diff options
Diffstat (limited to 'libjava/sysdep/sh/locks.h')
-rw-r--r-- | libjava/sysdep/sh/locks.h | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/libjava/sysdep/sh/locks.h b/libjava/sysdep/sh/locks.h deleted file mode 100644 index f6076d60199..00000000000 --- a/libjava/sysdep/sh/locks.h +++ /dev/null @@ -1,72 +0,0 @@ -// locks.h - Thread synchronization primitives. SuperH implementation. - -/* Copyright (C) 2002 Free Software Foundation - - This file is part of libgcj. - -This software is copyrighted work licensed under the terms of the -Libgcj License. Please consult the file "LIBGCJ_LICENSE" for -details. */ - -#ifndef __SYSDEP_LOCKS_H__ -#define __SYSDEP_LOCKS_H__ - -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; -} - -inline static void -release_set (volatile obj_addr_t *addr, obj_addr_t new_val) -{ - __asm__ __volatile__ (" " : : : "memory"); - *(addr) = new_val; -} - -inline static bool -compare_and_swap_release (volatile obj_addr_t *addr, obj_addr_t old, - obj_addr_t new_val) -{ - return compare_and_swap (addr, old, new_val); -} - -#endif /* ! __SYSDEP_LOCKS_H__ */ |