+++ /dev/null
-// natThread.cc - Native part of Thread class.
-
-/* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation
-
- This file is part of libgcj.
-
-This software is copyrighted work licensed under the terms of the
-Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
-details. */
-
-#include <config.h>
-
-#include <stdlib.h>
-
-#include <gcj/cni.h>
-#include <jvm.h>
-#include <java-threads.h>
-
-#include <java/lang/Thread.h>
-#include <java/lang/ThreadGroup.h>
-#include <java/lang/IllegalArgumentException.h>
-#include <java/lang/UnsupportedOperationException.h>
-#include <java/lang/IllegalThreadStateException.h>
-#include <java/lang/InterruptedException.h>
-#include <java/lang/NullPointerException.h>
-
-#include <jni.h>
-
-#ifdef ENABLE_JVMPI
-#include <jvmpi.h>
-#endif
-
-\f
-
-// This structure is used to represent all the data the native side
-// needs. An object of this type is assigned to the `data' member of
-// the Thread class.
-struct natThread
-{
- // These are used to interrupt sleep and join calls. We can share a
- // condition variable here since it only ever gets notified when the thread
- // exits.
- _Jv_Mutex_t join_mutex;
- _Jv_ConditionVariable_t join_cond;
-
- // This is private data for the thread system layer.
- _Jv_Thread_t *thread;
-
- // Each thread has its own JNI object.
- JNIEnv *jni_env;
-};
-
-static void finalize_native (jobject ptr);
-
-// This is called from the constructor to initialize the native side
-// of the Thread.
-void
-java::lang::Thread::initialize_native (void)
-{
- natThread *nt = (natThread *) _Jv_AllocBytes (sizeof (natThread));
-
- // The native thread data is kept in a Object field, not a RawData, so that
- // the GC allocator can be used and a finalizer run after the thread becomes
- // unreachable. Note that this relies on the GC's ability to finalize
- // non-Java objects. FIXME?
- data = reinterpret_cast<jobject> (nt);
-
- // Register a finalizer to clean up the native thread resources.
- _Jv_RegisterFinalizer (data, finalize_native);
-
- _Jv_MutexInit (&nt->join_mutex);
- _Jv_CondInit (&nt->join_cond);
- nt->thread = _Jv_ThreadInitData (this);
- // FIXME: if JNI_ENV is set we will want to free it. It is
- // malloc()d.
- nt->jni_env = NULL;
-}
-
-static void
-finalize_native (jobject ptr)
-{
- natThread *nt = (natThread *) ptr;
- _Jv_ThreadDestroyData (nt->thread);
-}
-
-jint
-java::lang::Thread::countStackFrames (void)
-{
- // NOTE: This is deprecated in JDK 1.2.
- throw new UnsupportedOperationException
- (JvNewStringLatin1 ("Thread.countStackFrames unimplemented"));
- return 0;
-}
-
-java::lang::Thread *
-java::lang::Thread::currentThread (void)
-{
- return _Jv_ThreadCurrent ();
-}
-
-void
-java::lang::Thread::destroy (void)
-{
- // NOTE: This is marked as unimplemented in the JDK 1.2
- // documentation.
- throw new UnsupportedOperationException
- (JvNewStringLatin1 ("Thread.destroy unimplemented"));
-}
-
-void
-java::lang::Thread::interrupt (void)
-{
- natThread *nt = (natThread *) data;
- _Jv_ThreadInterrupt (nt->thread);
-}
-
-void
-java::lang::Thread::join (jlong millis, jint nanos)
-{
- if (millis < 0 || nanos < 0 || nanos > 999999)
- throw new IllegalArgumentException;
-
- Thread *current = currentThread ();
-
- // Here `NT' is the native structure for the thread we are trying to join.
- natThread *nt = (natThread *) data;
-
- // Now wait for: (1) an interrupt, (2) the thread to exit, or (3)
- // the timeout to occur.
