54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
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/****************************************************************
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* *
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* Copyright 2001 Sanchez Computer Associates, Inc. *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#define STARVED -1
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#define BLOCKED 0
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#define GRANTED 1
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/* One for each blocked client process waiting for a lock */
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typedef struct cm_lckblkprc_struct
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{
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struct cm_lckblkprc_struct *next;
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struct cm_lckblkprc_struct *last;
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struct cs_struct *user;
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mlk_shrblk_ptr_t blocked;
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uint4 blk_sequence;
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} cm_lckblkprc;
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typedef cm_lckblkprc *cm_lckblkprc_ptr_t;
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/* One for each blocked client lock being waited on */
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typedef struct cm_lckblklck_struct
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{
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struct cm_lckblklck_struct *next;
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struct cm_lckblklck_struct *last;
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mlk_shrblk_ptr_t node;
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cm_lckblkprc_ptr_t prc;
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uint4 sequence; /* Used to determine when we should retry lock */
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ABS_TIME blktime;
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} cm_lckblklck;
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typedef cm_lckblklck *cm_lckblklck_ptr_t;
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/* One for each region having a blocked lock */
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typedef struct cm_lckblkreg_struct
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{
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struct cm_region_head_struct *region;
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struct cm_lckblkreg_struct *next;
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cm_lckblklck_ptr_t lock;
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uint4 pass;
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} cm_lckblkreg;
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typedef cm_lckblkreg *cm_lckblkreg_ptr_t;
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#define CM_LKBLK_TIME 16000 /* ms */
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#define CM_LKSTARVE_TIME 500 /* ms */
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