1 /*
2 * Copyright (C) 2020 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 #include <android/file_descriptor_jni.h>
18
19 #include <stddef.h>
20
21 #define LOG_TAG "file_descriptor_jni"
22 #include "ALog-priv.h"
23
24 #include "JniConstants.h"
25
EnsureArgumentIsFileDescriptor(JNIEnv * env,jobject instance)26 static void EnsureArgumentIsFileDescriptor(JNIEnv* env, jobject instance) {
27 ALOG_ALWAYS_FATAL_IF(instance == NULL, "FileDescriptor is NULL");
28 jclass jifd = JniConstants_FileDescriptorClass(env);
29 ALOG_ALWAYS_FATAL_IF(!(*env)->IsInstanceOf(env, instance, jifd),
30 "Argument is not a FileDescriptor");
31 }
32
AFileDescriptor_create(JNIEnv * env)33 JNIEXPORT _Nullable jobject AFileDescriptor_create(JNIEnv* env) {
34 return (*env)->NewObject(env,
35 JniConstants_FileDescriptorClass(env),
36 JniConstants_FileDescriptor_init(env));
37 }
38
AFileDescriptor_getFD(JNIEnv * env,jobject fileDescriptor)39 JNIEXPORT int AFileDescriptor_getFD(JNIEnv* env, jobject fileDescriptor) {
40 EnsureArgumentIsFileDescriptor(env, fileDescriptor);
41 return (*env)->GetIntField(env, fileDescriptor, JniConstants_FileDescriptor_descriptor(env));
42 }
43
AFileDescriptor_setFD(JNIEnv * env,jobject fileDescriptor,int fd)44 JNIEXPORT void AFileDescriptor_setFD(JNIEnv* env, jobject fileDescriptor, int fd) {
45 EnsureArgumentIsFileDescriptor(env, fileDescriptor);
46 (*env)->SetIntField(env, fileDescriptor, JniConstants_FileDescriptor_descriptor(env), fd);
47 }
48