libjava/include/jvm.h

   1 // jvm.h - Header file for private implementation information. -*- c++ -*-
   2
   3 /* Copyright (C) 1998, 1999  Cygnus Solutions
   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_JVM_H__
  12 #define __JAVA_JVM_H__
  13
  14 #include <gcj/javaprims.h>
  15
  16 #include <java-assert.h>
  17 #include <java-threads.h>
  18 // Must include java-gc.h before Object.h for the implementation.
  19 #include <java-gc.h>
  20
  21 #include <java/lang/Object.h>
  22
  23 // Include cni.h before field.h to enable all definitions.  FIXME.
  24 #include <gcj/cni.h>
  25 #include <gcj/field.h>
  26
  27 /* Structure of the virtual table.  */
  28 struct _Jv_VTable
  29 {
  30   jclass clas;
  31   void *method[1];
  32 };
  33
  34 /* Extract a character from a Java-style Utf8 string.
  35  * PTR points to the current character.
  36  * LIMIT points to the end of the Utf8 string.
  37  * PTR is incremented to point after the character thta gets returns.
  38  * On an error, -1 is returned. */
  39 #define UTF8_GET(PTR, LIMIT) \
  40   ((PTR) >= (LIMIT) ? -1 \
  41    : *(PTR) < 128 ? *(PTR)++ \
  42    : (*(PTR)&0xE0) == 0xC0 && ((PTR)+=2)<=(LIMIT) && ((PTR)[-1]&0xC0) == 0x80 \
  43    ? (((PTR)[-2] & 0x1F) << 6) + ((PTR)[-1] & 0x3F) \
  44    : (*(PTR) & 0xF0) == 0xE0 && ((PTR) += 3) <= (LIMIT) \
  45    && ((PTR)[-2] & 0xC0) == 0x80 && ((PTR)[-1] & 0xC0) == 0x80 \
  46    ? (((PTR)[-3]&0x0F) << 12) + (((PTR)[-2]&0x3F) << 6) + ((PTR)[-1]&0x3F) \
  47    : ((PTR)++, -1))
  48
  49 extern int _Jv_strLengthUtf8(char* str, int len);
  50
  51 typedef struct _Jv_Utf8Const Utf8Const;
  52 _Jv_Utf8Const *_Jv_makeUtf8Const (char *s, int len);
  53 _Jv_Utf8Const *_Jv_makeUtf8Const (jstring string);
  54 extern jboolean _Jv_equalUtf8Consts (_Jv_Utf8Const *, _Jv_Utf8Const *);
  55 extern jboolean _Jv_equal (_Jv_Utf8Const *, jstring, jint);
  56
  57 #define StringClass _CL_Q34java4lang6String
  58 extern java::lang::Class StringClass;
  59
  60 /* Type of pointer used as finalizer.  */
  61 typedef void _Jv_FinalizerFunc (jobject);
  62
  63 /* Allocate space for a new Java object.  */
  64 void *_Jv_AllocObj (jsize size);
  65 /* Allocate space for an array of Java objects.  */
  66 void *_Jv_AllocArray (jsize size);
  67 /* Allocate space that is known to be pointer-free.  */
  68 void *_Jv_AllocBytes (jsize size);
  69 /* Initialize the GC.  */
  70 void _Jv_InitGC (void);
  71 /* Register a finalizer.  */
  72 void _Jv_RegisterFinalizer (void *object, _Jv_FinalizerFunc *method);
  73
  74 /* Run finalizers for objects ready to be finalized..  */
  75 void _Jv_RunFinalizers (void);
  76 /* Run all finalizers.  Should be called only before exit.  */
  77 void _Jv_RunAllFinalizers (void);
  78 /* Perform a GC.  */
  79 void _Jv_RunGC (void);
  80
  81 /* Return approximation of total size of heap.  */
  82 long _Jv_GCTotalMemory (void);
  83 /* Return approximation of total free memory.  */
  84 long _Jv_GCFreeMemory (void);
  85
  86 /* Set initial heap size.  If SIZE==0, ignore.  Should be run before
  87    _Jv_InitGC.  Not required to have any actual effect.  */
  88 void _Jv_GCSetInitialHeapSize (size_t size);
  89
  90 /* Set maximum heap size.  If SIZE==0, unbounded.  Should be run
  91    before _Jv_InitGC.  Not required to have any actual effect.  */
  92 void _Jv_GCSetMaximumHeapSize (size_t size);
  93
  94 /* External interface to setting the heap size.  Parses ARG (a number
  95    which can optionally have "k" or "m" appended and calls
  96    _Jv_GCSetInitialHeapSize.  */
  97 void _Jv_SetInitialHeapSize (const char *arg);
  98
  99 /* External interface to setting the maximum heap size.  Parses ARG (a
 100    number which can optionally have "k" or "m" appended and calls
 101    _Jv_GCSetMaximumHeapSize.  */
 102 void _Jv_SetMaximumHeapSize (const char *arg);
 103
 104 /* Allocate some unscanned bytes.  Throw exception if out of memory.  */
 105 void *_Jv_AllocBytesChecked (jsize size);
 106
 107 extern "C" void JvRunMain (jclass klass, int argc, const char **argv);
 108 void _Jv_RunMain (const char* name, int argc, const char **argv);
 109
 110 // This function is used to determine the hash code of an object.
 111 inline jint
 112 _Jv_HashCode (jobject obj)
 113 {
 114   return (jint) obj;
 115 }
 116
 117 extern "C" void _Jv_ThrowBadArrayIndex (jint bad_index);
 118 extern "C" jobject _Jv_NewArray (jint type, jint size);
 119 extern "C" jobject _Jv_NewMultiArray (jclass klass, jint dims, ...);
 120 extern "C" void *_Jv_CheckCast (jclass klass, jobject obj);
 121 extern "C" void *_Jv_LookupInterfaceMethod (jclass klass, Utf8Const *name,
 122                                             Utf8Const *signature);
 123 extern "C" void _Jv_CheckArrayStore (jobject array, jobject obj);
 124 extern "C" void _Jv_RegisterClass (jclass klass);
 125 extern "C" void _Jv_RegisterClasses (jclass *classes);
 126 extern void _Jv_UnregisterClass (_Jv_Utf8Const*, java::lang::ClassLoader*);
 127
 128 extern jclass _Jv_FindClass (_Jv_Utf8Const *name,
 129                              java::lang::ClassLoader *loader);
 130 extern jclass _Jv_FindClassFromSignature (char *,
 131                                           java::lang::ClassLoader *loader);
 132
 133 extern jobject _Jv_NewMultiArray (jclass, jint ndims, jint* dims);
 134
 135 /* Checked divide subroutines. */
 136 extern "C"
 137 {
 138   jint _Jv_divI (jint, jint);
 139   jint _Jv_remI (jint, jint);
 140   jlong _Jv_divJ (jlong, jlong);
 141   jlong _Jv_remJ (jlong, jlong);
 142 }
 143
 144 #endif /* __JAVA_JVM_H__ */