2 //windows messages like system based on lcore tasks
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5 uses pgtypes,sysutils,bsearchtree,strings,syncobjs;
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14 hwnd=qword; //window handles are monotonically increasing 64 bit integers,
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15 //this should allow for a million windows per second for over half
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18 twndproc=function(ahWnd:HWND; auMsg:Integer; awParam:WPARAM; alParam:LPARAM):Integer; stdcall;
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23 lpfnwndproc : twndproc;
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24 cbclsextra : integer;
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25 cbwndextra : integer;
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26 hinstance : thinstance;
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29 hbrbackground : hbrush;
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30 lpszmenuname : pchar;
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31 lpszclassname : pchar;
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33 PWNDCLASS=^twndclass;
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37 tTIMERPROC = procedure (ahwnd:HWND; umsg:integer; idevent:taddrint;dwtime:taddrint);stdcall;
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57 THevent=TEventObject;
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59 WS_EX_TOOLWINDOW = $80;
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60 WS_POPUP = longint($80000000);
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65 INFINITE = syncobjs.infinite;
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66 function getwindowlongptr(ahwnd:hwnd;nindex:integer) : taddrint;
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67 function setwindowlongptr(ahwnd:hwnd;nindex:integer;dwNewLong : taddrint) : taddrint;
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68 function DefWindowProc(ahWnd:HWND; auMsg:Integer; awParam:WPARAM; alParam:LPARAM):Integer; stdcall;
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69 function RegisterClass(const lpWndClass:TWNDCLASS):ATOM;
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70 function CreateWindowEx(dwExStyle:DWORD; lpClassName:LPCSTR; lpWindowName:LPCSTR; dwStyle:DWORD; X:longint;Y:longint; nWidth:longint; nHeight:longint; hWndParent:HWND; hMenu:HMENU;hInstance:HINST; lpParam:LPVOID):HWND;
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71 function DestroyWindow(ahWnd:HWND):WINBOOL;
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72 function PostMessage(hWnd:HWND; Msg:UINT; wParam:WPARAM; lParam:LPARAM):WINBOOL;
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73 function PeekMessage(var lpMsg: TMsg; hWnd: HWND; wMsgFilterMin, wMsgFilterMax, wRemoveMsg: UINT): WINBOOL;
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74 function DispatchMessage(const lpMsg: TMsg): Longint;
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75 function GetMessage(var lpMsg: TMsg; hWnd: HWND; wMsgFilterMin, wMsgFilterMax: UINT): WINBOOL;
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76 function SetEvent(hEvent:THevent):WINBOOL;
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77 function CreateEvent(lpEventAttributes:PSECURITYATTRIBUTES; bManualReset:WINBOOL; bInitialState:WINBOOL; lpName:pchar):tHevent;
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78 function terminatethread(threadhandle : tthreadid;dummy:integer) : boolean;
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79 function waitforsingleevent(event:thevent;timeout:cardinal) : twaitresult;
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80 function SetTimer(ahWnd:HWND; nIDEvent:taddrint; uElapse:UINT; lpTimerFunc:tTIMERPROC):UINT;
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81 function KillTimer(ahWnd:HWND; uIDEvent:taddrint):WINBOOL;
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87 baseunix,unix,lcore,unixutil;//,safewriteln;
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91 tmessageintransit = class
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93 next : tmessageintransit;
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97 messagequeue : tmessageintransit;
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98 messageevent : teventobject;
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100 lcorethread : boolean;
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101 nexttimer : ttimeval;
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102 threadid : integer;
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106 extrawindowmemory : pointer;
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107 threadid : tthreadid;
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108 windowproc : twndproc;
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112 structurelock : tcriticalsection;
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113 threaddata : thashtable;
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114 windowclasses : thashtable;
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115 lcorelinkpipesend : integer;
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116 lcorelinkpiperecv : tlasio;
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117 windows : thashtable;
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118 //I would rather things crash immediately
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119 //if they use an insufficiant size type
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120 //than crash after over four billion
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121 //windows have been made ;)
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122 nextwindowhandle : qword = $100000000;
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123 {$i ltimevalstuff.inc}
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125 //findthreaddata should only be called while holding the structurelock
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126 function findthreaddata(threadid : integer) : tthreaddata;
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128 result := tthreaddata(findtree(@threaddata,inttostr(threadid)));
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129 if result = nil then begin
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130 result := tthreaddata.create;
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131 result.messageevent := teventobject.create(nil,false,false,inttostr(taddrint(result)));
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132 result.nexttimer := tv_invalidtimebig;
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133 result.threadid := threadid;
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134 addtree(@threaddata,inttostr(threadid),result);
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138 //deletethreaddataifunused should only be called while holding the structurelock
