src/native/vm/gnuclasspath/gnu_java_lang_management_VMMemoryMXBeanImpl.cpp

   1 /* src/native/vm/gnuclasspath/gnu_java_lang_management_VMMemoryMXBeanImpl.cpp
   2
   3    Copyright (C) 1996-2005, 2006, 2007, 2008
   4    CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
   5
   6    This file is part of CACAO.
   7
   8    This program is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU General Public License as
  10    published by the Free Software Foundation; either version 2, or (at
  11    your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful, but
  14    WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21    02110-1301, USA.
  22
  23 */
  24
  25
  26 #include "config.h"
  27
  28 #include <stdint.h>
  29
  30 #include "mm/gc.hpp"
  31
  32 #include "native/jni.hpp"
  33 #include "native/native.hpp"
  34
  35 #if defined(ENABLE_JNI_HEADERS)
  36 # include "native/vm/include/gnu_java_lang_management_VMMemoryMXBeanImpl.h"
  37 #endif
  38
  39 #include "vm/class.hpp"
  40 #include "vm/global.h"
  41 #include "vm/javaobjects.hpp"
  42 #include "vm/options.h"
  43 #include "vm/vm.hpp"
  44
  45
  46 // Native functions are exported as C functions.
  47 extern "C" {
  48
  49 /*
  50  * Class:     gnu/java/lang/management/VMMemoryMXBeanImpl
  51  * Method:    getHeapMemoryUsage
  52  * Signature: ()Ljava/lang/management/MemoryUsage;
  53  */
  54 JNIEXPORT jobject JNICALL Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getHeapMemoryUsage(JNIEnv *env, jclass clazz)
  55 {
  56         // Get values from the VM.
  57         // XXX If we ever support more than one VM, change this.
  58         int64_t init     = opt_heapstartsize;
  59         int64_t used     = gc_get_total_bytes();
  60         int64_t commited = gc_get_heap_size();
  61         int64_t maximum  = gc_get_max_heap_size();
  62
  63         // Construct a new java.lang.management.MemoryUsage object.
  64         java_lang_management_MemoryUsage jlmmu(init, used, commited, maximum);
  65
  66         return jlmmu.get_handle();
  67 }
  68
  69
  70 /*
  71  * Class:     gnu/java/lang/management/VMMemoryMXBeanImpl
  72  * Method:    getNonHeapMemoryUsage
  73  * Signature: ()Ljava/lang/management/MemoryUsage;
  74  */
  75 JNIEXPORT jobject JNICALL Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getNonHeapMemoryUsage(JNIEnv *env, jclass clazz)
  76 {
  77         log_println("Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getNonHeapMemoryUsage: IMPLEMENT ME!");
  78
  79         return NULL;
  80 }
  81
  82
  83 /*
  84  * Class:     gnu/java/lang/management/VMMemoryMXBeanImpl
  85  * Method:    getObjectPendingFinalizationCount
  86  * Signature: ()I
  87  */
  88 JNIEXPORT jint JNICALL Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getObjectPendingFinalizationCount(JNIEnv *env, jclass clazz)
  89 {
  90         log_println("Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getObjectPendingFinalizationCount: IMPLEMENT ME!");
  91
  92         return 0;
  93 }
  94
  95
  96 /*
  97  * Class:     gnu/java/lang/management/VMMemoryMXBeanImpl
  98  * Method:    isVerbose
  99  * Signature: ()Z
 100  */
 101 JNIEXPORT jboolean JNICALL Java_gnu_java_lang_management_VMMemoryMXBeanImpl_isVerbose(JNIEnv *env, jclass clazz)
 102 {
 103         return opt_verbosegc;
 104 }
 105
 106
 107 /*
 108  * Class:     gnu/java/lang/management/VMMemoryMXBeanImpl
 109  * Method:    setVerbose
 110  * Signature: (Z)V
 111  */
 112 JNIEXPORT void JNICALL Java_gnu_java_lang_management_VMMemoryMXBeanImpl_setVerbose(JNIEnv *env, jclass clazz, jboolean verbose)
 113 {
 114         opt_verbosegc = verbose;
 115 }
 116
 117 } // extern "C"
 118
 119
 120 /* native methods implemented by this file ************************************/
 121
 122 static JNINativeMethod methods[] = {
 123         { (char*) "getHeapMemoryUsage",                (char*) "()Ljava/lang/management/MemoryUsage;", (void*) (uintptr_t) &Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getHeapMemoryUsage                },
 124         { (char*) "getNonHeapMemoryUsage",             (char*) "()Ljava/lang/management/MemoryUsage;", (void*) (uintptr_t) &Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getNonHeapMemoryUsage             },
 125         { (char*) "getObjectPendingFinalizationCount", (char*) "()I",                                  (void*) (uintptr_t) &Java_gnu_java_lang_management_VMMemoryMXBeanImpl_getObjectPendingFinalizationCount },
 126         { (char*) "isVerbose",                         (char*) "()Z",                                  (void*) (uintptr_t) &Java_gnu_java_lang_management_VMMemoryMXBeanImpl_isVerbose                         },
 127         { (char*) "setVerbose",                        (char*) "(Z)V",                                 (void*) (uintptr_t) &Java_gnu_java_lang_management_VMMemoryMXBeanImpl_setVerbose                        },
 128 };
 129
 130
 131 /* _Jv_gnu_java_lang_management_VMMemoryMXBeanImpl_init ************************
 132
 133    Register native functions.
 134
 135 *******************************************************************************/
 136
 137 void _Jv_gnu_java_lang_management_VMMemoryMXBeanImpl_init(void)
 138 {
 139         utf* u = utf_new_char("gnu/java/lang/management/VMMemoryMXBeanImpl");
 140
 141         NativeMethods& nm = VM::get_current()->get_nativemethods();
 142         nm.register_methods(u, methods, NATIVE_METHODS_COUNT);
 143 }
 144
 145
 146 /*
 147  * These are local overrides for various environment variables in Emacs.
 148  * Please do not remove this and leave it at the end of the file, where
 149  * Emacs will automagically detect them.
 150  * ---------------------------------------------------------------------
 151  * Local variables:
 152  * mode: c++
 153  * indent-tabs-mode: t
 154  * c-basic-offset: 4
 155  * tab-width: 4
 156  * End:
 157  * vim:noexpandtab:sw=4:ts=4:
 158  */