From bed3fc4127dc82a24d2ee16c06dcf832a8becebd Mon Sep 17 00:00:00 2001 From: Kaz Kojima Date: Thu, 14 Jun 2012 22:58:05 +0000 Subject: Update sysdep/sh/locks.h with atomic builtins Update sysdep/sh/locks.h with atomic builtins * sysdep/sh/locks.h (__cas_lock): Remove. (__cas_start_atomic, __cas_end_atomic): Likewise. (compare_and_swap): Call __sync_bool_compare_and_swap. From-SVN: r188640 --- libjava/sysdep/sh/locks.h | 36 +----------------------------------- 1 file changed, 1 insertion(+), 35 deletions(-) (limited to 'libjava/sysdep') diff --git a/libjava/sysdep/sh/locks.h b/libjava/sysdep/sh/locks.h index 9a152fb..727c3aa 100644 --- a/libjava/sysdep/sh/locks.h +++ b/libjava/sysdep/sh/locks.h @@ -14,45 +14,11 @@ details. */ typedef size_t obj_addr_t; /* Integer type big enough for object */ /* address. */ -static unsigned char __cas_lock = 0; - -inline static void -__cas_start_atomic (void) -{ - unsigned int val; - - do - __asm__ __volatile__ ("tas.b @%1; movt %0" - : "=r" (val) - : "r" (&__cas_lock) - : "memory"); - while (val == 0); -} - -inline static void -__cas_end_atomic (void) -{ - __asm__ __volatile__ (" " : : : "memory"); - __cas_lock = 0; -} - inline static bool compare_and_swap (volatile obj_addr_t *addr, obj_addr_t old, obj_addr_t new_val) { - bool ret; - - __cas_start_atomic (); - if (*addr != old) - ret = false; - else - { - *addr = new_val; - ret = true; - } - __cas_end_atomic (); - - return ret; + return __sync_bool_compare_and_swap (addr, old, new_val); } inline static void -- cgit v1.1