libgfortran/caf/libcaf.h

   1 /* Common declarations for all of GNU Fortran libcaf implementations.
   2    Copyright (C) 2011-2017 Free Software Foundation, Inc.
   3    Contributed by Tobias Burnus <burnus@net-b.de>
   4
   5 This file is part of the GNU Fortran Coarray Runtime Library (libcaf).
   6
   7 Libcaf is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 Libcaf is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef LIBCAF_H
  27 #define LIBCAF_H
  28
  29 #include <stdbool.h>
  30 #include <stddef.h>     /* For size_t.  */
  31 #include <stdint.h>     /* For int32_t.  */
  32
  33 #include "libgfortran.h"
  34
  35 #if 0
  36 #ifndef __GNUC__
  37 #define __attribute__(x)
  38 #define likely(x)       (x)
  39 #define unlikely(x)     (x)
  40 #else
  41 #define likely(x)       __builtin_expect(!!(x), 1)
  42 #define unlikely(x)     __builtin_expect(!!(x), 0)
  43 #endif
  44 #endif
  45
  46 /* Definitions of the Fortran 2008 standard; need to kept in sync with
  47    ISO_FORTRAN_ENV, cf. gcc/fortran/libgfortran.h.  */
  48 typedef enum
  49 {
  50   CAF_STAT_UNLOCKED = 0,
  51   CAF_STAT_LOCKED,
  52   CAF_STAT_LOCKED_OTHER_IMAGE,
  53   CAF_STAT_STOPPED_IMAGE = 6000,
  54   CAF_STAT_FAILED_IMAGE  = 6001
  55 }
  56 caf_stat_codes_t;
  57
  58
  59 /* Describes what type of array we are registerring.  Keep in sync with
  60    gcc/fortran/trans.h.  */
  61 typedef enum caf_register_t {
  62   CAF_REGTYPE_COARRAY_STATIC,
  63   CAF_REGTYPE_COARRAY_ALLOC,
  64   CAF_REGTYPE_LOCK_STATIC,
  65   CAF_REGTYPE_LOCK_ALLOC,
  66   CAF_REGTYPE_CRITICAL,
  67   CAF_REGTYPE_EVENT_STATIC,
  68   CAF_REGTYPE_EVENT_ALLOC,
  69   CAF_REGTYPE_COARRAY_ALLOC_REGISTER_ONLY,
  70   CAF_REGTYPE_COARRAY_ALLOC_ALLOCATE_ONLY
  71 }
  72 caf_register_t;
  73
  74 /* Describes the action to take on _caf_deregister.  Keep in sync with
  75    gcc/fortran/trans.h.  */
  76 typedef enum caf_deregister_t {
  77   CAF_DEREGTYPE_COARRAY_DEREGISTER,
  78   CAF_DEREGTYPE_COARRAY_DEALLOCATE_ONLY
  79 }
  80 caf_deregister_t;
  81
  82 typedef void* caf_token_t;
  83 typedef void * caf_team_t;
  84 typedef gfc_array_void gfc_descriptor_t;
  85
  86 /* Linked list of static coarrays registered.  */
  87 typedef struct caf_static_t {
  88   caf_token_t token;
  89   struct caf_static_t *prev;
  90 }
  91 caf_static_t;
  92
  93 /* When there is a vector subscript in this dimension, nvec == 0, otherwise,
  94    lower_bound, upper_bound, stride contains the bounds relative to the declared
  95    bounds; kind denotes the integer kind of the elements of vector[].  */
  96 typedef struct caf_vector_t {
  97   size_t nvec;
  98   union {
  99     struct {
 100       void *vector;
 101       int kind;
 102     } v;
 103     struct {
 104       ptrdiff_t lower_bound, upper_bound, stride;
 105     } triplet;
 106   } u;
 107 }
 108 caf_vector_t;
 109
 110 typedef enum caf_ref_type_t {
 111   /* Reference a component of a derived type, either regular one or an
 112      allocatable or pointer type.  For regular ones idx in caf_reference_t is
 113      set to -1.  */
 114   CAF_REF_COMPONENT,
 115   /* Reference an allocatable array.  */
 116   CAF_REF_ARRAY,
 117   /* Reference a non-allocatable/non-pointer array.  */
 118   CAF_REF_STATIC_ARRAY
 119 } caf_ref_type_t;
 120
 121 typedef enum caf_array_ref_t {
 122   /* No array ref.  This terminates the array ref.  */
 123   CAF_ARR_REF_NONE = 0,
 124   /* Reference array elements given by a vector.  Only for this mode
 125      caf_reference_t.u.a.dim[i].v is valid.  */
