150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/* Vector API for GNU compiler.
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Copyright (C) 2004 Free Software Foundation, Inc.
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Contributed by Nathan Sidwell <nathan@codesourcery.com>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#include "config.h"
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#include "system.h"
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#include "ggc.h"
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#include "vec.h"
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#include "errors.h"
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#include "coretypes.h"
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#include "tree.h"
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struct vec_prefix
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{
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unsigned num;
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unsigned alloc;
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void *vec[1];
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};
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/* Ensure there are at least RESERVE free slots in VEC, if RESERVE >=
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0. If RESERVE < 0 increase the current allocation exponentially.
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VEC can be NULL, to create a new vector. */
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void *
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vec_gc_p_reserve (void *vec, int reserve MEM_STAT_DECL)
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{
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return vec_gc_o_reserve (vec, reserve,
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offsetof (struct vec_prefix, vec), sizeof (void *)
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PASS_MEM_STAT);
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}
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/* Ensure there are at least RESERVE free slots in VEC, if RESERVE >=
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0. If RESERVE < 0, increase the current allocation exponentially.
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VEC can be NULL, in which case a new vector is created. The
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vector's trailing array is at VEC_OFFSET offset and consists of
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ELT_SIZE sized elements. */
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void *
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vec_gc_o_reserve (void *vec, int reserve, size_t vec_offset, size_t elt_size
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MEM_STAT_DECL)
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{
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struct vec_prefix *pfx = vec;
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unsigned alloc = pfx ? pfx->num : 0;
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if (reserve >= 0)
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alloc += reserve;
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else if (alloc)
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alloc *= 2;
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else
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alloc = 4;
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if (pfx && pfx->alloc >= alloc)
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abort ();
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vec = ggc_realloc_stat (vec, vec_offset + alloc * elt_size PASS_MEM_STAT);
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((struct vec_prefix *)vec)->alloc = alloc;
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if (!pfx)
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((struct vec_prefix *)vec)->num = 0;
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return vec;
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}
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/* Explicitly release a vector. */
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void
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vec_gc_free (void *vec)
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{
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ggc_free (vec);
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}
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/* Ensure there are at least RESERVE free slots in VEC, if RESERVE >=
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0. If RESERVE < 0 increase the current allocation exponentially.
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VEC can be NULL, to create a new vector. */
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void *
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vec_heap_p_reserve (void *vec, int reserve MEM_STAT_DECL)
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{
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return vec_heap_o_reserve (vec, reserve,
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offsetof (struct vec_prefix, vec), sizeof (void *)
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PASS_MEM_STAT);
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}
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/* Ensure there are at least RESERVE free slots in VEC, if RESERVE >=
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0. If RESERVE < 0, increase the current allocation exponentially.
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VEC can be NULL, in which case a new vector is created. The
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vector's trailing array is at VEC_OFFSET offset and consists of
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ELT_SIZE sized elements. */
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void *
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vec_heap_o_reserve (void *vec, int reserve, size_t vec_offset, size_t elt_size
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MEM_STAT_DECL)
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{
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struct vec_prefix *pfx = vec;
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unsigned alloc = pfx ? pfx->num : 0;
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if (reserve >= 0)
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alloc += reserve;
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else if (alloc)
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alloc *= 2;
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else
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alloc = 4;
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if (pfx && pfx->alloc >= alloc)
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abort ();
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vec = xrealloc (vec, vec_offset + alloc * elt_size);
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((struct vec_prefix *)vec)->alloc = alloc;
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if (!pfx)
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((struct vec_prefix *)vec)->num = 0;
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return vec;
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}
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/* Explicitly release a vector. */
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void
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vec_heap_free (void *vec)
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{
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free (vec);
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}
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#if ENABLE_CHECKING
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/* Issue a vector domain error, and then fall over. */
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void
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vec_assert_fail (const char *op, const char *struct_name,
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const char *file, unsigned int line, const char *function)
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{
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internal_error ("vector %s %s domain error, in %s at %s:%u",
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struct_name, op, function, trim_filename (file), line);
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}
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#endif
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