aa7543832a
libjava: * configure.in: Define SLOW_PTHREAD_SELF if configure.host set slow_pthread_self. Set up symlink for sysdeps directory. * configure.host: Document more shell variables. Set sysdeps_dir for most platforms. Set slow_pthread_self for i686. Set enable_hash_synchronization_default and slow_pthread_self for PowerPC. * posix-threads.cc (_Jv_ThreadSelf_out_of_line): Use release_set so that memory barrier is emitted where required. * include/posix-threads.h (_Jv_ThreadSelf for SLOW_PTHREAD_SELF): Add read_barrier() to enforce ordering of reads. * sysdep/powerpc/locks.h: New file. Implementation of synchronization primitives for PowerPC. * sysdep/i386/locks.h: New file. Synchronization primitives for i386 moved from natObject.cc. * sysdep/alpha/locks.h: Likewise. * sysdep/ia64/locks.h: Likewise. * sysdep/generic/locks.h: Likewise. * java/lang/natObject.cc: Move thread synchronization primitives to system-dependent headers. gcc/java: * decl.c (java_init_decl_processing): Make sure class_type_node alignment is not less than 64 bits if hash synchronization is enabled. boehm-gc: * include/gc_priv.h: Define ALIGN_DOUBLE on 32 bit targets if GCJ support is enabled, for hash synchronization. [[Split portion of a mixed commit.]] From-SVN: r50518.2
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
// locks.h - Thread synchronization primitives. Alpha 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. */
|
|
|
|
inline static bool
|
|
compare_and_swap(volatile obj_addr_t *addr,
|
|
obj_addr_t old,
|
|
obj_addr_t new_val)
|
|
{
|
|
unsigned long oldval;
|
|
char result;
|
|
__asm__ __volatile__(
|
|
"1:ldq_l %0, %1\n\t" \
|
|
"cmpeq %0, %5, %2\n\t" \
|
|
"beq %2, 2f\n\t" \
|
|
"mov %3, %0\n\t" \
|
|
"stq_c %0, %1\n\t" \
|
|
"bne %0, 2f\n\t" \
|
|
"br 1b\n\t" \
|
|
"2:mb"
|
|
: "=&r"(oldval), "=m"(*addr), "=&r"(result)
|
|
: "r" (new_val), "m"(*addr), "r"(old) : "memory");
|
|
return (bool) result;
|
|
}
|
|
|
|
inline static void
|
|
release_set(volatile obj_addr_t *addr, obj_addr_t new_val)
|
|
{
|
|
__asm__ __volatile__("mb" : : : "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
|