netty5/transport-native-unix-common/src/main/c/netty_unix.c
Norman Maurer 5b41f3d25b
Ensure native methods for unix-native-common are only registered once. (#10932)
Motiviation:

We need to ensure we only register the methods for unix-native-common once as otherwise it may have strange side-effects.

Modifications:

- Add extra method that should be called to signal that we need to register the methods. The registration will only happen once.
- Adjust code to make use of it.

Result:

No more problems due incorrect registration of these methods.
2021-01-14 17:52:04 +01:00

86 lines
2.7 KiB
C

/*
* Copyright 2020 The Netty Project
*
* The Netty Project licenses this file to you 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:
*
* https://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.
*/
#include "netty_unix_jni.h"
#include "netty_unix.h"
#include "netty_unix_buffer.h"
#include "netty_unix_errors.h"
#include "netty_unix_filedescriptor.h"
#include "netty_unix_limits.h"
#include "netty_unix_socket.h"
#include "netty_unix_util.h"
jint netty_unix_register(JNIEnv* env, const char* packagePrefix) {
int limitsOnLoadCalled = 0;
int errorsOnLoadCalled = 0;
int filedescriptorOnLoadCalled = 0;
int socketOnLoadCalled = 0;
int bufferOnLoadCalled = 0;
// Load all c modules that we depend upon
if (netty_unix_limits_JNI_OnLoad(env, packagePrefix) == JNI_ERR) {
goto error;
}
limitsOnLoadCalled = 1;
if (netty_unix_errors_JNI_OnLoad(env, packagePrefix) == JNI_ERR) {
goto error;
}
errorsOnLoadCalled = 1;
if (netty_unix_filedescriptor_JNI_OnLoad(env, packagePrefix) == JNI_ERR) {
goto error;
}
filedescriptorOnLoadCalled = 1;
if (netty_unix_socket_JNI_OnLoad(env, packagePrefix) == JNI_ERR) {
goto error;
}
socketOnLoadCalled = 1;
if (netty_unix_buffer_JNI_OnLoad(env, packagePrefix) == JNI_ERR) {
goto error;
}
bufferOnLoadCalled = 1;
return NETTY_JNI_UTIL_JNI_VERSION;
error:
if (limitsOnLoadCalled == 1) {
netty_unix_limits_JNI_OnUnLoad(env, packagePrefix);
}
if (errorsOnLoadCalled == 1) {
netty_unix_errors_JNI_OnUnLoad(env, packagePrefix);
}
if (filedescriptorOnLoadCalled == 1) {
netty_unix_filedescriptor_JNI_OnUnLoad(env, packagePrefix);
}
if (socketOnLoadCalled == 1) {
netty_unix_socket_JNI_OnUnLoad(env, packagePrefix);
}
if (bufferOnLoadCalled == 1) {
netty_unix_buffer_JNI_OnUnLoad(env, packagePrefix);
}
return JNI_ERR;
}
void netty_unix_unregister(JNIEnv* env, const char* packagePrefix) {
netty_unix_limits_JNI_OnUnLoad(env, packagePrefix);
netty_unix_errors_JNI_OnUnLoad(env, packagePrefix);
netty_unix_filedescriptor_JNI_OnUnLoad(env, packagePrefix);
netty_unix_socket_JNI_OnUnLoad(env, packagePrefix);
netty_unix_buffer_JNI_OnUnLoad(env, packagePrefix);
}