-#include <unordered_map>
-
-#include "base/debug/alias.h"
-#include "base/hash.h"
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-#include "base/synchronization/lock_impl.h"
-
-extern "C" {
-__declspec(dllexport) void* GetHandleVerifier();
-typedef void* (*GetHandleVerifierFn)();
-}
-
-namespace {
-
-struct HandleHash {
-  size_t operator()(const HANDLE& handle) const {
-    char buffer[sizeof(handle)];
-    memcpy(buffer, &handle, sizeof(handle));
-    return base::Hash(buffer, sizeof(buffer));
-  }
-};
-
-struct Info {
-  const void* owner;
-  const void* pc1;
-  const void* pc2;
-  DWORD thread_id;
-};
-typedef std::unordered_map<HANDLE, Info, HandleHash> HandleMap;
-
-// g_lock protects the handle map and setting g_active_verifier.
-typedef base::internal::LockImpl NativeLock;
-base::LazyInstance<NativeLock>::Leaky g_lock = LAZY_INSTANCE_INITIALIZER;
-
-bool CloseHandleWrapper(HANDLE handle) {
-  if (!::CloseHandle(handle))
-    CHECK(false);
-  return true;
-}
-
-// Simple automatic locking using a native critical section so it supports
-// recursive locking.
-class AutoNativeLock {
- public:
-  explicit AutoNativeLock(NativeLock& lock) : lock_(lock) {
-    lock_.Lock();
-  }
-
-  ~AutoNativeLock() {
-    lock_.Unlock();
-  }
-
- private:
-  NativeLock& lock_;
-  DISALLOW_COPY_AND_ASSIGN(AutoNativeLock);
-};
-
-// Implements the actual object that is verifying handles for this process.
-// The active instance is shared across the module boundary but there is no
-// way to delete this object from the wrong side of it (or any side, actually).
-class ActiveVerifier {
- public:
-  explicit ActiveVerifier(bool enabled)
-      : enabled_(enabled), closing_(false), lock_(g_lock.Pointer()) {
-  }
-
-  // Retrieves the current verifier.
-  static ActiveVerifier* Get();
-
-  // The methods required by HandleTraits. They are virtual because we need to
-  // forward the call execution to another module, instead of letting the
-  // compiler call the version that is linked in the current module.
-  virtual bool CloseHandle(HANDLE handle);
-  virtual void StartTracking(HANDLE handle, const void* owner,
-                             const void* pc1, const void* pc2);
-  virtual void StopTracking(HANDLE handle, const void* owner,
-                            const void* pc1, const void* pc2);
-  virtual void Disable();
-  virtual void OnHandleBeingClosed(HANDLE handle);
-
- private:
-  ~ActiveVerifier();  // Not implemented.
-
-  static void InstallVerifier();
-
-  bool enabled_;
-  bool closing_;
-  NativeLock* lock_;
-  HandleMap map_;
-  DISALLOW_COPY_AND_ASSIGN(ActiveVerifier);
-};
-ActiveVerifier* g_active_verifier = NULL;
-
-// static
-ActiveVerifier* ActiveVerifier::Get() {
-  if (!g_active_verifier)
-    ActiveVerifier::InstallVerifier();
-
-  return g_active_verifier;
-}
-
-// static
-void ActiveVerifier::InstallVerifier() {
-#if defined(COMPONENT_BUILD)
-  AutoNativeLock lock(g_lock.Get());
-  g_active_verifier = new ActiveVerifier(true);
-#else
-  // If you are reading this, wondering why your process seems deadlocked, take
-  // a look at your DllMain code and remove things that should not be done
-  // there, like doing whatever gave you that nice windows handle you are trying
-  // to store in a ScopedHandle.
-  HMODULE main_module = ::GetModuleHandle(NULL);
-  GetHandleVerifierFn get_handle_verifier =
-      reinterpret_cast<GetHandleVerifierFn>(::GetProcAddress(
-          main_module, "GetHandleVerifier"));
-
-  if (!get_handle_verifier) {
-    g_active_verifier = new ActiveVerifier(false);
-    return;
-  }
-
-  ActiveVerifier* verifier =
-      reinterpret_cast<ActiveVerifier*>(get_handle_verifier());
-
-  // This lock only protects against races in this module, which is fine.
