1 /*
2 * Copyright (C) 2024 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 #ifndef _GNU_SOURCE
18 #define _GNU_SOURCE
19 #endif
20
21 #include "jni.h"
22
23 #include <errno.h>
24 #include <pthread.h>
25 #include <stdio.h>
26 #include <string.h>
27
Java_Main_printPthreadName(JNIEnv * env,jclass klass)28 extern "C" JNIEXPORT void JNICALL Java_Main_printPthreadName(
29 [[maybe_unused]] JNIEnv* env, [[maybe_unused]] jclass klass) {
30 constexpr size_t kBufSize = 20; // Thread names are at most 16 characters.
31 char name[kBufSize];
32 int ret = pthread_getname_np(pthread_self(), name, kBufSize);
33 if (ret == 0) {
34 printf("%s\n", name);
35 } else {
36 fprintf(stderr, "pthread_getname_np failed: %s\n", strerror(ret));
37 }
38 }
39