isl_ctx.c

   1 /*
   2  * Copyright 2008-2009 Katholieke Universiteit Leuven
   3  *
   4  * Use of this software is governed by the GNU LGPLv2.1 license
   5  *
   6  * Written by Sven Verdoolaege, K.U.Leuven, Departement
   7  * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
   8  */
   9
  10 #include "isl_ctx.h"
  11 #include "isl_vec.h"
  12
  13 static struct isl_options *find_nested_isl_options(struct isl_arg *arg,
  14         void *opt)
  15 {
  16         int i;
  17         struct isl_options *options;
  18
  19         if (arg == isl_options_arg)
  20                 return opt;
  21
  22         for (i = 0; arg[i].type != isl_arg_end; ++i) {
  23                 if (arg[i].type != isl_arg_child)
  24                         continue;
  25                 options = find_nested_isl_options(arg[i].u.child.child,
  26                                     *(void **)(((char *)opt) + arg->offset));
  27                 if (options)
  28                         return options;
  29         }
  30
  31         return NULL;
  32 }
  33
  34 isl_ctx *isl_ctx_alloc_with_options(struct isl_arg *arg, void *user_opt)
  35 {
  36         struct isl_ctx *ctx = NULL;
  37         struct isl_options *opt = NULL;
  38         int opt_allocated = 0;
  39
  40         if (!user_opt)
  41                 return NULL;
  42
  43         opt = find_nested_isl_options(arg, user_opt);
  44         if (!opt) {
  45                 opt = isl_options_new_with_defaults();
  46                 if (!opt)
  47                         goto error;
  48                 opt_allocated = 1;
  49         }
  50
  51         ctx = isl_calloc_type(NULL, struct isl_ctx);
  52         if (!ctx)
  53                 goto error;
  54
  55         if (isl_hash_table_init(ctx, &ctx->name_hash, 0))
  56                 goto error;
  57
  58         ctx->stats = isl_calloc_type(ctx, struct isl_stats);
  59         if (!ctx->stats)
  60                 goto error;
  61
  62         ctx->user_arg = arg;
  63         ctx->user_opt = user_opt;
  64         ctx->opt_allocated = opt_allocated;
  65         ctx->opt = opt;
  66         ctx->ref = 0;
  67
  68         isl_int_init(ctx->zero);
  69         isl_int_set_si(ctx->zero, 0);
  70
  71         isl_int_init(ctx->one);
  72         isl_int_set_si(ctx->one, 1);
  73
  74         isl_int_init(ctx->negone);
  75         isl_int_set_si(ctx->negone, -1);
  76
  77         isl_int_init(ctx->normalize_gcd);
  78
  79         ctx->n_cached = 0;
  80
  81         return ctx;
  82 error:
  83         isl_arg_free(arg, user_opt);
  84         if (opt_allocated)
  85                 isl_options_free(opt);
  86         free(ctx);
  87         return NULL;
  88 }
  89
  90 struct isl_ctx *isl_ctx_alloc()
  91 {
  92         struct isl_options *opt;
  93
  94         opt = isl_options_new_with_defaults();
  95
  96         return isl_ctx_alloc_with_options(isl_options_arg, opt);
  97 }
  98
  99 void isl_ctx_ref(struct isl_ctx *ctx)
 100 {
 101         ctx->ref++;
 102 }
 103
 104 void isl_ctx_deref(struct isl_ctx *ctx)
 105 {
 106         isl_assert(ctx, ctx->ref > 0, return);
 107         ctx->ref--;
 108 }
 109
 110 void isl_ctx_free(struct isl_ctx *ctx)
 111 {
 112         if (!ctx)
 113                 return;
 114         isl_assert(ctx, ctx->ref == 0, return);
 115         isl_hash_table_clear(&ctx->name_hash);
 116         isl_blk_clear_cache(ctx);
 117         isl_int_clear(ctx->zero);
 118         isl_int_clear(ctx->one);
 119         isl_int_clear(ctx->negone);
 120         isl_int_clear(ctx->normalize_gcd);
 121         isl_arg_free(ctx->user_arg, ctx->user_opt);
 122         if (ctx->opt_allocated)
 123                 free(ctx->opt);
 124         free(ctx->stats);
 125         free(ctx);
 126 }
 127
 128 struct isl_options *isl_ctx_options(isl_ctx *ctx)
 129 {
 130         if (!ctx)
 131                 return NULL;
 132         return ctx->opt;
 133 }