Mercurial > hg > xemacs-beta
annotate src/gc.h @ 5159:cb303ff63e76
merge
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Fri, 19 Mar 2010 17:02:11 -0500 |
| parents | 80d74fed5399 |
| children | 6c6d78781d59 |
| rev | line source |
|---|---|
| 3092 | 1 /* New incremental garbage collector for XEmacs. |
| 2 Copyright (C) 2005 Marcus Crestani. | |
| 3 | |
| 4 This file is part of XEmacs. | |
| 5 | |
| 6 XEmacs is free software; you can redistribute it and/or modify it | |
| 7 under the terms of the GNU General Public License as published by the | |
| 8 Free Software Foundation; either version 2, or (at your option) any | |
| 9 later version. | |
| 10 | |
| 11 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
| 17 along with XEmacs; see the file COPYING. If not, write to | |
| 18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 19 Boston, MA 02111-1307, USA. */ | |
| 20 | |
| 21 /* Synched up with: Not in FSF. */ | |
| 22 | |
| 23 #ifndef INCLUDED_gc_h_ | |
| 24 #define INCLUDED_gc_h_ | |
| 25 | |
| 26 BEGIN_C_DECLS | |
| 27 | |
| 28 | |
| 29 #ifdef NEW_GC | |
| 30 /************************************************************************/ | |
| 31 /* Incremental Statistics */ | |
| 32 /************************************************************************/ | |
| 33 #ifdef ERROR_CHECK_GC | |
| 34 void gc_stat_print_stats (void); | |
| 35 void gc_stat_finalized (void); | |
| 36 void gc_stat_freed (void); | |
| 37 # define GC_STAT_FINALIZED gc_stat_finalized () | |
| 38 # define GC_STAT_FREED gc_stat_freed () | |
| 39 #else /* not ERROR_CHECK_GC */ | |
| 40 # define GC_STAT_FINALIZED | |
| 41 # define GC_STAT_FREED | |
| 42 #endif /* not ERROR_CHECK_GC */ | |
| 43 #endif /* not NEW_GC */ | |
| 44 | |
| 45 | |
| 46 /************************************************************************/ | |
| 47 /* Global Variables */ | |
| 48 /************************************************************************/ | |
| 49 /* Number of bytes of consing done since the last GC. */ | |
| 50 extern EMACS_INT consing_since_gc; | |
| 51 | |
| 52 /* Number of bytes of consing done since startup. */ | |
| 53 extern EMACS_UINT total_consing; | |
| 54 | |
| 55 /* Number of bytes of current allocated heap objects. */ | |
| 56 extern EMACS_INT total_gc_usage; | |
| 57 | |
| 58 /* If the above is set. */ | |
| 59 extern int total_gc_usage_set; | |
| 60 | |
| 61 /* Number of bytes of consing since gc before another gc should be done. */ | |
| 62 extern EMACS_INT gc_cons_threshold; | |
| 63 | |
| 64 /* Percentage of consing of total data size before another GC. */ | |
| 65 extern EMACS_INT gc_cons_percentage; | |
| 66 | |
| 67 #ifdef NEW_GC | |
| 68 /* Number of bytes of consing since gc before another cycle of the gc | |
| 69 should be done in incremental mode. */ | |
| 70 extern EMACS_INT gc_cons_incremental_threshold; | |
| 71 | |
| 72 /* Nonzero during gc */ | |
| 73 extern int gc_in_progress; | |
| 74 | |
| 75 /* Nonzero during write barrier */ | |
| 76 extern int write_barrier_enabled; | |
| 77 | |
| 78 /* Enable/disable incremental garbage collection during runtime. */ | |
| 79 extern int allow_incremental_gc; | |
| 80 #endif /* NEW_GC */ | |
| 81 | |
| 82 | |
| 83 /************************************************************************/ | |
| 84 /* Prototypes */ | |
| 85 /************************************************************************/ | |
| 86 | |
| 87 #ifndef MALLOC_OVERHEAD | |
|
4735
80d74fed5399
Remove "old" GNU malloc in src/malloc.c, and all references to it. Drop the
Jerry James <james@xemacs.org>
