1 /*
2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef OS_CPU_BSD_X86_VM_ORDERACCESS_BSD_X86_INLINE_HPP
26 #define OS_CPU_BSD_X86_VM_ORDERACCESS_BSD_X86_INLINE_HPP
27
28 #include "runtime/atomic.inline.hpp"
29 #include "runtime/orderAccess.hpp"
30 #include "runtime/os.hpp"
31 #include "vm_version_x86.hpp"
32
33 // Implementation of class OrderAccess.
34
35 inline void OrderAccess::loadload() { acquire(); }
36 inline void OrderAccess::storestore() { release(); }
37 inline void OrderAccess::loadstore() { acquire(); }
38 inline void OrderAccess::storeload() { fence(); }
39
40 inline void OrderAccess::acquire() {
41 volatile intptr_t local_dummy;
42 #ifdef AMD64
43 __asm__ volatile ("movq 0(%%rsp), %0" : "=r" (local_dummy) : : "memory");
44 #else
45 __asm__ volatile ("movl 0(%%esp),%0" : "=r" (local_dummy) : : "memory");
46 #endif // AMD64
47 }
48
49 inline void OrderAccess::release() {
50 // Avoid hitting the same cache-line from
51 // different threads.
|
1 /*
2 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef OS_CPU_BSD_X86_VM_ORDERACCESS_BSD_X86_INLINE_HPP
26 #define OS_CPU_BSD_X86_VM_ORDERACCESS_BSD_X86_INLINE_HPP
27
28 #include "runtime/atomic.inline.hpp"
29 #include "runtime/orderAccess.hpp"
30 #include "runtime/os.hpp"
31
32 // Implementation of class OrderAccess.
33
34 inline void OrderAccess::loadload() { acquire(); }
35 inline void OrderAccess::storestore() { release(); }
36 inline void OrderAccess::loadstore() { acquire(); }
37 inline void OrderAccess::storeload() { fence(); }
38
39 inline void OrderAccess::acquire() {
40 volatile intptr_t local_dummy;
41 #ifdef AMD64
42 __asm__ volatile ("movq 0(%%rsp), %0" : "=r" (local_dummy) : : "memory");
43 #else
44 __asm__ volatile ("movl 0(%%esp),%0" : "=r" (local_dummy) : : "memory");
45 #endif // AMD64
46 }
47
48 inline void OrderAccess::release() {
49 // Avoid hitting the same cache-line from
50 // different threads.
|