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-rw-r--r--libjava/sun/misc/Service.h30
-rw-r--r--libjava/sun/misc/ServiceConfigurationError.h30
-rw-r--r--libjava/sun/misc/Unsafe.h53
-rw-r--r--libjava/sun/misc/Unsafe.java328
-rw-r--r--libjava/sun/misc/natUnsafe.cc253
5 files changed, 694 insertions, 0 deletions
diff --git a/libjava/sun/misc/Service.h b/libjava/sun/misc/Service.h
new file mode 100644
index 000000000..e698fed4b
--- /dev/null
+++ b/libjava/sun/misc/Service.h
@@ -0,0 +1,30 @@
+
+// DO NOT EDIT THIS FILE - it is machine generated -*- c++ -*-
+
+#ifndef __sun_misc_Service__
+#define __sun_misc_Service__
+
+#pragma interface
+
+#include <java/lang/Object.h>
+extern "Java"
+{
+ namespace sun
+ {
+ namespace misc
+ {
+ class Service;
+ }
+ }
+}
+
+class sun::misc::Service : public ::java::lang::Object
+{
+
+public:
+ Service();
+ static ::java::util::Iterator * providers(::java::lang::Class *, ::java::lang::ClassLoader *);
+ static ::java::lang::Class class$;
+};
+
+#endif // __sun_misc_Service__
diff --git a/libjava/sun/misc/ServiceConfigurationError.h b/libjava/sun/misc/ServiceConfigurationError.h
new file mode 100644
index 000000000..aee51b347
--- /dev/null
+++ b/libjava/sun/misc/ServiceConfigurationError.h
@@ -0,0 +1,30 @@
+
+// DO NOT EDIT THIS FILE - it is machine generated -*- c++ -*-
+
+#ifndef __sun_misc_ServiceConfigurationError__
+#define __sun_misc_ServiceConfigurationError__
+
+#pragma interface
+
+#include <java/lang/Error.h>
+extern "Java"
+{
+ namespace sun
+ {
+ namespace misc
+ {
+ class ServiceConfigurationError;
+ }
+ }
+}
+
+class sun::misc::ServiceConfigurationError : public ::java::lang::Error
+{
+
+public:
+ ServiceConfigurationError();
+ ServiceConfigurationError(::java::lang::String *);
+ static ::java::lang::Class class$;
+};
+
+#endif // __sun_misc_ServiceConfigurationError__
diff --git a/libjava/sun/misc/Unsafe.h b/libjava/sun/misc/Unsafe.h
new file mode 100644
index 000000000..d50c3e050
--- /dev/null
+++ b/libjava/sun/misc/Unsafe.h
@@ -0,0 +1,53 @@
+
+// DO NOT EDIT THIS FILE - it is machine generated -*- c++ -*-
+
+#ifndef __sun_misc_Unsafe__
+#define __sun_misc_Unsafe__
+
+#pragma interface
+
+#include <java/lang/Object.h>
+extern "Java"
+{
+ namespace sun
+ {
+ namespace misc
+ {
+ class Unsafe;
+ }
+ }
+}
+
+class sun::misc::Unsafe : public ::java::lang::Object
+{
+
+ Unsafe();
+public:
+ static ::sun::misc::Unsafe * getUnsafe();
+ virtual jlong objectFieldOffset(::java::lang::reflect::Field *);
+ virtual jboolean compareAndSwapInt(::java::lang::Object *, jlong, jint, jint);
+ virtual jboolean compareAndSwapLong(::java::lang::Object *, jlong, jlong, jlong);
+ virtual jboolean compareAndSwapObject(::java::lang::Object *, jlong, ::java::lang::Object *, ::java::lang::Object *);
+ virtual void putOrderedInt(::java::lang::Object *, jlong, jint);
+ virtual void putOrderedLong(::java::lang::Object *, jlong, jlong);
+ virtual void putOrderedObject(::java::lang::Object *, jlong, ::java::lang::Object *);
+ virtual void putIntVolatile(::java::lang::Object *, jlong, jint);
+ virtual jint getIntVolatile(::java::lang::Object *, jlong);
+ virtual void putLongVolatile(::java::lang::Object *, jlong, jlong);
+ virtual void putLong(::java::lang::Object *, jlong, jlong);
+ virtual jlong getLongVolatile(::java::lang::Object *, jlong);
+ virtual jlong getLong(::java::lang::Object *, jlong);
+ virtual void putObjectVolatile(::java::lang::Object *, jlong, ::java::lang::Object *);
+ virtual void putObject(::java::lang::Object *, jlong, ::java::lang::Object *);
+ virtual ::java::lang::Object * getObjectVolatile(::java::lang::Object *, jlong);
+ virtual jint arrayBaseOffset(::java::lang::Class *);
+ virtual jint arrayIndexScale(::java::lang::Class *);
+ virtual void unpark(::java::lang::Thread *);
+ virtual void park(jboolean, jlong);
+private:
+ static ::sun::misc::Unsafe * unsafe;
+public:
+ static ::java::lang::Class class$;
+};
+
+#endif // __sun_misc_Unsafe__
diff --git a/libjava/sun/misc/Unsafe.java b/libjava/sun/misc/Unsafe.java
new file mode 100644
index 000000000..fa199f83e
--- /dev/null
+++ b/libjava/sun/misc/Unsafe.java
@@ -0,0 +1,328 @@
+/* Unsafe.java - Unsafe operations needed for concurrency
+ Copyright (C) 2006 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+package sun.misc;
+
+import java.lang.reflect.Field;
+
+/**
+ * This class should provide access to low-level operations and its
+ * use should be limited to trusted code. Fields can be accessed using
+ * memory addresses, with undefined behaviour occurring if invalid memory
+ * addresses are given.
