sync code with last improvements from OpenBSD

2023-08-28 05:57:34 +00:00 · 2023-08-28 05:57:34 +00:00 · 88965415ff
commit 88965415ff
26235 changed files with 29195616 additions and 0 deletions
--- a/xserver/miext/sync/misync.c
+++ b/xserver/miext/sync/misync.c
@ -0,0 +1,191 @@
+/*
+ * 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
+
+#include "scrnintstr.h"
+#include "misync.h"
+#include "misyncstr.h"
+
+DevPrivateKeyRec miSyncScreenPrivateKey;
+
+/* Default implementations of the sync screen functions */
+void
+miSyncScreenCreateFence(ScreenPtr pScreen, SyncFence * pFence,
+                        Bool initially_triggered)
+{
+    (void) pScreen;
+
+    pFence->triggered = initially_triggered;
+}
+
+void
+miSyncScreenDestroyFence(ScreenPtr pScreen, SyncFence * pFence)
+{
+    (void) pScreen;
+    (void) pFence;
+}
+
+/* Default implementations of the per-object functions */
+void
+miSyncFenceSetTriggered(SyncFence * pFence)
+{
+    pFence->triggered = TRUE;
+}
+
+void
+miSyncFenceReset(SyncFence * pFence)
+{
+    pFence->triggered = FALSE;
+}
+
+Bool
+miSyncFenceCheckTriggered(SyncFence * pFence)
+{
+    return pFence->triggered;
+}
+
+void
+miSyncFenceAddTrigger(SyncTrigger * pTrigger)
+{
+    (void) pTrigger;
+
+    return;
+}
+
+void
+miSyncFenceDeleteTrigger(SyncTrigger * pTrigger)
+{
+    (void) pTrigger;
+
+    return;
+}
+
+/* Machine independent portion of the fence sync object implementation */
+void
+miSyncInitFence(ScreenPtr pScreen, SyncFence * pFence, Bool initially_triggered)
+{
+    SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+
+    static const SyncFenceFuncsRec miSyncFenceFuncs = {
+        &miSyncFenceSetTriggered,
+        &miSyncFenceReset,
+        &miSyncFenceCheckTriggered,
+        &miSyncFenceAddTrigger,
+        &miSyncFenceDeleteTrigger
+    };
+
+    pFence->pScreen = pScreen;
+    pFence->funcs = miSyncFenceFuncs;
+
+    pScreenPriv->funcs.CreateFence(pScreen, pFence, initially_triggered);
+
+    pFence->sync.initialized = TRUE;
+}
+
+void
+miSyncDestroyFence(SyncFence * pFence)
+{
+    pFence->sync.beingDestroyed = TRUE;
+
+    if (pFence->sync.initialized) {
+        ScreenPtr pScreen = pFence->pScreen;
+        SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+        SyncTriggerList *ptl, *pNext;
+
+        /* tell all the fence's triggers that the counter has been destroyed */
+        for (ptl = pFence->sync.pTriglist; ptl; ptl = pNext) {
+            (*ptl->pTrigger->CounterDestroyed) (ptl->pTrigger);
+            pNext = ptl->next;
+            free(ptl); /* destroy the trigger list as we go */
+        }
+
+        pScreenPriv->funcs.DestroyFence(pScreen, pFence);
+    }
+
+    dixFreeObjectWithPrivates(pFence, PRIVATE_SYNC_FENCE);
+}
+
+void
+miSyncTriggerFence(SyncFence * pFence)
+{
+    SyncTriggerList *ptl, *pNext;
+
+    pFence->funcs.SetTriggered(pFence);
+
+    /* run through triggers to see if any fired */
+    for (ptl = pFence->sync.pTriglist; ptl; ptl = pNext) {
+        pNext = ptl->next;
+        if ((*ptl->pTrigger->CheckTrigger) (ptl->pTrigger, 0))
+            (*ptl->pTrigger->TriggerFired) (ptl->pTrigger);
+    }
+}
+
+SyncScreenFuncsPtr
+miSyncGetScreenFuncs(ScreenPtr pScreen)
+{
+    SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+
+    return &pScreenPriv->funcs;
+}
+
+static Bool
+SyncCloseScreen(ScreenPtr pScreen)
+{
+    SyncScreenPrivPtr pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+
+    pScreen->CloseScreen = pScreenPriv->CloseScreen;
+
+    return (*pScreen->CloseScreen) (pScreen);
+}
+
+Bool
+miSyncSetup(ScreenPtr pScreen)
+{
+    SyncScreenPrivPtr pScreenPriv;
+
+    static const SyncScreenFuncsRec miSyncScreenFuncs = {
+        &miSyncScreenCreateFence,
+        &miSyncScreenDestroyFence
+    };
+
+    if (!dixPrivateKeyRegistered(&miSyncScreenPrivateKey)) {
+        if (!dixRegisterPrivateKey(&miSyncScreenPrivateKey, PRIVATE_SCREEN,
+                                   sizeof(SyncScreenPrivRec)))
+            return FALSE;
+    }
+
+    pScreenPriv = SYNC_SCREEN_PRIV(pScreen);
+
+    if (!pScreenPriv->funcs.CreateFence) {
+        pScreenPriv->funcs = miSyncScreenFuncs;
+
+        /* Wrap CloseScreen to clean up */
+        pScreenPriv->CloseScreen = pScreen->CloseScreen;
+        pScreen->CloseScreen = SyncCloseScreen;
+    }
+
+    return TRUE;
+}