Changeset 6f025a8 in mainline for uspace/lib/cpp/src/__bits/glue.cpp
- Timestamp:
- 2018-07-05T21:41:25Z (6 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- eb2c8b6
- Parents:
- 1583793
- git-author:
- Dzejrou <dzejrou@…> (2018-06-27 15:50:19)
- git-committer:
- Dzejrou <dzejrou@…> (2018-07-05 21:41:25)
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
uspace/lib/cpp/src/__bits/glue.cpp
r1583793 r6f025a8 1 /* 2 * Copyright (c) 2018 Jaroslav Jindrak 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * - Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * - The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /** 30 * This file contains glue code that makes different 31 * architectures pass. 32 */ 33 34 #ifdef PLATFORM_arm 35 36 /** 37 * ARM32 does not have GCC atomic operations inlined by 38 * the compiler, so we need to define stubs for our library 39 * to compile on this architecture. 40 */ 41 extern "C" 42 { 43 #define LIBCPP_GLUE_OP_AND_FETCH(NAME, OP, TYPE, SIZE) \ 44 TYPE __sync_##NAME##_and_fetch_##SIZE (volatile void* vptr, TYPE val) \ 45 { \ 46 TYPE* ptr = (TYPE*)vptr; \ 47 *ptr = *ptr OP val; \ 48 return *ptr; \ 49 } 50 51 LIBCPP_GLUE_OP_AND_FETCH(add, +, unsigned, 4) 52 LIBCPP_GLUE_OP_AND_FETCH(sub, -, unsigned, 4) 53 54 #define LIBCPP_GLUE_CMP_AND_SWAP(TYPE, SIZE) \ 55 TYPE __sync_compare_and_swap_##SIZE (TYPE* ptr, TYPE old_val, TYPE new_val) \ 56 { \ 57 if (*ptr == old_val) \ 58 *ptr = new_val; \ 59 return *ptr; \ 60 } 61 62 LIBCPP_GLUE_CMP_AND_SWAP(unsigned, 4) 63 } 64 #endif
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