Home | History | Annotate | Download | only in native 
      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 "JNIHelp.h"
     43 
     44 #define NATIVE_METHOD(className, functionName, signature) \
     45 { #functionName, signature, (void*)(className ## _ ## functionName) }
     46 
     47 JNIEXPORT jlong JNICALL
     48 Runtime_freeMemory(JNIEnv *env, jobject this)
     49 {
     50     return JVM_FreeMemory();
     51 }
     52 
     53 JNIEXPORT jlong JNICALL
     54 Runtime_totalMemory(JNIEnv *env, jobject this)
     55 {
     56     return JVM_TotalMemory();
     57 }
     58 
     59 JNIEXPORT jlong JNICALL
     60 Runtime_maxMemory(JNIEnv *env, jobject this)
     61 {
     62     return JVM_MaxMemory();
     63 }
     64 
     65 JNIEXPORT void JNICALL
     66 Runtime_gc(JNIEnv *env, jobject this)
     67 {
     68     JVM_GC();
     69 }
     70 
     71 JNIEXPORT void JNICALL
     72 Runtime_nativeExit(JNIEnv *env, jclass this, jint status)
     73 {
     74     JVM_Exit(status);
     75 }
     76 
     77 JNIEXPORT jstring JNICALL
     78 Runtime_nativeLoad(JNIEnv* env, jclass ignored, jstring javaFilename,
     79                    jobject javaLoader, jstring javaLibrarySearchPath)
     80 {
     81     return JVM_NativeLoad(env, javaFilename, javaLoader, javaLibrarySearchPath);
     82 }
     83 
     84 static JNINativeMethod gMethods[] = {
     85   NATIVE_METHOD(Runtime, freeMemory, "!()J"),
     86   NATIVE_METHOD(Runtime, totalMemory, "!()J"),
     87   NATIVE_METHOD(Runtime, maxMemory, "!()J"),
     88   NATIVE_METHOD(Runtime, gc, "()V"),
     89   NATIVE_METHOD(Runtime, nativeExit, "(I)V"),
     90   NATIVE_METHOD(Runtime, nativeLoad,
     91                 "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;)"
     92                     "Ljava/lang/String;"),
     93 };
     94 
     95 void register_java_lang_Runtime(JNIEnv* env) {
     96   jniRegisterNativeMethods(env, "java/lang/Runtime", gMethods, NELEM(gMethods));
     97 }
     98