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https://github.com/ruby/ruby.git
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34fd7241e4
There are cases when sizeof(int) == sizeof(long) == sizeof(size_t). On such cases however int and long are incompatible types in theory. We should not assume typedef long size_t, because on Solaris size_t is actually a typedef of int. This reduces compiler warnings on such situations.
244 lines
8.9 KiB
C
244 lines
8.9 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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typedef unsigned int rb_atomic_t;
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# define ATOMIC_SET(var, val) (void)__atomic_exchange_n(&(var), (val), __ATOMIC_SEQ_CST)
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# define ATOMIC_INC(var) __atomic_fetch_add(&(var), 1, __ATOMIC_SEQ_CST)
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# define ATOMIC_DEC(var) __atomic_fetch_sub(&(var), 1, __ATOMIC_SEQ_CST)
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# define ATOMIC_OR(var, val) __atomic_fetch_or(&(var), (val), __ATOMIC_SEQ_CST)
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# define ATOMIC_EXCHANGE(var, val) __atomic_exchange_n(&(var), (val), __ATOMIC_SEQ_CST)
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# define ATOMIC_CAS(var, oldval, newval) RB_GNUC_EXTENSION_BLOCK( \
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__typeof__(var) oldvaldup = (oldval); /* oldval should not be modified */ \
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__atomic_compare_exchange_n(&(var), &oldvaldup, (newval), 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); \
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oldvaldup )
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# define ATOMIC_SIZE_ADD(var, val) __atomic_fetch_add(&(var), (val), __ATOMIC_SEQ_CST)
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# define ATOMIC_SIZE_SUB(var, val) __atomic_fetch_sub(&(var), (val), __ATOMIC_SEQ_CST)
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# define RUBY_ATOMIC_GENERIC_MACRO 1
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#elif defined HAVE_GCC_SYNC_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_fetch_and_or(&(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 RUBY_ATOMIC_GENERIC_MACRO 1
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#elif defined _WIN32
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#if MSC_VERSION_SINCE(1300)
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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 MSC_VERSION_BEFORE(1300)
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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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# if MSC_VERSION_BEFORE(1300)
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static inline rb_atomic_t
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rb_w32_atomic_cas(volatile rb_atomic_t *var, rb_atomic_t oldval, rb_atomic_t newval)
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{
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return (rb_atomic_t)InterlockedCompareExchange((PVOID *)var, (PVOID)newval, (PVOID)oldval);
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}
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# undef ATOMIC_CAS
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# define ATOMIC_CAS(var, oldval, newval) rb_w32_atomic_cas(&(var), (oldval), (newval))
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# endif
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# ifdef _M_AMD64
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# define ATOMIC_SIZE_ADD(var, val) InterlockedExchangeAdd64((LONG_LONG *)&(var), (val))
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# define ATOMIC_SIZE_SUB(var, val) InterlockedExchangeAdd64((LONG_LONG *)&(var), -(LONG)(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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# define ATOMIC_SIZE_CAS(var, oldval, newval) InterlockedCompareExchange64(&(var), (newval), (oldval))
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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), -(LONG)(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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# ifdef InterlockedExchangePointer
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# define ATOMIC_PTR_EXCHANGE(var, val) InterlockedExchangePointer((PVOID volatile *)&(var), (PVOID)(val))
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# endif /* See below for definitions of other situations */
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#elif defined(__sun) && defined(HAVE_ATOMIC_H)
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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 defined(_LP64) || defined(_I32LPx)
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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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# define ATOMIC_SIZE_CAS(var, oldval, val) atomic_cas_ulong(&(var), (oldval), (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_EXCHANGE(var, val) ruby_atomic_size_exchange(&(var), (val))
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static inline size_t
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ruby_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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#ifndef ATOMIC_SIZE_INC
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# define ATOMIC_SIZE_INC(var) ATOMIC_INC(var)
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#endif
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#ifndef ATOMIC_SIZE_DEC
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# define ATOMIC_SIZE_DEC(var) ATOMIC_DEC(var)
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#endif
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#ifndef ATOMIC_SIZE_EXCHANGE
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# define ATOMIC_SIZE_EXCHANGE(var, val) ATOMIC_EXCHANGE(var, val)
