text: /*
   * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  #include <jni.h>
  #include "management.h"
  #include "sun_management_Flag.h"
  
  static jobject default_origin = NULL;
  static jobject vm_creation_origin = NULL;
  static jobject mgmt_origin = NULL;
  static jobject envvar_origin = NULL;
  static jobject config_file_origin = NULL;
  static jobject ergo_origin = NULL;
  static jobject other_origin = NULL;
  
  JNIEXPORT jint JNICALL
  Java_sun_management_Flag_getInternalFlagCount
    (JNIEnv *env, jclass cls)
  {
      jlong count = jmm_interface->GetLongAttribute(env, NULL,
                                                    JMM_VM_GLOBAL_COUNT);
      return (jint) count;
  }
  
  JNIEXPORT jobjectArray JNICALL
    Java_sun_management_Flag_getAllFlagNames
  (JNIEnv *env, jclass cls)
  {
    return jmm_interface->GetVMGlobalNames(env);
  }
  
  static jobject find_origin_constant(JNIEnv* env, const char* enum_name) {
      jvalue field;
      field = JNU_GetStaticFieldByName(env,
                                       NULL,
                                       "com/sun/management/VMOption$Origin",
                                       enum_name,
                                       "Lcom/sun/management/VMOption$Origin;");
      return (*env)->NewGlobalRef(env, field.l);
  }
  
  JNIEXPORT void JNICALL
  Java_sun_management_Flag_initialize
    (JNIEnv *env, jclass cls)
  {
      default_origin = find_origin_constant(env, "DEFAULT");
      vm_creation_origin = find_origin_constant(env, "VM_CREATION");
      mgmt_origin = find_origin_constant(env, "MANAGEMENT");
      envvar_origin = find_origin_constant(env, "ENVIRON_VAR");
      config_file_origin = find_origin_constant(env, "CONFIG_FILE");
      ergo_origin = find_origin_constant(env, "ERGONOMIC");
      other_origin = find_origin_constant(env, "OTHER");
  }
  
  JNIEXPORT jint JNICALL
  Java_sun_management_Flag_getFlags
    (JNIEnv *env, jclass cls, jobjectArray names, jobjectArray flags, jint count)
  {
      jint num_flags, i, index;
      jmmVMGlobal* globals;
      size_t gsize;
      const char* class_name = "sun/management/Flag";
      const char* signature = "(Ljava/lang/String;Ljava/lang/Object;ZZLcom/sun/management/VMOption$Origin;)V";
      jobject origin;
      jobject valueObj;
      jobject flag;
  
      if (flags == NULL) {
          JNU_ThrowNullPointerException(env, 0);
          return 0;
      }
  
      if (count == 0) {
          JNU_ThrowIllegalArgumentException(env, 0);
          return 0;
      }
  
      gsize = count * sizeof(jmmVMGlobal);
      globals = (jmmVMGlobal*) malloc(gsize);
      if (globals == NULL) {
          JNU_ThrowOutOfMemoryError(env, 0);
          return 0;
      }
  
      memset(globals, 0, gsize);
      num_flags = jmm_interface->GetVMGlobals(env, names, globals, count);
      if (num_flags == 0) {
          free(globals);
          return 0;
      }
  
      index = 0;
      for (i = 0; i < count; i++) {
          if (globals[i].name == NULL) {
              continue;
          }
          switch (globals[i].type) {
          case JMM_VMGLOBAL_TYPE_JBOOLEAN:
              valueObj = JNU_NewObjectByName(env, "java/lang/Boolean", "(Z)V",
                                             globals[i].value.z);
              break;
          case JMM_VMGLOBAL_TYPE_JSTRING:
              valueObj = globals[i].value.l;
              break;
          case JMM_VMGLOBAL_TYPE_JLONG:
              valueObj = JNU_NewObjectByName(env, "java/lang/Long", "(J)V",
                                             globals[i].value.j);
              break;
          default:
              // ignore unsupported type
              continue;
          }
          switch (globals[i].origin) {
          case JMM_VMGLOBAL_ORIGIN_DEFAULT:
              origin = default_origin;
              break;
          case JMM_VMGLOBAL_ORIGIN_COMMAND_LINE:
              origin = vm_creation_origin;
              break;
          case JMM_VMGLOBAL_ORIGIN_MANAGEMENT:
              origin = mgmt_origin;
              break;
          case JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR:
              origin = envvar_origin;
              break;
          case JMM_VMGLOBAL_ORIGIN_CONFIG_FILE:
              origin = config_file_origin;
              break;
          case JMM_VMGLOBAL_ORIGIN_ERGONOMIC:
              origin = ergo_origin;
              break;
          case JMM_VMGLOBAL_ORIGIN_OTHER:
              origin = other_origin;
              break;
          default:
              // unknown origin
              origin = other_origin;
              break;
          }
          flag = JNU_NewObjectByName(env, class_name, signature, globals[i].name,
                                     valueObj, globals[i].writeable,
                                     globals[i].external, origin);
          if (flag == NULL) {
              free(globals);
              JNU_ThrowOutOfMemoryError(env, 0);
              return 0;
          }
          (*env)->SetObjectArrayElement(env, flags, index, flag);
          index++;
      }
  
      if (index != num_flags) {
          JNU_ThrowInternalError(env, "Number of Flag objects created unmatched");
          free(globals);
          return 0;
      }
  
      free(globals);
  
      /* return the number of Flag objects created */
      return num_flags;
  }
  
  JNIEXPORT void JNICALL
  Java_sun_management_Flag_setLongValue
    (JNIEnv *env, jclass cls, jstring name, jlong value)
  {
     jvalue v;
     v.j = value;
  
     jmm_interface->SetVMGlobal(env, name, v);
  }
  
  JNIEXPORT void JNICALL
  Java_sun_management_Flag_setBooleanValue
    (JNIEnv *env, jclass cls, jstring name, jboolean value)
  {
     jvalue v;
     v.z = value;
  
     jmm_interface->SetVMGlobal(env, name, v);
  }
  
  JNIEXPORT void JNICALL
  Java_sun_management_Flag_setStringValue
    (JNIEnv *env, jclass cls, jstring name, jstring value)
  {
     jvalue v;
     v.l = value;
  
     jmm_interface->SetVMGlobal(env, name, v);
  }
  