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      1 /*
      2  * Copyright (c) 1994, 2000, Oracle and/or its affiliates. All rights reserved.
      3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
      4  *
      5  * This code is free software; you can redistribute it and/or modify it
      6  * under the terms of the GNU General Public License version 2 only, as
      7  * published by the Free Software Foundation.  Oracle designates this
      8  * particular file as subject to the "Classpath" exception as provided
      9  * by Oracle in the LICENSE file that accompanied this code.
     10  *
     11  * This code is distributed in the hope that it will be useful, but WITHOUT
     12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
     14  * version 2 for more details (a copy is included in the LICENSE file that
     15  * accompanied this code).
     16  *
     17  * You should have received a copy of the GNU General Public License version
     18  * 2 along with this work; if not, write to the Free Software Foundation,
     19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
     20  *
     21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
     22  * or visit www.oracle.com if you need additional information or have any
     23  * questions.
     24  */
     25 
     26 /*
     27  *      Link foreign methods.  This first half of this file contains the
     28  *      machine independent dynamic linking routines.
     29  *      See "BUILD_PLATFORM"/java/lang/linker_md.c to see
     30  *      the implementation of this shared dynamic linking
     31  *      interface.
     32  *
     33  *      NOTE - source in this file is POSIX.1 compliant, host
     34  *             specific code lives in the platform specific
     35  *             code tree.
     36  */
     37 
     38 #include "jni.h"
     39 #include "jni_util.h"
     40 #include "jvm.h"
     41 
     42 #include <nativehelper/JNIHelp.h>
     43 
     44 #include "nativehelper/jni_macros.h"
     45 
     46 JNIEXPORT jlong JNICALL
     47 Runtime_freeMemory(JNIEnv *env, jobject this)
     48 {
     49     return JVM_FreeMemory();
     50 }
     51 
     52 JNIEXPORT jlong JNICALL
     53 Runtime_totalMemory(JNIEnv *env, jobject this)
     54 {
     55     return JVM_TotalMemory();
     56 }
     57 
     58 JNIEXPORT jlong JNICALL
     59 Runtime_maxMemory(JNIEnv *env, jobject this)
     60 {
     61     return JVM_MaxMemory();
     62 }
     63 
     64 JNIEXPORT void JNICALL
     65 Runtime_gc(JNIEnv *env, jobject this)
     66 {
     67     JVM_GC();
     68 }
     69 
     70 JNIEXPORT void JNICALL
     71 Runtime_nativeExit(JNIEnv *env, jclass this, jint status)
     72 {
     73     JVM_Exit(status);
     74 }
     75 
     76 JNIEXPORT jstring JNICALL
     77 Runtime_nativeLoad(JNIEnv* env, jclass ignored, jstring javaFilename,
     78                    jobject javaLoader)
     79 {
     80     return JVM_NativeLoad(env, javaFilename, javaLoader);
     81 }
     82 
     83 static JNINativeMethod gMethods[] = {
     84   FAST_NATIVE_METHOD(Runtime, freeMemory, "()J"),
     85   FAST_NATIVE_METHOD(Runtime, totalMemory, "()J"),
     86   FAST_NATIVE_METHOD(Runtime, maxMemory, "()J"),
     87   NATIVE_METHOD(Runtime, gc, "()V"),
     88   NATIVE_METHOD(Runtime, nativeExit, "(I)V"),
     89   NATIVE_METHOD(Runtime, nativeLoad,
     90                 "(Ljava/lang/String;Ljava/lang/ClassLoader;)"
     91                     "Ljava/lang/String;"),
     92 };
     93 
     94 void register_java_lang_Runtime(JNIEnv* env) {
     95   jniRegisterNativeMethods(env, "java/lang/Runtime", gMethods, NELEM(gMethods));
     96 }
     97