+ *
+ * @author Tom Tromey (tromey@redhat.com)
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ */
+public class Unsafe
+{
+ // Singleton class.
+ private static Unsafe unsafe = new Unsafe();
+
+ /**
+ * Private default constructor to prevent creation of an arbitrary
+ * number of instances.
+ */
+ private Unsafe()
+ {
+ }
+
+ /**
+ * Retrieve the singleton instance of <code>Unsafe</code>. The calling
+ * method should guard this instance from untrusted code, as it provides
+ * access to low-level operations such as direct memory access.
+ *
+ * @throws SecurityException if a security manager exists and prevents
+ * access to the system properties.
+ */
+ public static Unsafe getUnsafe()
+ {
+ SecurityManager sm = System.getSecurityManager();
+ if (sm != null)
+ sm.checkPropertiesAccess();
+ return unsafe;
+ }
+
+ /**
+ * Returns the memory address offset of the given static field.
+ * The offset is merely used as a means to access a particular field
+ * in the other methods of this class. The value is unique to the given
+ * field and the same value should be returned on each subsequent call.
+ *
+ * @param field the field whose offset should be returned.
+ * @return the offset of the given field.
+ */
+ public native long objectFieldOffset(Field field);
+
+ /**
+ * Compares the value of the integer field at the specified offset
+ * in the supplied object with the given expected value, and updates
+ * it if they match. The operation of this method should be atomic,
+ * thus providing an uninterruptible way of updating an integer field.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the integer field within <code>obj</code>.
+ * @param expect the expected value of the field.
+ * @param update the new value of the field if it equals <code>expect</code>.
+ * @return true if the field was changed.
+ */
+ public native boolean compareAndSwapInt(Object obj, long offset,
+ int expect, int update);
+
+ /**
+ * Compares the value of the long field at the specified offset
+ * in the supplied object with the given expected value, and updates
+ * it if they match. The operation of this method should be atomic,
+ * thus providing an uninterruptible way of updating a long field.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the long field within <code>obj</code>.
+ * @param expect the expected value of the field.
+ * @param update the new value of the field if it equals <code>expect</code>.
+ * @return true if the field was changed.
+ */
+ public native boolean compareAndSwapLong(Object obj, long offset,
+ long expect, long update);
+
+ /**
+ * Compares the value of the object field at the specified offset
+ * in the supplied object with the given expected value, and updates
+ * it if they match. The operation of this method should be atomic,
+ * thus providing an uninterruptible way of updating an object field.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the object field within <code>obj</code>.
+ * @param expect the expected value of the field.
+ * @param update the new value of the field if it equals <code>expect</code>.
+ * @return true if the field was changed.
+ */
+ public native boolean compareAndSwapObject(Object obj, long offset,
+ Object expect, Object update);
+
+ /**
+ * Sets the value of the integer field at the specified offset in the
+ * supplied object to the given value. This is an ordered or lazy
+ * version of <code>putIntVolatile(Object,long,int)</code>, which
+ * doesn't guarantee the immediate visibility of the change to other
+ * threads. It is only really useful where the integer field is
+ * <code>volatile</code>, and is thus expected to change unexpectedly.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the integer field within <code>obj</code>.
+ * @param value the new value of the field.
+ * @see #putIntVolatile(Object,long,int)
+ */
+ public native void putOrderedInt(Object obj, long offset, int value);
+
+ /**
+ * Sets the value of the long field at the specified offset in the
+ * supplied object to the given value. This is an ordered or lazy
+ * version of <code>putLongVolatile(Object,long,long)</code>, which
+ * doesn't guarantee the immediate visibility of the change to other
+ * threads. It is only really useful where the long field is
+ * <code>volatile</code>, and is thus expected to change unexpectedly.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the long field within <code>obj</code>.
