Ruby  1.9.3p448(2013-06-27revision41675)
ruby_atomic.h
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00001 #ifndef RUBY_ATOMIC_H
00002 #define RUBY_ATOMIC_H
00003 
00004 #if 0
00005 #elif defined HAVE_GCC_ATOMIC_BUILTINS
00006 /* @shyouhei hack to support atomic operations in case of gcc. Gcc
00007  * has its own pseudo-insns to support them.  See info, or
00008  * http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html */
00009 
00010 typedef unsigned int rb_atomic_t; /* Anything OK */
00011 # define ATOMIC_SET(var, val)  (void)__sync_lock_test_and_set(&(var), (val))
00012 # define ATOMIC_INC(var) __sync_fetch_and_add(&(var), 1)
00013 # define ATOMIC_DEC(var) __sync_fetch_and_sub(&(var), 1)
00014 # define ATOMIC_OR(var, val) __sync_or_and_fetch(&(var), (val))
00015 # define ATOMIC_EXCHANGE(var, val) __sync_lock_test_and_set(&(var), (val))
00016 
00017 # define ATOMIC_SIZE_ADD(var, val) __sync_fetch_and_add(&(var), (val))
00018 # define ATOMIC_SIZE_SUB(var, val) __sync_fetch_and_sub(&(var), (val))
00019 # define ATOMIC_SIZE_INC(var) __sync_fetch_and_add(&(var), 1)
00020 # define ATOMIC_SIZE_DEC(var) __sync_fetch_and_sub(&(var), 1)
00021 # define ATOMIC_SIZE_EXCHANGE(var, val) __sync_lock_test_and_set(&(var), (val))
00022 
00023 #elif defined _WIN32
00024 #if defined _MSC_VER && _MSC_VER > 1200
00025 #pragma intrinsic(_InterlockedOr)
00026 #endif
00027 typedef LONG rb_atomic_t;
00028 
00029 # define ATOMIC_SET(var, val) InterlockedExchange(&(var), (val))
00030 # define ATOMIC_INC(var) InterlockedIncrement(&(var))
00031 # define ATOMIC_DEC(var) InterlockedDecrement(&(var))
00032 #if defined __GNUC__
00033 # define ATOMIC_OR(var, val) __asm__("lock\n\t" "orl\t%1, %0" : "=m"(var) : "Ir"(val))
00034 #elif defined _MSC_VER && _MSC_VER <= 1200
00035 # define ATOMIC_OR(var, val) rb_w32_atomic_or(&(var), (val))
00036 static inline void
00037 rb_w32_atomic_or(volatile rb_atomic_t *var, rb_atomic_t val)
00038 {
00039 #ifdef _M_IX86
00040     __asm mov eax, var;
00041     __asm mov ecx, val;
00042     __asm lock or [eax], ecx;
00043 #else
00044 #error unsupported architecture
00045 #endif
00046 }
00047 #else
00048 # define ATOMIC_OR(var, val) _InterlockedOr(&(var), (val))
00049 #endif
00050 # define ATOMIC_EXCHANGE(var, val) InterlockedExchange(&(var), (val))
00051 
00052 # ifdef _M_AMD64
00053 #  define ATOMIC_SIZE_ADD(var, val) InterlockedExchangeAdd64(&(var), (val))
00054 #  define ATOMIC_SIZE_SUB(var, val) InterlockedExchangeAdd64(&(var), -(val))
00055 #  define ATOMIC_SIZE_INC(var) InterlockedIncrement64(&(var))
00056 #  define ATOMIC_SIZE_DEC(var) InterlockedDecrement64(&(var))
00057 #  define ATOMIC_SIZE_EXCHANGE(var, val) InterlockedExchange64(&(var), (val))
00058 # else
00059 #  define ATOMIC_SIZE_ADD(var, val) InterlockedExchangeAdd((LONG *)&(var), (val))
00060 #  define ATOMIC_SIZE_SUB(var, val) InterlockedExchangeAdd((LONG *)&(var), -(val))
00061 #  define ATOMIC_SIZE_INC(var) InterlockedIncrement((LONG *)&(var))
00062 #  define ATOMIC_SIZE_DEC(var) InterlockedDecrement((LONG *)&(var))
00063 #  define ATOMIC_SIZE_EXCHANGE(var, val) InterlockedExchange((LONG *)&(var), (val))
00064 # endif
00065 
00066 #elif defined(__sun) && defined(HAVE_ATOMIC_H)
00067 #include <atomic.h>
00068 typedef unsigned int rb_atomic_t;
00069 
00070 # define ATOMIC_SET(var, val) (void)atomic_swap_uint(&(var), (val))
00071 # define ATOMIC_INC(var) atomic_inc_uint(&(var))
00072 # define ATOMIC_DEC(var) atomic_dec_uint(&(var))
00073 # define ATOMIC_OR(var, val) atomic_or_uint(&(var), (val))
00074 # define ATOMIC_EXCHANGE(var, val) atomic_swap_uint(&(var), (val))
00075 
00076 # if SIZEOF_SIZE_T == SIZEOF_LONG
00077 #  define ATOMIC_SIZE_ADD(var, val) atomic_add_long(&(var), (val))
00078 #  define ATOMIC_SIZE_SUB(var, val) atomic_add_long(&(var), -(val))
00079 #  define ATOMIC_SIZE_INC(var) atomic_inc_ulong(&(var))
00080 #  define ATOMIC_SIZE_DEC(var) atomic_dec_ulong(&(var))
00081 #  define ATOMIC_SIZE_EXCHANGE(var, val) atomic_swap_ulong(&(var), (val))
00082 # else
00083 #  define ATOMIC_SIZE_ADD(var, val) atomic_add_int(&(var), (val))
00084 #  define ATOMIC_SIZE_SUB(var, val) atomic_add_int(&(var), -(val))
00085 #  define ATOMIC_SIZE_INC(var) atomic_inc_uint(&(var))
00086 #  define ATOMIC_SIZE_DEC(var) atomic_dec_uint(&(var))
00087 #  define ATOMIC_SIZE_EXCHANGE(var, val) atomic_swap_uint(&(var), (val))
00088 # endif
00089 
00090 #else
00091 typedef int rb_atomic_t;
00092 #define NEED_RUBY_ATOMIC_EXCHANGE
00093 extern rb_atomic_t ruby_atomic_exchange(rb_atomic_t *ptr, rb_atomic_t val);
00094 
00095 # define ATOMIC_SET(var, val) (void)((var) = (val))
00096 # define ATOMIC_INC(var) ((var)++)
00097 # define ATOMIC_DEC(var) ((var)--)
00098 # define ATOMIC_OR(var, val) ((var) |= (val))
00099 # define ATOMIC_EXCHANGE(var, val) ruby_atomic_exchange(&(var), (val))
00100 
00101 # define ATOMIC_SIZE_ADD(var, val) (void)((var) += (val))
00102 # define ATOMIC_SIZE_SUB(var, val) (void)((var) -= (val))
00103 # define ATOMIC_SIZE_INC(var) ((var)++)
00104 # define ATOMIC_SIZE_DEC(var) ((var)--)
00105 # define ATOMIC_SIZE_EXCHANGE(var, val) atomic_size_exchange(&(var), (val))
00106 static inline size_t
00107 atomic_size_exchange(size_t *ptr, size_t val)
00108 {
00109     size_t old = *ptr;
00110     *ptr = val;
00111     return old;
00112 }
00113 #endif
00114 
00115 #endif /* RUBY_ATOMIC_H */
00116