OCF depends on ENV_BUG_ON condition to be evaluated as it
may have side effects. So simple implementation with
"assert(!cond)" is not good enough as it will likely be noop
in release build.
Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
- Add cache trylock and read trylock functions.
- Introduce new error code -OCF_ERR_NO_LOCK.
- Change trylock functions in env to return this code in case of
lock contention.
[ENV CHANGES REQUIRED]
Following functions should return 0 on success or -OCF_ERR_NO_LOCK
in case of lock contention:
- env_mutex_trylock()
- env_rwsem_up_read_trylock()
- env_rwsem_up_write_trylock()
Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>
