isl_ctx.c

   1 /*
   2  * Copyright 2008-2009 Katholieke Universiteit Leuven
   3  *
   4  * Use of this software is governed by the MIT 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_private.h>
  11 #include <isl/vec.h>
  12 #include <isl_options_private.h>
  13
  14 #define __isl_calloc(type,size)         ((type *)calloc(1, size))
  15 #define __isl_calloc_type(type)         __isl_calloc(type,sizeof(type))
  16
  17 /* Check that the result of an allocation ("p") is not NULL and
  18  * complain if it is.
  19  * The only exception is when allocation size ("size") is equal to zero.
  20  */
  21 static void *check_non_null(isl_ctx *ctx, void *p, size_t size)
  22 {
  23         if (p || size == 0)
  24                 return p;
  25         isl_die(ctx, isl_error_alloc, "allocation failure", return NULL);
  26 }
  27
  28 /* Call malloc and complain if it fails.
  29  * If ctx is NULL, then return NULL.
  30  */
  31 void *isl_malloc_or_die(isl_ctx *ctx, size_t size)
  32 {
  33         return ctx ? check_non_null(ctx, malloc(size), size) : NULL;
  34 }
  35
  36 /* Call calloc and complain if it fails.
  37  * If ctx is NULL, then return NULL.
  38  */
  39 void *isl_calloc_or_die(isl_ctx *ctx, size_t nmemb, size_t size)
  40 {
  41         return ctx ? check_non_null(ctx, calloc(nmemb, size), nmemb) : NULL;
  42 }
  43
  44 /* Call realloc and complain if it fails.
  45  * If ctx is NULL, then return NULL.
  46  */
  47 void *isl_realloc_or_die(isl_ctx *ctx, void *ptr, size_t size)
  48 {
  49         return ctx ? check_non_null(ctx, realloc(ptr, size), size) : NULL;
  50 }
  51
  52 void isl_handle_error(isl_ctx *ctx, enum isl_error error, const char *msg,
  53         const char *file, int line)
  54 {
  55         if (!ctx)
  56                 return;
  57
  58         isl_ctx_set_error(ctx, error);
  59
  60         switch (ctx->opt->on_error) {
  61         case ISL_ON_ERROR_WARN:
  62                 fprintf(stderr, "%s:%d: %s\n", file, line, msg);
  63                 return;
  64         case ISL_ON_ERROR_CONTINUE:
  65                 return;
  66         case ISL_ON_ERROR_ABORT:
  67                 fprintf(stderr, "%s:%d: %s\n", file, line, msg);
  68                 abort();
  69                 return;
  70         }
  71 }
  72
  73 static struct isl_options *find_nested_options(struct isl_args *args,
  74         void *opt, struct isl_args *wanted)
  75 {
  76         int i;
  77         struct isl_options *options;
  78
  79         if (args == wanted)
  80                 return opt;
  81
  82         for (i = 0; args->args[i].type != isl_arg_end; ++i) {
  83                 struct isl_arg *arg = &args->args[i];
  84                 void *child;
  85
  86                 if (arg->type != isl_arg_child)
  87                         continue;
  88
  89                 if (arg->offset == (size_t) -1)
  90                         child = opt;
  91                 else
  92                         child = *(void **)(((char *)opt) + arg->offset);
  93
  94                 options = find_nested_options(arg->u.child.child,
  95                                                 child, wanted);
  96                 if (options)
  97                         return options;
  98         }
  99
 100         return NULL;
 101 }
 102
 103 static struct isl_options *find_nested_isl_options(struct isl_args *args,
 104         void *opt)
 105 {
 106         return find_nested_options(args, opt, &isl_options_args);
 107 }
 108
 109 void *isl_ctx_peek_options(isl_ctx *ctx, struct isl_args *args)
 110 {
 111         if (!ctx)
 112                 return NULL;
 113         if (args == &isl_options_args)
 114                 return ctx->opt;
 115         return find_nested_options(ctx->user_args, ctx->user_opt, args);
 116 }
 117
 118 isl_ctx *isl_ctx_alloc_with_options(struct isl_args *args, void *user_opt)
 119 {
 120         struct isl_ctx *ctx = NULL;
 121         struct isl_options *opt = NULL;
