diff options
Diffstat (limited to 'db2/mutex/uts4_cc.s')
| -rw-r--r-- | db2/mutex/uts4_cc.s | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/db2/mutex/uts4_cc.s b/db2/mutex/uts4_cc.s deleted file mode 100644 index ee5f414..0000000 --- a/db2/mutex/uts4_cc.s +++ /dev/null @@ -1,21 +0,0 @@ - / - / int uts_lock ( int *p, int i ); - / Update the lock word pointed to by p with the - / value i, using compare-and-swap. - / Returns 0 if update was successful. - / Returns 1 if update failed. - / - entry uts_lock - uts_lock: - using .,r15 - st r2,8(sp) / Save R2 - l r2,64+0(sp) / R2 -> word to update - slr r0, r0 / R0 = current lock value must be 0 - l r1,64+4(sp) / R1 = new lock value - cs r0,r1,0(r2) / Try the update ... - be x / ... Success. Return 0 - la r0,1 / ... Failure. Return 1 - x: / - l r2,8(sp) / Restore R2 - b 2(,r14) / Return to caller - drop r15 |