Program Listing for File windows-utilities.h

↰ Return to documentation for file (include\utility\windows-utilities.h)

/******************************************************************************
© Intel Corporation.

This software and the related documents are Intel copyrighted materials,
and your use of them is governed by the express license under which they
were provided to you ("License"). Unless the License provides otherwise,
you may not use, modify, copy, publish, distribute, disclose or transmit
this software or the related documents without Intel's prior written
permission.


 This software and the related documents are provided as is, with no express
or implied warranties, other than those that are expressly stated in the
License.

******************************************************************************/
#pragma once

#include <Windows.h>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <functional>
#include <tlhelp32.h>

namespace gpa {
namespace utility {

std::wstring ASCIIToUTF16(const char* ascii, int ascii_size);

std::wstring GetProcessNameFromCMDLine(const std::wstring& cmdLine);

bool IsProcessInSkipList(const wchar_t* skipListFilePath, const wchar_t* processName, bool reReadFile = false);

void EmitGpuViewEvent(TCHAR* pDesc);

bool GetDLLPath(LPCWSTR moduleName, bool address, wchar_t* const path, size_t pathSize, bool silent = false);

std::wstring GetCurrentApplicationPath();

std::wstring GetCurrentModulePath();

std::wstring GetCurrentDllDirectory();

class DllDirectoryGuard
{
public:
    DllDirectoryGuard(const std::wstring& path)
        : mDllDirectory(GetCurrentDllDirectory())
    {
        SetDllDirectoryW(path.c_str());
    }

    ~DllDirectoryGuard()
    {
        SetDllDirectoryW(mDllDirectory.c_str());
    }

private:
    std::wstring mDllDirectory;
};

//Lightweight process listener that allows to get notifications about started and ended processes
class CProcessListener
{
protected:
    typedef std::set<DWORD> TPids;
    TPids mPids;

    std::vector<DWORD> mPidBuffer;  //for eEnumProcess

    //OnStart is called when first encountered in the process list, doesn't mean 'just started' for the first Refresh call
    virtual void OnStart(const PROCESSENTRY32W& pe)  // explicitely include winternl.h in the cpp that uses this struct
    {
        (void)(pe);
    }

    virtual void OnEnd(DWORD pid)  //when pid is no more in the cached list
    {
        (void)(pid);
    }

public:
    enum EApproach { eSnapshot,
                     eEnumProcess };
    CProcessListener(EApproach ea = eSnapshot)
        : mApproach(ea)
        , mPidBuffer(eEnumProcess == ea ? 512 : 0)
    {
    }

    //call as often as you need and subscribe to OnStart/OnEnd - changes will be notified since last Refresh()
    //for the first call will get names of all processes, on next calls is cheap as it tracks the changes and works only on changed processes
    size_t Refresh();  //returns ~0x0 on failure OR how many started and finished since last call to Refresh, 0 means good moment to yeild/switch to other thread/sleep
private:
    EApproach mApproach;
    size_t RefreshSnapshot();

    size_t RefreshEnumProcess();
    size_t UpdatePidsEnumProcess(size_t returned);
};

//handle must have SYNCHRONIZE access
HRESULT PauseResumeProcess(HANDLE proc, bool bPause);

//walk thru all the running processes
HRESULT WalkProcesses(const std::function<bool(const PROCESSENTRY32&)>& callback);  //see ProcessParents() below for example

//gets full map of pid->parent running at the moment
inline std::map<DWORD, DWORD> ProcessParents()
{
    decltype(ProcessParents()) pid2parent;
    gpa::utility::WalkProcesses([&](const PROCESSENTRY32& pe) {
        pid2parent[pe.th32ProcessID] = pe.th32ParentProcessID;
        return true;
    });
    return pid2parent;
}

//full family chain from given pid up to last living forefather. Every time does fresh WalkProcesses. So cache the result to avoid if not necessary.
std::vector<DWORD> ProcessAncestry(DWORD pid);

//lists all threads of given process, pass ~0x0 for all threads
HRESULT WalkThreads(DWORD pid, const std::function<bool(const THREADENTRY32&)>& callback);

//just a helper for ExecuteCommand, use like ExecuteCommand(Shell("dir"), &output)
inline std::string Shell(const std::string& command)
{
    return "cmd.exe /C " + command;
}

//launch process, wait, get output and exit code
int ExecuteCommand(
    const std::string& command,
    std::string* pOutput = nullptr,
    LPCSTR lpCurrentDirectory = nullptr,
    LPVOID lpEnvironment = nullptr  //null delimited, double null terminated string or pairs (name=value\0name=value\0\0) MUST BE UNICODE! Consider gpa::secure::GetSafeEnvironment
);

}  // namespace utility
}  // namespace gpa