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139 procedure deletethreaddataifunused(athreaddata : tthreaddata);
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141 //writeln('in deletethreaddataifunused');
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142 if (athreaddata <> nil) then if (athreaddata.waiting=false) and (athreaddata.messagequeue=nil) and (athreaddata.lcorethread=false) and (athreaddata.nexttimer.tv_sec=tv_invalidtimebig.tv_sec) and (athreaddata.nexttimer.tv_usec=tv_invalidtimebig.tv_usec) then begin
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143 //writeln('threaddata is unused, freeing messageevent');
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144 athreaddata.messageevent.free;
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145 //writeln('freeing thread data object');
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147 //writeln('deleting thread data object from hashtable');
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148 deltree(@threaddata,inttostr(athreaddata.threadid));
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149 //writeln('finished deleting thread data');
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151 //writeln('thread data is not unused');
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155 function getwindowlongptr(ahwnd:hwnd;nindex:integer) : taddrint;
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159 structurelock.acquire;
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161 window := findtree(@windows,inttostr(ahwnd));
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162 if window <> nil then begin
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163 result := paddrint(taddrint(window.extrawindowmemory)+nindex)^;
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168 structurelock.release;
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172 function setwindowlongptr(ahwnd:hwnd;nindex:integer;dwNewLong : taddrint) : taddrint;
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176 structurelock.acquire;
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178 window := findtree(@windows,inttostr(ahwnd));
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179 if window <> nil then begin
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180 result := paddrint(taddrint(window.extrawindowmemory)+nindex)^;
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181 paddrint(taddrint(window.extrawindowmemory)+nindex)^ := dwnewlong;
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186 structurelock.release;
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192 function DefWindowProc(ahWnd:HWND; auMsg:Integer; awParam:WPARAM; alParam:LPARAM):Integer; stdcall;
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197 function strdup(s:pchar) : pchar;
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199 //swriteln('in strdup, about to allocate memory');
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200 result := getmem(strlen(s)+1);
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201 //swriteln('about to copy string');
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203 //swriteln('leaving strdup');
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206 function RegisterClass(const lpWndClass:TWNDCLASS):ATOM;
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208 storedwindowclass:pwndclass;
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210 structurelock.acquire;
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212 //swriteln('in registerclass, about to check for duplicate window class');
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213 storedwindowclass := findtree(@windowclasses, lpwndclass.lpszclassname);
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214 if storedwindowclass <> nil then begin
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216 if comparebyte(storedwindowclass^,lpwndclass,sizeof(twndclass)-sizeof(pchar)-sizeof(pchar)) <> 0 then begin
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217 //swriteln('duplicate window class registered with different settings');
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218 raise exception.create('duplicate window class registered with different settings');
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220 //swriteln('duplicate window class registered with same settings, tollerated');
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223 //swriteln('about to allocate memory for new windowclass');
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224 storedwindowclass := getmem(sizeof(twndclass));
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225 //swriteln('about to copy windowclass from parameter');
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226 move(lpwndclass,storedwindowclass^,sizeof(twndclass));
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227 //swriteln('about to copy strings');
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228 if lpwndclass.lpszmenuname <> nil then storedwindowclass.lpszmenuname := strdup(lpwndclass.lpszmenuname);
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229 if lpwndclass.lpszclassname <> nil then storedwindowclass.lpszclassname := strdup(lpwndclass.lpszclassname);
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230 //swriteln('about to add result to list of windowclasses');
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231 addtree(@windowclasses,lpwndclass.lpszclassname,storedwindowclass);
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233 //swriteln('about to return result');
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234 result := storedwindowclass;
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235 //swriteln('leaving registerclass');
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237 structurelock.release;
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241 function CreateWindowEx(dwExStyle:DWORD; lpClassName:LPCSTR; lpWindowName:LPCSTR; dwStyle:DWORD; X:longint;Y:longint; nWidth:longint; nHeight:longint; hWndParent:HWND; hMenu:HMENU;hInstance:HINST; lpParam:LPVOID):HWND;
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243 wndclass : pwndclass;
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244 tm : tthreadmanager;
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247 structurelock.acquire;
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249 window := twindow.create;
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250 window.hwnd := nextwindowhandle;
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251 result := window.hwnd;
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252 nextwindowhandle := nextwindowhandle + 1;
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253 addtree(@windows,inttostr(window.hwnd),window);
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254 wndclass := findtree(@windowclasses,lpclassname);