+ * @param value the new value of the field.
+ * @see #putLongVolatile(Object,long,long)
+ */
+ public native void putOrderedLong(Object obj, long offset, long value);
+
+ /**
+ * Sets the value of the object field at the specified offset in the
+ * supplied object to the given value. This is an ordered or lazy
+ * version of <code>putObjectVolatile(Object,long,Object)</code>, which
+ * doesn't guarantee the immediate visibility of the change to other
+ * threads. It is only really useful where the object field is
+ * <code>volatile</code>, and is thus expected to change unexpectedly.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the object field within <code>obj</code>.
+ * @param value the new value of the field.
+ */
+ public native void putOrderedObject(Object obj, long offset, Object value);
+
+ /**
+ * Sets the value of the integer field at the specified offset in the
+ * supplied object to the given value, with volatile store semantics.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the integer field within <code>obj</code>.
+ * @param value the new value of the field.
+ */
+ public native void putIntVolatile(Object obj, long offset, int value);
+
+ /**
+ * Retrieves the value of the integer field at the specified offset in the
+ * supplied object with volatile load semantics.
+ *
+ * @param obj the object containing the field to read.
+ * @param offset the offset of the integer field within <code>obj</code>.
+ */
+ public native int getIntVolatile(Object obj, long offset);
+
+ /**
+ * Sets the value of the long field at the specified offset in the
+ * supplied object to the given value, with volatile store semantics.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the long field within <code>obj</code>.
+ * @param value the new value of the field.
+ * @see #putLong(Object,long,long)
+ */
+ public native void putLongVolatile(Object obj, long offset, long value);
+
+ /**
+ * Sets the value of the long field at the specified offset in the
+ * supplied object to the given value.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the long field within <code>obj</code>.
+ * @param value the new value of the field.
+ * @see #putLongVolatile(Object,long,long)
+ */
+ public native void putLong(Object obj, long offset, long value);
+
+ /**
+ * Retrieves the value of the long field at the specified offset in the
+ * supplied object with volatile load semantics.
+ *
+ * @param obj the object containing the field to read.
+ * @param offset the offset of the long field within <code>obj</code>.
+ * @see #getLong(Object,long)
+ */
+ public native long getLongVolatile(Object obj, long offset);
+
+ /**
+ * Retrieves the value of the long field at the specified offset in the
+ * supplied object.
+ *
+ * @param obj the object containing the field to read.
+ * @param offset the offset of the long field within <code>obj</code>.
+ * @see #getLongVolatile(Object,long)
+ */
+ public native long getLong(Object obj, long offset);
+
+ /**
+ * Sets the value of the object field at the specified offset in the
+ * supplied object to the given value, with volatile store semantics.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the object field within <code>obj</code>.
+ * @param value the new value of the field.
+ * @see #putObject(Object,long,Object)
+ */
+ public native void putObjectVolatile(Object obj, long offset, Object value);
+
+ /**
+ * Sets the value of the object field at the specified offset in the
+ * supplied object to the given value.
+ *
+ * @param obj the object containing the field to modify.
+ * @param offset the offset of the object field within <code>obj</code>.
+ * @param value the new value of the field.
+ * @see #putObjectVolatile(Object,long,Object)
+ */
+ public native void putObject(Object obj, long offset, Object value);
+
+ /**
+ * Retrieves the value of the object field at the specified offset in the
+ * supplied object with volatile load semantics.
+ *
+ * @param obj the object containing the field to read.
+ * @param offset the offset of the object field within <code>obj</code>.
+ */
+ public native Object getObjectVolatile(Object obj, long offset);
+
+ /**
+ * Returns the offset of the first element for a given array class.
+ * To access elements of the array class, this value may be used along
+ * with that returned by
+ * <a href="#arrayIndexScale"><code>arrayIndexScale</code></a>,
+ * if non-zero.
+ *
+ * @param arrayClass the class for which the first element's address should
+ * be obtained.
+ * @return the offset of the first element of the array class.
+ * @see arrayIndexScale(Class)
+ */
+ public native int arrayBaseOffset(Class arrayClass);
+
+ /**
+ * Returns the scale factor used for addressing elements of the supplied
+ * array class. Where a suitable scale factor can not be returned (e.g.
+ * for primitive types), zero should be returned. The returned value
+ * can be used with
+ * <a href="#arrayBaseOffset"><code>arrayBaseOffset</code></a>
+ * to access elements of the class.
