| /* Copyright (C) 2020 Free Software Foundation, Inc. |
| Contributed by Nicolas Koenig |
| |
| This file is part of the GNU Fortran Native Coarray Library (libnca). |
| |
| Libnca is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| Libnca is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef SHARED_MEMORY_H |
| #define SHARED_MEMORY_H |
| |
| /* A struct to serve as an opaque shared memory object. */ |
| |
| struct shared_memory_act; |
| typedef struct shared_memory_act * shared_memory; |
| |
| #define SHMPTR_NULL ((shared_mem_ptr) {.p = NULL}) |
| #define SHMPTR_IS_NULL(x) (x.p == NULL) |
| |
| #define SHMPTR_DEREF(x, s, sm) \ |
| ((x) = *(__typeof(x) *) s.p) |
| #define SHMPTR_AS(t, s, sm) ((t) s.p) |
| #define SHMPTR_SET(v, s, sm) (v = SHMPTR_AS(__typeof(v), s, sm)) |
| #define SHMPTR_EQUALS(s1, s2) (s1.p == s2.p) |
| |
| #define SHARED_MEMORY_RAW_ALLOC(mem, t, n) \ |
| shared_memory_get_mem_with_alignment(mem, sizeof(t)*n, __alignof__(t)) |
| |
| #define SHARED_MEMORY_RAW_ALLOC_PTR(mem, t) \ |
| SHMPTR_AS (t *, SHARED_MEMORY_RAW_ALLOC (mem, t, 1), mem) |
| |
| /* A shared-memory pointer is implemented as an offset into the shared |
| memory region. */ |
| |
| typedef struct shared_mem_ptr |
| { |
| void *p; |
| } shared_mem_ptr; |
| |
| void shared_memory_init (shared_memory *, size_t); |
| internal_proto (shared_memory_init); |
| |
| void shared_memory_prepare (shared_memory *); |
| internal_proto (shared_memory_prepare); |
| |
| shared_mem_ptr shared_memory_get_mem_with_alignment (shared_memory *mem, |
| size_t size, size_t align); |
| internal_proto (shared_memory_get_mem_with_alignment); |
| |
| #endif |