-  AutoNativeLock lock(g_lock.Get());
-  g_active_verifier = verifier ? verifier : new ActiveVerifier(true);
-#endif
-}
-
-bool ActiveVerifier::CloseHandle(HANDLE handle) {
-  if (!enabled_)
-    return CloseHandleWrapper(handle);
-
-  AutoNativeLock lock(*lock_);
-  closing_ = true;
-  CloseHandleWrapper(handle);
-  closing_ = false;
-
-  return true;
-}
-
-void ActiveVerifier::StartTracking(HANDLE handle, const void* owner,
-                                   const void* pc1, const void* pc2) {
-  if (!enabled_)
-    return;
-
-  // Idea here is to make our handles non-closable until we close it ourselves.
-  // Handles provided could be totally fabricated especially through our
-  // unittest, we are ignoring that for now by not checking return value.
-  ::SetHandleInformation(handle, HANDLE_FLAG_PROTECT_FROM_CLOSE,
-                         HANDLE_FLAG_PROTECT_FROM_CLOSE);
-
-  // Grab the thread id before the lock.
-  DWORD thread_id = GetCurrentThreadId();
-
-  AutoNativeLock lock(*lock_);
-
-  Info handle_info = { owner, pc1, pc2, thread_id };
-  std::pair<HANDLE, Info> item(handle, handle_info);
-  std::pair<HandleMap::iterator, bool> result = map_.insert(item);
-  if (!result.second) {
-    Info other = result.first->second;
-    base::debug::Alias(&other);
-    CHECK(false);
-  }
-}
-
-void ActiveVerifier::StopTracking(HANDLE handle, const void* owner,
-                                  const void* pc1, const void* pc2) {
-  if (!enabled_)
-    return;
-
-  // We expect handle to be protected till this point.
-  DWORD flags = 0;
-  if (::GetHandleInformation(handle, &flags)) {
-    CHECK_NE(0U, (flags & HANDLE_FLAG_PROTECT_FROM_CLOSE));
-
-    // Unprotect handle so that it could be closed.
-    ::SetHandleInformation(handle, HANDLE_FLAG_PROTECT_FROM_CLOSE, 0);
-  }
-
-  AutoNativeLock lock(*lock_);
-  HandleMap::iterator i = map_.find(handle);
-  if (i == map_.end())
-    CHECK(false);
-
-  Info other = i->second;
-  if (other.owner != owner) {
-    base::debug::Alias(&other);
-    CHECK(false);
-  }
-
-  map_.erase(i);
-}
-
-void ActiveVerifier::Disable() {
-  enabled_ = false;
-}
-
-void ActiveVerifier::OnHandleBeingClosed(HANDLE handle) {
-  AutoNativeLock lock(*lock_);
-  if (closing_)
-    return;
-
-  HandleMap::iterator i = map_.find(handle);
-  if (i == map_.end())
-    return;
-
-  Info other = i->second;
-  base::debug::Alias(&other);
-  CHECK(false);
-}
-
-}  // namespace
-
-void* GetHandleVerifier() {
-  return g_active_verifier;
-}
-
-namespace base {
-namespace win {
-
-// Static.
-bool HandleTraits::CloseHandle(HANDLE handle) {
-  return ActiveVerifier::Get()->CloseHandle(handle);
-}
-
-// Static.
-void VerifierTraits::StartTracking(HANDLE handle, const void* owner,
-                                   const void* pc1, const void* pc2) {
-  return ActiveVerifier::Get()->StartTracking(handle, owner, pc1, pc2);
-}
-
-// Static.
-void VerifierTraits::StopTracking(HANDLE handle, const void* owner,
-                                  const void* pc1, const void* pc2) {
-  return ActiveVerifier::Get()->StopTracking(handle, owner, pc1, pc2);
-}
-
-void DisableHandleVerifier() {
-  return ActiveVerifier::Get()->Disable();
-}
-
-void OnHandleBeingClosed(HANDLE handle) {
-  return ActiveVerifier::Get()->OnHandleBeingClosed(handle);
-}
-
-}  // namespace win
-}  // namespace base