зеркало из https://github.com/github/ruby.git
68 строки
2.3 KiB
C
68 строки
2.3 KiB
C
#ifndef RUBY_ATOMIC_H
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#define RUBY_ATOMIC_H
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#ifdef _WIN32
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#if defined _MSC_VER && _MSC_VER > 1200
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#pragma intrinsic(_InterlockedOr)
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#endif
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typedef LONG rb_atomic_t;
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# define ATOMIC_SET(var, val) InterlockedExchange(&(var), (val))
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# define ATOMIC_INC(var) InterlockedIncrement(&(var))
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# define ATOMIC_DEC(var) InterlockedDecrement(&(var))
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#if defined __GNUC__
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# define ATOMIC_OR(var, val) __asm__("lock\n\t" "orl\t%1, %0" : "=m"(var) : "Ir"(val))
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#elif defined _MSC_VER && _MSC_VER <= 1200
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# define ATOMIC_OR(var, val) rb_w32_atomic_or(&(var), (val))
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static inline void
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rb_w32_atomic_or(volatile rb_atomic_t *var, rb_atomic_t val)
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{
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#ifdef _M_IX86
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__asm mov eax, var;
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__asm mov ecx, val;
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__asm lock or [eax], ecx;
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#else
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#error unsupported architecture
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#endif
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}
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#else
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# define ATOMIC_OR(var, val) _InterlockedOr(&(var), (val))
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#endif
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# define ATOMIC_EXCHANGE(var, val) InterlockedExchange(&(var), (val))
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#elif defined HAVE_GCC_ATOMIC_BUILTINS
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/* @shyouhei hack to support atomic operations in case of gcc. Gcc
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* has its own pseudo-insns to support them. See info, or
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* http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html */
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typedef unsigned int rb_atomic_t; /* Anything OK */
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# define ATOMIC_SET(var, val) (void)__sync_lock_test_and_set(&(var), (val))
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# define ATOMIC_INC(var) __sync_fetch_and_add(&(var), 1)
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# define ATOMIC_DEC(var) __sync_fetch_and_sub(&(var), 1)
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# define ATOMIC_OR(var, val) __sync_or_and_fetch(&(var), (val))
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# define ATOMIC_EXCHANGE(var, val) __sync_lock_test_and_set(&(var), (val))
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#elif defined(__sun)
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#include <atomic.h>
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typedef unsigned int rb_atomic_t;
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# define ATOMIC_SET(var, val) (void)atomic_swap_uint(&(var), (val))
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# define ATOMIC_INC(var) atomic_inc_uint(&(var))
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# define ATOMIC_DEC(var) atomic_dec_uint(&(var))
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# define ATOMIC_OR(var, val) atomic_or_uint(&(var), (val))
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# define ATOMIC_EXCHANGE(var, val) atomic_swap_uint(&(var), (val))
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#else
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typedef int rb_atomic_t;
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#define NEED_RUBY_ATOMIC_EXCHANGE
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extern rb_atomic_t ruby_atomic_exchange(rb_atomic_t *ptr, rb_atomic_t val);
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# define ATOMIC_SET(var, val) (void)((var) = (val))
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# define ATOMIC_INC(var) ((var)++)
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# define ATOMIC_DEC(var) ((var)--)
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# define ATOMIC_OR(var, val) ((var) |= (val))
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# define ATOMIC_EXCHANGE(var, val) ruby_atomic_exchange(&(var), (val))
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#endif
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#endif /* RUBY_ATOMIC_H */
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