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100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/*
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* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdlib.h>
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#include <assert.h>
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#include <string.h>
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#include "jni.h"
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#include "jni_util.h"
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#include "jlong.h"
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#include "jvm.h"
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#include "jdk_internal_loader_RawNativeLibraries.h"
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static jfieldID handleID;
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static jboolean initIDs(JNIEnv *env)
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{
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if (handleID == 0) {
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jclass rnlClz =
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(*env)->FindClass(env, "jdk/internal/loader/RawNativeLibraries$RawNativeLibraryImpl");
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if (rnlClz == 0)
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return JNI_FALSE;
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handleID = (*env)->GetFieldID(env, rnlClz, "handle", "J");
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if (handleID == 0)
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return JNI_FALSE;
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}
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return JNI_TRUE;
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}
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/*
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* Class: jdk_internal_loader_RawNativeLibraries
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* Method: Java_jdk_internal_loader_RawNativeLibraries_load0
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* Signature: (Ljdk/internal/loader/RawNativeLibraries/RawNativeLibraryImpl;Ljava/lang/String;)Z
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*/
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JNIEXPORT jboolean JNICALL
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Java_jdk_internal_loader_RawNativeLibraries_load0
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(JNIEnv *env, jclass cls, jobject lib, jstring name)
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{
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const char *cname;
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void * handle;
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if (!initIDs(env))
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return JNI_FALSE;
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cname = JNU_GetStringPlatformChars(env, name, 0);
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if (cname == 0)
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return JNI_FALSE;
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handle = JVM_LoadLibrary(cname, JNI_FALSE);
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(*env)->SetLongField(env, lib, handleID, ptr_to_jlong(handle));
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JNU_ReleaseStringPlatformChars(env, name, cname);
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return handle != 0L;
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}
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/*
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* Class: jdk_internal_loader_RawNativeLibraries
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* Method: unload0
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* Signature: (Ljava/lang/String;J)V
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*/
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JNIEXPORT void JNICALL Java_jdk_internal_loader_RawNativeLibraries_unload0
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(JNIEnv *env, jclass cls, jstring name, jlong address)
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{
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void *handle;
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const char *cname;
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if (!initIDs(env))
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return;
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cname = JNU_GetStringPlatformChars(env, name, 0);
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if (cname == NULL) {
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return;
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}
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handle = jlong_to_ptr(address);
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JVM_UnloadLibrary(handle);
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JNU_ReleaseStringPlatformChars(env, name, cname);
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}
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