Lines Matching full:writer

47 /* Queue of readers waiting for the writer to finish */
119      * reader_count == 0: this means writer will read has_reader as 1  in bdrv_graph_wrlock()
120      * reader_count >= 1: we don't know if writer read has_writer == 0 or 1,  in bdrv_graph_wrlock()
181         /* make sure writer sees reader_count before we check has_writer */  in bdrv_graph_co_rdlock()
185          * has_writer == 0: this means writer will read reader_count as >= 1  in bdrv_graph_co_rdlock()
186          * has_writer == 1: we don't know if writer read reader_count == 0  in bdrv_graph_co_rdlock()
199          * Then the writer will read reader_count that does not take into  in bdrv_graph_co_rdlock()
204          * then writer will read reader_count >= 1.  in bdrv_graph_co_rdlock()
215              * Then the writer will set has_writer to 0 and wake up all readers,  in bdrv_graph_co_rdlock()
221              * again for has_writer, otherwise we sleep without any writer  in bdrv_graph_co_rdlock()
243     /* make sure writer sees reader_count before we check has_writer */  in bdrv_graph_co_rdunlock()
248      * has_writer == 1: we don't know if writer read reader_count old or  in bdrv_graph_co_rdunlock()
250      *                  writer will for sure read the updated value.  in bdrv_graph_co_rdunlock()