c15cc30571
Adding hidden attribute results in compilation failure if the symbol is not found when linking the .so. It should also lead to better performance, as it side-steps GOT. Change-Id: I7b6f39e663ca2b3e432669a3e2b36d7395f555b6 Signed-off-by: Robert Varga <nite@hq.sk>
119 lines
4.6 KiB
C
119 lines
4.6 KiB
C
/*
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* Copyright (c) 2016 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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/*
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* Utilities for accessing Java classes/method/fields in an efficient
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* manner.
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*/
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/*
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* A potentially-uninitialized reference to a Java class
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*/
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typedef struct vppjni_class {
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// Fully-Qualified Class Name
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const char *fqcn;
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// Constructor signature
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const char *init_sig;
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// Global reference to class handle
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jclass jclass;
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// Constructor method handle
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jmethodID jinit;
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// Next item in linked list
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struct vppjni_class *next;
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} vppjni_class_t;
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typedef struct jenv_field {
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// Field name
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const char *name;
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// Field type
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const char *type;
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// Defining class reference
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const vppjni_class_t *clsref;
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// Field handle
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jfieldID jfield;
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// Next item in linked list
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struct jenv_field *next;
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} vppjni_field_t;
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#define VPPJNI_CLASS_SYMBOL(name) vppjni_class_##name
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#define VPPJNI_CLASS_INIT(name) vppjni_class_##name##_init
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#define BIND_JAPI_CLASS(name, sig) \
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static vppjni_class_t VPPJNI_CLASS_SYMBOL(name); \
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static void VPPJNI_CLASS_INIT(name)(void) __attribute__((__constructor__)); \
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static void VPPJNI_CLASS_INIT(name)() \
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{ \
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VPPJNI_CLASS_SYMBOL(name).fqcn = "org/openvpp/vppjapi/" #name; \
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VPPJNI_CLASS_SYMBOL(name).init_sig = sig; \
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vppjni_register_class(&VPPJNI_CLASS_SYMBOL(name)); \
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} \
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static __attribute__((unused)) jobject name##Array(JNIEnv *env, jsize length) \
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{ \
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return (*env)->NewObjectArray(env, length, VPPJNI_CLASS_SYMBOL(name).jclass, NULL); \
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} \
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static jobject name##Object(JNIEnv *env, ...) \
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{ \
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va_list ap; \
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va_start(ap, env); \
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jobject obj = vppjni_new_object(env, &VPPJNI_CLASS_SYMBOL(name), ap); \
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va_end(ap); \
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return obj; \
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}
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#define VPPJNI_FIELD_SYMBOL(cls, name) vppjni_field_##cls##_##name
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#define VPPJNI_FIELD_INIT(cls, name) vppjni_field_##cls##_##name##_init
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#define BIND_JAPI_FIELD(cls, field, sig) \
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static vppjni_field_t VPPJNI_FIELD_SYMBOL(cls, field); \
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static void VPPJNI_FIELD_INIT(cls, field)(void) __attribute__((__constructor__)); \
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static void VPPJNI_FIELD_INIT(cls, field)() \
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{ \
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VPPJNI_FIELD_SYMBOL(cls, field).name = #field; \
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VPPJNI_FIELD_SYMBOL(cls, field).type = sig; \
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VPPJNI_FIELD_SYMBOL(cls, field).clsref = &VPPJNI_CLASS_SYMBOL(cls); \
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vppjni_register_field(&VPPJNI_FIELD_SYMBOL(cls, field)); \
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}
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#define BIND_JAPI_BOOL_FIELD(cls, field) \
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BIND_JAPI_FIELD(cls, field, "Z"); \
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static void set_##cls##_##field(JNIEnv *env, jobject obj, jboolean value) \
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{ \
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(*env)->SetBooleanField(env, obj, VPPJNI_FIELD_SYMBOL(cls, field).jfield, value); \
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}
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#define BIND_JAPI_BYTE_FIELD(cls, field) \
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BIND_JAPI_FIELD(cls, field, "B"); \
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static void set_##cls##_##field(JNIEnv *env, jobject obj, jbyte value) \
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{ \
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(*env)->SetByteField(env, obj, VPPJNI_FIELD_SYMBOL(cls, field).jfield, value); \
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}
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#define BIND_JAPI_INT_FIELD(cls, field) \
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BIND_JAPI_FIELD(cls, field, "I"); \
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static void set_##cls##_##field(JNIEnv *env, jobject obj, jint value) \
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{ \
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(*env)->SetIntField(env, obj, VPPJNI_FIELD_SYMBOL(cls, field).jfield, value); \
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}
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#define BIND_JAPI_OBJ_FIELD(cls, field, sig) \
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BIND_JAPI_FIELD(cls, field, sig); \
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static void set_##cls##_##field(JNIEnv *env, jobject obj, jobject value) \
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{ \
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(*env)->SetObjectField(env, obj, VPPJNI_FIELD_SYMBOL(cls, field).jfield, value); \
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}
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#define BIND_JAPI_STRING_FIELD(cls, field) \
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BIND_JAPI_OBJ_FIELD(cls, field, "Ljava/lang/String;")
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jobject vppjni_new_object(JNIEnv *env, const vppjni_class_t *ptr, va_list ap) __attribute__ ((visibility ("hidden")));
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void vppjni_register_class(vppjni_class_t *ptr) __attribute__ ((visibility ("hidden")));
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void vppjni_register_field(vppjni_field_t *ptr) __attribute__ ((visibility ("hidden")));
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int vppjni_init(JNIEnv *env) __attribute__ ((visibility ("hidden")));
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void vppjni_uninit(JNIEnv *env) __attribute__ ((visibility ("hidden")));
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