diff options
Diffstat (limited to 'innobase/include/os0sync.ic')
| -rw-r--r-- | innobase/include/os0sync.ic | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/innobase/include/os0sync.ic b/innobase/include/os0sync.ic index 6bff75d8ec6..10b85c435e3 100644 --- a/innobase/include/os0sync.ic +++ b/innobase/include/os0sync.ic @@ -27,7 +27,21 @@ os_fast_mutex_trylock( return(0); #else +#if defined(UNIV_HOTBACKUP) && defined(UNIV_HPUX10) + /* Since the hot backup version is standalone, MySQL does not redefine + pthread_mutex_trylock for HP-UX-10.20, and consequently we must invert + the return value here */ + + return((ulint) (1 - pthread_mutex_trylock(fast_mutex))); +#else + /* NOTE that the MySQL my_pthread.h redefines pthread_mutex_trylock + so that it returns 0 on success. In the operating system + libraries, HP-UX-10.20 follows the old Posix 1003.4a Draft 4 and + returns 1 on success (but MySQL remaps that to 0), while Linux, + FreeBSD, Solaris, AIX, Tru64 Unix, HP-UX-11.0 return 0 on success. */ + return((ulint) pthread_mutex_trylock(fast_mutex)); #endif +#endif } |