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Diffstat (limited to 'db2/mutex/README')
| -rw-r--r-- | db2/mutex/README | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/db2/mutex/README b/db2/mutex/README index 30d6b6a7d1..fceeef7ed8 100644 --- a/db2/mutex/README +++ b/db2/mutex/README @@ -1,4 +1,4 @@ -# @(#)README 10.1 (Sleepycat) 4/12/97 +# @(#)README 10.2 (Sleepycat) 11/25/97 Resource locking routines: lock based on a db_mutex_t. All this gunk (including trying to make assembly code portable), is necessary because @@ -11,9 +11,9 @@ information. If HAVE_SPINLOCKS is defined (i.e. we know how to do test-and-sets for this compiler/architecture combination), we try and lock the resource tsl -TSL_DEFAULT_SPINS times. If we can't acquire the lock that way, we use -a system call to sleep for 10ms, 20ms, 40ms, etc. (The time is bounded -at 1 second, just in case.) Using the timer backoff means that there are +__db_tsl_spins times. If we can't acquire the lock that way, we use a +system call to sleep for 10ms, 20ms, 40ms, etc. (The time is bounded at +1 second, just in case.) Using the timer backoff means that there are two assumptions: that locks are held for brief periods (never over system calls or I/O) and that locks are not hotly contested. |