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Diffstat (limited to 'src/threading/atomic.h')
| -rw-r--r-- | src/threading/atomic.h | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/src/threading/atomic.h b/src/threading/atomic.h deleted file mode 100644 index c9a454f20..000000000 --- a/src/threading/atomic.h +++ /dev/null @@ -1,139 +0,0 @@ -/* -Minetest -Copyright (C) 2015 ShadowNinja <shadowninja@minetest.net> - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU Lesser General Public License as published by -the Free Software Foundation; either version 2.1 of the License, or -(at your option) any later version. - -This program 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 Lesser General Public License for more details. - -You should have received a copy of the GNU Lesser General Public License along -with this program; if not, write to the Free Software Foundation, Inc., -51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. -*/ - -#ifndef THREADING_ATOMIC_H -#define THREADING_ATOMIC_H - - -#if __cplusplus >= 201103L - #include <atomic> - template<typename T> using Atomic = std::atomic<T>; - template<typename T> using GenericAtomic = std::atomic<T>; -#else - -#define GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__) -#define CLANG_VERSION (__clang_major__ * 100 + __clang_minor__) -#if GCC_VERSION >= 407 || CLANG_VERSION >= 302 - #define ATOMIC_LOAD_GENERIC(T, v) do { \ - T _val; \ - __atomic_load(&(v), &(_val), __ATOMIC_SEQ_CST); \ - return _val; \ - } while(0) - #define ATOMIC_LOAD(T, v) return __atomic_load_n (&(v), __ATOMIC_SEQ_CST) - #define ATOMIC_STORE(T, v, x) __atomic_store (&(v), &(x), __ATOMIC_SEQ_CST); return x - #define ATOMIC_EXCHANGE(T, v, x) return __atomic_exchange (&(v), &(x), __ATOMIC_SEQ_CST) - #define ATOMIC_ADD_EQ(T, v, x) return __atomic_add_fetch (&(v), (x), __ATOMIC_SEQ_CST) - #define ATOMIC_SUB_EQ(T, v, x) return __atomic_sub_fetch (&(v), (x), __ATOMIC_SEQ_CST) - #define ATOMIC_POST_INC(T, v) return __atomic_fetch_add (&(v), 1, __ATOMIC_SEQ_CST) - #define ATOMIC_POST_DEC(T, v) return __atomic_fetch_sub (&(v), 1, __ATOMIC_SEQ_CST) - #define ATOMIC_CAS(T, v, e, d) return __atomic_compare_exchange(&(v), &(e), &(d), \ - false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST) -#else - #define ATOMIC_USE_LOCK - #include "threading/mutex.h" - - #define ATOMIC_LOCK_OP(T, op) do { \ - m_mutex.lock(); \ - T _val = (op); \ - m_mutex.unlock(); \ - return _val; \ - } while (0) - #define ATOMIC_LOCK_CAS(T, v, e, d) do { \ - m_mutex.lock(); \ - bool _eq = (v == e); \ - if (_eq) \ - v = d; \ - m_mutex.unlock(); \ - return _eq; \ - } while (0) - #define ATOMIC_LOAD(T, v) ATOMIC_LOCK_OP(T, v) - #define ATOMIC_LOAD_GENERIC(T, v) ATOMIC_LOAD(T, v) - #define ATOMIC_STORE(T, v, x) ATOMIC_LOCK_OP(T, v = x) - #define ATOMIC_EXCHANGE(T, v, x) do { \ - m_mutex.lock(); \ - T _val = v; \ - v = x; \ - m_mutex.unlock(); \ - return _val; \ - } while (0) - #if GCC_VERSION >= 401 - #define ATOMIC_ADD_EQ(T, v, x) return __sync_add_and_fetch(&(v), (x)) - #define ATOMIC_SUB_EQ(T, v, x) return __sync_sub_and_fetch(&(v), (x)) - #define ATOMIC_POST_INC(T, v) return __sync_fetch_and_add(&(v), 1) - #define ATOMIC_POST_DEC(T, v) return __sync_fetch_and_sub(&(v), 1) - #define ATOMIC_CAS(T, v, e, d) return __sync_bool_compare_and_swap(&(v), &(e), (d)) - #else - #define ATOMIC_ADD_EQ(T, v, x) ATOMIC_LOCK_OP(T, v += x) - #define ATOMIC_SUB_EQ(T, v, x) ATOMIC_LOCK_OP(T, v -= x) - #define ATOMIC_POST_INC(T, v) ATOMIC_LOCK_OP(T, v++) - #define ATOMIC_POST_DEC(T, v) ATOMIC_LOCK_OP(T, v--) - #define ATOMIC_CAS(T, v, e, d) ATOMIC_LOCK_CAS(T, v, e, d) - #endif -#endif - -// For usage with integral types. -template<typename T> -class Atomic { -public: - Atomic(const T &v = 0) : m_val(v) {} - - operator T () { ATOMIC_LOAD(T, m_val); } - - T exchange(T x) { ATOMIC_EXCHANGE(T, m_val, x); } - bool compare_exchange_strong(T &expected, T desired) { ATOMIC_CAS(T, m_val, expected, desired); } - - T operator = (T x) { ATOMIC_STORE(T, m_val, x); } - T operator += (T x) { ATOMIC_ADD_EQ(T, m_val, x); } - T operator -= (T x) { ATOMIC_SUB_EQ(T, m_val, x); } - T operator ++ () { return *this += 1; } - T operator -- () { return *this -= 1; } - T operator ++ (int) { ATOMIC_POST_INC(T, m_val); } - T operator -- (int) { ATOMIC_POST_DEC(T, m_val); } -private: - T m_val; -#ifdef ATOMIC_USE_LOCK - Mutex m_mutex; -#endif -}; - -// For usage with non-integral types like float for example. -// Needed because the other operations aren't provided by gcc -// for non-integral types: -// https://gcc.gnu.org/onlinedocs/gcc-4.7.0/gcc/_005f_005fatomic-Builtins.html -template<typename T> -class GenericAtomic { -public: - GenericAtomic(const T &v = 0) : m_val(v) {} - - operator T () { ATOMIC_LOAD_GENERIC(T, m_val); } - - T exchange(T x) { ATOMIC_EXCHANGE(T, m_val, x); } - bool compare_exchange_strong(T &expected, T desired) { ATOMIC_CAS(T, m_val, expected, desired); } - - T operator = (T x) { ATOMIC_STORE(T, m_val, x); } -private: - T m_val; -#ifdef ATOMIC_USE_LOCK - Mutex m_mutex; -#endif -}; - -#endif // C++11 - -#endif |