зеркало из https://github.com/mozilla/gecko-dev.git
113 строки
2.9 KiB
C++
113 строки
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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#include "DllPrefetchExperimentRegistryInfo.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/NativeNt.h"
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#include "mozilla/ResultExtensions.h"
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namespace mozilla {
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const wchar_t DllPrefetchExperimentRegistryInfo::kExperimentSubKeyPath[] =
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L"SOFTWARE"
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L"\\" MOZ_APP_VENDOR L"\\" MOZ_APP_BASENAME L"\\DllPrefetchExperiment";
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Result<Ok, nsresult> DllPrefetchExperimentRegistryInfo::Open() {
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if (!!mRegKey) {
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return Ok();
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}
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DWORD disposition;
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HKEY rawKey;
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LSTATUS result = ::RegCreateKeyExW(
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HKEY_CURRENT_USER, kExperimentSubKeyPath, 0, nullptr,
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REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, nullptr, &rawKey, &disposition);
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if (result != ERROR_SUCCESS) {
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return Err(NS_ERROR_UNEXPECTED);
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}
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mRegKey.own(rawKey);
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if (disposition == REG_CREATED_NEW_KEY ||
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disposition == REG_OPENED_EXISTING_KEY) {
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return Ok();
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}
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MOZ_ASSERT_UNREACHABLE("Invalid disposition from RegCreateKeyExW");
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return Err(NS_ERROR_UNEXPECTED);
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}
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Result<Ok, nsresult> DllPrefetchExperimentRegistryInfo::ReflectPrefToRegistry(
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int32_t aVal) {
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MOZ_TRY(Open());
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mPrefetchMode = aVal;
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LSTATUS status =
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::RegSetValueExW(mRegKey.get(), mBinPath.get(), 0, REG_DWORD,
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reinterpret_cast<PBYTE>(&aVal), sizeof(aVal));
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if (status != ERROR_SUCCESS) {
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return Err(NS_ERROR_UNEXPECTED);
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}
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return Ok();
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}
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Result<Ok, nsresult> DllPrefetchExperimentRegistryInfo::ReadRegistryValueData(
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DWORD expectedType) {
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MOZ_TRY(Open());
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int32_t data;
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DWORD dataLen = sizeof((ULONG)data);
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DWORD type;
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LSTATUS status =
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::RegQueryValueExW(mRegKey.get(), mBinPath.get(), nullptr, &type,
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reinterpret_cast<PBYTE>(&data), &dataLen);
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if (status == ERROR_FILE_NOT_FOUND) {
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// The registry key has not been created, set to default 0
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mPrefetchMode = 0;
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return Ok();
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}
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if (status != ERROR_SUCCESS) {
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return Err(NS_ERROR_UNEXPECTED);
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}
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if (type != expectedType) {
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return Err(NS_ERROR_UNEXPECTED);
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}
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mPrefetchMode = data;
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return Ok();
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}
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AlteredDllPrefetchMode
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DllPrefetchExperimentRegistryInfo::GetAlteredDllPrefetchMode() {
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Result<Ok, nsresult> result = ReadRegistryValueData(REG_DWORD);
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if (!result.isOk()) {
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MOZ_ASSERT(false);
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return AlteredDllPrefetchMode::CurrentPrefetch;
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}
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switch (mPrefetchMode) {
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case 0:
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return AlteredDllPrefetchMode::CurrentPrefetch;
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case 1:
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return AlteredDllPrefetchMode::NoPrefetch;
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case 2:
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return AlteredDllPrefetchMode::OptimizedPrefetch;
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default:
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MOZ_ASSERT(false);
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return AlteredDllPrefetchMode::CurrentPrefetch;
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}
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}
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} // namespace mozilla
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