[vmkit-commits] [vmkit] r76370 - /vmkit/trunk/lib/JnJVM/VMCore/JNIReferences.h

[Nicolas Geoffray]

Author: geoffray
Date: Sun Jul 19 11:40:25 2009
New Revision: 76370

URL: http://llvm.org/viewvc/llvm-project?rev=76370&view=rev
Log:
Forgot this file from last commit.


Added:
    vmkit/trunk/lib/JnJVM/VMCore/JNIReferences.h

Added: vmkit/trunk/lib/JnJVM/VMCore/JNIReferences.h
URL: http://llvm.org/viewvc/llvm-project/vmkit/trunk/lib/JnJVM/VMCore/JNIReferences.h?rev=76370&view=auto

==============================================================================
--- vmkit/trunk/lib/JnJVM/VMCore/JNIReferences.h (added)
+++ vmkit/trunk/lib/JnJVM/VMCore/JNIReferences.h Sun Jul 19 11:40:25 2009
@@ -0,0 +1,88 @@
+//===--------- JNIReferences.cpp - Management of JNI references -----------===//
+//
+//                            The VMKit project
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef JNI_REFERENCES_H
+#define JNI_REFERENCES_H
+
+namespace jnjvm {
+
+class JavaObject;
+class JavaThread;
+
+#define MAXIMUM_REFERENCES 100
+
+class JNILocalReferences {
+  friend class JavaThread;
+
+private:
+  JNILocalReferences* prev;
+  uint32_t length;
+  JavaObject* localReferences[MAXIMUM_REFERENCES];
+
+public:
+  
+  JNILocalReferences() {
+    prev = 0;
+    length = 0;
+  }
+
+  JavaObject** addJNIReference(JavaThread* th, JavaObject* obj);
+
+  void removeJNIReferences(JavaThread* th, uint32_t num);
+
+};
+
+class JNIGlobalReferences {
+  friend class Jnjvm;
+
+private:
+  JNIGlobalReferences* next;
+  JNIGlobalReferences* prev;
+  uint32_t length;
+  uint32_t count;
+  JavaObject* globalReferences[MAXIMUM_REFERENCES];
+
+
+public:
+  JNIGlobalReferences() {
+    next = 0;
+    prev = 0;
+    length = 0;
+    count = 0;
+  }
+
+  JavaObject** addJNIReference(JavaObject* obj) {
+    if (length == MAXIMUM_REFERENCES) {
+      if (!next) {
+        next = new JNIGlobalReferences();
+        next->prev = this;
+      }
+      return next->addJNIReference(obj);
+    } else {
+      ++count;
+      globalReferences[length] = obj;
+      return &globalReferences[length++];
+    }
+  }
+
+  void removeJNIReference(JavaObject** obj) {
+    if (((uintptr_t)obj >= (uintptr_t)globalReferences) &&
+        ((uintptr_t)obj) < (uintptr_t)(globalReferences + MAXIMUM_REFERENCES)) {
+      *obj = 0;
+      --count;
+    } else {
+      assert(next && "No global reference located there");
+      next->removeJNIReference(obj);
+    }
+  }
+};
+
+}
+
+#endif