1/*
2 * Copyright (c) 2019, 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#ifndef SHARE_JVMCI_JNIACCESSMARK_INLINE_HPP
26#define SHARE_JVMCI_JNIACCESSMARK_INLINE_HPP
27
28#include "jvmci/jvmciEnv.hpp"
29#include "runtime/interfaceSupport.inline.hpp"
30
31// Wrapper for a JNI call into the JVMCI shared library.
32// This performs a ThreadToNativeFromVM transition so that the VM
33// will not be blocked if the call takes a long time (e.g., due
34// to a GC in the shared library).
35class JNIAccessMark : public StackObj {
36 private:
37 ThreadToNativeFromVM ttnfv;
38 HandleMark hm;
39 JNIEnv* _env;
40 public:
41 inline JNIAccessMark(JVMCIEnv* jvmci_env) :
42 ttnfv(JavaThread::current()), hm(JavaThread::current()) {
43 _env = jvmci_env->_env;
44 }
45 JNIEnv* env() const { return _env; }
46 JNIEnv* operator () () const { return _env; }
47};
48
49#endif // SHARE_JVMCI_JNIACCESSMARK_INLINE_HPP
50