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Annotation of coherent/f/usr/include/kernel/ddi_lock.h, revision 1.1

1.1     ! root        1: #ifndef        __KERNEL_DDI_LOCK_H__
        !             2: #define        __KERNEL_DDI_LOCK_H__
        !             3: 
        !             4: /*
        !             5:  * This is an internal header file, not intended for general use.
        !             6:  *
        !             7:  * This is a registry of value and constants for the lock hierarchy values
        !             8:  * recommended for use in internal DDI/DKI basic and read/write locking
        !             9:  * operations. Many of these hierarchy values are outside the range that
        !            10:  * are permitted to DDI/DKI-compliant drivers, and a special value in the
        !            11:  * "lk_flags" member of the "lkinfop" structure passed to LOCK_ALLOC () is
        !            12:  * necessary to permit access to this range of hierarchy values.
        !            13:  *
        !            14:  * We also specify a recommended minimum priority value here which should be
        !            15:  * used with the indicated lock whenever a specific value is not indicated.
        !            16:  */
        !            17: 
        !            18: enum {
        !            19:        INTERNAL_LOCK = 1,              /* access to reserved hierarchies */
        !            20: 
        !            21:        /*
        !            22:         * For polling, the global lock nests outside the "pollhead" lock
        !            23:         * which nests outside the "pollwait" lock.
        !            24:         */
        !            25: 
        !            26:        pollwait_hierarchy = 40,
        !            27: #define        pollwait_priority       plhi
        !            28: 
        !            29:        pollhead_hierarchy = 39,
        !            30: #define        pollhead_priority       plhi
        !            31: 
        !            32:        poll_global_hierarchy = 38,
        !            33: #define        poll_global_priority    plhi
        !            34: 
        !            35: 
        !            36:        /*
        !            37:         * For the timeout system. The timeout code calls defer_int_cpu ().
        !            38:         */
        !            39: 
        !            40:        timeout_global_hierarchy = 39,
        !            41: #define        timeout_global_priority plhi
        !            42: 
        !            43: 
        !            44:        /*
        !            45:         * For the defer system.
        !            46:         */
        !            47: 
        !            48:        defer_hierarchy = 40,
        !            49: #define        defer_priority          plhi
        !            50: 
        !            51: 
        !            52:        /*
        !            53:         * Process-related locks.
        !            54:         */
        !            55: 
        !            56:        proc_global_hierarchy = 40,
        !            57: #define        proc_global_priority    plhi
        !            58: 
        !            59: 
        !            60:        /*
        !            61:         * For streams, the stream directory lock nests outside the stream
        !            62:         * head lock, which nests outside STREAMS memory allocation. STREAMS
        !            63:         * locks are all at "plstr" by definition *except* for the streams
        !            64:         * heap locks, which have a priority conditional on various factors.
        !            65:         * Both of the streams heap locks call defer... () routines.
        !            66:         */
        !            67: 
        !            68:        stream_heap_hierarchy = 39,
        !            69:        stream_head_hierarchy = 38,
        !            70:        stream_dir_hierarchy = 37,
        !            71: 
        !            72: 
        !            73:        /*
        !            74:         * The STREAMS schedule, bufcall event, qprocsoff (), and trace-
        !            75:         * sequence locks are all disjoint.
        !            76:         */
        !            77: 
        !            78:        stream_schedule_hierarchy = 40,
        !            79:        stream_event_hierarchy = 40,
        !            80:        stream_proc_hierarchy = 40,
        !            81:        stream_seq_hierarchy = 40
        !            82: 
        !            83: };
        !            84: 
        !            85: #endif /* ! defined (__KERNEL_DDI_LOCK_H__) */

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