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#endif
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#ifndef ATOMIC_SIZE_CAS
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# define ATOMIC_SIZE_CAS(var, oldval, val) ATOMIC_CAS(var, oldval, val)
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#endif
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#if RUBY_ATOMIC_GENERIC_MACRO
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# ifndef ATOMIC_PTR_EXCHANGE
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# define ATOMIC_PTR_EXCHANGE(var, val) ATOMIC_EXCHANGE(var, val)
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# endif
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# ifndef ATOMIC_PTR_CAS
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# define ATOMIC_PTR_CAS(var, oldval, newval) ATOMIC_CAS(var, oldval, newval)
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# endif
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# ifndef ATOMIC_VALUE_EXCHANGE
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# define ATOMIC_VALUE_EXCHANGE(var, val) ATOMIC_EXCHANGE(var, val)
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# endif
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# ifndef ATOMIC_VALUE_CAS
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# define ATOMIC_VALUE_CAS(var, oldval, val) ATOMIC_CAS(var, oldval, val)
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# endif
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#endif
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#ifndef ATOMIC_PTR_EXCHANGE
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# if SIZEOF_VOIDP == SIZEOF_SIZE_T
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# define ATOMIC_PTR_EXCHANGE(var, val) (void *)ATOMIC_SIZE_EXCHANGE(*(size_t *)&(var), (size_t)(val))
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# else
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# define ATOMIC_PTR_EXCHANGE(var, val) ruby_atomic_ptr_exchange((const void **)&(var), (val))
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static inline void *
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ruby_atomic_ptr_exchange(const void **ptr, const void *val)
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{
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const void *const old = *ptr;
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*ptr = val;
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return (void *)old;
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}
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# endif
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#endif
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#ifndef ATOMIC_PTR_CAS
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# if SIZEOF_VOIDP == SIZEOF_SIZE_T
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# define ATOMIC_PTR_CAS(var, oldval, val) (void *)ATOMIC_SIZE_CAS(*(size_t *)&(var), (size_t)(oldval), (size_t)(val))
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# else
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# define ATOMIC_PTR_CAS(var, oldval, val) ruby_atomic_ptr_cas(&(var), (oldval), (val))
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static inline void *
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ruby_atomic_ptr_cas(const void **ptr, const void *oldval, const void *val)
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{
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const void *const old = *ptr;
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if (old == oldval) *ptr = val;
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return (void *)old;
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}
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# endif
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#endif
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#ifndef ATOMIC_VALUE_EXCHANGE
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# if SIZEOF_VALUE == SIZEOF_SIZE_T
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# define ATOMIC_VALUE_EXCHANGE(var, val) ATOMIC_SIZE_EXCHANGE(*(size_t *)&(var), (size_t)(val))
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# else
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# define ATOMIC_VALUE_EXCHANGE(var, val) ruby_atomic_value_exchange(&(var), (val))
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static inline VALUE
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ruby_atomic_value_exchange(VALUE *ptr, VALUE val)
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{
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const VALUE 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
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#ifndef ATOMIC_VALUE_CAS
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# if SIZEOF_VALUE == SIZEOF_SIZE_T
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# define ATOMIC_VALUE_CAS(var, oldval, val) ATOMIC_SIZE_CAS(*(size_t *)&(var), (size_t)(oldval), (size_t)(val))
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# else
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# define ATOMIC_VALUE_CAS(var, oldval, val) ruby_atomic_value_cas(&(var), (oldval), (val))
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static inline VALUE
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ruby_atomic_value_cas(VALUE *ptr, VALUE oldval, VALUE val)
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{
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const VALUE old = *ptr;
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if (old == oldval) *ptr = val;
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return old;
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}
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# endif
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#endif
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#endif /* RUBY_ATOMIC_H */
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