parents:
3313
diff
changeset
|
88 #ifndef SYSTEM_MALLOC |
| 3092 | 89 #define MALLOC_OVERHEAD 0 |
| 90 #elif defined (rcheck) | |
| 91 #define MALLOC_OVERHEAD 20 | |
| 92 #else | |
| 93 #define MALLOC_OVERHEAD 8 | |
| 94 #endif | |
| 95 #endif /* MALLOC_OVERHEAD */ | |
| 96 | |
| 97 #ifdef ERROR_CHECK_GC | |
| 98 #define GC_CHECK_LHEADER_INVARIANTS(lheader) do { \ | |
| 99 struct lrecord_header * GCLI_lh = (lheader); \ | |
| 100 assert (GCLI_lh != 0); \ | |
| 101 assert (GCLI_lh->type < (unsigned int) lrecord_type_count); \ | |
| 102 } while (0) | |
| 103 #else | |
| 104 #define GC_CHECK_LHEADER_INVARIANTS(lheader) | |
| 105 #endif | |
| 106 | |
| 107 void recompute_need_to_garbage_collect (void); | |
| 108 | |
| 109 | |
| 110 /* KKCC mark algorithm. */ | |
| 111 #ifdef DEBUG_XEMACS | |
| 112 void kkcc_gc_stack_push_lisp_object_1 (Lisp_Object obj, int level, int pos); | |
| 113 #define kkcc_gc_stack_push_lisp_object(obj, level, pos) \ | |
| 114 kkcc_gc_stack_push_lisp_object_1 (obj, level, pos) | |
| 115 void kkcc_gc_stack_repush_dirty_object_1 (Lisp_Object obj, int level, int pos); | |
| 116 #define kkcc_gc_stack_repush_dirty_object(obj) \ | |
| 117 kkcc_gc_stack_repush_dirty_object_1 (obj, 0, -2) | |
| 118 void kkcc_backtrace (void); | |
| 119 #else | |
| 120 void kkcc_gc_stack_push_lisp_object_1 (Lisp_Object obj); | |
| 121 #define kkcc_gc_stack_push_lisp_object(obj, level, pos) \ | |
| 122 kkcc_gc_stack_push_lisp_object_1 (obj) | |
| 123 void kkcc_gc_stack_repush_dirty_object_1 (Lisp_Object obj); | |
| 124 #define kkcc_gc_stack_repush_dirty_object(obj) \ | |
| 125 kkcc_gc_stack_repush_dirty_object_1 (obj) | |
| 126 #define kkcc_backtrace() | |
| 127 #endif | |
| 128 | |
| 129 #ifdef NEW_GC | |
| 130 | |
| 131 /* Repush objects that are caught by the write barrier. */ | |
| 132 #define gc_write_barrier(obj) kkcc_gc_stack_repush_dirty_object (obj); | |
| 133 | |
| 134 | |
| 135 /* GC functions: */ | |
| 136 | |
| 137 /* Perform a full garbage collection without interruption. If an | |
| 138 incremental garbage collection is already running it is completed | |
| 139 without further interruption. This function calls gc() with a | |
| 140 negative or zero argument. */ | |
| 141 void gc_full (void); | |
| 142 | |
| 143 /* This function starts an incremental garbage collection. If an | |
| 144 incremental garbage collection is already running, the next cycle | |
| 145 of traversal work is done, or the garbage collection is completed | |
| 146 when no more traversal work has to be done. This function calls gc | |
| 147 with a positive argument, indicating how many objects can be | |
| 148 traversed in this cycle. */ | |
| 149 void gc_incremental (void); | |
| 150 #endif /* NEW_GC */ | |
| 151 | |
| 152 /* Initializers */ | |
| 153 void init_gc_early (void); | |
| 154 void reinit_gc_early (void); | |
| 155 void init_gc_once_early (void); | |
| 156 | |
| 157 void syms_of_gc (void); | |
| 158 void vars_of_gc (void); | |
| 159 void complex_vars_of_gc (void); | |
| 160 | |
| 161 #ifndef NEW_GC | |
| 162 /* Needed prototypes due to the garbage collector code move from | |
| 163 alloc.c to gc.c. */ | |
| 164 void gc_sweep_1 (void); | |
| 165 | |
| 166 extern void *breathing_space; | |
| 167 #endif /* not NEW_GC */ | |
| 168 | |
| 3263 | 169 #ifdef NEW_GC |
| 170 void add_finalizable_obj (Lisp_Object obj); | |
| 171 void register_for_finalization (void); | |
| 172 void run_finalizers (void); | |
| 173 #endif /* NEW_GC */ | |
| 174 | |
| 3092 | 175 END_C_DECLS |
| 176 | |
| 177 #endif /* INCLUDED_gc_h_ */ |