diff options
Diffstat (limited to 'xorg-server/Xext/sleepuntil.c')
| -rw-r--r-- | xorg-server/Xext/sleepuntil.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/xorg-server/Xext/sleepuntil.c b/xorg-server/Xext/sleepuntil.c new file mode 100644 index 000000000..f8cedbe6e --- /dev/null +++ b/xorg-server/Xext/sleepuntil.c @@ -0,0 +1,237 @@ +/* + * +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 */ + +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#include "sleepuntil.h" +#include <X11/X.h> +#include <X11/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)( + ClientPtr /* client */, + pointer /* closure */ + ); + + pointer closure; +} SertafiedRec, *SertafiedPtr; + +static SertafiedPtr pPending; +static RESTYPE SertafiedResType; +static Bool BlockHandlerRegistered; +static int SertafiedGeneration; + +static void ClientAwaken( + ClientPtr /* client */, + pointer /* closure */ +); +static int SertafiedDelete( + pointer /* value */, + XID /* id */ +); +static void SertafiedBlockHandler( + pointer /* data */, + OSTimePtr /* wt */, + pointer /* LastSelectMask */ +); +static void SertafiedWakeupHandler( + pointer /* data */, + int /* i */, + pointer /* LastSelectMask */ +); + +_X_EXPORT int +ClientSleepUntil (client, revive, notifyFunc, closure) + ClientPtr client; + TimeStamp *revive; + void (*notifyFunc)( + ClientPtr /* client */, + pointer /* closure */); + 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 delay; + 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; + delay = pReq->revive.milliseconds - now.milliseconds; + AdjustWaitForDelay (wt, delay); +} + +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; + } +} |