1 /*
2 * Copyright (C) 2022 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "SyncFence"
18
19 #include <nativehelper/JNIHelp.h>
20 #include <ui/Fence.h>
21
22 #include "core_jni_helpers.h"
23 #include "jni.h"
24
25 using namespace android;
26
27 template <typename T>
toJlong(T * ptr)28 jlong toJlong(T* ptr) {
29 return static_cast<jlong>(reinterpret_cast<uintptr_t>(ptr));
30 }
31
32 template <typename T>
fromJlong(jlong jPtr)33 T* fromJlong(jlong jPtr) {
34 return reinterpret_cast<T*>(static_cast<uintptr_t>(jPtr));
35 }
36
destroyFence(Fence * fence)37 static void destroyFence(Fence* fence) {
38 fence->decStrong(0);
39 }
40
SyncFence_getDestructor(JNIEnv *,jobject)41 static jlong SyncFence_getDestructor(JNIEnv*, jobject) {
42 return toJlong(&destroyFence);
43 }
44
SyncFence_create(JNIEnv *,jobject,int fd)45 static jlong SyncFence_create(JNIEnv*, jobject, int fd) {
46 Fence* fence = new Fence(fd);
47 fence->incStrong(0);
48 return toJlong(fence);
49 }
50
SyncFence_isValid(JNIEnv *,jobject,jlong jPtr)51 static jboolean SyncFence_isValid(JNIEnv*, jobject, jlong jPtr) {
52 return fromJlong<Fence>(jPtr)->isValid();
53 }
54
SyncFence_getFd(JNIEnv *,jobject,jlong jPtr)55 static jint SyncFence_getFd(JNIEnv*, jobject, jlong jPtr) {
56 return fromJlong<Fence>(jPtr)->get();
57 }
58
SyncFence_wait(JNIEnv * env,jobject,jlong jPtr,jlong timeoutNanos)59 static jboolean SyncFence_wait(JNIEnv* env, jobject, jlong jPtr, jlong timeoutNanos) {
60 Fence* fence = fromJlong<Fence>(jPtr);
61 int err = fence->wait(timeoutNanos);
62 return err == OK;
63 }
64
SyncFence_getSignalTime(JNIEnv * env,jobject,jlong jPtr)65 static jlong SyncFence_getSignalTime(JNIEnv* env, jobject, jlong jPtr) {
66 return fromJlong<Fence>(jPtr)->getSignalTime();
67 }
68
69 // ----------------------------------------------------------------------------
70 // JNI Glue
71 // ----------------------------------------------------------------------------
72
73 const char* const kClassPathName = "android/hardware/SyncFence";
74
75 // clang-format off
76 static const JNINativeMethod gMethods[] = {
77 { "nGetDestructor", "()J", (void*) SyncFence_getDestructor },
78 { "nCreate", "(I)J", (void*) SyncFence_create },
79 { "nIsValid", "(J)Z", (void*) SyncFence_isValid },
80 { "nGetFd", "(J)I", (void*) SyncFence_getFd },
81 { "nWait", "(JJ)Z", (void*) SyncFence_wait },
82 { "nGetSignalTime", "(J)J", (void*) SyncFence_getSignalTime },
83 };
84 // clang-format on
85
register_android_hardware_SyncFence(JNIEnv * env)86 int register_android_hardware_SyncFence(JNIEnv* env) {
87 int err = RegisterMethodsOrDie(env, kClassPathName, gMethods, NELEM(gMethods));
88 return err;
89 }