include/isl/ctx.h

   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 #ifndef ISL_CTX_H
  11 #define ISL_CTX_H
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15
  16 #include <isl/int.h>
  17 #include <isl/blk.h>
  18 #include <isl/arg.h>
  19 #include <isl/hash.h>
  20 #include <isl/config.h>
  21
  22 #ifndef __isl_give
  23 #define __isl_give
  24 #endif
  25 #ifndef __isl_take
  26 #define __isl_take
  27 #endif
  28 #ifndef __isl_keep
  29 #define __isl_keep
  30 #endif
  31 #ifndef __isl_export
  32 #define __isl_export
  33 #endif
  34 #ifndef __isl_constructor
  35 #define __isl_constructor
  36 #endif
  37 #ifndef __isl_subclass
  38 #define __isl_subclass(super)
  39 #endif
  40
  41 #ifdef GCC_WARN_UNUSED_RESULT
  42 #define WARN_UNUSED     GCC_WARN_UNUSED_RESULT
  43 #else
  44 #define WARN_UNUSED
  45 #endif
  46
  47 #if defined(__cplusplus)
  48 extern "C" {
  49 #endif
  50
  51 /* Nearly all isa functions require a struct isl_ctx allocated using
  52  * isl_ctx_alloc.  This ctx contains (or will contain) options that
  53  * control the behavior of the library and some caches.
  54  *
  55  * An object allocated within a given ctx should never be used inside
  56  * another ctx.  Functions for moving objects from one ctx to another
  57  * will be added as the need arises.
  58  *
  59  * A given context should only be used inside a single thread.
  60  * A global context for synchronization between different threads
  61  * as well as functions for moving a context to a different thread
  62  * will be added as the need arises.
  63  *
  64  * If anything goes wrong (out of memory, failed assertion), then
  65  * the library will currently simply abort.  This will be made
  66  * configurable in the future.
  67  * Users of the library should expect functions that return
  68  * a pointer to a structure, to return NULL, indicating failure.
  69  * Any function accepting a pointer to a structure will treat
  70  * a NULL argument as a failure, resulting in the function freeing
  71  * the remaining structures (if any) and returning NULL itself
  72  * (in case of pointer return type).
  73  * The only exception is the isl_ctx argument, which should never be NULL.
  74  */
  75 struct isl_stats {
  76         long    gbr_solved_lps;
  77 };
  78 enum isl_error {
  79         isl_error_none = 0,
  80         isl_error_abort,
  81         isl_error_unknown,
  82         isl_error_internal,
  83         isl_error_invalid,
  84         isl_error_unsupported
  85 };
  86 struct isl_ctx;
  87 typedef struct isl_ctx isl_ctx;
  88
  89 /* Some helper macros */
  90
  91 #define ISL_FL_INIT(l, f)   (l) = (f)               /* Specific flags location. */
  92 #define ISL_FL_SET(l, f)    ((l) |= (f))
  93 #define ISL_FL_CLR(l, f)    ((l) &= ~(f))
  94 #define ISL_FL_ISSET(l, f)  (!!((l) & (f)))
  95
  96 #define ISL_F_INIT(p, f)    ISL_FL_INIT((p)->flags, f)  /* Structure element flags. */
  97 #define ISL_F_SET(p, f)     ISL_FL_SET((p)->flags, f)
  98 #define ISL_F_CLR(p, f)     ISL_FL_CLR((p)->flags, f)
  99 #define ISL_F_ISSET(p, f)   ISL_FL_ISSET((p)->flags, f)
 100
 101 /* isl_check_ctx() checks at compile time if 'ctx' is of type 'isl_ctx *' and
 102  * returns the value of 'expr'. It is used to ensure, that always an isl_ctx is
 103  * passed to the following macros, even if they currently do not use it.
 104  */
 105 #define isl_check_ctx(ctx, expr)        ((ctx != (isl_ctx *) 0) ? expr : NULL)
 106
 107 #define isl_alloc(ctx,type,size)        ((type *)isl_check_ctx(ctx,\
 108                                                         malloc(size)))
 109 #define isl_calloc(ctx,type,size)       ((type *)isl_check_ctx(ctx,\
 110                                                         calloc(1, size)))
 111 #define isl_realloc(ctx,ptr,type,size)  ((type *)isl_check_ctx(ctx,\
 112                                                         realloc(ptr,size)))
 113 #define isl_alloc_type(ctx,type)        isl_alloc(ctx,type,sizeof(type))
 114 #define isl_calloc_type(ctx,type)       isl_calloc(ctx,type,sizeof(type))
 115 #define isl_realloc_type(ctx,ptr,type)  isl_realloc(ctx,ptr,type,sizeof(type))
 116 #define isl_alloc_array(ctx,type,n)     isl_alloc(ctx,type,(n)*sizeof(type))
 117 #define isl_calloc_array(ctx,type,n)    ((type *)isl_check_ctx(ctx,\
 118                                                 calloc(n, sizeof(type))))
 119 #define isl_realloc_array(ctx,ptr,type,n) \
 120                                     isl_realloc(ctx,ptr,type,(n)*sizeof(type))
 121
 122 #define isl_die(ctx,errno,msg,code)                                     \
 123         do {                                                            \
 124                 isl_handle_error(ctx, errno, msg, __FILE__, __LINE__);  \
 125                 code;                                                   \
 126         } while (0)
 127
 128 void isl_handle_error(isl_ctx *ctx, enum isl_error error, const char *msg,
 129         const char *file, int line);
 130
 131 #define isl_assert4(ctx,test,code,errno)                                \
 132         do {                                                            \
 133                 if (test)                                               \
 134                         break;                                          \
 135                 isl_die(ctx, errno, "Assertion \"" #test "\" failed", code);    \
 136         } while (0)
 137 #define isl_assert(ctx,test,code)                                       \
 138         isl_assert4(ctx,test,code,isl_error_unknown)
 139
 140 #define isl_min(a,b)                    ((a < b) ? (a) : (b))