 126   CAF_ARR_REF_VECTOR,
 127   /* A full array ref (:).  */
 128   CAF_ARR_REF_FULL,
 129   /* Reference a range on elements given by start, end and stride.  */
 130   CAF_ARR_REF_RANGE,
 131   /* Only a single item is referenced given in the start member.  */
 132   CAF_ARR_REF_SINGLE,
 133   /* An array ref of the kind (i:), where i is an arbitrary valid index in the
 134      array.  The index i is given in the start member.  */
 135   CAF_ARR_REF_OPEN_END,
 136   /* An array ref of the kind (:i), where the lower bound of the array ref
 137      is given by the remote side.  The index i is given in the end member.  */
 138   CAF_ARR_REF_OPEN_START
 139 } caf_array_ref_t;
 140
 141 /* References to remote components of a derived type.  */
 142 typedef struct caf_reference_t {
 143   /* A pointer to the next ref or NULL.  */
 144   struct caf_reference_t *next;
 145   /* The type of the reference.  */
 146   /* caf_ref_type_t, replaced by int to allow specification in fortran FE.  */
 147   int type;
 148   /* The size of an item referenced in bytes.  I.e. in an array ref this is
 149      the factor to advance the array pointer with to get to the next item.
 150      For component refs this gives just the size of the element referenced.  */
 151   size_t item_size;
 152   union {
 153     struct {
 154       /* The offset (in bytes) of the component in the derived type.  */
 155       ptrdiff_t offset;
 156       /* The offset (in bytes) to the caf_token associated with this
 157          component.  NULL, when not allocatable/pointer ref.  */
 158       ptrdiff_t caf_token_offset;
 159     } c;
 160     struct {
 161       /* The mode of the array ref.  See CAF_ARR_REF_*.  */
 162       /* caf_array_ref_t, replaced by unsigend char to allow specification in
 163          fortran FE.  */
 164       unsigned char mode[GFC_MAX_DIMENSIONS];
 165       /* The type of a static array.  Unset for array's with descriptors.  */
 166       int static_array_type;
 167       /* Subscript refs (s) or vector refs (v).  */
 168       union {
 169         struct {
 170           /* The start and end boundary of the ref and the stride.  */
 171           index_type start, end, stride;
 172         } s;
 173         struct {
 174           /* nvec entries of kind giving the elements to reference.  */
 175           void *vector;
 176           /* The number of entries in vector.  */
 177           size_t nvec;
 178           /* The integer kind used for the elements in vector.  */
 179           int kind;
 180         } v;
 181       } dim[GFC_MAX_DIMENSIONS];
 182     } a;
 183   } u;
 184 } caf_reference_t;
 185
 186 void _gfortran_caf_init (int *, char ***);
 187 void _gfortran_caf_finalize (void);
 188
 189 int _gfortran_caf_this_image (int);
 190 int _gfortran_caf_num_images (int, int);
 191
 192 void _gfortran_caf_register (size_t, caf_register_t, caf_token_t *,
 193                              gfc_descriptor_t *, int *, char *, int);
 194 void _gfortran_caf_deregister (caf_token_t *, caf_deregister_t, int *, char *,
 195                                int);
 196
 197 void _gfortran_caf_sync_all (int *, char *, int);
 198 void _gfortran_caf_sync_memory (int *, char *, int);
 199 void _gfortran_caf_sync_images (int, int[], int *, char *, int);
 200
 201 void _gfortran_caf_stop_numeric (int32_t)
 202      __attribute__ ((noreturn));
 203 void _gfortran_caf_stop_str (const char *, int32_t)
 204      __attribute__ ((noreturn));
 205 void _gfortran_caf_error_stop_str (const char *, int32_t)
