2338d5c991
The smart scheduler itimer currently always fires after each request (which in turn causes the CPU to wake out of idle, burning precious power). Rather than doing this, just stop the timer before going into the select() portion of the WaitFor loop. It's a cheap system call, and it will only get called if there's no more commands batched up from the active fd. This change also allows some of the functions to be simplified; setitimer() will only fail if it's passed invalid data, and we don't do that... so make it void and remove all the conditional code that deals with failure. The change also allows us to remove a few variables that were used for housekeeping between the signal handler and the main loop. Signed-off-by: Keith Packard <keithp@koto.keithp.com>
213 lines
5.8 KiB
C
213 lines
5.8 KiB
C
/***********************************************************
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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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******************************************************************/
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#ifndef DIXSTRUCT_H
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#define DIXSTRUCT_H
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#include "dix.h"
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#include "resource.h"
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#include "cursor.h"
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#include "gc.h"
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#include "pixmap.h"
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#include <X11/Xmd.h>
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/*
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* direct-mapped hash table, used by resource manager to store
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* translation from client ids to server addresses.
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*/
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#ifdef DEBUG
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#define MAX_REQUEST_LOG 100
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#endif
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extern CallbackListPtr ClientStateCallback;
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typedef struct {
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ClientPtr client;
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xConnSetupPrefix *prefix;
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xConnSetup *setup;
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} NewClientInfoRec;
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typedef void (*ReplySwapPtr) (
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ClientPtr /* pClient */,
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int /* size */,
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void * /* pbuf */);
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extern void ReplyNotSwappd (
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ClientPtr /* pClient */,
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int /* size */,
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void * /* pbuf */);
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typedef enum {ClientStateInitial,
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ClientStateAuthenticating,
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ClientStateRunning,
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ClientStateRetained,
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ClientStateGone,
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ClientStateCheckingSecurity,
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ClientStateCheckedSecurity} ClientState;
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#ifdef XFIXES
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typedef struct _saveSet {
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struct _Window *windowPtr;
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Bool toRoot;
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Bool remap;
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} SaveSetElt;
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#define SaveSetWindow(ss) ((ss).windowPtr)
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#define SaveSetToRoot(ss) ((ss).toRoot)
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#define SaveSetRemap(ss) ((ss).remap)
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#define SaveSetAssignWindow(ss,w) ((ss).windowPtr = (w))
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#define SaveSetAssignToRoot(ss,tr) ((ss).toRoot = (tr))
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#define SaveSetAssignRemap(ss,rm) ((ss).remap = (rm))
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#else
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typedef struct _Window *SaveSetElt;
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#define SaveSetWindow(ss) (ss)
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#define SaveSetToRoot(ss) FALSE
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#define SaveSetRemap(ss) TRUE
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#define SaveSetAssignWindow(ss,w) ((ss) = (w))
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#define SaveSetAssignToRoot(ss,tr)
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#define SaveSetAssignRemap(ss,rm)
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#endif
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typedef struct _Client {
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int index;
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Mask clientAsMask;
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pointer requestBuffer;
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pointer osPrivate; /* for OS layer, including scheduler */
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Bool swapped;
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ReplySwapPtr pSwapReplyFunc;
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XID errorValue;
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int sequence;
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int closeDownMode;
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int clientGone;
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int noClientException; /* this client died or needs to be
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* killed */
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DrawablePtr lastDrawable;
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Drawable lastDrawableID;
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GCPtr lastGC;
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GContext lastGCID;
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SaveSetElt *saveSet;
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int numSaved;
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pointer screenPrivate[MAXSCREENS];
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int (**requestVector) (
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ClientPtr /* pClient */);
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CARD32 req_len; /* length of current request */
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Bool big_requests; /* supports large requests */
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int priority;
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ClientState clientState;
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DevUnion *devPrivates;
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#ifdef XKB
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unsigned short xkbClientFlags;
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unsigned short mapNotifyMask;
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unsigned short newKeyboardNotifyMask;
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unsigned short vMajor,vMinor;
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KeyCode minKC,maxKC;
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#endif
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#ifdef DEBUG
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unsigned char requestLog[MAX_REQUEST_LOG];
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int requestLogIndex;
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#endif
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unsigned long replyBytesRemaining;
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#ifdef XAPPGROUP
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struct _AppGroupRec* appgroup;
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#endif
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struct _FontResolution * (*fontResFunc) ( /* no need for font.h */
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ClientPtr /* pClient */,
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int * /* num */);
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#ifdef SMART_SCHEDULE
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int smart_priority;
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long smart_start_tick;
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long smart_stop_tick;
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long smart_check_tick;
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#endif
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} ClientRec;
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#ifdef SMART_SCHEDULE
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/*
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* Scheduling interface
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*/
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extern long SmartScheduleTime;
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extern long SmartScheduleInterval;
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extern long SmartScheduleSlice;
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extern long SmartScheduleMaxSlice;
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extern Bool SmartScheduleDisable;
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extern void SmartScheduleStartTimer(void);
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extern void SmartScheduleStopTimer(void);
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#define SMART_MAX_PRIORITY (20)
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#define SMART_MIN_PRIORITY (-20)
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extern Bool SmartScheduleInit(void);
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#endif
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/* This prototype is used pervasively in Xext, dix */
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#define DISPATCH_PROC(func) int func(ClientPtr /* client */)
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typedef struct _WorkQueue {
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struct _WorkQueue *next;
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Bool (*function) (
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ClientPtr /* pClient */,
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pointer /* closure */
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);
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ClientPtr client;
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pointer closure;
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} WorkQueueRec;
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extern TimeStamp currentTime;
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extern TimeStamp lastDeviceEventTime;
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extern int CompareTimeStamps(
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TimeStamp /*a*/,
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TimeStamp /*b*/);
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extern TimeStamp ClientTimeToServerTime(CARD32 /*c*/);
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typedef struct _CallbackRec {
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CallbackProcPtr proc;
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pointer data;
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Bool deleted;
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struct _CallbackRec *next;
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} CallbackRec, *CallbackPtr;
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typedef struct _CallbackList {
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CallbackFuncsRec funcs;
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int inCallback;
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Bool deleted;
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int numDeleted;
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CallbackPtr list;
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} CallbackListRec;
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/* proc vectors */
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extern int (* InitialVector[3]) (ClientPtr /*client*/);
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extern int (* ProcVector[256]) (ClientPtr /*client*/);
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extern int (* SwappedProcVector[256]) (ClientPtr /*client*/);
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extern ReplySwapPtr ReplySwapVector[256];
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extern int ProcBadRequest(ClientPtr /*client*/);
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#endif /* DIXSTRUCT_H */
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