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gcc/libjava/sysdep/alpha/locks.h
Bryce McKinlay aa7543832a configure.in: Define SLOW_PTHREAD_SELF if configure.host set slow_pthread_self.
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
2002-03-10 03:31:08 +00:00

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