1 /*
 2  * Copyright (c) 1994, 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.  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  *      Stuff for dealing with threads.
28  *      originally in threadruntime.c, Sun Sep 22 12:09:39 1991
29  */
30 
31 #include "jni.h"
32 #include "jvm.h"
33 
34 #include "java_lang_Thread.h"
35 
36 #define THD "Ljava/lang/Thread;"
37 #define OBJ "Ljava/lang/Object;"
38 #define STE "Ljava/lang/StackTraceElement;"
39 #define STR "Ljava/lang/String;"
40 
41 #define ARRAY_LENGTH(a) (sizeof(a)/sizeof(a[0]))
42 
43 static JNINativeMethod methods[] = {
44     {"start0",           "()V",        (void *)&JVM_StartThread},
45     {"stop0",            "(" OBJ ")V", (void *)&JVM_StopThread},
46     {"isAlive0",         "()Z",        (void *)&JVM_IsThreadAlive},
47     {"suspend0",         "()V",        (void *)&JVM_SuspendThread},
48     {"resume0",          "()V",        (void *)&JVM_ResumeThread},
49     {"setPriority0",     "(I)V",       (void *)&JVM_SetThreadPriority},
50     {"yield0",           "()V",        (void *)&JVM_Yield},
51     {"sleep0",           "(J)V",       (void *)&JVM_Sleep},
52     {"currentThread0",   "()" THD,     (void *)&JVM_CurrentThread0},
53     {"interrupt0",       "()V",        (void *)&JVM_Interrupt},
54     {"holdsLock",        "(" OBJ ")Z", (void *)&JVM_HoldsLock},
55     {"getThreads",        "()[" THD,   (void *)&JVM_GetAllThreads},
56     {"dumpThreads",      "([" THD ")[[" STE, (void *)&JVM_DumpThreads},
57     {"setNativeName",    "(" STR ")V", (void *)&JVM_SetNativeThreadName},
58     {"scopeLocalCache",   "()[" OBJ,   (void *)&JVM_ScopeLocalCache},
59     {"setScopeLocalCache", "([" OBJ ")V",(void *)&JVM_SetScopeLocalCache},
60     {"currentThread",    "()" THD,     (void *)&JVM_CurrentThread},
61     {"setCurrentThread", "(" THD ")V", (void *)&JVM_SetCurrentThread},
62     {"getStackTrace0",   "()" OBJ,     (void *)&JVM_GetStackTrace},
63 };
64 
65 #undef THD
66 #undef OBJ
67 #undef STE
68 #undef STR
69 
70 JNIEXPORT void JNICALL
71 Java_java_lang_Thread_registerNatives(JNIEnv *env, jclass cls)
72 {
73     (*env)->RegisterNatives(env, cls, methods, ARRAY_LENGTH(methods));
74 }
75 
76 JNIEXPORT void JNICALL
77 Java_java_lang_Thread_clearInterruptEvent(JNIEnv *env, jclass cls)
78 {
79 #if defined(_WIN32)
80     // Need to reset the interrupt event used by Process.waitFor
81     ResetEvent((HANDLE) JVM_GetThreadInterruptEvent());
82 #endif
83 }