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ve.pulsar-client-all.3.3.1.5.source-code.netty_unix_errors.c Maven / Gradle / Ivy
/*
* Copyright 2015 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
#include
#include
#include
#include "netty_unix_errors.h"
#include "netty_unix_jni.h"
#include "netty_unix_util.h"
#include "netty_jni_util.h"
#define ERRORS_CLASSNAME "io/netty/channel/unix/ErrorsStaticallyReferencedJniMethods"
static jweak channelExceptionClassWeak = NULL;
static jclass oomErrorClass = NULL;
static jclass runtimeExceptionClass = NULL;
static jclass ioExceptionClass = NULL;
static jclass portUnreachableExceptionClass = NULL;
static jclass closedChannelExceptionClass = NULL;
static jmethodID closedChannelExceptionMethodId = NULL;
/**
Our `strerror_r` wrapper makes sure that the function is XSI compliant,
even on platforms where the GNU variant is exposed.
Note: `strerrbuf` must be initialized to all zeros prior to calling this function.
XSI or GNU functions do not have such a requirement, but our wrappers do.
*/
#if (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600 || __APPLE__) && ! _GNU_SOURCE
static inline int strerror_r_xsi(int errnum, char *strerrbuf, size_t buflen) {
return strerror_r(errnum, strerrbuf, buflen);
}
#else
static inline int strerror_r_xsi(int errnum, char *strerrbuf, size_t buflen) {
char* tmp = strerror_r(errnum, strerrbuf, buflen);
if (strerrbuf[0] == '\0') {
// Our output buffer was not used. Copy from tmp.
strncpy(strerrbuf, tmp, buflen - 1); // Use (buflen - 1) to avoid overwriting terminating \0.
}
if (errno != 0) {
return -1;
}
return 0;
}
#endif
/** Notice: every usage of exceptionMessage needs to release the allocated memory for the sequence of char */
static char* exceptionMessage(char* msg, int error) {
if (error < 0) {
// Error may be negative because some functions return negative values. We should make sure it is always
// positive when passing to standard library functions.
error = -error;
}
int buflen = 32;
char* strerrbuf = NULL;
int result = 0;
do {
buflen = buflen * 2;
if (buflen >= 2048) {
break; // Limit buffer growth.
}
if (strerrbuf != NULL) {
free(strerrbuf);
}
strerrbuf = calloc(buflen, sizeof(char));
result = strerror_r_xsi(error, strerrbuf, buflen);
if (result == -1) {
result = errno;
}
} while (result == ERANGE);
char* combined = netty_jni_util_prepend(msg, strerrbuf);
free(strerrbuf);
return combined;
}
// Exported C methods
void netty_unix_errors_throwRuntimeException(JNIEnv* env, char* message) {
(*env)->ThrowNew(env, runtimeExceptionClass, message);
}
void netty_unix_errors_throwRuntimeExceptionErrorNo(JNIEnv* env, char* message, int errorNumber) {
char* allocatedMessage = exceptionMessage(message, errorNumber);
if (allocatedMessage == NULL) {
return;
}
(*env)->ThrowNew(env, runtimeExceptionClass, allocatedMessage);
free(allocatedMessage);
}
void netty_unix_errors_throwChannelExceptionErrorNo(JNIEnv* env, char* message, int errorNumber) {
jclass channelExceptionClass = NULL;
char* allocatedMessage = exceptionMessage(message, errorNumber);
if (allocatedMessage == NULL) {
return;
}
NETTY_JNI_UTIL_NEW_LOCAL_FROM_WEAK(env, channelExceptionClass, channelExceptionClassWeak, done);
(*env)->ThrowNew(env, channelExceptionClass, allocatedMessage);
done:
NETTY_JNI_UTIL_DELETE_LOCAL(env, channelExceptionClass);
free(allocatedMessage);
}
void netty_unix_errors_throwIOException(JNIEnv* env, char* message) {
(*env)->ThrowNew(env, ioExceptionClass, message);
}
void netty_unix_errors_throwPortUnreachableException(JNIEnv* env, char* message) {