 122         int opt_allocated = 0;
 123
 124         if (!user_opt)
 125                 return NULL;
 126
 127         opt = find_nested_isl_options(args, user_opt);
 128         if (!opt) {
 129                 opt = isl_options_new_with_defaults();
 130                 if (!opt)
 131                         goto error;
 132                 opt_allocated = 1;
 133         }
 134
 135         ctx = __isl_calloc_type(struct isl_ctx);
 136         if (!ctx)
 137                 goto error;
 138
 139         if (isl_hash_table_init(ctx, &ctx->id_table, 0))
 140                 goto error;
 141
 142         ctx->stats = isl_calloc_type(ctx, struct isl_stats);
 143         if (!ctx->stats)
 144                 goto error;
 145
 146         ctx->user_args = args;
 147         ctx->user_opt = user_opt;
 148         ctx->opt_allocated = opt_allocated;
 149         ctx->opt = opt;
 150         ctx->ref = 0;
 151
 152         isl_int_init(ctx->zero);
 153         isl_int_set_si(ctx->zero, 0);
 154
 155         isl_int_init(ctx->one);
 156         isl_int_set_si(ctx->one, 1);
 157
 158         isl_int_init(ctx->two);
 159         isl_int_set_si(ctx->two, 2);
 160
 161         isl_int_init(ctx->negone);
 162         isl_int_set_si(ctx->negone, -1);
 163
 164         isl_int_init(ctx->normalize_gcd);
 165
 166         ctx->n_cached = 0;
 167         ctx->n_miss = 0;
 168
 169         ctx->error = isl_error_none;
 170
 171         return ctx;
 172 error:
 173         isl_args_free(args, user_opt);
 174         if (opt_allocated)
 175                 isl_options_free(opt);
 176         free(ctx);
 177         return NULL;
 178 }
 179
 180 struct isl_ctx *isl_ctx_alloc()
 181 {
 182         struct isl_options *opt;
 183
 184         opt = isl_options_new_with_defaults();
 185
 186         return isl_ctx_alloc_with_options(&isl_options_args, opt);
 187 }
 188
 189 void isl_ctx_ref(struct isl_ctx *ctx)
 190 {
 191         ctx->ref++;
 192 }
 193
 194 void isl_ctx_deref(struct isl_ctx *ctx)
 195 {
 196         isl_assert(ctx, ctx->ref > 0, return);
 197         ctx->ref--;
 198 }
 199
 200 void isl_ctx_free(struct isl_ctx *ctx)
 201 {
 202         if (!ctx)
 203                 return;
 204         if (ctx->ref != 0)
 205                 isl_die(ctx, isl_error_invalid,
 206                         "isl_ctx freed, but some objects still reference it",
 207                         return);
 208
 209         isl_hash_table_clear(&ctx->id_table);
 210         isl_blk_clear_cache(ctx);
 211         isl_int_clear(ctx->zero);
 212         isl_int_clear(ctx->one);
 213         isl_int_clear(ctx->two);
 214         isl_int_clear(ctx->negone);
 215         isl_int_clear(ctx->normalize_gcd);
 216         isl_args_free(ctx->user_args, ctx->user_opt);
 217         if (ctx->opt_allocated)
 218                 isl_options_free(ctx->opt);
 219         free(ctx->stats);
 220         free(ctx);
 221 }
 222
 223 struct isl_options *isl_ctx_options(isl_ctx *ctx)
 224 {
 225         if (!ctx)
 226                 return NULL;
 227         return ctx->opt;
 228 }
 229
 230 enum isl_error isl_ctx_last_error(isl_ctx *ctx)
 231 {
 232         return ctx->error;
 233 }
 234
 235 void isl_ctx_reset_error(isl_ctx *ctx)
 236 {
 237         ctx->error = isl_error_none;
 238 }
 239
 240 void isl_ctx_set_error(isl_ctx *ctx, enum isl_error error)
 241 {
 242         if (ctx)
 243                 ctx->error = error;
 244 }
 245
 246 void isl_ctx_abort(isl_ctx *ctx)
 247 {
 248         if (ctx)
 249                 ctx->abort = 1;
 250 }
 251
 252 void isl_ctx_resume(isl_ctx *ctx)
 253 {
 254         if (ctx)
 255                 ctx->abort = 0;
 256 }
 257
 258 int isl_ctx_aborted(isl_ctx *ctx)
 259 {
 260         return ctx ? ctx->abort : -1;
 261 }
 262
 263 int isl_ctx_parse_options(isl_ctx *ctx, int argc, char **argv, unsigned flags)
 264 {
 265         if (!ctx)
 266                 return -1;
 267         return isl_args_parse(ctx->user_args, argc, argv, ctx->user_opt, flags);
 268 }