 141
 142 /* struct isl_ctx functions */
 143
 144 struct isl_options *isl_ctx_options(isl_ctx *ctx);
 145
 146 isl_ctx *isl_ctx_alloc_with_options(struct isl_args *args,
 147         __isl_take void *opt);
 148 isl_ctx *isl_ctx_alloc(void);
 149 void *isl_ctx_peek_options(isl_ctx *ctx, struct isl_args *args);
 150 int isl_ctx_parse_options(isl_ctx *ctx, int argc, char **argv, unsigned flags);
 151 void isl_ctx_ref(struct isl_ctx *ctx);
 152 void isl_ctx_deref(struct isl_ctx *ctx);
 153 void isl_ctx_free(isl_ctx *ctx);
 154
 155 void isl_ctx_abort(isl_ctx *ctx);
 156 void isl_ctx_resume(isl_ctx *ctx);
 157 int isl_ctx_aborted(isl_ctx *ctx);
 158
 159 #define ISL_ARG_CTX_DECL(prefix,st,args)                                \
 160 st *isl_ctx_peek_ ## prefix(isl_ctx *ctx);
 161
 162 #define ISL_ARG_CTX_DEF(prefix,st,args)                                 \
 163 st *isl_ctx_peek_ ## prefix(isl_ctx *ctx)                               \
 164 {                                                                       \
 165         return (st *)isl_ctx_peek_options(ctx, &(args));                \
 166 }
 167
 168 #define ISL_CTX_GET_INT_DEF(prefix,st,args,field)                       \
 169 int prefix ## _get_ ## field(isl_ctx *ctx)                              \
 170 {                                                                       \
 171         st *options;                                                    \
 172         options = isl_ctx_peek_ ## prefix(ctx);                         \
 173         if (!options)                                                   \
 174                 isl_die(ctx, isl_error_invalid,                         \
 175                         "isl_ctx does not reference " #prefix,          \
 176                         return -1);                                     \
 177         return options->field;                                          \
 178 }
 179
 180 #define ISL_CTX_SET_INT_DEF(prefix,st,args,field)                       \
 181 int prefix ## _set_ ## field(isl_ctx *ctx, int val)                     \
 182 {                                                                       \
 183         st *options;                                                    \
 184         options = isl_ctx_peek_ ## prefix(ctx);                         \
 185         if (!options)                                                   \
 186                 isl_die(ctx, isl_error_invalid,                         \
 187                         "isl_ctx does not reference " #prefix,          \
 188                         return -1);                                     \
 189         options->field = val;                                           \
 190         return 0;                                                       \
 191 }
 192
 193 #define ISL_CTX_GET_STR_DEF(prefix,st,args,field)                       \
 194 const char *prefix ## _get_ ## field(isl_ctx *ctx)                      \
 195 {                                                                       \
 196         st *options;                                                    \
 197         options = isl_ctx_peek_ ## prefix(ctx);                         \
 198         if (!options)                                                   \
 199                 isl_die(ctx, isl_error_invalid,                         \
 200                         "isl_ctx does not reference " #prefix,          \
 201                         return NULL);                                   \
 202         return options->field;                                          \
 203 }
 204
 205 #define ISL_CTX_SET_STR_DEF(prefix,st,args,field)                       \
 206 int prefix ## _set_ ## field(isl_ctx *ctx, const char *val)             \
 207 {                                                                       \
 208         st *options;                                                    \
 209         options = isl_ctx_peek_ ## prefix(ctx);                         \
 210         if (!options)                                                   \
 211                 isl_die(ctx, isl_error_invalid,                         \
 212                         "isl_ctx does not reference " #prefix,          \
 213                         return -1);                                     \
 214         if (!val)                                                       \
 215                 return -1;                                              \
 216         free(options->field);                                           \
 217         options->field = strdup(val);                                   \
 218         if (!options->field)                                            \
 219                 return -1;                                              \
 220         return 0;                                                       \
 221 }
 222
 223 #define ISL_CTX_GET_BOOL_DEF(prefix,st,args,field)                      \
 224         ISL_CTX_GET_INT_DEF(prefix,st,args,field)
 225
 226 #define ISL_CTX_SET_BOOL_DEF(prefix,st,args,field)                      \
 227         ISL_CTX_SET_INT_DEF(prefix,st,args,field)
 228
 229 #define ISL_CTX_GET_CHOICE_DEF(prefix,st,args,field)                    \
 230         ISL_CTX_GET_INT_DEF(prefix,st,args,field)
 231
 232 #define ISL_CTX_SET_CHOICE_DEF(prefix,st,args,field)                    \
 233         ISL_CTX_SET_INT_DEF(prefix,st,args,field)
 234
 235 enum isl_error isl_ctx_last_error(isl_ctx *ctx);
 236 void isl_ctx_reset_error(isl_ctx *ctx);
 237 void isl_ctx_set_error(isl_ctx *ctx, enum isl_error error);
 238
 239 #if defined(__cplusplus)
 240 }
 241 #endif
 242
 243 #endif