libjava/include/execution.h

   1 // execution.h - Execution engines. -*- c++ -*-
   2
   3 /* Copyright (C) 2004, 2006  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 #ifndef __JAVA_EXECUTION_H__
  12 #define __JAVA_EXECUTION_H__
  13
  14 // This represents one execution engine.  Note that we use function
  15 // pointers and not virtual methods to avoid calls to
  16 // __cxa_call_unexpected and the like.
  17 struct _Jv_ExecutionEngine
  18 {
  19  public:
  20
  21   void (*unregister) (jclass);
  22   // FIXME: probably should handle this elsewhere, see how
  23   // interpreter does it.
  24   bool (*need_resolve_string_fields) ();
  25   void (*verify) (jclass);
  26   void (*allocate_static_fields) (jclass, int, int);
  27   void (*create_ncode) (jclass);
  28   _Jv_ResolvedMethod *(*resolve_method) (_Jv_Method *, jclass,
  29                                          jboolean, jint);
  30   void (*post_miranda_hook) (jclass);
  31 };
  32
  33 // This handles all gcj-compiled code, including BC ABI.
  34 struct _Jv_CompiledEngine : public _Jv_ExecutionEngine
  35 {
  36  public:
  37
  38   static void do_unregister (jclass)
  39   {
  40   }
  41
  42   static bool do_need_resolve_string_fields ()
  43   {
  44     return true;
  45   }
  46
  47   static void do_verify (jclass klass)
  48   {
  49     _Jv_Linker::verify_type_assertions (klass);
  50   }
  51
  52   static _Jv_ResolvedMethod *do_resolve_method (_Jv_Method *, jclass,
  53                                                 jboolean, jint)
  54   {
  55     return NULL;
  56   }
  57
  58   static void do_allocate_static_fields (jclass, int, int)
  59   {
  60     // Compiled classes don't need this.
  61   }
  62
  63   static void do_create_ncode (jclass)
  64   {
  65     // Not needed.
  66   }
  67
  68   static void do_post_miranda_hook (jclass)
  69   {
  70     // Not needed.
  71   }
  72
  73   _Jv_CompiledEngine ()
  74   {
  75     unregister = do_unregister;
  76     need_resolve_string_fields = do_need_resolve_string_fields;
  77     verify = do_verify;
  78     allocate_static_fields = do_allocate_static_fields;
  79     create_ncode = do_create_ncode;
  80     resolve_method = do_resolve_method;
  81     post_miranda_hook = do_post_miranda_hook;
  82   }
  83
  84   // These operators make it so we don't have to link in libstdc++.
  85   void *operator new (size_t bytes)
  86   {
  87     return _Jv_Malloc(bytes);
  88   }
  89
  90   void operator delete (void *mem)
  91   {
  92     _Jv_Free(mem);
  93   }
  94 };
  95
  96 // This handles interpreted code.
  97 class _Jv_InterpreterEngine : public _Jv_ExecutionEngine
  98 {
  99  public:
 100
 101   static void do_verify (jclass);
 102   static void do_allocate_static_fields (jclass, int, int);
 103   static void do_create_ncode (jclass);
 104   static _Jv_ResolvedMethod *do_resolve_method (_Jv_Method *, jclass,
 105                                                 jboolean, jint);
 106
 107   static bool do_need_resolve_string_fields ()
 108   {
 109     return false;
 110   }
 111
 112   static void do_unregister(jclass klass)
 113   {
 114     _Jv_UnregisterClass(klass);
 115   }
 116
 117   static void do_post_miranda_hook (jclass);
 118
 119   _Jv_InterpreterEngine ()
 120   {
 121     unregister = do_unregister;
 122     need_resolve_string_fields = do_need_resolve_string_fields;
 123     verify = do_verify;
 124     allocate_static_fields = do_allocate_static_fields;
 125     create_ncode = do_create_ncode;
 126     resolve_method = do_resolve_method;
 127     post_miranda_hook = do_post_miranda_hook;
 128   }
 129
 130   // These operators make it so we don't have to link in libstdc++.
 131   void *operator new (size_t bytes)
 132   {
 133     return _Jv_Malloc(bytes);
 134   }
 135
 136   void operator delete (void *mem)
 137   {
 138     _Jv_Free(mem);
 139   }
 140 };
 141
 142
 143 extern _Jv_InterpreterEngine _Jv_soleInterpreterEngine;
 144 extern _Jv_CompiledEngine _Jv_soleCompiledEngine;
 145
 146 #endif // __JAVA_EXECUTION_H__