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Annotation of Gnu-Mach/xen/ring.h, revision 1.1

1.1     ! root        1: /*
        !             2:  *  Copyright (C) 2006-2009 Free Software Foundation
        !             3:  *
        !             4:  * This program is free software ; you can redistribute it and/or modify
        !             5:  * it under the terms of the GNU General Public License as published by
        !             6:  * the Free Software Foundation ; either version 2 of the License, or
        !             7:  * (at your option) any later version.
        !             8:  *
        !             9:  * This program is distributed in the hope that it will be useful,
        !            10:  * but WITHOUT ANY WARRANTY ; without even the implied warranty of
        !            11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
        !            12:  * GNU General Public License for more details.
        !            13:  *
        !            14:  * You should have received a copy of the GNU General Public License
        !            15:  * along with the program ; if not, write to the Free Software
        !            16:  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
        !            17:  */
        !            18: 
        !            19: #ifndef        XEN_RING_H
        !            20: #define        XEN_RING_H
        !            21: 
        !            22: typedef unsigned32_t hyp_ring_pos_t;
        !            23: 
        !            24: #define hyp_ring_idx(ring, pos) (((unsigned)(pos)) & (sizeof(ring)-1))
        !            25: #define hyp_ring_cell(ring, pos) (ring)[hyp_ring_idx((ring), (pos))]
        !            26: #define hyp_ring_smash(ring, prod, cons) (hyp_ring_idx((ring), (prod) + 1) == \
        !            27:                                 hyp_ring_idx((ring), (cons)))
        !            28: #define hyp_ring_available(ring, prod, cons) hyp_ring_idx((ring), (cons)-(prod)-1)
        !            29: 
        !            30: void hyp_ring_store(void *dest, const void *src, size_t size, void *start, void *end);
        !            31: void hyp_ring_fetch(void *dest, const void *src, size_t size, void *start, void *end);
        !            32: size_t hyp_ring_next_word(char **c, void *start, void *end);
        !            33: 
        !            34: #endif /* XEN_RING_H */

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