1 /* Vector API for GNU compiler.
2 Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
3 Contributed by Nathan Sidwell <nathan@codesourcery.com>
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
22 /* This file is compiled twice: once for the generator programs
23 once for the compiler. */
33 #include "coretypes.h"
43 /* Calculate the new ALLOC value, making sure that RESERVE slots are
44 free. If EXACT grow exactly, otherwise grow exponentially. */
46 static inline unsigned
47 calculate_allocation (const struct vec_prefix *pfx, int reserve, bool exact)
52 gcc_assert (reserve >= 0);
60 /* If there's no prefix, and we've not requested anything, then we
61 will create a NULL vector. */
64 /* We must have run out of room. */
65 gcc_assert (alloc - num < (unsigned) reserve);
69 alloc = num + reserve;
72 /* Exponential growth. */
76 /* Double when small. */
79 /* Grow slower when large. */
80 alloc = (alloc * 3 / 2);
82 /* If this is still too small, set it to the right size. */
83 if (alloc < num + reserve)
84 alloc = num + reserve;
89 /* Ensure there are at least RESERVE free slots in VEC. If EXACT grow
90 exactly, else grow exponentially. As a special case, if VEC is
91 NULL and RESERVE is 0, no vector will be created. The vector's
92 trailing array is at VEC_OFFSET offset and consists of ELT_SIZE
96 vec_gc_o_reserve_1 (void *vec, int reserve, size_t vec_offset, size_t elt_size,
97 bool exact MEM_STAT_DECL)
99 struct vec_prefix *pfx = vec;
100 unsigned alloc = alloc = calculate_allocation (pfx, reserve, exact);
105 vec = ggc_realloc_stat (vec, vec_offset + alloc * elt_size PASS_MEM_STAT);
106 ((struct vec_prefix *)vec)->alloc = alloc;
108 ((struct vec_prefix *)vec)->num = 0;
113 /* Ensure there are at least RESERVE free slots in VEC, growing
114 exponentially. If RESERVE < 0 grow exactly, else grow
115 exponentially. As a special case, if VEC is NULL, and RESERVE is
116 0, no vector will be created. */
119 vec_gc_p_reserve (void *vec, int reserve MEM_STAT_DECL)
121 return vec_gc_o_reserve_1 (vec, reserve,
122 offsetof (struct vec_prefix, vec),
123 sizeof (void *), false
127 /* Ensure there are at least RESERVE free slots in VEC, growing
128 exactly. If RESERVE < 0 grow exactly, else grow exponentially. As
129 a special case, if VEC is NULL, and RESERVE is 0, no vector will be
133 vec_gc_p_reserve_exact (void *vec, int reserve MEM_STAT_DECL)
135 return vec_gc_o_reserve_1 (vec, reserve,
136 offsetof (struct vec_prefix, vec),
137 sizeof (void *), true
141 /* As for vec_gc_p_reserve, but for object vectors. The vector's
142 trailing array is at VEC_OFFSET offset and consists of ELT_SIZE
146 vec_gc_o_reserve (void *vec, int reserve, size_t vec_offset, size_t elt_size
149 return vec_gc_o_reserve_1 (vec, reserve, vec_offset, elt_size, false
153 /* As for vec_gc_p_reserve_exact, but for object vectors. The
154 vector's trailing array is at VEC_OFFSET offset and consists of
155 ELT_SIZE sized elements. */
158 vec_gc_o_reserve_exact (void *vec, int reserve, size_t vec_offset,
159 size_t elt_size MEM_STAT_DECL)
161 return vec_gc_o_reserve_1 (vec, reserve, vec_offset, elt_size, true
165 /* As for vec_gc_o_reserve_1, but for heap allocated vectors. */
168 vec_heap_o_reserve_1 (void *vec, int reserve, size_t vec_offset,
169 size_t elt_size, bool exact MEM_STAT_DECL)
171 struct vec_prefix *pfx = vec;
172 unsigned alloc = calculate_allocation (pfx, reserve, exact);
177 vec = xrealloc (vec, vec_offset + alloc * elt_size);
178 ((struct vec_prefix *)vec)->alloc = alloc;
180 ((struct vec_prefix *)vec)->num = 0;
185 /* As for vec_gc_p_reserve, but for heap allocated vectors. */
188 vec_heap_p_reserve (void *vec, int reserve MEM_STAT_DECL)
190 return vec_heap_o_reserve_1 (vec, reserve,
191 offsetof (struct vec_prefix, vec),
192 sizeof (void *), false
196 /* As for vec_gc_p_reserve_exact, but for heap allocated vectors. */
199 vec_heap_p_reserve_exact (void *vec, int reserve MEM_STAT_DECL)
201 return vec_heap_o_reserve_1 (vec, reserve,
202 offsetof (struct vec_prefix, vec),
203 sizeof (void *), true
207 /* As for vec_gc_o_reserve, but for heap allocated vectors. */
210 vec_heap_o_reserve (void *vec, int reserve, size_t vec_offset, size_t elt_size
213 return vec_heap_o_reserve_1 (vec, reserve, vec_offset, elt_size, false
217 /* As for vec_gc_o_reserve_exact, but for heap allocated vectors. */
220 vec_heap_o_reserve_exact (void *vec, int reserve, size_t vec_offset,
221 size_t elt_size MEM_STAT_DECL)
223 return vec_heap_o_reserve_1 (vec, reserve, vec_offset, elt_size, true
228 /* Issue a vector domain error, and then fall over. */
231 vec_assert_fail (const char *op, const char *struct_name,
232 const char *file, unsigned int line, const char *function)
234 internal_error ("vector %s %s domain error, in %s at %s:%u",
235 struct_name, op, function, trim_filename (file), line);