present_fence.c revision 35c4bbdf 
1/*
2 * Copyright © 2013 Keith Packard
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission.  The copyright holders make no representations
11 * about the suitability of this software for any purpose.  It is provided "as
12 * is" without express or implied warranty.
13 *
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
20 * OF THIS SOFTWARE.
21 */
22
23#ifdef HAVE_XORG_CONFIG_H
24#include <xorg-config.h>
25#endif
26
27#include "present_priv.h"
28#include <gcstruct.h>
29#include <misync.h>
30#include <misyncstr.h>
31
32/*
33 * Wraps SyncFence objects so we can add a SyncTrigger to find out
34 * when the SyncFence gets destroyed and clean up appropriately
35 */
36
37struct present_fence {
38    SyncTrigger         trigger;
39    SyncFence           *fence;
40    void                (*callback)(void *param);
41    void                *param;
42};
43
44/*
45 * SyncTrigger callbacks
46 */
47static Bool
48present_fence_sync_check_trigger(SyncTrigger *trigger, XSyncValue oldval)
49{
50    struct present_fence        *present_fence = container_of(trigger, struct present_fence, trigger);
51
52    return present_fence->callback != NULL;
53}
54
55static void
56present_fence_sync_trigger_fired(SyncTrigger *trigger)
57{
58    struct present_fence        *present_fence = container_of(trigger, struct present_fence, trigger);
59
60    if (present_fence->callback)
61        (*present_fence->callback)(present_fence->param);
62}
63
64static void
65present_fence_sync_counter_destroyed(SyncTrigger *trigger)
66{
67    struct present_fence        *present_fence = container_of(trigger, struct present_fence, trigger);
68
69    present_fence->fence = NULL;
70}
71
72struct present_fence *
73present_fence_create(SyncFence *fence)
74{
75    struct present_fence        *present_fence;
76
77    present_fence = calloc (1, sizeof (struct present_fence));
78    if (!present_fence)
79        return NULL;
80
81    present_fence->fence = fence;
82    present_fence->trigger.pSync = (SyncObject *) fence;
83    present_fence->trigger.CheckTrigger = present_fence_sync_check_trigger;
84    present_fence->trigger.TriggerFired = present_fence_sync_trigger_fired;
85    present_fence->trigger.CounterDestroyed = present_fence_sync_counter_destroyed;
86
87    if (SyncAddTriggerToSyncObject(&present_fence->trigger) != Success) {
88        free (present_fence);
89        return NULL;
90    }
91    return present_fence;
92}
93
94void
95present_fence_destroy(struct present_fence *present_fence)
96{
97    if (present_fence) {
98        if (present_fence->fence)
99            SyncDeleteTriggerFromSyncObject(&present_fence->trigger);
100        free(present_fence);
101    }
102}
103
104void
105present_fence_set_triggered(struct present_fence *present_fence)
106{
107    if (present_fence)
108        if (present_fence->fence)
109            (*present_fence->fence->funcs.SetTriggered) (present_fence->fence);
110}
111
112Bool
113present_fence_check_triggered(struct present_fence *present_fence)
114{
115    if (!present_fence)
116        return TRUE;
117    if (!present_fence->fence)
118        return TRUE;
119    return (*present_fence->fence->funcs.CheckTriggered)(present_fence->fence);
120}
121
122void
123present_fence_set_callback(struct present_fence *present_fence,
124                           void (*callback) (void *param),
125                           void *param)
126{
127    present_fence->callback = callback;
128    present_fence->param = param;
129}
130
131XID
132present_fence_id(struct present_fence *present_fence)
133{
134    if (!present_fence)
135        return None;
136    if (!present_fence->fence)
137        return None;
138    return present_fence->fence->sync.id;
139}
140