delphi - SetWindowsHookEx inside Thread instability -

-

ok guys, i'll try explain problem in complete form. i'm using 1 dll injected in process (injected using virtualallocex/writeprocessmemory/createremotethread don't matter) , dll when run in entrypoint have 1 thing:

procedure entrypoint(reason: integer); begin   if reason = dll_process_attach     begin       mymainthread.create;     end

ok, work being done inside mymainthread (tthread)... in mymainthread set 2 timers, , hook keyboard events using setwindowshookex (wh_keyboard_ll). working fine when separately, is: or setwindowshookex or 2 timers... when both things unknown reason hook works few characters typed in keyboard (less 10) , timers stops, mymainthread doesn't terminate. tests on windows 7 / 2008 perfectly, when running in windows 2003 problems started. mymainthread execute this:

procedure mymainthread.execute; begin   while not terminated     begin       mythread:= self;       startkeyboardhook;       startup;       settimer(0, 0, 600000, @mymainthread.contacthome);       settimer(0, 0, 40000, @mymainthread.mapproc);       createmessagepump;     end; end;

the 2 timers , 'startup' things contact 1 php via indy doing post/get requests, list processes running, , things this... , startkeyboardhook simple this:

procedure mymainthread.startkeyboardhook; begin   if llkeyboardhook = 0     llkeyboardhook:= setwindowshookex(wh_keyboard_ll, @lowlevelkeyboardhook, hinstance, 0); end;

as can see, startkeyboardhook inside mymainthread , llkeyboardhook/lowlevelkeyboardhook global var/method... if put lowlevelkeyboardhook procedure inside thread don't work hook. believe problem not in lowlevelkeyboardhook (the code itself) because said, if don't setup 2 timers, hook works perfectly, if want can post here. said, hook started inside thread, callback procedure , hhook variable global (maybe that's problem)... createmessagepump (last call in thread's execute) procedure necessary timers , hook, since it's lowlevel hook need message queue. why getting instability (for tests show in win2k3), , if put keyboard hook without timers, or timers without hook, works? messagepump is:

procedure mymainthread.createmessagepump; var   appmsg: tmsg; begin   while getmessage(appmsg, 0, 0, 0)     begin       translatemessage(appmsg);       dispatchmessage(appmsg);     end;   //if needed quit procedure use postquitmessage(0); end;

some general advice first.

you asked question, previous question, how organise thread's execute method. answer gave accurate. should heed it.

at each , every question have asked on topic myself, sertac , others have told problems of mis-matching function declarations win32 callbacks. seems did not heed advice. continue use broken api declarations provided rtl, , @ operator. in previous question, sertac showed how correct failings of rtl declarations. if cannot check callbacks match must let compiler that.

you said in comments tried sertac's type safe settimer, "didn't work". mis-diagnosis. sertac's code worked perfectly. error received compiler checking callback declared correctly. since not, compiler stopped. desired behaviour. chose ignore compiler, suppress error, , continue broken callback. correct response have been fix callback.

it rather pointless keep asking questions, receive advice, fail heed advice, , ask same question on , again. must heed advice if want make progress. why ask if won't that?

as detail here, see 2 main problems:

  1. the thread loop never terminates. use exact loop gave in previous question. rather copying it, try understand how works , why right.

  2. your timer call functions not match required signatures. cannot instance methods (or class methods matter). should functions declared @ unit scope. must stdcall. parameter lists must match. since finding hard meet these requirements best if use sertac's code earlier question , compiler enforce type safety.


Comments

Post a Comment

Popular posts from this blog

c# - How Configure Devart dotConnect for SQLite Code First? -

-
can configure following sample code ? when run following code, error : no entity framework provider found ado.net provider invariant name 'devart.data.sqlite' setting in machine.config <system.data> <dbproviderfactories> <add name="dotconnect sqlite" invariant="devart.data.sqlite" description="devart dotconnect sqlite" type="devart.data.sqlite.sqliteproviderfactory, devart.data.sqlite, version=4.6.287.0, culture=neutral, publickeytoken=09af7300eec23701" /> </dbproviderfactories> </system.data> after add below block code in app.config <?xml version="1.0"?> <configuration>   <configsections> <!-- more information on entity framework configuration, visit http://go.microsoft.com/fwlink/?linkid=237468 --> <section name="entityframework" type="system.data.entity.internal.configfile.entityframeworksection, entit...
Read more

java - Copying object fields -

-
what best way of copying classes when need have 2 independent variables? have simple class: public class myclass { boolean = false; string b= "not empty"; } do need make method : assign(myclass data ) { a= data.a; b= data.b; } is there automatic method copy (duplicate) objects in java? do need make method : pretty close. instead of making method, should make constructor. such constructors called copy constructor , , create them this: myclass(myclass data) { = data.a; b = data.b; } and create copy of instance, use constructor this: myclass obj1 = new myclass(); myclass obj2 = new myclass(obj1); copy constructor can tedious : using copy constructor create deep-copy can tedious, when class has mutable fields. in case, assignment create copy of reference, , not object itself. have create copy of fields (if want deep copy). can go recursive. a better way create deep copy serialize , deserialize object. why not use clone()? ...
Read more

c++ - Clear the memory after returning a vector in a function -

-
i have function processes , stores lot of data in , returns results vector of class. amount of data stored in function tremendous , want clear storage memory of function after finished job. necessary (does function automatically clear memory) or should clear memory function? update: vector<customers> process(char* const *filename, vector<int> id) { vector<customers> list_of_customers; (perform actions) return list_of_customers; } variables defined locally within function automatically released @ end of function scope. destructors objects called, should free memory allocated objects (if objects coded correctly). example of such object std::vector . anything you've allocated new must have corresponding delete release storage. try avoid doing own allocation , use raii instead, i.e. containers or smart pointers.
Read more