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255 window.extrawindowmemory := getmem(wndclass.cbwndextra);
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257 getthreadmanager(tm);
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258 window.threadid := tm.GetCurrentThreadId;
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259 window.windowproc := wndclass.lpfnwndproc;
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261 structurelock.release;
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264 function DestroyWindow(ahWnd:HWND):WINBOOL;
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267 windowthreaddata : tthreaddata;
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268 currentmessage : tmessageintransit;
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269 prevmessage : tmessageintransit;
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271 //writeln('started to destroy window');
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272 structurelock.acquire;
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274 window := twindow(findtree(@windows,inttostr(ahwnd)));
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275 if window <> nil then begin
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276 freemem(window.extrawindowmemory);
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277 //writeln('aboute to delete window from windows structure');
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278 deltree(@windows,inttostr(ahwnd));
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279 //writeln('deleted window from windows structure');
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280 windowthreaddata := tthreaddata(findtree(@threaddata,inttostr(window.threadid)));
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282 if windowthreaddata <> nil then begin
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283 //writeln('found thread data scanning for messages to clean up');
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284 currentmessage := windowthreaddata.messagequeue;
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285 prevmessage := nil;
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286 while currentmessage <> nil do begin
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287 while (currentmessage <> nil) and (currentmessage.msg.hwnd = ahwnd) do begin
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288 if prevmessage = nil then begin
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289 windowthreaddata.messagequeue := currentmessage.next;
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291 prevmessage.next := currentmessage.next;
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293 currentmessage.free;
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294 if prevmessage = nil then begin
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295 currentmessage := windowthreaddata.messagequeue;
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297 currentmessage := prevmessage.next;
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300 if currentmessage <> nil then begin
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301 prevmessage := currentmessage;
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302 currentmessage := currentmessage.next;
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305 //writeln('deleting thread data structure if it is unused');
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306 deletethreaddataifunused(windowthreaddata);
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308 //writeln('there is no thread data to search for messages to cleanup');
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310 //writeln('freeing window');
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317 structurelock.release;
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319 //writeln('window destroyed');
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324 function PostMessage(hWnd:HWND; Msg:UINT; wParam:WPARAM; lParam:LPARAM):WINBOOL;
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326 threaddata : tthreaddata;
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327 message : tmessageintransit;
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328 messagequeueend : tmessageintransit;
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331 structurelock.acquire;
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333 window := findtree(@windows,inttostr(hwnd));
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334 if window <> nil then begin
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335 threaddata := findthreaddata(window.threadid);
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336 message := tmessageintransit.create;
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337 message.msg.hwnd := hwnd;
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338 message.msg.message := msg;
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339 message.msg.wparam := wparam;
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340 message.msg.lparam := lparam;
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341 if threaddata.lcorethread then begin
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342 //swriteln('posting message to lcore thread');
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343 fdwrite(lcorelinkpipesend,message,sizeof(message));
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345 //writeln('posting message to non lcore thread');
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346 if threaddata.messagequeue = nil then begin
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347 threaddata.messagequeue := message;
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349 messagequeueend := threaddata.messagequeue;
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350 while messagequeueend.next <> nil do begin
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351 messagequeueend := messagequeueend.next;
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353 messagequeueend.next := message;
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356 //writeln('message added to queue');
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357 if threaddata.waiting then threaddata.messageevent.setevent;
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364 structurelock.release;
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369 function gettickcount : dword;
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375 result64 := (tv.tv_sec*1000)+(tv.tv_usec div 1000);
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376 result := result64;
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379 function DispatchMessage(const lpMsg: TMsg): Longint;
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381 timerproc : ttimerproc;
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383 windowproc : twndproc;
