static jint netty_epoll_native_JNI_OnLoad(JNIEnv* env, const char* packagePrefix) {
int limitsOnLoadCalled = 0;
int errorsOnLoadCalled = 0;
int filedescriptorOnLoadCalled = 0;
int socketOnLoadCalled = 0;
int bufferOnLoadCalled = 0;
int linuxsocketOnLoadCalled = 0;
// We must register the statically referenced methods first!
if (netty_unix_util_register_natives(env,
packagePrefix,
"io/netty/channel/epoll/NativeStaticallyReferencedJniMethods",
statically_referenced_fixed_method_table,
statically_referenced_fixed_method_table_size) != 0) {
goto error;
}
// Register the methods which are not referenced by static member variables
JNINativeMethod* dynamicMethods = createDynamicMethodsTable(packagePrefix);
if (netty_unix_util_register_natives(env,
packagePrefix,
"io/netty/channel/epoll/Native",
dynamicMethods,
dynamicMethodsTableSize()) != 0) {
freeDynamicMethodsTable(dynamicMethods);
goto error;
}
freeDynamicMethodsTable(dynamicMethods);
dynamicMethods = NULL;
// 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;
if (netty_epoll_linuxsocket_JNI_OnLoad(env, packagePrefix) == JNI_ERR) {
goto error;
}
linuxsocketOnLoadCalled = 1;
// Initialize this module
char* nettyClassName = netty_unix_util_prepend(packagePrefix, "io/netty/channel/epoll/NativeDatagramPacketArray$NativeDatagramPacket");
jclass nativeDatagramPacketCls = (*env)->FindClass(env, nettyClassName);
free(nettyClassName);
nettyClassName = NULL;
if (nativeDatagramPacketCls == NULL) {
// pending exception...
goto error;
}
packetAddrFieldId = (*env)->GetFieldID(env, nativeDatagramPacketCls, "addr", "[B");
if (packetAddrFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: NativeDatagramPacket.addr");
goto error;
}
packetScopeIdFieldId = (*env)->GetFieldID(env, nativeDatagramPacketCls, "scopeId", "I");
if (packetScopeIdFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: NativeDatagramPacket.scopeId");
goto error;
}
packetPortFieldId = (*env)->GetFieldID(env, nativeDatagramPacketCls, "port", "I");
if (packetPortFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: NativeDatagramPacket.port");
goto error;
}
packetMemoryAddressFieldId = (*env)->GetFieldID(env, nativeDatagramPacketCls, "memoryAddress", "J");
if (packetMemoryAddressFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: NativeDatagramPacket.memoryAddress");
goto error;
}
packetCountFieldId = (*env)->GetFieldID(env, nativeDatagramPacketCls, "count", "I");
if (packetCountFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: NativeDatagramPacket.count");
goto error;
}
return NETTY_JNI_VERSION;
error:
if (limitsOnLoadCalled == 1) {
netty_unix_limits_JNI_OnUnLoad(env);
}
if (errorsOnLoadCalled == 1) {
netty_unix_errors_JNI_OnUnLoad(env);
}
if (filedescriptorOnLoadCalled == 1) {
netty_unix_filedescriptor_JNI_OnUnLoad(env);
}
if (socketOnLoadCalled == 1) {
netty_unix_socket_JNI_OnUnLoad(env);
}
if (bufferOnLoadCalled == 1) {
netty_unix_buffer_JNI_OnUnLoad(env);
}
if (linuxsocketOnLoadCalled == 1) {
netty_epoll_linuxsocket_JNI_OnUnLoad(env);
}
packetAddrFieldId = NULL;
packetScopeIdFieldId = NULL;
packetPortFieldId = NULL;
packetMemoryAddressFieldId = NULL;
packetCountFieldId = NULL;
return JNI_ERR;
}
static inline jint epollCtl(JNIEnv* env, jint efd, int op, jint fd, jint flags) {
uint32_t events = flags;
struct epoll_event ev = {
.data.fd = fd,
.events = events
};
return epoll_ctl(efd, op, fd, &ev);
}
// util methods end
jint JNI_OnLoad(JavaVM* vm, void* reserved) {
JNIEnv* env;
if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_6) != JNI_OK) {
return JNI_ERR;
} else {
// Load the prefix to use when looking for Netty classes
jclass systemCls = (*env)->FindClass(env, "java/lang/System");
if (systemCls == NULL) {
return JNI_ERR;
}
