[Bug libobjc/47031] New: libobjc uses mutexes for properties

[js-gcc at webkeks dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47031

           Summary: libobjc uses mutexes for properties
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libobjc
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: js-gcc@webkeks.org


In trunk, libobjc uses objc_mutex_t for properties. This means that each time
you set a property, a lock in kernelspace is acquired, though most of the time
there is not even a lock held and if it is only for a very short time.
As properties are used quite often, spinlock should be used here, as locks will
be a performance problem.