cc4a5e8089
Change-Id: Ibd5cbbdfb22a235442cddaebc9eae9a3c4e35ec9 Signed-off-by: Damjan Marion <damarion@cisco.com>
116 lines
4.2 KiB
Python
Executable File
116 lines
4.2 KiB
Python
Executable File
#!/usr/bin/env python2
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#
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# Copyright (c) 2018 Cisco and/or its affiliates.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from string import Template
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from jni_common_gen import generate_j2c_identifiers, generate_j2c_swap
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from jvpp_model import is_dump, is_request, is_control_ping, is_control_ping_reply
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def generate_jni_impl(model):
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"""
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Generates JNI bindings for sending dump and request messages.
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:param model: meta-model of VPP API used for jVPP generation.
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"""
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jni_impl = []
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for msg in model.messages:
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if is_control_ping(msg) or is_control_ping_reply(msg):
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# Skip control ping managed by jvpp registry.
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continue
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if not (is_dump(msg) or is_request(msg)):
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continue
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arguments = ""
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request_class = ""
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jni_identifiers = ""
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msg_initialization = ""
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if msg.has_fields:
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arguments = ", jobject request"
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request_class = _REQUEST_CLASS_TEMPLATE.substitute(
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plugin_name=model.plugin_name,
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java_dto_name=msg.java_name_upper
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)
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jni_identifiers = generate_j2c_identifiers(msg, class_ref_name="requestClass", object_ref_name="request")
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msg_initialization = generate_j2c_swap(msg, struct_ref_name="mp")
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jni_impl.append(_JNI_IMPL_TEMPLATE.substitute(
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c_name=msg.name,
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json_filename=model.json_api_files,
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json_definition=msg.doc,
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plugin_name=model.plugin_name,
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plugin_java_name=model.plugin_java_name,
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java_method_name=msg.java_name_lower,
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arguments=arguments,
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request_class=request_class,
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jni_identifiers=jni_identifiers,
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msg_size=_generate_msg_size(msg),
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crc=msg.crc,
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msg_initialization=msg_initialization
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))
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return "".join(jni_impl)
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_JNI_IMPL_TEMPLATE = Template("""
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/**
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* JNI binding for sending ${c_name} message.
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* Generated based on $json_filename:
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$json_definition
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*/
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JNIEXPORT jint JNICALL Java_io_fd_vpp_jvpp_${plugin_name}_JVpp${plugin_java_name}Impl_${java_method_name}0
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(JNIEnv * env, jclass clazz${arguments}) {
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${plugin_name}_main_t *plugin_main = &${plugin_name}_main;
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vl_api_${c_name}_t * mp;
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u32 my_context_id = vppjni_get_context_id (&jvpp_main);
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$request_class
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$jni_identifiers
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// create message:
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const size_t _size = ${msg_size};
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mp = vl_msg_api_alloc(_size);
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memset (mp, 0, _size);
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mp->_vl_msg_id = ntohs (get_message_id(env, "${c_name}_${crc}"));
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mp->client_index = plugin_main->my_client_index;
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mp->context = clib_host_to_net_u32 (my_context_id);
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$msg_initialization
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// send message:
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if (CLIB_DEBUG > 1)
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clib_warning ("Sending ${c_name} message");
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vl_msg_api_send_shmem (plugin_main->vl_input_queue, (u8 *)&mp);
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if ((*env)->ExceptionCheck(env)) {
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return JNI_ERR;
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}
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return my_context_id;
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}""")
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# TODO: cache method and field identifiers to achieve better performance
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# https://jira.fd.io/browse/HONEYCOMB-42
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_REQUEST_CLASS_TEMPLATE = Template(""" jclass requestClass = (*env)->FindClass(env, "io/fd/vpp/jvpp/${plugin_name}/dto/${java_dto_name}");
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""")
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def _generate_msg_size(msg):
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msg_size = "sizeof(*mp)"
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_size_components = []
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for field in msg.fields:
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# Ignore ZLAs for simplicity (to support them we need to call JNI functions to check actual size)
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if field.array_len_field:
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_size_components += " + %s*sizeof(%s)" % (field.array_len_field.java_name, field.type.base_type.vpp_name)
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# FIXME(VPP-586): for proper nested structures support, we need generate functions computing type sizes
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# and use it instead of sizeof
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return msg_size + "".join(_size_components)
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