include/isl/ctx.h

   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 #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/options.h>
  18 #include <isl/blk.h>
  19 #include <isl/hash.h>
  20 #include <isl/config.h>
  21
  22 #define __isl_give
  23 #define __isl_take
  24 #define __isl_keep
  25
  26 #ifdef GCC_WARN_UNUSED_RESULT
  27 #define WARN_UNUSED     GCC_WARN_UNUSED_RESULT
  28 #else
  29 #define WARN_UNUSED
  30 #endif
  31
  32 #if defined(__cplusplus)
  33 extern "C" {
  34 #endif
  35
  36 /* Nearly all isa functions require a struct isl_ctx allocated using
  37  * isl_ctx_alloc.  This ctx contains (or will contain) options that
  38  * control the behavior of the library and some caches.
  39  *
  40  * An object allocated within a given ctx should never be used inside
  41  * another ctx.  Functions for moving objects from one ctx to another
  42  * will be added as the need arises.
  43  *
  44  * A given context should only be used inside a single thread.
  45  * A global context for synchronization between different threads
  46  * as well as functions for moving a context to a different thread
  47  * will be added as the need arises.
  48  *
  49  * If anything goes wrong (out of memory, failed assertion), then
  50  * the library will currently simply abort.  This will be made
  51  * configurable in the future.
  52  * Users of the library should expect functions that return
  53  * a pointer to a structure, to return NULL, indicating failure.
  54  * Any function accepting a pointer to a structure will treat
  55  * a NULL argument as a failure, resulting in the function freeing
  56  * the remaining structures (if any) and returning NULL itself
  57  * (in case of pointer return type).
  58  * The only exception is the isl_ctx argument, which should never be NULL.
  59  */
  60 struct isl_stats {
  61         long    gbr_solved_lps;
  62 };
  63 enum isl_error {
  64         isl_error_none = 0,
  65         isl_error_abort,
  66         isl_error_unknown,
  67         isl_error_internal,
  68         isl_error_invalid,
  69         isl_error_unsupported
  70 };
  71 struct isl_ctx;
  72 typedef struct isl_ctx isl_ctx;
  73
  74 /* Some helper macros */
  75
  76 #define ISL_FL_INIT(l, f)   (l) = (f)               /* Specific flags location. */
  77 #define ISL_FL_SET(l, f)    ((l) |= (f))
  78 #define ISL_FL_CLR(l, f)    ((l) &= ~(f))
  79 #define ISL_FL_ISSET(l, f)  (!!((l) & (f)))
  80
  81 #define ISL_F_INIT(p, f)    ISL_FL_INIT((p)->flags, f)  /* Structure element flags. */
  82 #define ISL_F_SET(p, f)     ISL_FL_SET((p)->flags, f)
  83 #define ISL_F_CLR(p, f)     ISL_FL_CLR((p)->flags, f)
  84 #define ISL_F_ISSET(p, f)   ISL_FL_ISSET((p)->flags, f)
  85
  86 /* isl_check_ctx() checks at compile time if 'ctx' is of type 'isl_ctx *' and
  87  * returns the value of 'expr'. It is used to ensure, that always an isl_ctx is
  88  * passed to the following macros, even if they currently do not use it.
  89  */
  90 #define isl_check_ctx(ctx, expr)        (ctx != (isl_ctx *) 0) ? expr : expr
  91
  92 #define isl_alloc(ctx,type,size)        isl_check_ctx(ctx, (type *)malloc(size))
  93 #define isl_calloc(ctx,type,size)       isl_check_ctx(ctx, \
  94                                                 (type *)calloc(1, size))
  95 #define isl_realloc(ctx,ptr,type,size)  isl_check_ctx(ctx, \
  96                                                 (type *)realloc(ptr,size))
  97 #define isl_alloc_type(ctx,type)        isl_alloc(ctx,type,sizeof(type))
  98 #define isl_calloc_type(ctx,type)       isl_calloc(ctx,type,sizeof(type))
  99 #define isl_realloc_type(ctx,ptr,type)  isl_realloc(ctx,ptr,type,sizeof(type))
 100 #define isl_alloc_array(ctx,type,n)     isl_alloc(ctx,type,(n)*sizeof(type))
 101 #define isl_calloc_array(ctx,type,n)    isl_check_ctx(ctx,\
 102                                                 (type *)calloc(n, sizeof(type)))
 103 #define isl_realloc_array(ctx,ptr,type,n) \
 104                                     isl_realloc(ctx,ptr,type,(n)*sizeof(type))
 105
 106 #define isl_die(ctx,errno,msg,code)                                     \
 107         do {                                                            \
 108                 isl_ctx_set_error(ctx, errno);                          \
 109                 fprintf(stderr, "%s:%d: %s\n", __FILE__, __LINE__, msg);        \
 110                 code;                                                   \
 111         } while (0)
 112 #define isl_assert4(ctx,test,code,errno)                                \
 113         do {                                                            \
 114                 if (test)                                               \
 115                         break;                                          \
 116                 isl_die(ctx, errno, "Assertion \"" #test "\" failed", code);    \
 117         } while (0)
 118 #define isl_assert(ctx,test,code)                                       \
 119         isl_assert4(ctx,test,code,isl_error_unknown)
 120
 121 #define isl_min(a,b)                    ((a < b) ? (a) : (b))
 122
 123 /* struct isl_ctx functions */
 124
 125 struct isl_options *isl_ctx_options(isl_ctx *ctx);
 126
 127 isl_ctx *isl_ctx_alloc_with_options(struct isl_arg *arg, __isl_take void *opt);
 128 isl_ctx *isl_ctx_alloc();
 129 void *isl_ctx_peek_options(isl_ctx *ctx, struct isl_arg *arg);
 130 void isl_ctx_ref(struct isl_ctx *ctx);
 131 void isl_ctx_deref(struct isl_ctx *ctx);
 132 void isl_ctx_free(isl_ctx *ctx);
 133
 134 void isl_ctx_abort(isl_ctx *ctx);
 135 void isl_ctx_resume(isl_ctx *ctx);
 136 int isl_ctx_aborted(isl_ctx *ctx);
 137
 138 #define ISL_ARG_CTX_DECL(prefix,st,arg)                                 \
 139 st *isl_ctx_peek_ ## prefix(isl_ctx *ctx);
 140
 141 #define ISL_ARG_CTX_DEF(prefix,st,arg)                                  \
 142 st *isl_ctx_peek_ ## prefix(isl_ctx *ctx)                               \
 143 {                                                                       \
 144         return (st *)isl_ctx_peek_options(ctx, arg);                    \
 145 }
 146
 147 enum isl_error isl_ctx_last_error(isl_ctx *ctx);
 148 void isl_ctx_reset_error(isl_ctx *ctx);
 149 void isl_ctx_set_error(isl_ctx *ctx, enum isl_error error);
 150
 151 #if defined(__cplusplus)
 152 }
 153 #endif
 154
 155 #endif