| 1 | /*
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| 2 | * Copyright (c) 2015 Michal Koutny
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef SYSMAN_JOB_H
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| 30 | #define SYSMAN_JOB_H
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| 31 |
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| 32 | #include <adt/dyn_array.h>
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| 33 | #include <adt/list.h>
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| 34 | #include <atomic.h>
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| 35 | #include <stdbool.h>
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| 36 |
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| 37 | #include "unit.h"
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| 38 |
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| 39 | /** Run state of job */
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| 40 | typedef enum {
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| 41 | JOB_EMBRYO, /**< Job after creation */
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| 42 | JOB_CLOSURED, /**< Intermmediate when closure is evaluated */
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| 43 | JOB_PENDING, /**< Job is queued */
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| 44 | JOB_RUNNING,
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| 45 | JOB_FINISHED
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| 46 | } job_state_t;
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| 47 |
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| 48 | /** Return value of job */
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| 49 | typedef enum {
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| 50 | JOB_OK,
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| 51 | JOB_FAILED,
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| 52 | JOB_UNDEFINED_ = -1
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| 53 | } job_retval_t;
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| 54 |
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| 55 | struct job;
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| 56 | typedef struct job job_t;
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| 57 |
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| 58 | struct job {
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| 59 | link_t job_queue;
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| 60 | atomic_t refcnt;
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| 61 |
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| 62 | unit_state_t target_state;
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| 63 | unit_t *unit;
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| 64 |
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| 65 | /** Jobs that this job is preventing from running */
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| 66 | dyn_array_t blocked_jobs;
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| 67 | /** No. of jobs that the job is actually blocking (may differ from size
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| 68 | * of blocked_jobs for not fully merged job */
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| 69 | size_t blocked_jobs_count;
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| 70 | /** No. of jobs that must finish before this job */
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| 71 | size_t blocking_jobs;
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| 72 | /** Any of blocking jobs failed */
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| 73 | bool blocking_job_failed;
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| 74 | /** Job that this job was merged to */
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| 75 | job_t *merged_into;
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| 76 |
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| 77 | /** See job_state_t */
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| 78 | job_state_t state;
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| 79 | /** See job_retval_t */
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| 80 | job_retval_t retval;
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| 81 | };
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| 82 |
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| 83 | extern void job_queue_init(void);
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| 84 | extern int job_queue_add_closure(dyn_array_t *);
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| 85 | extern void job_queue_process(void);
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| 86 |
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| 87 | extern int job_create_closure(job_t *, dyn_array_t *);
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| 88 | extern job_t *job_create(unit_t *, unit_state_t);
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| 89 |
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| 90 | extern void job_add_ref(job_t *);
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| 91 | extern void job_del_ref(job_t **);
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| 92 |
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| 93 | extern void job_run(job_t *);
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| 94 | extern void job_finish(job_t *);
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| 95 | #endif
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