diff options
Diffstat (limited to 'signal.c')
-rw-r--r-- | signal.c | 34 |
1 files changed, 8 insertions, 26 deletions
@@ -16,33 +16,15 @@ #include <signal.h> #include <stdio.h> #include <errno.h> +#include "atomic.h" -#ifdef _WIN32 -typedef LONG rb_atomic_t; - -# define ATOMIC_TEST(var) InterlockedExchange(&(var), 0) -# define ATOMIC_SET(var, val) InterlockedExchange(&(var), (val)) -# define ATOMIC_INC(var) InterlockedIncrement(&(var)) -# define ATOMIC_DEC(var) InterlockedDecrement(&(var)) - -#elif defined HAVE_GCC_ATOMIC_BUILTINS -/* @shyouhei hack to support atomic operations in case of gcc. Gcc - * has its own pseudo-insns to support them. See info, or - * http://gcc.gnu.org/onlinedocs/gcc/Atomic-Builtins.html */ - -typedef unsigned int rb_atomic_t; /* Anything OK */ -# define ATOMIC_TEST(var) __sync_lock_test_and_set(&(var), 0) -# define ATOMIC_SET(var, val) __sync_lock_test_and_set(&(var), (val)) -# define ATOMIC_INC(var) __sync_fetch_and_add(&(var), 1) -# define ATOMIC_DEC(var) __sync_fetch_and_sub(&(var), 1) - -#else -typedef int rb_atomic_t; - -# define ATOMIC_TEST(var) ((var) ? ((var) = 0, 1) : 0) -# define ATOMIC_SET(var, val) ((var) = (val)) -# define ATOMIC_INC(var) (++(var)) -# define ATOMIC_DEC(var) (--(var)) +#if !defined(_WIN32) && !defined(HAVE_GCC_ATOMIC_BUILTINS) +rb_atomic_t ruby_atomic_exchange(rb_atomic_t *ptr, rb_atomic_t val) +{ + rb_atomic_t old = *ptr; + *ptr = val; + return old; +} #endif #if defined(__BEOS__) || defined(__HAIKU__) |