24 lines
1 KiB
C
24 lines
1 KiB
C
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#ifndef _ATOMIC_H_DEF_
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#define _ATOMIC_H_DEF_
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#define WR_MEMORDER __ATOMIC_SEQ_CST
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#define RD_MEMORDER __ATOMIC_SEQ_CST
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/* Velmi zjednodušené, ale v zásadě funkční.
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* Asi to bude nutné trochu rozšířit, ale zatím to nebudu komplikovat.
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* Použity jsou interní funkce gcc (clang), takže to není závislé na
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* architektuře.
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* */
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template<class T> class atomic {
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volatile T data;
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public:
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explicit atomic () noexcept : data( ) {}
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explicit atomic (const T & v) noexcept : data(v) {}
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atomic & operator= (volatile T & v) { __atomic_store_n (& data, v, WR_MEMORDER); return * this; }
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atomic & operator= (const T & v) { __atomic_store_n (& data, v, WR_MEMORDER); return * this; }
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operator T () const { return __atomic_load_n (& data, RD_MEMORDER); }
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atomic & operator+= (const T & v) { __atomic_add_fetch (& data, v, WR_MEMORDER); return * this; }
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atomic & operator-= (const T & v) { __atomic_sub_fetch (& data, v, WR_MEMORDER); return * this; }
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};
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#endif // _ATOMIC_H_DEF_
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