diff options
Diffstat (limited to 'db2/mp/mp_fget.c')
| -rw-r--r-- | db2/mp/mp_fget.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/db2/mp/mp_fget.c b/db2/mp/mp_fget.c index 1010751c92..f5955c4c6f 100644 --- a/db2/mp/mp_fget.c +++ b/db2/mp/mp_fget.c @@ -7,7 +7,7 @@ #include "config.h" #ifndef lint -static const char sccsid[] = "@(#)mp_fget.c 10.32 (Sleepycat) 11/26/97"; +static const char sccsid[] = "@(#)mp_fget.c 10.33 (Sleepycat) 12/2/97"; #endif /* not lint */ #ifndef NO_SYSTEM_INCLUDES @@ -272,8 +272,17 @@ found: /* Increment the reference count. */ * discarded we know the buffer can't move and its contents * can't change. */ - if (F_ISSET(bhp, BH_LOCKED)) { + for (cnt = 0; F_ISSET(bhp, BH_LOCKED); ++cnt) { UNLOCKREGION(dbmp); + + /* + * Sleep so that we don't simply spin, switching locks. + * (See the comment in include/mp.h.) + */ + if (cnt != 0 && + (__db_yield == NULL || __db_yield() != 0)) + __db_sleep(0, 1); + LOCKBUFFER(dbmp, bhp); /* Waiting for I/O to finish... */ UNLOCKBUFFER(dbmp, bhp); |