sync code with last improvements from OpenBSD

proto/xorgproto/include/X11/extensions/syncstr.h

@@ -0,0 +1,182 @@
+/*
+
+Copyright 1991, 1993, 1994, 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.
+
+*/
+
+/***********************************************************
+Copyright 1991,1993 by Digital Equipment Corporation, Maynard, Massachusetts,
+and Olivetti Research Limited, Cambridge, England.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the names of Digital or Olivetti
+not be used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL AND OLIVETTI DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS, IN NO EVENT SHALL THEY BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+
+******************************************************************/
+
+#ifndef _SYNCSTR_H_
+#define _SYNCSTR_H_
+
+#include <X11/extensions/syncproto.h>
+
+#ifdef _SYNC_SERVER
+
+#define CARD64 XSyncValue /* XXX temporary! need real 64 bit values for Alpha */
+
+typedef struct _SyncCounter {
+    ClientPtr		client;	/* Owning client. 0 for system counters */
+    XSyncCounter	id;		/* resource ID */
+    CARD64		value;		/* counter value */
+    struct _SyncTriggerList *pTriglist;	/* list of triggers */
+    Bool		beingDestroyed; /* in process of going away */
+    struct _SysCounterInfo *pSysCounterInfo; /* NULL if not a system counter */
+} SyncCounter;
+
+/*
+ * The System Counter interface
+ */
+
+typedef enum {
+    XSyncCounterNeverChanges,
+    XSyncCounterNeverIncreases,
+    XSyncCounterNeverDecreases,
+    XSyncCounterUnrestricted
+} SyncCounterType;
+
+typedef struct _SysCounterInfo {
+    char	*name;
+    CARD64	resolution;
+    CARD64	bracket_greater;
+    CARD64	bracket_less;
+    SyncCounterType counterType;  /* how can this counter change */
+    void        (*QueryValue)(
+			      pointer /*pCounter*/,
+			      CARD64 * /*freshvalue*/
+);
+    void	(*BracketValues)(
+				 pointer /*pCounter*/,
+				 CARD64 * /*lessthan*/,
+				 CARD64 * /*greaterthan*/
+);
+} SysCounterInfo;
+
+
+
+typedef struct _SyncTrigger {
+    SyncCounter *pCounter;
+    CARD64	wait_value;	/* wait value */
+    unsigned int value_type;     /* Absolute or Relative */
+    unsigned int test_type;	/* transition or Comparison type */
+    CARD64	test_value;	/* trigger event threshold value */
+    Bool	(*CheckTrigger)(
+				struct _SyncTrigger * /*pTrigger*/,
+				CARD64 /*newval*/
+				);
+    void	(*TriggerFired)(
+				struct _SyncTrigger * /*pTrigger*/
+				);
+    void	(*CounterDestroyed)(
+				struct _SyncTrigger * /*pTrigger*/
+				    );
+} SyncTrigger;
+
+typedef struct _SyncTriggerList {
+    SyncTrigger *pTrigger;
+    struct _SyncTriggerList *next;
+} SyncTriggerList;
+
+typedef struct _SyncAlarmClientList {
+    ClientPtr	client;
+    XID		delete_id;
+    struct _SyncAlarmClientList *next;
+} SyncAlarmClientList;
+
+typedef struct _SyncAlarm {
+    SyncTrigger trigger;
+    ClientPtr	client;
+    XSyncAlarm 	alarm_id;
+    CARD64	delta;
+    int		events;
+    int		state;
+    SyncAlarmClientList *pEventClients;
+} SyncAlarm;
+
+typedef struct {
+    ClientPtr	client;
+    CARD32 	delete_id;
+    int		num_waitconditions;
+} SyncAwaitHeader;
+
+typedef struct {
+    SyncTrigger trigger;
+    CARD64	event_threshold;
+    SyncAwaitHeader *pHeader;
+} SyncAwait;
+
+typedef union {
+    SyncAwaitHeader header;
+    SyncAwait	    await;
+} SyncAwaitUnion;
+
+
+extern pointer SyncCreateSystemCounter(
+    char *	/* name */,
+    CARD64  	/* initial_value */,
+    CARD64  	/* resolution */,
+    SyncCounterType /* change characterization */,
+    void        (* /*QueryValue*/ ) (
+        pointer /* pCounter */,
+        CARD64 * /* pValue_return */), /* XXX prototype */
+    void        (* /*BracketValues*/) (
+        pointer /* pCounter */,
+        CARD64 * /* pbracket_less */,
+        CARD64 * /* pbracket_greater */)
+);
+
+extern void SyncChangeCounter(
+    SyncCounter *	/* pCounter*/,
+    CARD64  		/* new_value */
+);
+
+extern void SyncDestroySystemCounter(
+    pointer pCounter
+);
+extern void InitServertime(void);
+
+#endif /* _SYNC_SERVER */
+
+#endif /* _SYNCSTR_H_ */