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385 ////swriteln('in dispatchmessage, msg.hwnd='+inttohex(taddrint(lpmsg.hwnd),16));
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386 if (lpmsg.lparam <> 0) and (lpmsg.message = WM_TIMER) then begin
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387 timerproc := ttimerproc(lpmsg.lparam);
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388 timerproc(lpmsg.hwnd,lpmsg.message,lpmsg.wparam,gettickcount);
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391 structurelock.acquire;
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393 window := findtree(@windows,inttostr(lpmsg.hwnd));
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394 //we have to get the window procedure while the structurelock
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395 //is still held as the window could be destroyed from another thread
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397 windowproc := window.windowproc;
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399 structurelock.release;
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401 if window <> nil then begin
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402 result := windowproc(lpmsg.hwnd,lpmsg.message,lpmsg.wparam,lpmsg.lparam);
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409 procedure processtimers;
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413 function GetMessageinternal(var lpMsg: TMsg; hWnd: HWND; wMsgFilterMin, wMsgFilterMax: UINT; wremovemsg : UINT;peek:boolean): WINBOOL;
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415 tm : tthreadmanager;
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416 threaddata : tthreaddata;
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417 message : tmessageintransit;
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419 timeouttv : ttimeval;
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423 if hwnd <> 0 then raise exception.create('getting messages for an individual window is not supported');
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424 if (wmsgfiltermin <> 0) or (wmsgfiltermax <> 0) then raise exception.create('message filtering is not supported');
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425 structurelock.acquire;
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428 getthreadmanager(tm);
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429 threaddata := findthreaddata(tm.GetCurrentThreadId);
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430 if threaddata.lcorethread then raise exception.create('get/peek message cannot be used in the lcore thread');
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431 message := threaddata.messagequeue;
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432 gettimeofday(nowtv);
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433 while (not peek) and (message=nil) and (not tv_compare(nowtv,threaddata.nexttimer)) do begin
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434 threaddata.waiting := true;
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435 structurelock.release;
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436 if (threaddata.nexttimer.tv_sec = TV_invalidtimebig.tv_sec) and (threaddata.nexttimer.tv_usec = TV_invalidtimebig.tv_usec) then begin
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437 threaddata.messageevent.waitfor(INFINITE);
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440 timeouttv := threaddata.nexttimer;
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441 timeoutms := (timeouttv.tv_sec * 1000)+(timeouttv.tv_usec div 1000);
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442 //i'm assuming the timeout is in milliseconds
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443 if (timeoutms > maxlongint) then timeoutms := maxlongint;
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444 threaddata.messageevent.waitfor(timeoutms);
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447 structurelock.acquire;
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448 threaddata.waiting := false;
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449 message := threaddata.messagequeue;
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450 gettimeofday(nowtv);
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452 if (message=nil) and tv_compare(nowtv,threaddata.nexttimer) then begin
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455 message := threaddata.messagequeue;
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456 if message <> nil then begin
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457 lpmsg := message.msg;
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458 if wremovemsg=PM_REMOVE then begin
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459 threaddata.messagequeue := message.next;
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465 deletethreaddataifunused(threaddata);
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467 structurelock.release;
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471 function GetMessage(var lpMsg: TMsg; hWnd: HWND; wMsgFilterMin, wMsgFilterMax: UINT): WINBOOL;
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473 result := getmessageinternal(lpmsg,hwnd,wmsgfiltermin,wmsgfiltermax,PM_REMOVE,false);
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476 function PeekMessage(var lpMsg: TMsg; hWnd: HWND; wMsgFilterMin, wMsgFilterMax, wRemoveMsg: UINT): WINBOOL;
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478 result := getmessageinternal(lpmsg,hwnd,wmsgfiltermin,wmsgfiltermax,PM_REMOVE,true);
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481 function SetEvent(hEvent:THevent):WINBOOL;
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487 function CreateEvent(lpEventAttributes:PSECURITYATTRIBUTES; bManualReset:WINBOOL; bInitialState:WINBOOL; lpName:pchar):tHevent;
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489 result := teventobject.create(lpeventattributes,bmanualreset,binitialstate,lpname);
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492 function terminatethread(threadhandle:tthreadid;dummy : integer) : boolean;
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494 tm : tthreadmanager;
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496 getthreadmanager(tm);
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497 tm.killthread(threadhandle);
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501 function waitforsingleevent(event:thevent;timeout:cardinal) : twaitresult;
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503 result := event.waitfor(timeout);
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506 procedure removefrombuffer(n : integer; var buffer:string);
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508 if n=length(buffer) then begin
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511 uniquestring(buffer);
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512 move(buffer[n+1],buffer[1],length(buffer)-n);