(*env)->ThrowNew(env, portUnreachableExceptionClass, message);
}
void netty_unix_errors_throwIOExceptionErrorNo(JNIEnv* env, char* message, int errorNumber) {
char* allocatedMessage = exceptionMessage(message, errorNumber);
if (allocatedMessage == NULL) {
return;
}
(*env)->ThrowNew(env, ioExceptionClass, allocatedMessage);
free(allocatedMessage);
}
void netty_unix_errors_throwClosedChannelException(JNIEnv* env) {
jobject exception = (*env)->NewObject(env, closedChannelExceptionClass, closedChannelExceptionMethodId);
if (exception == NULL) {
return;
}
(*env)->Throw(env, exception);
}
void netty_unix_errors_throwOutOfMemoryError(JNIEnv* env) {
(*env)->ThrowNew(env, oomErrorClass, "");
}
// JNI Registered Methods Begin
static jint netty_unix_errors_errnoENOENT(JNIEnv* env, jclass clazz) {
return ENOENT;
}
static jint netty_unix_errors_errnoENOTCONN(JNIEnv* env, jclass clazz) {
return ENOTCONN;
}
static jint netty_unix_errors_errnoEBADF(JNIEnv* env, jclass clazz) {
return EBADF;
}
static jint netty_unix_errors_errnoEPIPE(JNIEnv* env, jclass clazz) {
return EPIPE;
}
static jint netty_unix_errors_errnoECONNRESET(JNIEnv* env, jclass clazz) {
return ECONNRESET;
}
static jint netty_unix_errors_errnoEAGAIN(JNIEnv* env, jclass clazz) {
return EAGAIN;
}
static jint netty_unix_errors_errnoEWOULDBLOCK(JNIEnv* env, jclass clazz) {
return EWOULDBLOCK;
}
static jint netty_unix_errors_errnoEINPROGRESS(JNIEnv* env, jclass clazz) {
return EINPROGRESS;
}
static jint netty_unix_errors_errorECONNREFUSED(JNIEnv* env, jclass clazz) {
return ECONNREFUSED;
}
static jint netty_unix_errors_errorEISCONN(JNIEnv* env, jclass clazz) {
return EISCONN;
}
static jint netty_unix_errors_errorEALREADY(JNIEnv* env, jclass clazz) {
return EALREADY;
}
static jint netty_unix_errors_errorENETUNREACH(JNIEnv* env, jclass clazz) {
return ENETUNREACH;
}
static jint netty_unix_errors_errorEHOSTUNREACH(JNIEnv* env, jclass clazz) {
return EHOSTUNREACH;
}
static jstring netty_unix_errors_strError(JNIEnv* env, jclass clazz, jint error) {
return (*env)->NewStringUTF(env, strerror(error));
}
// JNI Registered Methods End
// JNI Method Registration Table Begin
static const JNINativeMethod statically_referenced_fixed_method_table[] = {
{ "errnoENOENT", "()I", (void *) netty_unix_errors_errnoENOENT },
{ "errnoENOTCONN", "()I", (void *) netty_unix_errors_errnoENOTCONN },
{ "errnoEBADF", "()I", (void *) netty_unix_errors_errnoEBADF },
{ "errnoEPIPE", "()I", (void *) netty_unix_errors_errnoEPIPE },
{ "errnoECONNRESET", "()I", (void *) netty_unix_errors_errnoECONNRESET },
{ "errnoEAGAIN", "()I", (void *) netty_unix_errors_errnoEAGAIN },
{ "errnoEWOULDBLOCK", "()I", (void *) netty_unix_errors_errnoEWOULDBLOCK },
{ "errnoEINPROGRESS", "()I", (void *) netty_unix_errors_errnoEINPROGRESS },
{ "errorECONNREFUSED", "()I", (void *) netty_unix_errors_errorECONNREFUSED },
{ "errorEISCONN", "()I", (void *) netty_unix_errors_errorEISCONN },
{ "errorEALREADY", "()I", (void *) netty_unix_errors_errorEALREADY },
{ "errorENETUNREACH", "()I", (void *) netty_unix_errors_errorENETUNREACH },
{ "errorEHOSTUNREACH", "()I", (void *) netty_unix_errors_errorEHOSTUNREACH },
{ "strError", "(I)Ljava/lang/String;", (void *) netty_unix_errors_strError }
};
static const jint statically_referenced_fixed_method_table_size = sizeof(statically_referenced_fixed_method_table) / sizeof(statically_referenced_fixed_method_table[0]);
// JNI Method Registration Table End
// IMPORTANT: If you add any NETTY_JNI_UTIL_LOAD_CLASS or NETTY_JNI_UTIL_FIND_CLASS calls you also need to update
// Unix to reflect that.
