~mdw / misc / blame
| Commit | Line | Data |
|---|---|---|
| 300a556d MW |
1 | /* -*-c-*- |
| 2 | * | |
| 3 | * Bodge to control memory access ordering | |
| 4 | * | |
| 5 | * (c) 2016 Mark Wooding | |
| 6 | */ | |
| 7 | ||
| 8 | /*----- Licensing notice --------------------------------------------------* | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or modify | |
| 11 | * it under the terms of the GNU General Public License as published by | |
| 12 | * the Free Software Foundation; either version 2 of the License, or | |
| 13 | * (at your option) any later version. | |
| 14 | * | |
| 15 | * This program is distributed in the hope that it will be useful, | |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | * GNU General Public License for more details. | |
| 19 | * | |
| 20 | * You should have received a copy of the GNU General Public License | |
| 21 | * along with this program; if not, write to the Free Software Foundation, | |
| 22 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 23 | */ | |
| 24 | ||
| 25 | #ifndef FENCE_H | |
| 26 | #define FENCE_H | |
| 27 | ||
| 28 | #ifdef __cplusplus | |
| 29 | extern "C" { | |
| 30 | #endif | |
| 31 | ||
| 32 | /*----- Header files ------------------------------------------------------*/ | |
| 33 | ||
| 34 | #include <mLib/macros.h> | |
| 35 | ||
| 36 | /*----- Functions provided ------------------------------------------------*/ | |
| 37 | ||
| 38 | /* --- @compiler_fence@ --- * | |
| 39 | * | |
| 40 | * Arguments: some pointers to things | |
| 41 | * | |
| 42 | * Returns: Nothing. | |
| 43 | * | |
| 44 | * Use: Actually doesn't do anything at all, but in a separate | |
| 45 | * translation unit so that the compiler can't tell that. So it | |
| 46 | * won't be able to move memory accesses to the addressed | |
| 47 | * objects across the call. | |
| 48 | */ | |
| 49 | ||
| 50 | #define FENCE_END ((void *)0) | |
| 51 | EXECL_LIKE(0) void compiler_fence(void */*p*/, ...); | |
| 52 | ||
| 53 | /*----- That's all, folks -------------------------------------------------*/ | |
| 54 | ||
| 55 | #ifdef __cplusplus | |
| 56 | } | |
| 57 | #endif | |
| 58 | ||
| 59 | #endif |