- _Jv_MutexLock (&nt->join_mutex);
- if (! isAlive ())
- {
- _Jv_MutexUnlock (&nt->join_mutex);
- return;
- }
- _Jv_CondWait (&nt->join_cond, &nt->join_mutex, millis, nanos);
- _Jv_MutexUnlock (&nt->join_mutex);
-
- if (current->isInterrupted (true))
- throw new InterruptedException;
-}
-
-void
-java::lang::Thread::resume (void)
-{
- checkAccess ();
- throw new UnsupportedOperationException
- (JvNewStringLatin1 ("Thread.resume unimplemented"));
-}
-
-void
-java::lang::Thread::setPriority (jint newPriority)
-{
- checkAccess ();
- if (newPriority < MIN_PRIORITY || newPriority > MAX_PRIORITY)
- throw new IllegalArgumentException;
-
- jint gmax = group->getMaxPriority();
- if (newPriority > gmax)
- newPriority = gmax;
-
- priority = newPriority;
- natThread *nt = (natThread *) data;
- _Jv_ThreadSetPriority (nt->thread, priority);
-}
-
-void
-java::lang::Thread::sleep (jlong millis, jint nanos)
-{
- if (millis < 0 || nanos < 0 || nanos > 999999)
- throw new IllegalArgumentException;
-
- if (millis == 0 && nanos == 0)
- ++nanos;
-
- Thread *current = currentThread ();
-
- // We use a condition variable to implement sleeping so that an
- // interrupt can wake us up.
- natThread *nt = (natThread *) current->data;
- _Jv_MutexLock (&nt->join_mutex);
- _Jv_CondWait (&nt->join_cond, &nt->join_mutex, millis, nanos);
- _Jv_MutexUnlock (&nt->join_mutex);
-
- if (current->isInterrupted (true))
- throw new InterruptedException;
-}
-
-void
-java::lang::Thread::finish_ ()
-{
- natThread *nt = (natThread *) data;
-
- group->removeThread (this);
-
-#ifdef ENABLE_JVMPI
- if (_Jv_JVMPI_Notify_THREAD_END)
- {
- JVMPI_Event event;
-
- event.event_type = JVMPI_EVENT_THREAD_END;
- event.env_id = _Jv_GetCurrentJNIEnv ();
-
- _Jv_DisableGC ();
- (*_Jv_JVMPI_Notify_THREAD_END) (&event);
- _Jv_EnableGC ();
- }
-#endif
-
- group = NULL;
-
- // Signal any threads that are waiting to join() us.
- _Jv_MutexLock (&nt->join_mutex);
- alive_flag = false;
- _Jv_CondNotifyAll (&nt->join_cond, &nt->join_mutex);
- _Jv_MutexUnlock (&nt->join_mutex);
-}
-
-// Run once at thread startup, either when thread is attached or when
-// _Jv_ThreadRun is called.
-static void
-_Jv_NotifyThreadStart (java::lang::Thread* thread)
-{
-#ifdef ENABLE_JVMPI
- if (_Jv_JVMPI_Notify_THREAD_START)
- {
- JVMPI_Event event;
-
- jstring thread_name = thread->getName ();
- jstring group_name = NULL, parent_name = NULL;
- java::lang::ThreadGroup *group = thread->getThreadGroup ();
-
- if (group)
- {
- group_name = group->getName ();
- group = group->getParent ();
-
- if (group)
- parent_name = group->getName ();
- }
-
- int thread_len = thread_name ? JvGetStringUTFLength (thread_name) : 0;
- int group_len = group_name ? JvGetStringUTFLength (group_name) : 0;
- int parent_len = parent_name ? JvGetStringUTFLength (parent_name) : 0;
-
- char thread_chars[thread_len + 1];
- char group_chars[group_len + 1];
- char parent_chars[parent_len + 1];
-
- if (thread_name)
- JvGetStringUTFRegion (thread_name, 0,
- thread_name->length(), thread_chars);
- if (group_name)
- JvGetStringUTFRegion (group_name, 0,
- group_name->length(), group_chars);
- if (parent_name)
- JvGetStringUTFRegion (parent_name, 0,
- parent_name->length(), parent_chars);
-
- thread_chars[thread_len] = '\0';
- group_chars[group_len] = '\0';
- parent_chars[parent_len] = '\0';
-
- event.event_type = JVMPI_EVENT_THREAD_START;
- event.env_id = NULL;
- event.u.thread_start.thread_name = thread_chars;
- event.u.thread_start.group_name = group_chars;
- event.u.thread_start.parent_name = parent_chars;
- event.u.thread_start.thread_id = (jobjectID) thread;
- event.u.thread_start.thread_env_id = _Jv_GetCurrentJNIEnv ();
-
- _Jv_DisableGC ();
- (*_Jv_JVMPI_Notify_THREAD_START) (&event);
- _Jv_EnableGC ();
- }
-#endif
-}
-
-void
-_Jv_ThreadRun (java::lang::Thread* thread)
-{
- try
- {
- _Jv_NotifyThreadStart (thread);
- thread->run ();
- }
- catch (java::lang::Throwable *t)
- {
- // Uncaught exceptions are forwarded to the ThreadGroup. If
- // this results in an uncaught exception, that is ignored.
