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 #include "precompiled.hpp"
26 #include "runtime/atomic.hpp"
27 #ifdef TARGET_OS_FAMILY_linux
28 # include "os_linux.inline.hpp"
29 #endif
30 #ifdef TARGET_OS_FAMILY_solaris
31 # include "os_solaris.inline.hpp"
32 #endif
33 #ifdef TARGET_OS_FAMILY_windows
34 # include "os_windows.inline.hpp"
35 #endif
36 #ifdef TARGET_OS_FAMILY_bsd
37 # include "os_bsd.inline.hpp"
38 #endif
39
40 #include "runtime/atomic.inline.hpp"
41
42 jbyte Atomic::cmpxchg(jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) {
43 assert(sizeof(jbyte) == 1, "assumption.");
44 uintptr_t dest_addr = (uintptr_t)dest;
45 uintptr_t offset = dest_addr % sizeof(jint);
46 volatile jint* dest_int = (volatile jint*)(dest_addr - offset);
47 jint cur = *dest_int;
48 jbyte* cur_as_bytes = (jbyte*)(&cur);
49 jint new_val = cur;
50 jbyte* new_val_as_bytes = (jbyte*)(&new_val);
51 new_val_as_bytes[offset] = exchange_value;
52 while (cur_as_bytes[offset] == compare_value) {
53 jint res = cmpxchg(new_val, dest_int, cur);
54 if (res == cur) break;
55 cur = res;
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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 #include "precompiled.hpp"
26 #include "runtime/atomic.hpp"
27 #ifdef TARGET_OS_FAMILY_linux
28 # include "os_linux.inline.hpp"
29 #endif
30 #ifdef TARGET_OS_FAMILY_solaris
31 # include "os_solaris.inline.hpp"
32 #endif
33 #ifdef TARGET_OS_FAMILY_windows
34 # include "os_windows.inline.hpp"
35 #endif
36 #ifdef TARGET_OS_FAMILY_aix
37 # include "os_aix.inline.hpp"
38 #endif
39 #ifdef TARGET_OS_FAMILY_bsd
40 # include "os_bsd.inline.hpp"
41 #endif
42
43 #include "runtime/atomic.inline.hpp"
44
45 jbyte Atomic::cmpxchg(jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) {
46 assert(sizeof(jbyte) == 1, "assumption.");
47 uintptr_t dest_addr = (uintptr_t)dest;
48 uintptr_t offset = dest_addr % sizeof(jint);
49 volatile jint* dest_int = (volatile jint*)(dest_addr - offset);
50 jint cur = *dest_int;
51 jbyte* cur_as_bytes = (jbyte*)(&cur);
52 jint new_val = cur;
53 jbyte* new_val_as_bytes = (jbyte*)(&new_val);
54 new_val_as_bytes[offset] = exchange_value;
55 while (cur_as_bytes[offset] == compare_value) {
56 jint res = cmpxchg(new_val, dest_int, cur);
57 if (res == cur) break;
58 cur = res;
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