+ *
+ * @param arrayClass the class whose scale factor should be returned.
+ * @return the scale factor, or zero if not supported for this array class.
+ */
+ public native int arrayIndexScale(Class arrayClass);
+
+ /**
+ * Releases the block on a thread created by
+ * <a href="#park"><code>park</code></a>. This method can also be used
+ * to terminate a blockage caused by a prior call to <code>park</code>.
+ * This operation is unsafe, as the thread must be guaranteed to be
+ * live. This is true of Java, but not native code.
+ *
+ * @param thread the thread to unblock.
+ */
+ public native void unpark(Thread thread);
+
+ /**
+ * Blocks the thread until a matching
+ * <a href="#unpark"><code>unpark</code></a> occurs, the thread is
+ * interrupted or the optional timeout expires. If an <code>unpark</code>
+ * call has already occurred, this also counts. A timeout value of zero
+ * is defined as no timeout. When <code>isAbsolute</code> is
+ * <code>true</code>, the timeout is in milliseconds relative to the
+ * epoch. Otherwise, the value is the number of nanoseconds which must
+ * occur before timeout. This call may also return spuriously (i.e.
+ * for no apparent reason).
+ *
+ * @param isAbsolute true if the timeout is specified in milliseconds from
+ * the epoch.
+ * @param time either the number of nanoseconds to wait, or a time in
+ * milliseconds from the epoch to wait for.
+ */
+ public native void park(boolean isAbsolute, long time);
+
+}
diff --git a/libjava/sun/misc/natUnsafe.cc b/libjava/sun/misc/natUnsafe.cc
new file mode 100644
index 000000000..0bd2d21ea
--- /dev/null
+++ b/libjava/sun/misc/natUnsafe.cc
@@ -0,0 +1,253 @@
+// natUnsafe.cc - Implementation of sun.misc.Unsafe native methods.
+
+/* Copyright (C) 2006, 2007
+ 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 <gcj/cni.h>
+#include <gcj/field.h>
+#include <gcj/javaprims.h>
+#include <jvm.h>
+#include <sun/misc/Unsafe.h>
+#include <java/lang/System.h>
+#include <java/lang/InterruptedException.h>
+
+#include <java/lang/Thread.h>
+#include <java/lang/Long.h>
+
+#include "sysdep/locks.h"
+
+// Use a spinlock for multi-word accesses
+class spinlock
+{
+ static volatile obj_addr_t lock;
+
+public:
+
+spinlock ()
+ {
+ while (! compare_and_swap (&lock, 0, 1))
+ _Jv_ThreadYield ();
+ }
+ ~spinlock ()
+ {
+ release_set (&lock, 0);
+ }
+};
+
+// This is a single lock that is used for all synchronized accesses if
+// the compiler can't generate inline compare-and-swap operations. In
+// most cases it'll never be used, but the i386 needs it for 64-bit
+// locked accesses and so does PPC32. It's worth building libgcj with
+// target=i486 (or above) to get the inlines.
+volatile obj_addr_t spinlock::lock;
+
+
+static inline bool
+compareAndSwap (volatile jint *addr, jint old, jint new_val)
+{
+ jboolean result = false;
+ spinlock lock;
+ if ((result = (*addr == old)))
+ *addr = new_val;
+ return result;
+}
+
+static inline bool
+compareAndSwap (volatile jlong *addr, jlong old, jlong new_val)
+{
+ jboolean result = false;
+ spinlock lock;
+ if ((result = (*addr == old)))
+ *addr = new_val;
+ return result;
+}
+
+static inline bool
+compareAndSwap (volatile jobject *addr, jobject old, jobject new_val)
+{
+ jboolean result = false;
+ spinlock lock;
+ if ((result = (*addr == old)))
+ *addr = new_val;
+ return result;
+}
+
+
+jlong
+sun::misc::Unsafe::objectFieldOffset (::java::lang::reflect::Field *field)
+{
+ _Jv_Field *fld = _Jv_FromReflectedField (field);
+ // FIXME: what if it is not an instance field?
+ return fld->getOffset();
+}
+
+jint
+sun::misc::Unsafe::arrayBaseOffset (jclass arrayClass)
+{
+ // FIXME: assert that arrayClass is array.
+ jclass eltClass = arrayClass->getComponentType();
+ return (jint)(jlong) _Jv_GetArrayElementFromElementType (NULL, eltClass);
+}
+
+jint
+sun::misc::Unsafe::arrayIndexScale (jclass arrayClass)
+{
+ // FIXME: assert that arrayClass is array.
