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1 | /* Garbage collection for the GNU compiler. Internal definitions |
2 | for ggc-*.c and stringpool.c. | |
3 | ||
4 | Copyright (C) 2009, 2010 Free Software Foundation, Inc. | |
5 | ||
6 | This file is part of GCC. | |
7 | ||
8 | GCC is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
10 | Software Foundation; either version 3, or (at your option) any later | |
11 | version. | |
12 | ||
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GCC; see the file COPYING3. If not see | |
20 | <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #ifndef GCC_GGC_INTERNAL_H | |
23 | #define GCC_GGC_INTERNAL_H | |
24 | ||
25 | #include "ggc.h" | |
26 | ||
27 | /* Call ggc_set_mark on all the roots. */ | |
28 | extern void ggc_mark_roots (void); | |
29 | ||
30 | /* Stringpool. */ | |
31 | ||
32 | /* Mark the entries in the string pool. */ | |
33 | extern void ggc_mark_stringpool (void); | |
34 | ||
35 | /* Purge the entries in the string pool. */ | |
36 | extern void ggc_purge_stringpool (void); | |
37 | ||
38 | /* Save and restore the string pool entries for PCH. */ | |
39 | ||
40 | extern void gt_pch_save_stringpool (void); | |
41 | extern void gt_pch_fixup_stringpool (void); | |
42 | extern void gt_pch_restore_stringpool (void); | |
43 | ||
44 | /* PCH and GGC handling for strings, mostly trivial. */ | |
45 | extern void gt_pch_p_S (void *, void *, gt_pointer_operator, void *); | |
46 | ||
47 | /* PCH. */ | |
48 | ||
49 | struct ggc_pch_data; | |
50 | ||
51 | /* Return a new ggc_pch_data structure. */ | |
52 | extern struct ggc_pch_data *init_ggc_pch (void); | |
53 | ||
54 | /* The second parameter and third parameters give the address and size | |
55 | of an object. Update the ggc_pch_data structure with as much of | |
56 | that information as is necessary. The bool argument should be true | |
57 | if the object is a string. */ | |
58 | extern void ggc_pch_count_object (struct ggc_pch_data *, void *, size_t, bool, | |
59 | enum gt_types_enum); | |
60 | ||
61 | /* Return the total size of the data to be written to hold all | |
62 | the objects previously passed to ggc_pch_count_object. */ | |
63 | extern size_t ggc_pch_total_size (struct ggc_pch_data *); | |
64 | ||
65 | /* The objects, when read, will most likely be at the address | |
66 | in the second parameter. */ | |
67 | extern void ggc_pch_this_base (struct ggc_pch_data *, void *); | |
68 | ||
69 | /* Assuming that the objects really do end up at the address | |
70 | passed to ggc_pch_this_base, return the address of this object. | |
71 | The bool argument should be true if the object is a string. */ | |
72 | extern char *ggc_pch_alloc_object (struct ggc_pch_data *, void *, size_t, bool, | |
73 | enum gt_types_enum); | |
74 | ||
75 | /* Write out any initial information required. */ | |
76 | extern void ggc_pch_prepare_write (struct ggc_pch_data *, FILE *); | |
77 | ||
78 | /* Write out this object, including any padding. The last argument should be | |
79 | true if the object is a string. */ | |
80 | extern void ggc_pch_write_object (struct ggc_pch_data *, FILE *, void *, | |
81 | void *, size_t, bool); | |
82 | ||
83 | /* All objects have been written, write out any final information | |
84 | required. */ | |
85 | extern void ggc_pch_finish (struct ggc_pch_data *, FILE *); | |
86 | ||
87 | /* A PCH file has just been read in at the address specified second | |
88 | parameter. Set up the GC implementation for the new objects. */ | |
89 | extern void ggc_pch_read (FILE *, void *); | |
90 | ||
91 | ||
92 | /* Allocation and collection. */ | |
93 | ||
94 | /* When set, ggc_collect will do collection. */ | |
95 | extern bool ggc_force_collect; | |
96 | ||
97 | extern void ggc_record_overhead (size_t, size_t, void * MEM_STAT_DECL); | |
98 | ||
99 | extern void ggc_free_overhead (void *); | |
100 | ||
101 | extern void ggc_prune_overhead_list (void); | |
102 | ||
103 | /* Return the number of bytes allocated at the indicated address. */ | |
104 | extern size_t ggc_get_size (const void *); | |
105 | ||
106 | ||
107 | /* Statistics. */ | |
108 | ||
109 | /* This structure contains the statistics common to all collectors. | |
110 | Particular collectors can extend this structure. */ | |
111 | typedef struct ggc_statistics | |
112 | { | |
113 | /* At present, we don't really gather any interesting statistics. */ | |
114 | int unused; | |
115 | } ggc_statistics; | |
116 | ||
117 | /* Used by the various collectors to gather and print statistics that | |
118 | do not depend on the collector in use. */ | |
119 | extern void ggc_print_common_statistics (FILE *, ggc_statistics *); | |
120 | ||
121 | #endif |