/* * $Xorg: sleepuntil.c,v 1.4 2001/02/09 02:04:33 xorgcvs Exp $ * Copyright 1992, 1998 The Open Group Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of The Open Group shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from The Open Group. * * Author: Keith Packard, MIT X Consortium */ /* dixsleep.c - implement millisecond timeouts for X clients */ #include "X.h" #include "Xmd.h" #include "misc.h" #include "windowstr.h" #include "dixstruct.h" #include "pixmapstr.h" #include "scrnintstr.h" typedef struct _Sertafied { struct _Sertafied *next; TimeStamp revive; ClientPtr pClient; XID id; void (*notifyFunc)(); pointer closure; } SertafiedRec, *SertafiedPtr; static SertafiedPtr pPending; static RESTYPE SertafiedResType; static Bool BlockHandlerRegistered; static int SertafiedGeneration; static void ClientAwaken(); static int SertafiedDelete(); static void SertafiedBlockHandler(); static void SertafiedWakeupHandler(); ClientSleepUntil (client, revive, notifyFunc, closure) ClientPtr client; TimeStamp *revive; void (*notifyFunc)(); pointer closure; { SertafiedPtr pRequest, pReq, pPrev; if (SertafiedGeneration != serverGeneration) { SertafiedResType = CreateNewResourceType (SertafiedDelete); if (!SertafiedResType) return FALSE; SertafiedGeneration = serverGeneration; BlockHandlerRegistered = FALSE; } pRequest = (SertafiedPtr) xalloc (sizeof (SertafiedRec)); if (!pRequest) return FALSE; pRequest->pClient = client; pRequest->revive = *revive; pRequest->id = FakeClientID (client->index); pRequest->closure = closure; if (!BlockHandlerRegistered) { if (!RegisterBlockAndWakeupHandlers (SertafiedBlockHandler, SertafiedWakeupHandler, (pointer) 0)) { xfree (pRequest); return FALSE; } BlockHandlerRegistered = TRUE; } pRequest->notifyFunc = 0; if (!AddResource (pRequest->id, SertafiedResType, (pointer) pRequest)) return FALSE; if (!notifyFunc) notifyFunc = ClientAwaken; pRequest->notifyFunc = notifyFunc; /* Insert into time-ordered queue, with earliest activation time coming first. */ pPrev = 0; for (pReq = pPending; pReq; pReq = pReq->next) { if (CompareTimeStamps (pReq->revive, *revive) == LATER) break; pPrev = pReq; } if (pPrev) pPrev->next = pRequest; else pPending = pRequest; pRequest->next = pReq; IgnoreClient (client); return TRUE; } static void ClientAwaken (client, closure) ClientPtr client; pointer closure; { if (!client->clientGone) AttendClient (client); } static int SertafiedDelete (value, id) pointer value; XID id; { SertafiedPtr pRequest = (SertafiedPtr)value; SertafiedPtr pReq, pPrev; pPrev = 0; for (pReq = pPending; pReq; pPrev = pReq, pReq = pReq->next) if (pReq == pRequest) { if (pPrev) pPrev->next = pReq->next; else pPending = pReq->next; break; } if (pRequest->notifyFunc) (*pRequest->notifyFunc) (pRequest->pClient, pRequest->closure); xfree (pRequest); return TRUE; } static void SertafiedBlockHandler (data, wt, LastSelectMask) pointer data; /* unused */ OSTimePtr wt; /* wait time */ pointer LastSelectMask; { SertafiedPtr pReq, pNext; unsigned long newdelay, olddelay; TimeStamp now; if (!pPending) return; now.milliseconds = GetTimeInMillis (); now.months = currentTime.months; if ((int) (now.milliseconds - currentTime.milliseconds) < 0) now.months++; for (pReq = pPending; pReq; pReq = pNext) { pNext = pReq->next; if (CompareTimeStamps (pReq->revive, now) == LATER) break; FreeResource (pReq->id, RT_NONE); /* AttendClient() may have been called via the resource delete * function so a client may have input to be processed and so * set delay to 0 to prevent blocking in WaitForSomething(). */ AdjustWaitForDelay (wt, 0); } pReq = pPending; if (!pReq) return; newdelay = pReq->revive.milliseconds - now.milliseconds; AdjustWaitForDelay (wt, newdelay); } static void SertafiedWakeupHandler (data, i, LastSelectMask) pointer data; int i; pointer LastSelectMask; { SertafiedPtr pReq, pNext; TimeStamp now; now.milliseconds = GetTimeInMillis (); now.months = currentTime.months; if ((int) (now.milliseconds - currentTime.milliseconds) < 0) now.months++; for (pReq = pPending; pReq; pReq = pNext) { pNext = pReq->next; if (CompareTimeStamps (pReq->revive, now) == LATER) break; FreeResource (pReq->id, RT_NONE); } if (!pPending) { RemoveBlockAndWakeupHandlers (SertafiedBlockHandler, SertafiedWakeupHandler, (pointer) 0); BlockHandlerRegistered = FALSE; } }