+ jclass eltClass = arrayClass->getComponentType();
+ if (eltClass->isPrimitive())
+ return eltClass->size();
+ return sizeof (void *);
+}
+
+// These methods are used when the compiler fails to generate inline
+// versions of the compare-and-swap primitives.
+
+jboolean
+sun::misc::Unsafe::compareAndSwapInt (jobject obj, jlong offset,
+ jint expect, jint update)
+{
+ jint *addr = (jint *)((char *)obj + offset);
+ return compareAndSwap (addr, expect, update);
+}
+
+jboolean
+sun::misc::Unsafe::compareAndSwapLong (jobject obj, jlong offset,
+ jlong expect, jlong update)
+{
+ volatile jlong *addr = (jlong*)((char *) obj + offset);
+ return compareAndSwap (addr, expect, update);
+}
+
+jboolean
+sun::misc::Unsafe::compareAndSwapObject (jobject obj, jlong offset,
+ jobject expect, jobject update)
+{
+ jobject *addr = (jobject*)((char *) obj + offset);
+ return compareAndSwap (addr, expect, update);
+}
+
+void
+sun::misc::Unsafe::putOrderedInt (jobject obj, jlong offset, jint value)
+{
+ volatile jint *addr = (jint *) ((char *) obj + offset);
+ *addr = value;
+}
+
+void
+sun::misc::Unsafe::putOrderedLong (jobject obj, jlong offset, jlong value)
+{
+ volatile jlong *addr = (jlong *) ((char *) obj + offset);
+ spinlock lock;
+ *addr = value;
+}
+
+void
+sun::misc::Unsafe::putOrderedObject (jobject obj, jlong offset, jobject value)
+{
+ volatile jobject *addr = (jobject *) ((char *) obj + offset);
+ *addr = value;
+}
+
+void
+sun::misc::Unsafe::putIntVolatile (jobject obj, jlong offset, jint value)
+{
+ write_barrier ();
+ volatile jint *addr = (jint *) ((char *) obj + offset);
+ *addr = value;
+}
+
+void
+sun::misc::Unsafe::putLongVolatile (jobject obj, jlong offset, jlong value)
+{
+ volatile jlong *addr = (jlong *) ((char *) obj + offset);
+ spinlock lock;
+ *addr = value;
+}
+
+void
+sun::misc::Unsafe::putObjectVolatile (jobject obj, jlong offset, jobject value)
+{
+ write_barrier ();
+ volatile jobject *addr = (jobject *) ((char *) obj + offset);
+ *addr = value;
+}
+
+#if 0 // FIXME
+void
+sun::misc::Unsafe::putInt (jobject obj, jlong offset, jint value)
+{
+ jint *addr = (jint *) ((char *) obj + offset);
+ *addr = value;
+}
+#endif
+
+void
+sun::misc::Unsafe::putLong (jobject obj, jlong offset, jlong value)
+{
+ jlong *addr = (jlong *) ((char *) obj + offset);
+ spinlock lock;
+ *addr = value;
+}
+
+void
+sun::misc::Unsafe::putObject (jobject obj, jlong offset, jobject value)
+{
+ jobject *addr = (jobject *) ((char *) obj + offset);
+ *addr = value;
+}
+
+jint
+sun::misc::Unsafe::getIntVolatile (jobject obj, jlong offset)
+{
+ volatile jint *addr = (jint *) ((char *) obj + offset);
+ jint result = *addr;
+ read_barrier ();
+ return result;
+}
+
+jobject
+sun::misc::Unsafe::getObjectVolatile (jobject obj, jlong offset)
+{
+ volatile jobject *addr = (jobject *) ((char *) obj + offset);
+ jobject result = *addr;
+ read_barrier ();
+ return result;
+}
+
+jlong
+sun::misc::Unsafe::getLong (jobject obj, jlong offset)
+{
+ jlong *addr = (jlong *) ((char *) obj + offset);
+ spinlock lock;
+ return *addr;
+}
+
+jlong
+sun::misc::Unsafe::getLongVolatile (jobject obj, jlong offset)
+{
+ volatile jlong *addr = (jlong *) ((char *) obj + offset);
+ spinlock lock;
+ return *addr;
+}
+
+void
+sun::misc::Unsafe::unpark (::java::lang::Thread *thread)
+{
+ natThread *nt = (natThread *) thread->data;
+ nt->park_helper.unpark ();
+}
+
+void
+sun::misc::Unsafe::park (jboolean isAbsolute, jlong time)
+{
+ using namespace ::java::lang;
+ Thread *thread = Thread::currentThread();
+ natThread *nt = (natThread *) thread->data;
+ nt->park_helper.park (isAbsolute, time);
+}