 206      __attribute__ ((noreturn));
 207 void _gfortran_caf_error_stop (int32_t) __attribute__ ((noreturn));
 208 void _gfortran_caf_fail_image (void) __attribute__ ((noreturn));
 209
 210 void _gfortran_caf_co_broadcast (gfc_descriptor_t *, int, int *, char *, int);
 211 void _gfortran_caf_co_sum (gfc_descriptor_t *, int, int *, char *, int);
 212 void _gfortran_caf_co_min (gfc_descriptor_t *, int, int *, char *, int, int);
 213 void _gfortran_caf_co_max (gfc_descriptor_t *, int, int *, char *, int, int);
 214 void _gfortran_caf_co_reduce (gfc_descriptor_t *, void* (*) (void *, void*),
 215                               int, int, int *, char *, int, int);
 216
 217 void _gfortran_caf_get (caf_token_t, size_t, int, gfc_descriptor_t *,
 218                         caf_vector_t *, gfc_descriptor_t *, int, int, bool,
 219                         int *);
 220 void _gfortran_caf_send (caf_token_t, size_t, int, gfc_descriptor_t *,
 221                          caf_vector_t *, gfc_descriptor_t *, int, int, bool,
 222                          int *);
 223 void _gfortran_caf_sendget (caf_token_t, size_t, int, gfc_descriptor_t *,
 224                             caf_vector_t *, caf_token_t, size_t, int,
 225                             gfc_descriptor_t *, caf_vector_t *, int, int, bool);
 226
 227 void _gfortran_caf_get_by_ref (caf_token_t token, int image_idx,
 228         gfc_descriptor_t *dst, caf_reference_t *refs, int dst_kind,
 229         int src_kind, bool may_require_tmp, bool dst_reallocatable, int *stat);
 230 void _gfortran_caf_send_by_ref (caf_token_t token, int image_index,
 231         gfc_descriptor_t *src, caf_reference_t *refs, int dst_kind,
 232         int src_kind, bool may_require_tmp, bool dst_reallocatable, int *stat);
 233 void _gfortran_caf_sendget_by_ref (
 234         caf_token_t dst_token, int dst_image_index, caf_reference_t *dst_refs,
 235         caf_token_t src_token, int src_image_index, caf_reference_t *src_refs,
 236         int dst_kind, int src_kind, bool may_require_tmp, int *dst_stat,
 237         int *src_stat);
 238
 239 void _gfortran_caf_atomic_define (caf_token_t, size_t, int, void *, int *,
 240                                   int, int);
 241 void _gfortran_caf_atomic_ref (caf_token_t, size_t, int, void *, int *,
 242                                int, int);
 243 void _gfortran_caf_atomic_cas (caf_token_t, size_t, int, void *, void *,
 244                                void *, int *, int, int);
 245 void _gfortran_caf_atomic_op (int, caf_token_t, size_t, int, void *, void *,
 246                               int *, int, int);
 247
 248 void _gfortran_caf_lock (caf_token_t, size_t, int, int *, int *, char *, int);
 249 void _gfortran_caf_unlock (caf_token_t, size_t, int, int *, char *, int);
 250 void _gfortran_caf_event_post (caf_token_t, size_t, int, int *, char *, int);
 251 void _gfortran_caf_event_wait (caf_token_t, size_t, int, int *, char *, int);
 252 void _gfortran_caf_event_query (caf_token_t, size_t, int, int *, int *);
 253
 254 void _gfortran_caf_failed_images (gfc_descriptor_t *,
 255                                   caf_team_t * __attribute__ ((unused)), int *);
 256 int _gfortran_caf_image_status (int, caf_team_t * __attribute__ ((unused)));
 257 void _gfortran_caf_stopped_images (gfc_descriptor_t *,
 258                                    caf_team_t * __attribute__ ((unused)),
 259                                    int *);
 260
 261 int _gfortran_caf_is_present (caf_token_t, int, caf_reference_t *);
 262
 263 #endif  /* LIBCAF_H  */