| 1 | /*
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| 2 | * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved.
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| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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| 4 | *
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| 5 | * This code is free software; you can redistribute it and/or modify it
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| 6 | * under the terms of the GNU General Public License version 2 only, as
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| 7 | * published by the Free Software Foundation. Oracle designates this
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| 8 | * particular file as subject to the "Classpath" exception as provided
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| 9 | * by Oracle in the LICENSE file that accompanied this code.
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| 10 | *
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| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT
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| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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| 14 | * version 2 for more details (a copy is included in the LICENSE file that
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| 15 | * accompanied this code).
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License version
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| 18 | * 2 along with this work; if not, write to the Free Software Foundation,
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| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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| 20 | *
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| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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| 22 | * or visit www.oracle.com if you need additional information or have any
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| 23 | * questions.
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| 24 | */
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| 25 |
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| 26 | /*
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| 27 | * Copyright 2003 Wily Technology, Inc.
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| 28 | */
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| 29 |
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| 30 | #ifndef _REENTRANCY_H_
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| 31 | #define _REENTRANCY_H_
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| 32 |
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| 33 | #include <jni.h>
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| 34 |
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| 35 | /*
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| 36 | * This module provides some utility functions to support the "same thread" re-entrancy management.
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| 37 | * Uses JVMTI TLS to store a single bit per thread.
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| 38 | * Non-zero means the thread is already inside; zero means the thread is not inside.
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| 39 | */
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| 40 |
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| 41 | #ifdef __cplusplus
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| 42 | extern "C" {
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| 43 | #endif
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| 44 |
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| 45 | /* returns true if the token is acquired by this call,
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| 46 | * false if we already hold it and do not have to acquire it
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| 47 | */
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| 48 | extern jboolean
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| 49 | tryToAcquireReentrancyToken( jvmtiEnv * jvmtienv,
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| 50 | jthread thread);
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| 51 |
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| 52 | /* release the token; assumes we already hold it */
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| 53 | extern void
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| 54 | releaseReentrancyToken( jvmtiEnv * jvmtienv,
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| 55 | jthread thread);
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| 56 |
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| 57 |
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| 58 | #ifdef __cplusplus
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| 59 | } /* extern "C" */
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| 60 | #endif /* __cplusplus */
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| 61 |
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| 62 |
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| 63 | #endif
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