src/lj_vmevent.h

   1 /*
   2 ** VM event handling.
   3 ** Copyright (C) 2005-2014 Mike Pall. See Copyright Notice in luajit.h
   4 */
   5
   6 #ifndef _LJ_VMEVENT_H
   7 #define _LJ_VMEVENT_H
   8
   9 #include "lj_obj.h"
  10
  11 /* Registry key for VM event handler table. */
  12 #define LJ_VMEVENTS_REGKEY      "_VMEVENTS"
  13 #define LJ_VMEVENTS_HSIZE       4
  14
  15 #define VMEVENT_MASK(ev)        ((uint8_t)1 << ((int)(ev) & 7))
  16 #define VMEVENT_HASH(ev)        ((int)(ev) & ~7)
  17 #define VMEVENT_HASHIDX(h)      ((int)(h) << 3)
  18 #define VMEVENT_NOCACHE         255
  19
  20 #define VMEVENT_DEF(name, hash) \
  21   LJ_VMEVENT_##name##_, \
  22   LJ_VMEVENT_##name = ((LJ_VMEVENT_##name##_) & 7)|((hash) << 3)
  23
  24 /* VM event IDs. */
  25 typedef enum {
  26   VMEVENT_DEF(BC,       0x00003883),
  27   VMEVENT_DEF(TRACE,    0xb2d91467),
  28   VMEVENT_DEF(RECORD,   0x9284bf4f),
  29   VMEVENT_DEF(TEXIT,    0xb29df2b0),
  30   LJ_VMEVENT__MAX
  31 } VMEvent;
  32
  33 #ifdef LUAJIT_DISABLE_VMEVENT
  34 #define lj_vmevent_send(L, ev, args)            UNUSED(L)
  35 #define lj_vmevent_send_(L, ev, args, post)     UNUSED(L)
  36 #else
  37 #define lj_vmevent_send(L, ev, args) \
  38   if (G(L)->vmevmask & VMEVENT_MASK(LJ_VMEVENT_##ev)) { \
  39     ptrdiff_t argbase = lj_vmevent_prepare(L, LJ_VMEVENT_##ev); \
  40     if (argbase) { \
  41       args \
  42       lj_vmevent_call(L, argbase); \
  43     } \
  44   }
  45 #define lj_vmevent_send_(L, ev, args, post) \
  46   if (G(L)->vmevmask & VMEVENT_MASK(LJ_VMEVENT_##ev)) { \
  47     ptrdiff_t argbase = lj_vmevent_prepare(L, LJ_VMEVENT_##ev); \
  48     if (argbase) { \
  49       args \
  50       lj_vmevent_call(L, argbase); \
  51       post \
  52     } \
  53   }
  54
  55 LJ_FUNC ptrdiff_t lj_vmevent_prepare(lua_State *L, VMEvent ev);
  56 LJ_FUNC void lj_vmevent_call(lua_State *L, ptrdiff_t argbase);
  57 #endif
  58
  59 #endif