sync code with last improvements from OpenBSD

xserver/miext/sync/misyncstr.h

@@ -0,0 +1,95 @@
+/*
+ * Copyright © 2010 NVIDIA Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifndef _MISYNCSTR_H_
+#define _MISYNCSTR_H_
+
+#include <stdint.h>
+#include "dix.h"
+#include "misync.h"
+#include "scrnintstr.h"
+#include <X11/extensions/syncconst.h>
+
+/* Sync object types */
+#define SYNC_COUNTER		0
+#define SYNC_FENCE		1
+
+struct _SyncObject {
+    ClientPtr client;           /* Owning client. 0 for system counters */
+    struct _SyncTriggerList *pTriglist; /* list of triggers */
+    XID id;                     /* resource ID */
+    unsigned char type;         /* SYNC_* */
+    unsigned char initialized;  /* FALSE if created but not initialized */
+    Bool beingDestroyed;        /* in process of going away */
+};
+
+typedef struct _SyncCounter {
+    SyncObject sync;            /* Common sync object data */
+    int64_t value;              /* counter value */
+    struct _SysCounterInfo *pSysCounterInfo; /* NULL if not a system counter */
+} SyncCounter;
+
+struct _SyncFence {
+    SyncObject sync;            /* Common sync object data */
+    ScreenPtr pScreen;          /* Screen of this fence object */
+    SyncFenceFuncsRec funcs;    /* Funcs for performing ops on fence */
+    Bool triggered;             /* fence state */
+    PrivateRec *devPrivates;    /* driver-specific per-fence data */
+};
+
+struct _SyncTrigger {
+    SyncObject *pSync;
+    int64_t wait_value;         /* wait value */
+    unsigned int value_type;    /* Absolute or Relative */
+    unsigned int test_type;     /* transition or Comparison type */
+    int64_t test_value;         /* trigger event threshold value */
+    Bool (*CheckTrigger)(struct _SyncTrigger *pTrigger,
+                         int64_t newval);
+    void (*TriggerFired)(struct _SyncTrigger *pTrigger);
+    void (*CounterDestroyed)(struct _SyncTrigger *pTrigger);
+};
+
+typedef struct _SyncTriggerList {
+    SyncTrigger *pTrigger;
+    struct _SyncTriggerList *next;
+} SyncTriggerList;
+
+extern DevPrivateKeyRec miSyncScreenPrivateKey;
+
+#define SYNC_SCREEN_PRIV(pScreen) 				\
+    (SyncScreenPrivPtr) dixLookupPrivate(&pScreen->devPrivates,	\
+					 &miSyncScreenPrivateKey)
+
+typedef struct _syncScreenPriv {
+    /* Wrappable sync-specific screen functions */
+    SyncScreenFuncsRec funcs;
+
+    /* Wrapped screen functions */
+    CloseScreenProcPtr CloseScreen;
+} SyncScreenPrivRec, *SyncScreenPrivPtr;
+
+#endif                          /* _MISYNCSTR_H_ */