swfdec/swfdec_as_context.h

   1 /* Swfdec
   2  * Copyright (C) 2007-2008 Benjamin Otte <otte@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301  USA
  18  */
  19
  20 #ifndef _SWFDEC_AS_CONTEXT_H_
  21 #define _SWFDEC_AS_CONTEXT_H_
  22
  23 #include <glib-object.h>
  24 #include <swfdec/swfdec_as_types.h>
  25
  26 G_BEGIN_DECLS
  27
  28 typedef enum {
  29   SWFDEC_AS_CONTEXT_NEW,
  30   SWFDEC_AS_CONTEXT_RUNNING,
  31   SWFDEC_AS_CONTEXT_INTERRUPTED,
  32   SWFDEC_AS_CONTEXT_ABORTED
  33 } SwfdecAsContextState;
  34
  35 typedef struct _SwfdecAsContextClass SwfdecAsContextClass;
  36
  37 #define SWFDEC_TYPE_AS_CONTEXT                    (swfdec_as_context_get_type())
  38 #define SWFDEC_IS_AS_CONTEXT(obj)                 (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SWFDEC_TYPE_AS_CONTEXT))
  39 #define SWFDEC_IS_AS_CONTEXT_CLASS(klass)         (G_TYPE_CHECK_CLASS_TYPE ((klass), SWFDEC_TYPE_AS_CONTEXT))
  40 #define SWFDEC_AS_CONTEXT(obj)                    (G_TYPE_CHECK_INSTANCE_CAST ((obj), SWFDEC_TYPE_AS_CONTEXT, SwfdecAsContext))
  41 #define SWFDEC_AS_CONTEXT_CLASS(klass)            (G_TYPE_CHECK_CLASS_CAST ((klass), SWFDEC_TYPE_AS_CONTEXT, SwfdecAsContextClass))
  42 #define SWFDEC_AS_CONTEXT_GET_CLASS(obj)          (G_TYPE_INSTANCE_GET_CLASS ((obj), SWFDEC_TYPE_AS_CONTEXT, SwfdecAsContextClass))
  43
  44 struct _SwfdecAsContext {
  45   GObject               object;
  46
  47   SwfdecAsContextState  state;          /* our current state */
  48   SwfdecAsObject *      global;         /* the global object or NULL if not initialized yet.
  49                                            In SwfdecPlayer is NULL unless a sandbox is in use */
  50   GRand *               rand;           /* random number generator */
  51   GTimeVal              start_time;     /* time this movie started (for GetTime action) */
  52
  53   /* GC properties */
  54   gsize                 memory_until_gc;/* amount of memory allocations that trigger a GC */
  55
  56   /* bookkeeping for GC */
  57   gsize                 memory;         /* total memory currently in use */
  58   gsize                 memory_since_gc;/* memory allocated since last GC run */
  59   GHashTable *          interned_strings;/* string => memory mapping the context manages */
  60   gpointer              gc_objects;     /* all SwfdecGcObjects the context manages */
  61   gpointer              objects;        /* all objects the context manages */
  62   gpointer              strings;        /* all strings the context manages */
  63   gpointer              numbers;        /* all numbers the context manages */
  64   gpointer              movies;         /* all movies the context manages */
  65   GHashTable *          constant_pools; /* memory address => SwfdecConstantPool for all gc'ed pools */
  66
  67   /* execution state */
  68   unsigned int          version;        /* currently active version */
  69   unsigned int          call_depth;     /* current depth of call stack (equals length of frame list) */
  70   SwfdecAsFrame *       frame;          /* topmost stack frame */
  71   gboolean              exception;      /* whether we are throwing an exception */
  72   SwfdecAsValue         exception_value; /* value of the exception being thrown, can be anything including undefined */
  73
  74   /* stack */
  75   SwfdecAsValue *       base;           /* stack base */
  76   SwfdecAsValue *       end;            /* end of stack */
  77   SwfdecAsValue *       cur;            /* pointer to current top of stack */
  78   SwfdecAsStack *       stack;          /* current stack */
  79
  80   /* debugging */
  81   SwfdecAsDebugger *    debugger;       /* debugger (or NULL if none) */
  82 };
  83
  84 struct _SwfdecAsContextClass {
  85   GObjectClass          object_class;
  86
  87   /* mark all objects that should not be collected */
  88   void                  (* mark)                (SwfdecAsContext *      context);
  89   /* overwrite if you want to report a different time than gettimeofday */
  90   void                  (* get_time)            (SwfdecAsContext *      context,
  91                                                  GTimeVal *             tv);
  92   /* overwrite if you want to abort on infinite loops */
  93   gboolean              (* check_continue)      (SwfdecAsContext *      context);
  94 };
  95
  96 GType           swfdec_as_context_get_type      (void);
  97
  98 void            swfdec_as_context_startup       (SwfdecAsContext *      context);
  99
 100 gboolean        swfdec_as_context_is_aborted    (SwfdecAsContext *      context);
 101 gboolean        swfdec_as_context_is_constructing
 102                                                 (SwfdecAsContext *      context);
 103 SwfdecAsFrame * swfdec_as_context_get_frame     (SwfdecAsContext *      context);
 104 void            swfdec_as_context_get_time      (SwfdecAsContext *      context,
 105                                                  GTimeVal *             tv);
 106 const char *    swfdec_as_context_get_string    (SwfdecAsContext *      context,
 107                                                  const char *           string);
 108 const char *    swfdec_as_context_give_string   (SwfdecAsContext *      context,
 109                                                  char *                 string);
 110
 111 void            swfdec_as_context_abort         (SwfdecAsContext *      context,
 112                                                  const char *           reason);
 113
 114 void            swfdec_as_context_throw         (SwfdecAsContext *      context,
 115                                                  const SwfdecAsValue *  value);
 116 gboolean        swfdec_as_context_catch         (SwfdecAsContext *      context,
 117                                                  SwfdecAsValue *        value);
 118
 119 gboolean        swfdec_as_context_try_use_mem   (SwfdecAsContext *      context,
 120                                                  gsize                  bytes);
 121 void            swfdec_as_context_use_mem       (SwfdecAsContext *      context,
 122                                                  gsize                  bytes);
 123 void            swfdec_as_context_unuse_mem     (SwfdecAsContext *      context,
 124                                                  gsize                  bytes);
 125 void            swfdec_as_value_mark            (SwfdecAsValue *        value);
 126 void            swfdec_as_string_mark           (const char *           string);
 127 void            swfdec_as_context_gc            (SwfdecAsContext *      context);
 128 void            swfdec_as_context_maybe_gc      (SwfdecAsContext *      context);
 129
 130
 131 G_END_DECLS
 132 #endif