快速的方法来检查特定的进程在运行

本文介绍了快速的方法来检查特定的进程在运行的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 要检查进程正在运行，可以使用CreateToolHelp32SnapShotWindows API函数和枚举正在运行的进程。例如C / C ++代码在答题给出：的检查一个特定进程是否是在用C Windows上运行++ To check a process is running, one can use the "CreateToolHelp32SnapShot" Windows API function and enumerate the running processes. Example C/C++ code is given in the answer question:Check whether one specific process is running on windows with C++我的问题是，是否有找到答案没有一个更快的方法不必检查每个过程反过来，如果你知道你正在寻找一个具体过程？我们需要定期检查，我们的远程支持工具，TeamViewer.exe，正在运行。请注意，TeamViewer是由第三方写的，我们有超过它或EXE的内部知识无法控制My question is whether there is a faster way to find the answer without having to check each process in turn if you know you're looking for a specific process? We need to regularly check that our remote support tool, TeamViewer.exe, is running. Note that TeamViewer is written by a 3rd party, we have no control over it or knowledge of the internals of the EXE.编辑： TeamViewer提供关于可用于在这种情况下（参见接受的答案），以加快这其进程的内部的一些信息。答案还演示了如何加快这一检查中的任何进程（通过保存的进程ID）。TeamViewer have provided some information about the internals of their process which can be used to speed this up in this instance (see accepted answer). The answer also shows how to speed up this check for any process (by saving the process ID).推荐答案在很多研究（从TeamViewer支持）我张贴一个明确的答案回应，希望帮助他人。代码是在Delphi中，但可以很容易地转换为C ++。After much research (and a response from TeamViewer support) I am posting a definitive answer, hope it helpful to others. Code is in Delphi but can be translated easily to C++. *如果您有没有信息关于过程的内部* function IsRemoteSupportRunning() : Boolean;var hSnapShot, hProcess: THandle; process: TProcessEntry32; bFound: Boolean;begin bFound := False; if (cache.dwTeamViewerID = 0) then begin // TeamViewer not running...is it running now? try hSnapShot := CreateToolHelp32SnapShot(TH32CS_SNAPPROCESS, 0); process.dwSize := Sizeof(TProcessEntry32); if (Process32First(hSnapShot, process)) then bFound := (AnsiCompareText(REMOTE_SUPPORT_EXE, process.szExeFile) = 0); if (not bFound) then begin while (Process32Next(hSnapShot, process)) do begin bFound := (AnsiCompareText(REMOTE_SUPPORT_EXE, process.szExeFile) = 0); if (bFound) then break; end; end; CloseHandle(hSnapShot); except end; // If found, save the process ID if (bFound) then cache.dwTeamViewerID := process.th32ProcessID; end else begin // In a previous call to this function, TeamViewer was running... hProcess := OpenProcess(PROCESS_ALL_ACCESS, False, cache.dwTeamViewerID); if (hProcess > 0) then begin // Still running! bFound := True; CloseHandle(hProcess); end else begin // Process is no longer running cache.dwTeamViewerID := 0; end; end; Result := bFound;end;在我的机器上，这会消耗〜1.5毫秒，如果TeamViewer.exe没有运行。一旦运行，PID是已知的，这种下降到〜6.8μs。On my machine, this consumes ~1.5ms if TeamViewer.exe is not running. Once running and the PID is known, this drops to ~6.8µs. *如果你有一些信息，亦或是拥有控制权，这个过程* * IF YOU HAVE SOME INFO ABOUT, OR HAVE CONTROL OVER, THE PROCESS *有多种可能性这里。例如，这个过程可能会创建（或你的代码的过程中创建）使用此代码共享内存对象：There are a number of possibilities here. For example, the process may create (or you code the process to create) a shared memory object using this code:CreateFileMapping(HWND($FFFFFFFF), nil, PAGE_READONLY, 0, 32, 'MyProcess');您现在可以通过使用此检查过程中运行：You can now check for the process running by using this:var hMapping: HWND;hMapping := CreateFileMapping(HWND($FFFFFFFF), nil, PAGE_READONLY, 0, 32, 'MyProcess');if (hMapping <> 0) then begin if (GetLastError() = ERROR_ALREADY_EXISTS) then bRunning := True; CloseHandle(hMapping); end; 最后，TeamViewer支持通知我关于命名的互斥体对象，你会在下面的代码中看到。请注意，这是特定于TeamViewer，但如果你有控制权的过程中，你可以创建一个互斥体，并使用这种技术。在我的系统，消耗了〜2.6μsFinally, TeamViewer support informed me about a named mutex object which you'll see in the code below. Note that this is specific to TeamViewer, but if you had control over the process, you could create a mutex and use this technique. On my system, this consumes ~2.6µs!function IsRemoteSupportRunning() : Boolean;var hProcess: THandle;begin // Use OpenMutex to see if TeamViewer.exe is running... Result := False; hProcess := OpenMutex(MUTEX_ALL_ACCESS, False, PChar('TeamViewer_Win32_Instance_Mutex')); if (hProcess > 0) then begin bFound := True; CloseHandle(hProcess); end;end; TeamViewer告诉我一个强大的工具WinObj调查系统中的对象的，的 https://technet.microsoft.com/de-de/sysinternals/bb896657.aspx 。退房的BaseNamedObjects。互斥显示为突变。TeamViewer informed me of a powerful tool WinObj to investigate objects in the system, https://technet.microsoft.com/de-de/sysinternals/bb896657.aspx. Check out the BaseNamedObjects. Mutexes appear as "Mutant". 这篇关于快速的方法来检查特定的进程在运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！