jmethodID getPropertyMethod = (*env)->GetStaticMethodID(env, systemCls, "getProperty", "(Ljava/lang/String;)Ljava/lang/String;");
if (getPropertyMethod == NULL) {
return JNI_ERR;
}
jstring propertyName = (*env)->NewStringUTF(env, "io.netty.native.epoll.nettyPackagePrefix");
nettyPackagePrefixJString = (*env)->CallStaticObjectMethod(env, systemCls, getPropertyMethod, propertyName);
if (nettyPackagePrefixJString != NULL) {
nettyPackagePrefix = (*env)->GetStringUTFChars(env, nettyPackagePrefixJString, 0);
}
if (netty_unix_errors_JNI_OnLoad(env, nettyPackagePrefix) == JNI_ERR) {
return JNI_ERR;
}
if (netty_unix_filedescriptor_JNI_OnLoad(env, nettyPackagePrefix) == JNI_ERR) {
return JNI_ERR;
}
if (netty_unix_socket_JNI_OnLoad(env, nettyPackagePrefix) == JNI_ERR) {
return JNI_ERR;
}
nettyClassName = netty_unix_util_prepend(nettyPackagePrefix, "io/netty/channel/DefaultFileRegion");
jclass fileRegionCls = (*env)->FindClass(env, nettyClassName);
free(nettyClassName);
nettyClassName = NULL;
if (fileRegionCls == NULL) {
// pending exception...
return JNI_ERR;
}
fileChannelFieldId = (*env)->GetFieldID(env, fileRegionCls, "file", "Ljava/nio/channels/FileChannel;");
if (fileChannelFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: DefaultFileRegion.file");
return JNI_ERR;
}
transferedFieldId = (*env)->GetFieldID(env, fileRegionCls, "transfered", "J");
if (transferedFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: DefaultFileRegion.transfered");
return JNI_ERR;
}
jclass fileChannelCls = (*env)->FindClass(env, "sun/nio/ch/FileChannelImpl");
if (fileChannelCls == NULL) {
// pending exception...
return JNI_ERR;
}
fileDescriptorFieldId = (*env)->GetFieldID(env, fileChannelCls, "fd", "Ljava/io/FileDescriptor;");
if (fileDescriptorFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: FileChannelImpl.fd");
return JNI_ERR;
}
jclass fileDescriptorCls = (*env)->FindClass(env, "java/io/FileDescriptor");
if (fileDescriptorCls == NULL) {
// pending exception...
return JNI_ERR;
}
fdFieldId = (*env)->GetFieldID(env, fileDescriptorCls, "fd", "I");
if (fdFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: FileDescriptor.fd");
return JNI_ERR;
}
nettyClassName = netty_unix_util_prepend(nettyPackagePrefix, "io/netty/channel/epoll/NativeDatagramPacketArray$NativeDatagramPacket");
jclass nativeDatagramPacketCls = (*env)->FindClass(env, nettyClassName);
free(nettyClassName);
nettyClassName = NULL;
if (nativeDatagramPacketCls == NULL) {
// pending exception...
return JNI_ERR;
}
packetAddrFieldId = (*env)->GetFieldID(env, nativeDatagramPacketCls, "addr", "[B");
if (packetAddrFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: NativeDatagramPacket.addr");
return JNI_ERR;
}
packetScopeIdFieldId = (*env)->GetFieldID(env, nativeDatagramPacketCls, "scopeId", "I");
if (packetScopeIdFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: NativeDatagramPacket.scopeId");
return JNI_ERR;
}
packetPortFieldId = (*env)->GetFieldID(env, nativeDatagramPacketCls, "port", "I");
if (packetPortFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: NativeDatagramPacket.port");
return JNI_ERR;
}
packetMemoryAddressFieldId = (*env)->GetFieldID(env, nativeDatagramPacketCls, "memoryAddress", "J");
if (packetMemoryAddressFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: NativeDatagramPacket.memoryAddress");
return JNI_ERR;
}
packetCountFieldId = (*env)->GetFieldID(env, nativeDatagramPacketCls, "count", "I");
if (packetCountFieldId == NULL) {
netty_unix_errors_throwRuntimeException(env, "failed to get field ID: NativeDatagramPacket.count");
return JNI_ERR;
}
if (nettyPackagePrefixJString != NULL) {
(*env)->ReleaseStringUTFChars(env, nettyPackagePrefixJString, nettyPackagePrefix);
nettyPackagePrefix = NULL;
nettyPackagePrefixJString = NULL;
}
return JNI_VERSION_1_6;
}
}