1 #ifndef ATOMIC_NOLOCK_INCLUDED 2 #define ATOMIC_NOLOCK_INCLUDED 3 4 /* Copyright (c) 2006, 2016, Oracle and/or its affiliates. All rights reserved. reserved. 5 reserved. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License, version 2.0, 9 as published by the Free Software Foundation. 10 11 This program is also distributed with certain software (including 12 but not limited to OpenSSL) that is licensed under separate terms, 13 as designated in a particular file or component or in included license 14 documentation. The authors of MySQL hereby grant you an additional 15 permission to link the program and your derivative works with the 16 separately licensed software that they have included with MySQL. 17 18 This program is distributed in the hope that it will be useful, 19 but WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 GNU General Public License, version 2.0, for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ 26 27 /* 28 We choose implementation as follows: 29 ------------------------------------ 30 On Windows using Visual C++ the native implementation should be 31 preferrable. When using gcc we prefer the Solaris implementation 32 before the gcc because of stability preference, we choose gcc 33 builtins if available, otherwise we fallback to rw locks. If 34 neither Visual C++ or gcc we still choose the Solaris 35 implementation on Solaris (mainly for SunStudio compilers). 36 */ 37 # if defined(_MSC_VER) 38 # include "generic-msvc.h" 39 # elif __GNUC__ 40 # if defined(HAVE_SOLARIS_ATOMIC) 41 # include "solaris.h" 42 # elif defined(HAVE_GCC_ATOMIC_BUILTINS) 43 # include "gcc_builtins.h" 44 # endif 45 # elif defined(HAVE_SOLARIS_ATOMIC) 46 # include "solaris.h" 47 # endif 48 49 #if defined(make_atomic_cas_body) 50 /* 51 Type not used so minimal size (emptry struct has different size between C 52 and C++, zero-length array is gcc-specific). 53 */ 54 typedef char my_atomic_rwlock_t MY_ATTRIBUTE ((unused)); 55 #define my_atomic_rwlock_destroy(name) 56 #define my_atomic_rwlock_init(name) 57 #define my_atomic_rwlock_rdlock(name) 58 #define my_atomic_rwlock_wrlock(name) 59 #define my_atomic_rwlock_rdunlock(name) 60 #define my_atomic_rwlock_wrunlock(name) 61 62 #endif 63 64 #endif /* ATOMIC_NOLOCK_INCLUDED */ 65