1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "Fence"
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
//#define LOG_NDEBUG 0
// This is needed for stdint.h to define INT64_MAX in C++
#define __STDC_LIMIT_MACROS
#include <sync/sync.h>
#include <ui/Fence.h>
#include <unistd.h>
#include <utils/Log.h>
#include <utils/Trace.h>
namespace android {
const sp<Fence> Fence::NO_FENCE = sp<Fence>(new Fence);
Fence::Fence() :
mFenceFd(-1) {
}
Fence::Fence(int fenceFd) :
mFenceFd(fenceFd) {
}
Fence::~Fence() {
if (mFenceFd != -1) {
close(mFenceFd);
}
}
status_t Fence::wait(unsigned int timeout) {
ATRACE_CALL();
if (mFenceFd == -1) {
return NO_ERROR;
}
int err = sync_wait(mFenceFd, timeout);
return err < 0 ? -errno : status_t(NO_ERROR);
}
status_t Fence::waitForever(const char* logname) {
ATRACE_CALL();
if (mFenceFd == -1) {
return NO_ERROR;
}
unsigned int warningTimeout = 3000;
int err = sync_wait(mFenceFd, warningTimeout);
if (err < 0 && errno == ETIME) {
ALOGE("%s: fence %d didn't signal in %u ms", logname, mFenceFd,
warningTimeout);
err = sync_wait(mFenceFd, TIMEOUT_NEVER);
}
return err < 0 ? -errno : status_t(NO_ERROR);
}
sp<Fence> Fence::merge(const String8& name, const sp<Fence>& f1,
const sp<Fence>& f2) {
ATRACE_CALL();
int result;
// Merge the two fences. In the case where one of the fences is not a
// valid fence (e.g. NO_FENCE) we merge the one valid fence with itself so
// that a new fence with the given name is created.
if (f1->isValid() && f2->isValid()) {
result = sync_merge(name.string(), f1->mFenceFd, f2->mFenceFd);
} else if (f1->isValid()) {
result = sync_merge(name.string(), f1->mFenceFd, f1->mFenceFd);
} else if (f2->isValid()) {
result = sync_merge(name.string(), f2->mFenceFd, f2->mFenceFd);
} else {
return NO_FENCE;
}
if (result == -1) {
status_t err = -errno;
ALOGE("merge: sync_merge(\"%s\", %d, %d) returned an error: %s (%d)",
name.string(), f1->mFenceFd, f2->mFenceFd,
strerror(-err), err);
return NO_FENCE;
}
return sp<Fence>(new Fence(result));
}
int Fence::dup() const {
return ::dup(mFenceFd);
}
nsecs_t Fence::getSignalTime() const {
if (mFenceFd == -1) {
return -1;
}
struct sync_fence_info_data* finfo = sync_fence_info(mFenceFd);
if (finfo == NULL) {
ALOGE("sync_fence_info returned NULL for fd %d", mFenceFd);
return -1;
}
if (finfo->status != 1) {
sync_fence_info_free(finfo);
return INT64_MAX;
}
struct sync_pt_info* pinfo = NULL;
uint64_t timestamp = 0;
while ((pinfo = sync_pt_info(finfo, pinfo)) != NULL) {
if (pinfo->timestamp_ns > timestamp) {
timestamp = pinfo->timestamp_ns;
}
}
sync_fence_info_free(finfo);
return nsecs_t(timestamp);
}
size_t Fence::getFlattenedSize() const {
return 1;
}
size_t Fence::getFdCount() const {
return isValid() ? 1 : 0;
}
status_t Fence::flatten(void*& buffer, size_t& size, int*& fds, size_t& count) const {
if (size < getFlattenedSize() || count < getFdCount()) {
return NO_MEMORY;
}
FlattenableUtils::write(buffer, size, getFdCount());
if (isValid()) {
*fds++ = mFenceFd;
count--;
}
return NO_ERROR;
}
status_t Fence::unflatten(void const*& buffer, size_t& size, int const*& fds, size_t& count) {
if (mFenceFd != -1) {
// Don't unflatten if we already have a valid fd.
return INVALID_OPERATION;
}
if (size < 1) {
return NO_MEMORY;
}
size_t numFds;
FlattenableUtils::read(buffer, size, numFds);
if (numFds > 1) {
return BAD_VALUE;
}
if (count < numFds) {
return NO_MEMORY;
}
if (numFds) {
mFenceFd = *fds++;
count--;
}
return NO_ERROR;
}
} // namespace android
|