jint netty_unix_errors_JNI_OnLoad(JNIEnv* env, const char* packagePrefix) {
char* nettyClassName = NULL;
jclass channelExceptionClass = NULL;
// We must register the statically referenced methods first!
if (netty_jni_util_register_natives(env,
packagePrefix,
ERRORS_CLASSNAME,
statically_referenced_fixed_method_table,
statically_referenced_fixed_method_table_size) != 0) {
return JNI_ERR;
}
NETTY_JNI_UTIL_LOAD_CLASS(env, oomErrorClass, "java/lang/OutOfMemoryError", error);
NETTY_JNI_UTIL_LOAD_CLASS(env, runtimeExceptionClass, "java/lang/RuntimeException", error);
NETTY_JNI_UTIL_PREPEND(packagePrefix, "io/netty/channel/ChannelException", nettyClassName, error);
NETTY_JNI_UTIL_LOAD_CLASS_WEAK(env, channelExceptionClassWeak, nettyClassName, error);
NETTY_JNI_UTIL_NEW_LOCAL_FROM_WEAK(env, channelExceptionClass, channelExceptionClassWeak, error);
netty_jni_util_free_dynamic_name(&nettyClassName);
NETTY_JNI_UTIL_LOAD_CLASS(env, closedChannelExceptionClass, "java/nio/channels/ClosedChannelException", error);
NETTY_JNI_UTIL_GET_METHOD(env, closedChannelExceptionClass, closedChannelExceptionMethodId, "", "()V", error);
NETTY_JNI_UTIL_LOAD_CLASS(env, ioExceptionClass, "java/io/IOException", error);
NETTY_JNI_UTIL_LOAD_CLASS(env, portUnreachableExceptionClass, "java/net/PortUnreachableException", error);
NETTY_JNI_UTIL_DELETE_LOCAL(env, channelExceptionClass);
return NETTY_JNI_UTIL_JNI_VERSION;
error:
free(nettyClassName);
NETTY_JNI_UTIL_DELETE_LOCAL(env, channelExceptionClass);
return JNI_ERR;
}
void netty_unix_errors_JNI_OnUnLoad(JNIEnv* env, const char* packagePrefix) {
// delete global references so the GC can collect them
NETTY_JNI_UTIL_UNLOAD_CLASS(env, oomErrorClass);
NETTY_JNI_UTIL_UNLOAD_CLASS(env, runtimeExceptionClass);
NETTY_JNI_UTIL_UNLOAD_CLASS_WEAK(env, channelExceptionClassWeak);
NETTY_JNI_UTIL_UNLOAD_CLASS(env, ioExceptionClass);
NETTY_JNI_UTIL_UNLOAD_CLASS(env, portUnreachableExceptionClass);
NETTY_JNI_UTIL_UNLOAD_CLASS(env, closedChannelExceptionClass);
netty_jni_util_unregister_natives(env, packagePrefix, ERRORS_CLASSNAME);
}
