Ñò b/Fc@sOdZyddkZWnej oddkZnXddd„ƒYZdS(s Synchronization primitives: - reader-writer lock (preference to writers) (Contributed to Django by eugene@lazutkin.com) iÿÿÿÿNtRWLockcBs;eZdZd„Zd„Zd„Zd„Zd„ZRS(s( Classic implementation of reader-writer lock with preference to writers. Readers can access a resource simultaneously. Writers get an exclusive access. API is self-descriptive: reader_enters() reader_leaves() writer_enters() writer_leaves() cCs[tiƒ|_tidƒ|_tidƒ|_d|_d|_d|_d|_ dS(Ni( t threadingtRLocktmutext Semaphoretcan_readt can_writetactive_readerstactive_writerstwaiting_readerstwaiting_writers(tself((s</usr/local/lib/python2.6/dist-packages/django/utils/synch.pyt__init__s   cCs‚|iiƒzS|idjo0|idjo |id7_|iiƒn|id7_Wd|iiƒX|iiƒdS(Nii(RtacquireRR RRtreleaseR (R ((s</usr/local/lib/python2.6/dist-packages/django/utils/synch.pyt reader_enters$s  cCs„|iiƒzb|id8_|idjo?|idjo/|id7_|id8_|iiƒnWd|iiƒXdS(Nii(RR RR RRR(R ((s</usr/local/lib/python2.6/dist-packages/django/utils/synch.pyt reader_leaves0s  cCs’|iiƒzc|idjo@|idjo0|idjo |id7_|iiƒn|id7_Wd|iiƒX|iiƒdS(Nii(RR RR RRR(R ((s</usr/local/lib/python2.6/dist-packages/django/utils/synch.pyt writer_enters;s 0cCsÕ|iiƒz³|id8_|idjo/|id7_|id8_|iiƒnb|idjoQ|i}d|_|i|7_x-|djo|iiƒ|d8}q’WnWd|iiƒXdS(Nii( RR RR RRR RR(R tt((s</usr/local/lib/python2.6/dist-packages/django/utils/synch.pyt writer_leavesGs      (t__name__t __module__t__doc__R RRRR(((s</usr/local/lib/python2.6/dist-packages/django/utils/synch.pyRs   ((RRt ImportErrortdummy_threadingR(((s</usr/local/lib/python2.6/dist-packages/django/utils/synch.pyts