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513 setlength(buffer,length(buffer)-n);
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519 procedure available(sender:tobject;error:word);
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525 procedure tsc.available(sender:tobject;error:word);
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527 message : tmessageintransit;
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528 messagebytes : array[1..sizeof(tmessageintransit)] of char absolute message;
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531 //swriteln('received data on lcorelinkpipe');
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532 recvbuf := recvbuf + lcorelinkpiperecv.receivestr;
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533 while length(recvbuf) >= sizeof(tmessageintransit) do begin
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534 for i := 1 to sizeof(tmessageintransit) do begin
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535 messagebytes[i] := recvbuf[i];
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537 dispatchmessage(message.msg);
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539 removefrombuffer(sizeof(tmessageintransit),recvbuf);
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545 tm : tthreadmanager;
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546 threaddata : tthreaddata;
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547 pipeends : tfildes;
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550 structurelock := tcriticalsection.create;
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551 getthreadmanager(tm);
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552 threaddata := findthreaddata(tm.GetCurrentThreadId);
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553 threaddata.lcorethread := true;
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555 lcorelinkpipesend := pipeends[1];
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556 lcorelinkpiperecv := tlasio.create(nil);
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557 lcorelinkpiperecv.dup(pipeends[0]);
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558 lcorelinkpiperecv.ondataavailable := sc.available;
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563 lcorethreadtimers : thashtable;
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565 tltimerformsg = class(tltimer)
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569 procedure timer(sender : tobject);
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572 procedure tltimerformsg.timer(sender : tobject);
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576 ////swriteln('in tltimerformsg.timer');
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577 fillchar(msg,sizeof(msg),0);
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578 msg.message := WM_TIMER;
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582 dispatchmessage(msg);
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585 function SetTimer(ahWnd:HWND; nIDEvent:taddrint; uElapse:UINT; lpTimerFunc:tTIMERPROC):UINT;
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587 threaddata : tthreaddata;
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588 ltimer : tltimerformsg;
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589 tm : tthreadmanager;
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592 structurelock.acquire;
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594 window := findtree(@windows,inttostr(ahwnd));
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595 if window= nil then raise exception.create('invalid window');
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596 threaddata := findthreaddata(window.threadid);
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598 structurelock.release;
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600 if threaddata.lcorethread then begin
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601 getthreadmanager(tm);
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602 if tm.GetCurrentThreadId <> window.threadid then raise exception.create('timers on the lcore thread may only be added and removed from the lcore thread');
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603 if ahwnd = 0 then raise exception.create('timers on the lcore thread must be associated with a window handle');
\r
604 if @lptimerfunc <> nil then raise exception.create('seperate timer functions are not supported');
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606 //remove preexisting timer with same ID
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607 killtimer(ahwnd,nIDEvent);
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609 ltimer := tltimerformsg.create(nil);
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610 ltimer.interval := uelapse;
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611 ltimer.id := nidevent;
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612 ltimer.hwnd := ahwnd;
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613 ltimer.enabled := true;
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614 ltimer.ontimer := ltimer.timer;
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616 addtree(@lcorethreadtimers,inttostr(taddrint(ahwnd))+' '+inttostr(nIDEvent),ltimer);
\r
618 result := nidevent;
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620 raise exception.create('settimer not implemented for threads other than the lcore thread');
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624 function KillTimer(ahWnd:HWND; uIDEvent:taddrint):WINBOOL;
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626 threaddata : tthreaddata;
\r
627 ltimer : tltimerformsg;
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628 tm : tthreadmanager;
\r
631 structurelock.acquire;
\r
633 window := findtree(@windows,inttostr(ahwnd));
\r
634 if window= nil then raise exception.create('invalid window');
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635 threaddata := findthreaddata(window.threadid);
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637 structurelock.release;
\r
639 if threaddata.lcorethread then begin
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640 getthreadmanager(tm);
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641 if tm.GetCurrentThreadId <> window.threadid then raise exception.create('timers on the lcore thread may only be added and remove from the lcore thread');
\r
642 if ahwnd = 0 then raise exception.create('timers on the lcore thread must be associated with a window handle');
\r
643 ltimer := tltimerformsg(findtree(@lcorethreadtimers,inttostr(taddrint(ahwnd))+' '+inttostr(uIDEvent)));
\r
644 if ltimer <> nil then begin
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645 deltree(@lcorethreadtimers,inttostr(taddrint(ahwnd))+' '+inttostr(uIDEvent));
\r
652 raise exception.create('settimer not implemented for threads other than the lcore thread');
\r