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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "debugger.h"
#include "jni_internal.h"
#include "object.h"
#include "ScopedUtfChars.h"
#include "thread.h"
#include "thread_list.h"
#include "JniConstants.h" // Last to avoid problems with LOG redefinition.
namespace art {
namespace {
jobject Thread_currentThread(JNIEnv* env, jclass) {
return AddLocalReference<jobject>(env, Thread::Current()->GetPeer());
}
jboolean Thread_interrupted(JNIEnv* env, jclass) {
return Thread::Current()->Interrupted();
}
jboolean Thread_isInterrupted(JNIEnv* env, jobject javaThread) {
ScopedThreadListLock thread_list_lock;
Thread* thread = Thread::FromManagedThread(env, javaThread);
return (thread != NULL) ? thread->IsInterrupted() : JNI_FALSE;
}
void Thread_nativeCreate(JNIEnv* env, jclass, jobject javaThread, jlong stackSize) {
Object* managedThread = Decode<Object*>(env, javaThread);
Thread::Create(managedThread, stackSize);
}
jint Thread_nativeGetStatus(JNIEnv* env, jobject javaThread) {
ScopedThreadListLock thread_list_lock;
Thread* thread = Thread::FromManagedThread(env, javaThread);
if (thread == NULL) {
return -1;
}
return static_cast<jint>(thread->GetState());
}
jboolean Thread_nativeHoldsLock(JNIEnv* env, jobject javaThread, jobject javaObject) {
Object* object = Decode<Object*>(env, javaObject);
if (object == NULL) {
ScopedThreadStateChange tsc(Thread::Current(), Thread::kRunnable);
Thread::Current()->ThrowNewException("Ljava/lang/NullPointerException;", "object == null");
return JNI_FALSE;
}
ScopedThreadListLock thread_list_lock;
Thread* thread = Thread::FromManagedThread(env, javaThread);
return thread->HoldsLock(object);
}
void Thread_nativeInterrupt(JNIEnv* env, jobject javaThread) {
ScopedThreadListLock thread_list_lock;
Thread* thread = Thread::FromManagedThread(env, javaThread);
if (thread != NULL) {
thread->Interrupt();
}
}
void Thread_nativeSetName(JNIEnv* env, jobject javaThread, jstring javaName) {
ScopedThreadListLock thread_list_lock;
Thread* thread = Thread::FromManagedThread(env, javaThread);
if (thread == NULL) {
return;
}
ScopedUtfChars name(env, javaName);
if (name.c_str() == NULL) {
return;
}
thread->SetThreadName(name.c_str());
}
/*
* Alter the priority of the specified thread. "newPriority" will range
* from Thread.MIN_PRIORITY to Thread.MAX_PRIORITY (1-10), with "normal"
* threads at Thread.NORM_PRIORITY (5).
*/
void Thread_nativeSetPriority(JNIEnv* env, jobject javaThread, jint newPriority) {
ScopedThreadListLock thread_list_lock;
Thread* thread = Thread::FromManagedThread(env, javaThread);
if (thread != NULL) {
thread->SetNativePriority(newPriority);
}
}
/*
* Causes the thread to temporarily pause and allow other threads to execute.
*
* The exact behavior is poorly defined. Some discussion here:
* http://www.cs.umd.edu/~pugh/java/memoryModel/archive/0944.html
*/
void Thread_yield(JNIEnv*, jobject) {
sched_yield();
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(Thread, currentThread, "()Ljava/lang/Thread;"),
NATIVE_METHOD(Thread, interrupted, "()Z"),
NATIVE_METHOD(Thread, isInterrupted, "()Z"),
NATIVE_METHOD(Thread, nativeCreate, "(Ljava/lang/Thread;J)V"),
NATIVE_METHOD(Thread, nativeGetStatus, "()I"),
NATIVE_METHOD(Thread, nativeHoldsLock, "(Ljava/lang/Object;)Z"),
NATIVE_METHOD(Thread, nativeInterrupt, "()V"),
NATIVE_METHOD(Thread, nativeSetName, "(Ljava/lang/String;)V"),
NATIVE_METHOD(Thread, nativeSetPriority, "(I)V"),
NATIVE_METHOD(Thread, yield, "()V"),
};
} // namespace
void register_java_lang_Thread(JNIEnv* env) {
jniRegisterNativeMethods(env, "java/lang/Thread", gMethods, NELEM(gMethods));
}
} // namespace art
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