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_options(struct isl_arg *arg,
  14         void *opt, struct isl_arg *wanted)
  15 {
  16         int i;
  17         struct isl_options *options;
  18
  19         if (arg == wanted)
  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_options(arg[i].u.child.child,
  26                                 *(void **)(((char *)opt) + arg->offset), wanted);
  27                 if (options)
  28                         return options;
  29         }
  30
  31         return NULL;
  32 }
  33
  34 static struct isl_options *find_nested_isl_options(struct isl_arg *arg,
  35         void *opt)
  36 {
  37         return find_nested_options(arg, opt, isl_options_arg);
  38 }
  39
  40 void *isl_ctx_peek_options(isl_ctx *ctx, struct isl_arg *arg)
  41 {
  42         if (!ctx)
  43                 return NULL;
  44         return find_nested_options(ctx->user_arg, ctx->user_opt, arg);
  45 }
  46
  47 isl_ctx *isl_ctx_alloc_with_options(struct isl_arg *arg, void *user_opt)
  48 {
  49         struct isl_ctx *ctx = NULL;
  50         struct isl_options *opt = NULL;
  51         int opt_allocated = 0;
  52
  53         if (!user_opt)
  54                 return NULL;
  55
  56         opt = find_nested_isl_options(arg, user_opt);
  57         if (!opt) {
  58                 opt = isl_options_new_with_defaults();
  59                 if (!opt)
  60                         goto error;
  61                 opt_allocated = 1;
  62         }
  63
  64         ctx = isl_calloc_type(NULL, struct isl_ctx);
  65         if (!ctx)
  66                 goto error;
  67
  68         if (isl_hash_table_init(ctx, &ctx->name_hash, 0))
  69                 goto error;
  70
  71         ctx->stats = isl_calloc_type(ctx, struct isl_stats);
  72         if (!ctx->stats)
  73                 goto error;
  74
  75         ctx->user_arg = arg;
  76         ctx->user_opt = user_opt;
  77         ctx->opt_allocated = opt_allocated;
  78         ctx->opt = opt;
  79         ctx->ref = 0;
  80
  81         isl_int_init(ctx->zero);
  82         isl_int_set_si(ctx->zero, 0);
  83
  84         isl_int_init(ctx->one);
  85         isl_int_set_si(ctx->one, 1);
  86
  87         isl_int_init(ctx->two);
  88         isl_int_set_si(ctx->two, 2);
  89
  90         isl_int_init(ctx->negone);
  91         isl_int_set_si(ctx->negone, -1);
  92
  93         isl_int_init(ctx->normalize_gcd);
  94
  95         ctx->n_cached = 0;
  96
  97         return ctx;
  98 error:
  99         isl_arg_free(arg, user_opt);
 100         if (opt_allocated)
 101                 isl_options_free(opt);
 102         free(ctx);
 103         return NULL;
 104 }
 105
 106 struct isl_ctx *isl_ctx_alloc()
 107 {
 108         struct isl_options *opt;
 109
 110         opt = isl_options_new_with_defaults();
 111
 112         return isl_ctx_alloc_with_options(isl_options_arg, opt);
 113 }
 114
 115 void isl_ctx_ref(struct isl_ctx *ctx)
 116 {
 117         ctx->ref++;
 118 }
 119
 120 void isl_ctx_deref(struct isl_ctx *ctx)
 121 {
 122         isl_assert(ctx, ctx->ref > 0, return);
 123         ctx->ref--;
 124 }
 125
 126 void isl_ctx_free(struct isl_ctx *ctx)
 127 {
 128         if (!ctx)
 129                 return;
 130         isl_assert(ctx, ctx->ref == 0, return);
 131         isl_hash_table_clear(&ctx->name_hash);
 132         isl_blk_clear_cache(ctx);
 133         isl_int_clear(ctx->zero);
 134         isl_int_clear(ctx->one);
 135         isl_int_clear(ctx->two);
 136         isl_int_clear(ctx->negone);
 137         isl_int_clear(ctx->normalize_gcd);
 138         isl_arg_free(ctx->user_arg, ctx->user_opt);
 139         if (ctx->opt_allocated)
 140                 free(ctx->opt);
 141         free(ctx->stats);
 142         free(ctx);
 143 }
 144
 145 struct isl_options *isl_ctx_options(isl_ctx *ctx)
 146 {
 147         if (!ctx)
 148                 return NULL;
 149         return ctx->opt;
 150 }