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5faf4cc77b
* ruby_atomic.h, signal.c (NEED_RUBY_ATOMIC_OPS): renamed from NEED_RUBY_ATOMIC_EXCHANGE. * signal.c (ruby_atomic_compare_and_swap): naive, non-atomic compare-and-swap implementation only used for platforms without valid support for atomic operations. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37897 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
121 lines
4.9 KiB
C
121 lines
4.9 KiB
C
#ifndef RUBY_ATOMIC_H
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#define RUBY_ATOMIC_H
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#if 0
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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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# define ATOMIC_CAS(var, oldval, newval) __sync_val_compare_and_swap(&(var), (oldval), (newval))
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# define ATOMIC_SIZE_ADD(var, val) __sync_fetch_and_add(&(var), (val))
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# define ATOMIC_SIZE_SUB(var, val) __sync_fetch_and_sub(&(var), (val))
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# define ATOMIC_SIZE_INC(var) __sync_fetch_and_add(&(var), 1)
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# define ATOMIC_SIZE_DEC(var) __sync_fetch_and_sub(&(var), 1)
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# define ATOMIC_SIZE_EXCHANGE(var, val) __sync_lock_test_and_set(&(var), (val))
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#elif defined _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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# define ATOMIC_CAS(var, oldval, newval) InterlockedCompareExchange(&(var), (newval), (oldval))
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# ifdef _M_AMD64
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# define ATOMIC_SIZE_ADD(var, val) InterlockedExchangeAdd64(&(var), (val))
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# define ATOMIC_SIZE_SUB(var, val) InterlockedExchangeAdd64(&(var), -(val))
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# define ATOMIC_SIZE_INC(var) InterlockedIncrement64(&(var))
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# define ATOMIC_SIZE_DEC(var) InterlockedDecrement64(&(var))
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# define ATOMIC_SIZE_EXCHANGE(var, val) InterlockedExchange64(&(var), (val))
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# else
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# define ATOMIC_SIZE_ADD(var, val) InterlockedExchangeAdd((LONG *)&(var), (val))
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# define ATOMIC_SIZE_SUB(var, val) InterlockedExchangeAdd((LONG *)&(var), -(val))
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# define ATOMIC_SIZE_INC(var) InterlockedIncrement((LONG *)&(var))
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# define ATOMIC_SIZE_DEC(var) InterlockedDecrement((LONG *)&(var))
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# define ATOMIC_SIZE_EXCHANGE(var, val) InterlockedExchange((LONG *)&(var), (val))
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# endif
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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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# define ATOMIC_CAS(var, oldval, newval) atomic_cas_uint(&(var), (oldval), (newval))
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# if SIZEOF_SIZE_T == SIZEOF_LONG
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# define ATOMIC_SIZE_ADD(var, val) atomic_add_long(&(var), (val))
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# define ATOMIC_SIZE_SUB(var, val) atomic_add_long(&(var), -(val))
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# define ATOMIC_SIZE_INC(var) atomic_inc_ulong(&(var))
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# define ATOMIC_SIZE_DEC(var) atomic_dec_ulong(&(var))
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# define ATOMIC_SIZE_EXCHANGE(var, val) atomic_swap_ulong(&(var), (val))
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# else
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# define ATOMIC_SIZE_ADD(var, val) atomic_add_int(&(var), (val))
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# define ATOMIC_SIZE_SUB(var, val) atomic_add_int(&(var), -(val))
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# define ATOMIC_SIZE_INC(var) atomic_inc_uint(&(var))
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# define ATOMIC_SIZE_DEC(var) atomic_dec_uint(&(var))
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# define ATOMIC_SIZE_EXCHANGE(var, val) atomic_swap_uint(&(var), (val))
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# endif
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#else
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typedef int rb_atomic_t;
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#define NEED_RUBY_ATOMIC_OPS
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extern rb_atomic_t ruby_atomic_exchange(rb_atomic_t *ptr, rb_atomic_t val);
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extern rb_atomic_t ruby_atomic_compare_and_swap(rb_atomic_t *ptr,
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rb_atomic_t cmp,
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rb_atomic_t newval);
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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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# define ATOMIC_CAS(var, oldval, newval) ruby_atomic_compare_and_swap(&(var), (oldval), (newval))
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# define ATOMIC_SIZE_ADD(var, val) (void)((var) += (val))
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# define ATOMIC_SIZE_SUB(var, val) (void)((var) -= (val))
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# define ATOMIC_SIZE_INC(var) ((var)++)
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# define ATOMIC_SIZE_DEC(var) ((var)--)
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# define ATOMIC_SIZE_EXCHANGE(var, val) atomic_size_exchange(&(var), (val))
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static inline size_t
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atomic_size_exchange(size_t *ptr, size_t val)
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{
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size_t old = *ptr;
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*ptr = val;
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return old;
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}
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#endif
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#endif /* RUBY_ATOMIC_H */
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