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// 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/startup_information.h"
#include "base/logging.h"
#include "base/win/windows_version.h"
namespace {
typedef BOOL (WINAPI *InitializeProcThreadAttributeListFunction)(
LPPROC_THREAD_ATTRIBUTE_LIST attribute_list,
DWORD attribute_count,
DWORD flags,
PSIZE_T size);
static InitializeProcThreadAttributeListFunction
initialize_proc_thread_attribute_list;
typedef BOOL (WINAPI *UpdateProcThreadAttributeFunction)(
LPPROC_THREAD_ATTRIBUTE_LIST attribute_list,
DWORD flags,
DWORD_PTR attribute,
PVOID value,
SIZE_T size,
PVOID previous_value,
PSIZE_T return_size);
static UpdateProcThreadAttributeFunction update_proc_thread_attribute_list;
typedef VOID (WINAPI *DeleteProcThreadAttributeListFunction)(
LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList);
static DeleteProcThreadAttributeListFunction delete_proc_thread_attribute_list;
} // namespace
namespace base {
namespace win {
StartupInformation::StartupInformation() {
memset(&startup_info_, 0, sizeof(startup_info_));
// Pre Windows Vista doesn't support STARTUPINFOEX.
if (base::win::GetVersion() < base::win::VERSION_VISTA) {
startup_info_.StartupInfo.cb = sizeof(STARTUPINFO);
return;
}
startup_info_.StartupInfo.cb = sizeof(startup_info_);
// Load the attribute API functions.
if (!initialize_proc_thread_attribute_list ||
!update_proc_thread_attribute_list ||
!delete_proc_thread_attribute_list) {
HMODULE module = ::GetModuleHandleW(L"kernel32.dll");
initialize_proc_thread_attribute_list =
reinterpret_cast<InitializeProcThreadAttributeListFunction>(
::GetProcAddress(module, "InitializeProcThreadAttributeList"));
update_proc_thread_attribute_list =
reinterpret_cast<UpdateProcThreadAttributeFunction>(
::GetProcAddress(module, "UpdateProcThreadAttribute"));
delete_proc_thread_attribute_list =
reinterpret_cast<DeleteProcThreadAttributeListFunction>(
::GetProcAddress(module, "DeleteProcThreadAttributeList"));
}
}
StartupInformation::~StartupInformation() {
if (startup_info_.lpAttributeList) {
delete_proc_thread_attribute_list(startup_info_.lpAttributeList);
delete [] reinterpret_cast<BYTE*>(startup_info_.lpAttributeList);
}
}
bool StartupInformation::InitializeProcThreadAttributeList(
DWORD attribute_count) {
if (startup_info_.StartupInfo.cb != sizeof(startup_info_) ||
startup_info_.lpAttributeList)
return false;
SIZE_T size = 0;
initialize_proc_thread_attribute_list(NULL, attribute_count, 0, &size);
if (size == 0)
return false;
startup_info_.lpAttributeList =
reinterpret_cast<LPPROC_THREAD_ATTRIBUTE_LIST>(new BYTE[size]);
if (!initialize_proc_thread_attribute_list(startup_info_.lpAttributeList,
attribute_count, 0, &size)) {
delete [] reinterpret_cast<BYTE*>(startup_info_.lpAttributeList);
startup_info_.lpAttributeList = NULL;
return false;
}
return true;
}
bool StartupInformation::UpdateProcThreadAttribute(
DWORD_PTR attribute,
void* value,
size_t size) {
if (!startup_info_.lpAttributeList)
return false;
return !!update_proc_thread_attribute_list(startup_info_.lpAttributeList, 0,
attribute, value, size, NULL, NULL);
}
} // namespace win
} // namespace base
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