LLP64: change signed long to sword_t
[sbcl.git] / src / runtime / gc-internal.h
1 /*
2  * garbage collection - shared definitions for modules "inside" the GC system
3  */
4
5 /*
6  * This software is part of the SBCL system. See the README file for
7  * more information.
8  *
9  * This software is derived from the CMU CL system, which was
10  * written at Carnegie Mellon University and released into the
11  * public domain. The software is in the public domain and is
12  * provided with absolutely no warranty. See the COPYING and CREDITS
13  * files for more information.
14  */
15
16 #ifndef _GC_INTERNAL_H_
17 #define _GC_INTERNAL_H_
18
19 #include <genesis/simple-fun.h>
20 #include "thread.h"
21 #include "interr.h"
22
23 #ifdef LISP_FEATURE_GENCGC
24 #include "gencgc-internal.h"
25 #else
26 #include "cheneygc-internal.h"
27 #endif
28
29 /* disabling gc assertions made no discernable difference to GC speed,
30  * last I tried it - dan 2003.12.21
31  *
32  * And it's unsafe to do so while things like gc_assert(0 ==
33  * thread_mutex_lock(&allocation_lock)) exist. - MG 2009-01-13
34  */
35 #if 1
36 # define gc_assert(ex)                                                 \
37 do {                                                                   \
38     if (!(ex)) gc_abort();                                             \
39 } while (0)
40 # define gc_assert_verbose(ex, fmt, ...)                               \
41 do {                                                                   \
42     if (!(ex)) {                                                       \
43         fprintf(stderr, fmt, ## __VA_ARGS__);                          \
44         gc_abort();                                                    \
45     }                                                                  \
46 } while (0)
47 #else
48 # define gc_assert(ex)
49 # define gc_assert_verbose(ex, fmt, ...)
50 #endif
51
52 #define gc_abort()                                                     \
53   lose("GC invariant lost, file \"%s\", line %d\n", __FILE__, __LINE__)
54
55 #define CEILING(x,y) (((x) + ((y) - 1)) & (~((y) - 1)))
56
57 static inline uword_t
58 NWORDS(uword_t x, uword_t n_bits)
59 {
60     /* A good compiler should be able to constant-fold this whole thing,
61        even with the conditional. */
62     if(n_bits <= N_WORD_BITS) {
63         uword_t elements_per_word = N_WORD_BITS/n_bits;
64
65         return CEILING(x, elements_per_word)/elements_per_word;
66     }
67     else {
68         /* FIXME: should have some sort of assertion that N_WORD_BITS
69            evenly divides n_bits */
70         return x * (n_bits/N_WORD_BITS);
71     }
72 }
73
74 /* FIXME: Shouldn't this be defined in sbcl.h? */
75
76 #if defined(LISP_FEATURE_SPARC)
77 #define FUN_RAW_ADDR_OFFSET 0
78 #else
79 #define FUN_RAW_ADDR_OFFSET (offsetof(struct simple_fun, code) - FUN_POINTER_LOWTAG)
80 #endif
81
82 /* values for the *_alloc_* parameters */
83 #define FREE_PAGE_FLAG 0
84 #define BOXED_PAGE_FLAG 1
85 #define UNBOXED_PAGE_FLAG 2
86 #define OPEN_REGION_PAGE_FLAG 4
87 #define CODE_PAGE_FLAG        (BOXED_PAGE_FLAG|UNBOXED_PAGE_FLAG)
88
89 #define ALLOC_BOXED 0
90 #define ALLOC_UNBOXED 1
91 #define ALLOC_QUICK 1
92
93 #ifdef LISP_FEATURE_GENCGC
94 #include "gencgc-alloc-region.h"
95 void *
96 gc_alloc_with_region(sword_t nbytes,int page_type_flag, struct alloc_region *my_region,
97                      int quick_p);
98 static inline void *
99 gc_general_alloc(sword_t nbytes, int page_type_flag, int quick_p)
100 {
101     struct alloc_region *my_region;
102     if (UNBOXED_PAGE_FLAG == page_type_flag) {
103         my_region = &unboxed_region;
104     } else if (BOXED_PAGE_FLAG & page_type_flag) {
105         my_region = &boxed_region;
106     } else {
107         lose("bad page type flag: %d", page_type_flag);
108     }
109     return gc_alloc_with_region(nbytes, page_type_flag, my_region, quick_p);
110 }
111 #else
112 extern void *gc_general_alloc(word_t nbytes,int page_type_flag,int quick_p);
113 #endif
114
115 static inline lispobj
116 gc_general_copy_object(lispobj object, long nwords, int page_type_flag)
117 {
118     lispobj *new;
119
120     gc_assert(is_lisp_pointer(object));
121     gc_assert(from_space_p(object));
122     gc_assert((nwords & 0x01) == 0);
123
124     /* Allocate space. */
125     new = gc_general_alloc(nwords*N_WORD_BYTES, page_type_flag, ALLOC_QUICK);
126
127     /* Copy the object. */
128     memcpy(new,native_pointer(object),nwords*N_WORD_BYTES);
129
130     return make_lispobj(new, lowtag_of(object));
131 }
132
133 extern sword_t (*scavtab[256])(lispobj *where, lispobj object);
134 extern lispobj (*transother[256])(lispobj object);
135 extern sword_t (*sizetab[256])(lispobj *where);
136
137 extern struct weak_pointer *weak_pointers; /* in gc-common.c */
138 extern struct hash_table *weak_hash_tables; /* in gc-common.c */
139
140 extern void scavenge(lispobj *start, sword_t n_words);
141 extern void scavenge_interrupt_contexts(struct thread *thread);
142 extern void scav_weak_hash_tables(void);
143 extern void scan_weak_hash_tables(void);
144 extern void scan_weak_pointers(void);
145
146 lispobj  copy_large_unboxed_object(lispobj object, sword_t nwords);
147 lispobj  copy_unboxed_object(lispobj object, sword_t nwords);
148 lispobj  copy_large_object(lispobj object, sword_t nwords);
149 lispobj  copy_object(lispobj object, sword_t nwords);
150 lispobj  copy_code_object(lispobj object, sword_t nwords);
151
152 lispobj *search_read_only_space(void *pointer);
153 lispobj *search_static_space(void *pointer);
154 lispobj *search_dynamic_space(void *pointer);
155
156 lispobj *gc_search_space(lispobj *start, size_t words, lispobj *pointer);
157
158 extern int looks_like_valid_lisp_pointer_p(lispobj pointer, lispobj *start_addr);
159
160 extern void scavenge_control_stack(struct thread *th);
161 extern void scrub_control_stack(void);
162 extern void scrub_thread_control_stack(struct thread *);
163
164 #include "fixnump.h"
165
166 #ifdef LISP_FEATURE_GENCGC
167 #include "gencgc-internal.h"
168 #else
169 #include "cheneygc-internal.h"
170 #endif
171
172 #if N_WORD_BITS == 32
173 # define SIMPLE_ARRAY_WORD_WIDETAG SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG
174 #elif N_WORD_BITS == 64
175 # define SIMPLE_ARRAY_WORD_WIDETAG SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG
176 #endif
177
178 #endif /* _GC_INTERNAL_H_ */