- try
- {
- thread->group->uncaughtException (thread, t);
- }
- catch (java::lang::Throwable *f)
- {
- // Nothing.
- }
- }
-
- thread->finish_ ();
-}
-
-void
-java::lang::Thread::start (void)
-{
- JvSynchronize sync (this);
-
- // Its illegal to re-start() a thread, even if its dead.
- if (!startable_flag)
- throw new IllegalThreadStateException;
-
- alive_flag = true;
- startable_flag = false;
- natThread *nt = (natThread *) data;
- _Jv_ThreadStart (this, nt->thread, (_Jv_ThreadStartFunc *) &_Jv_ThreadRun);
-}
-
-void
-java::lang::Thread::stop (java::lang::Throwable *)
-{
- throw new UnsupportedOperationException
- (JvNewStringLatin1 ("Thread.stop unimplemented"));
-}
-
-void
-java::lang::Thread::suspend (void)
-{
- checkAccess ();
- throw new UnsupportedOperationException
- (JvNewStringLatin1 ("Thread.suspend unimplemented"));
-}
-
-static int nextThreadNumber = 0;
-
-jstring
-java::lang::Thread::gen_name (void)
-{
- jint i;
- jclass sync = &java::lang::Thread::class$;
- {
- JvSynchronize dummy(sync);
- i = ++nextThreadNumber;
- }
-
- // Use an array large enough for "-2147483648"; i.e. 11 chars, + "Thread-".
- jchar buffer[7+11];
- jchar *bufend = (jchar *) ((char *) buffer + sizeof(buffer));
- i = _Jv_FormatInt (bufend, i);
- jchar *ptr = bufend - i;
- // Prepend "Thread-".
- *--ptr = '-';
- *--ptr = 'd';
- *--ptr = 'a';
- *--ptr = 'e';
- *--ptr = 'r';
- *--ptr = 'h';
- *--ptr = 'T';
- return JvNewString (ptr, bufend - ptr);
-}
-
-void
-java::lang::Thread::yield (void)
-{
- _Jv_ThreadYield ();
-}
-
-JNIEnv *
-_Jv_GetCurrentJNIEnv ()
-{
- java::lang::Thread *t = _Jv_ThreadCurrent ();
- if (t == NULL)
- return NULL;
- return ((natThread *) t->data)->jni_env;
-}
-
-void
-_Jv_SetCurrentJNIEnv (JNIEnv *env)
-{
- java::lang::Thread *t = _Jv_ThreadCurrent ();
- JvAssert (t != NULL);
- ((natThread *) t->data)->jni_env = env;
-}
-
-// Attach the current native thread to an existing (but unstarted) Thread
-// object. Returns -1 on failure, 0 upon success.
-jint
-_Jv_AttachCurrentThread(java::lang::Thread* thread)
-{
- if (thread == NULL || thread->startable_flag == false)
- return -1;
- thread->startable_flag = false;
- thread->alive_flag = true;
- natThread *nt = (natThread *) thread->data;
- _Jv_ThreadRegister (nt->thread);
- return 0;
-}
-
-java::lang::Thread*
-_Jv_AttachCurrentThread(jstring name, java::lang::ThreadGroup* group)
-{
- java::lang::Thread *thread = _Jv_ThreadCurrent ();
- if (thread != NULL)
- return thread;
- if (name == NULL)
- name = java::lang::Thread::gen_name ();
- thread = new java::lang::Thread (NULL, group, NULL, name);
- _Jv_AttachCurrentThread (thread);
- _Jv_NotifyThreadStart (thread);
- return thread;
-}
-
-jint
-_Jv_DetachCurrentThread (void)
-{
- java::lang::Thread *t = _Jv_ThreadCurrent ();
- if (t == NULL)
- return -1;
-
- _Jv_ThreadUnRegister ();
- // Release the monitors.
- t->finish_ ();
-
- return 0;
-}
projects / msp430-gcc.git / blobdiff