1 /*
2 * Copyright (C) 2010 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 "IoUtils"
18
19 #include "JNIHelp.h"
20 #include "JniConstants.h"
21 #include "NetworkUtilities.h"
22 #include "ScopedPrimitiveArray.h"
23
24 #include <errno.h>
25 #include <unistd.h>
26
IoUtils_close(JNIEnv * env,jclass,jobject fileDescriptor)27 static void IoUtils_close(JNIEnv* env, jclass, jobject fileDescriptor) {
28 int fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
29 jint rc = TEMP_FAILURE_RETRY(close(fd));
30 if (rc == -1) {
31 jniThrowIOException(env, errno);
32 }
33 jniSetFileDescriptorOfFD(env, fileDescriptor, -1);
34 }
35
IoUtils_getFd(JNIEnv * env,jclass,jobject fileDescriptor)36 static jint IoUtils_getFd(JNIEnv* env, jclass, jobject fileDescriptor) {
37 return jniGetFDFromFileDescriptor(env, fileDescriptor);
38 }
39
IoUtils_pipe(JNIEnv * env,jclass,jintArray javaFds)40 static void IoUtils_pipe(JNIEnv* env, jclass, jintArray javaFds) {
41 ScopedIntArrayRW fds(env, javaFds);
42 if (fds.get() == NULL) {
43 return;
44 }
45 int rc = pipe(&fds[0]);
46 if (rc == -1) {
47 jniThrowIOException(env, errno);
48 return;
49 }
50 }
51
IoUtils_setFd(JNIEnv * env,jclass,jobject fileDescriptor,jint newValue)52 static void IoUtils_setFd(JNIEnv* env, jclass, jobject fileDescriptor, jint newValue) {
53 return jniSetFileDescriptorOfFD(env, fileDescriptor, newValue);
54 }
55
IoUtils_setBlocking(JNIEnv * env,jclass,jobject fileDescriptor,jboolean blocking)56 static void IoUtils_setBlocking(JNIEnv* env, jclass, jobject fileDescriptor, jboolean blocking) {
57 int fd = jniGetFDFromFileDescriptor(env, fileDescriptor);
58 if (fd == -1) {
59 return;
60 }
61 if (!setBlocking(fd, blocking)) {
62 jniThrowIOException(env, errno);
63 }
64 }
65
66 static JNINativeMethod gMethods[] = {
67 NATIVE_METHOD(IoUtils, close, "(Ljava/io/FileDescriptor;)V"),
68 NATIVE_METHOD(IoUtils, getFd, "(Ljava/io/FileDescriptor;)I"),
69 NATIVE_METHOD(IoUtils, pipe, "([I)V"),
70 NATIVE_METHOD(IoUtils, setFd, "(Ljava/io/FileDescriptor;I)V"),
71 NATIVE_METHOD(IoUtils, setBlocking, "(Ljava/io/FileDescriptor;Z)V"),
72 };
register_libcore_io_IoUtils(JNIEnv * env)73 int register_libcore_io_IoUtils(JNIEnv* env) {
74 return jniRegisterNativeMethods(env, "libcore/io/IoUtils", gMethods, NELEM(gMethods));
75 }
76