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-rw-r--r--vpp-japi/japi/vppjni_env.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/vpp-japi/japi/vppjni_env.c b/vpp-japi/japi/vppjni_env.c
new file mode 100644
index 00000000000..84991eee242
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+++ b/vpp-japi/japi/vppjni_env.c
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+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed 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:
+ *
+ * http://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 <jni.h>
+
+#include "vppjni_env.h"
+
+// Head of the class registration list.
+static vppjni_class_t *class_head;
+// Head of the class registration list.
+static vppjni_field_t *field_head;
+
+void vppjni_init_register_class(vppjni_class_t *ptr)
+{
+ vppjni_class_t **where = &class_head;
+ while (*where != NULL) {
+ where = &((*where)->next);
+ }
+ *where = ptr;
+}
+
+void vppjni_register_field(vppjni_field_t *ptr) {
+ vppjni_field_t **where = &field_head;
+ while (*where != NULL) {
+ where = &((*where)->next);
+ }
+ *where = ptr;
+}
+
+jobject vppjni_init_new_object(JNIEnv *env, const vppjni_class_t *ptr, va_list ap) {
+ jobject obj = (*env)->NewObjectV(env, ptr->jclass, ptr->jinit, ap);
+ if ((*env)->ExceptionCheck(env)) {
+ (*env)->ExceptionDescribe(env);
+ return NULL;
+ }
+
+ return obj;
+}
+
+int vppjni_env_init(JNIEnv *env)
+{
+ vppjni_class_t *cwlk;
+ vppjni_field_t *fwlk;
+
+ for (cwlk = class_head; cwlk != NULL; cwlk = cwlk->next) {
+ jclass cls;
+ jmethodID method;
+
+ cls = (*env)->FindClass(env, cwlk->fqcn);
+ if ((*env)->ExceptionCheck(env)) {
+ (*env)->ExceptionDescribe(env);
+ vppjni_uninit(env);
+ return JNI_ERR;
+ }
+
+ method = (*env)->GetMethodID(env, cls, "<init>", cwlk->init_sig);
+ if ((*env)->ExceptionCheck(env)) {
+ (*env)->ExceptionDescribe(env);
+ vppjni_uninit(env);
+ return JNI_ERR;
+ }
+
+ cwlk->jclass = (*env)->NewGlobalRef(env, cls);
+ if (cwlk->jclass == NULL) {
+ vppjni_uninit(env);
+ return JNI_ERR;
+ }
+ cwlk->jinit = method;
+ }
+
+ for (fwlk = field_head; fwlk != NULL; fwlk = fwlk->next) {
+ fwlk->jfield = (*env)->GetFieldID(env, fwlk->clsref->jclass, fwlk->name, fwlk->type);
+ if ((*env)->ExceptionCheck(env)) {
+ (*env)->ExceptionDescribe(env);
+ vppjni_uninit(env);
+ return JNI_ERR;
+ }
+ }
+
+ return 0;
+}
+
+void vppjni_env_uninit(JNIEnv *env) {
+ vppjni_class_t *cwlk;
+ vppjni_field_t *fwlk;
+
+ for (fwlk = field_head; fwlk != NULL; fwlk = fwlk->next) {
+ fwlk->jfield = NULL;
+ }
+
+ for (cwlk = class_head; cwlk != NULL; cwlk = cwlk->next) {
+ if (cwlk->jclass != NULL ) {
+ (*env)->DeleteGlobalRef(env, cwlk->jclass);
+ }
+
+ cwlk->jclass = NULL;
+ cwlk->jinit = NULL;
+ }
+}
+