FreeBSD/Linux Kernel Cross Reference
sys/contrib/ck/include/ck_barrier.h

     /*
      * Copyright 2011-2015 Samy Al Bahra.
      * Copyright 2011 David Joseph.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #ifndef CK_BARRIER_H
    #define CK_BARRIER_H
    
    #include <ck_spinlock.h>
    
    struct ck_barrier_centralized {
            unsigned int value;
            unsigned int sense;
    };
    typedef struct ck_barrier_centralized ck_barrier_centralized_t;
    
    struct ck_barrier_centralized_state {
            unsigned int sense;
    };
    typedef struct ck_barrier_centralized_state ck_barrier_centralized_state_t;
    
    #define CK_BARRIER_CENTRALIZED_INITIALIZER       {0, 0}
    #define CK_BARRIER_CENTRALIZED_STATE_INITIALIZER {0}
    
    void ck_barrier_centralized(ck_barrier_centralized_t *,
        ck_barrier_centralized_state_t *, unsigned int);
    
    struct ck_barrier_combining_group {
            unsigned int k;
            unsigned int count;
            unsigned int sense;
            struct ck_barrier_combining_group *parent;
            struct ck_barrier_combining_group *left;
            struct ck_barrier_combining_group *right;
            struct ck_barrier_combining_group *next;
    } CK_CC_CACHELINE;
    typedef struct ck_barrier_combining_group ck_barrier_combining_group_t;
    
    struct ck_barrier_combining_state {
            unsigned int sense;
    };
    typedef struct ck_barrier_combining_state ck_barrier_combining_state_t;
    
    #define CK_BARRIER_COMBINING_STATE_INITIALIZER {~0}
    
    struct ck_barrier_combining {
            struct ck_barrier_combining_group *root;
            ck_spinlock_fas_t mutex;
    };
    typedef struct ck_barrier_combining ck_barrier_combining_t;
    
    void ck_barrier_combining_init(ck_barrier_combining_t *, ck_barrier_combining_group_t *);
    
    void ck_barrier_combining_group_init(ck_barrier_combining_t *,
        ck_barrier_combining_group_t *, unsigned int);
    
    void ck_barrier_combining(ck_barrier_combining_t *,
        ck_barrier_combining_group_t *,
        ck_barrier_combining_state_t *);
    
    struct ck_barrier_dissemination_flag {
            unsigned int tflag;
            unsigned int *pflag;
    };
    typedef struct ck_barrier_dissemination_flag ck_barrier_dissemination_flag_t;
    
    struct ck_barrier_dissemination {
            unsigned int nthr;
            unsigned int size;
            unsigned int tid;
            struct ck_barrier_dissemination_flag *flags[2];
    };
    typedef struct ck_barrier_dissemination ck_barrier_dissemination_t;
    
    struct ck_barrier_dissemination_state {
            int             parity;
            unsigned int    sense;
           unsigned int    tid;
   };
   typedef struct ck_barrier_dissemination_state ck_barrier_dissemination_state_t;
   
   void ck_barrier_dissemination_init(ck_barrier_dissemination_t *,
       ck_barrier_dissemination_flag_t **, unsigned int);
   
   void ck_barrier_dissemination_subscribe(ck_barrier_dissemination_t *,
       ck_barrier_dissemination_state_t *);
   
   unsigned int ck_barrier_dissemination_size(unsigned int);
   
   void ck_barrier_dissemination(ck_barrier_dissemination_t *,
       ck_barrier_dissemination_state_t *);
   
   struct ck_barrier_tournament_round {
           int role;
           unsigned int *opponent;
           unsigned int flag;
   };
   typedef struct ck_barrier_tournament_round ck_barrier_tournament_round_t;
   
   struct ck_barrier_tournament {
           unsigned int tid;
           unsigned int size;
           struct ck_barrier_tournament_round **rounds;
   };
   typedef struct ck_barrier_tournament ck_barrier_tournament_t;
   
   struct ck_barrier_tournament_state {
           unsigned int sense;
           unsigned int vpid;
   };
   typedef struct ck_barrier_tournament_state ck_barrier_tournament_state_t;
   
   void ck_barrier_tournament_subscribe(ck_barrier_tournament_t *,
                                        ck_barrier_tournament_state_t *);
   void ck_barrier_tournament_init(ck_barrier_tournament_t *,
                                   ck_barrier_tournament_round_t **,
                                   unsigned int);
   unsigned int ck_barrier_tournament_size(unsigned int);
   void ck_barrier_tournament(ck_barrier_tournament_t *, ck_barrier_tournament_state_t *);
   
   struct ck_barrier_mcs {
           unsigned int tid;
           unsigned int *children[2];
           unsigned int childnotready[4];
           unsigned int dummy;
           unsigned int havechild[4];
           unsigned int *parent;
           unsigned int parentsense;
   };
   typedef struct ck_barrier_mcs ck_barrier_mcs_t;
   
   struct ck_barrier_mcs_state {
           unsigned int sense;
           unsigned int vpid;
   };
   typedef struct ck_barrier_mcs_state ck_barrier_mcs_state_t;
   
   void ck_barrier_mcs_init(ck_barrier_mcs_t *, unsigned int);
   void ck_barrier_mcs_subscribe(ck_barrier_mcs_t *, ck_barrier_mcs_state_t *);
   void ck_barrier_mcs(ck_barrier_mcs_t *, ck_barrier_mcs_state_t *);
   
   #endif /* CK_BARRIER_H */

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