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59 lines
2.2 KiB
C
59 lines
2.2 KiB
C
/* Finit state machine
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*
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* Copyright (c) 2016 Jonas Johansson <jonas.johansson@westermo.se>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef FINIT_SM_H_
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#define FINIT_SM_H_
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typedef enum {
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SM_BOOTSTRAP_STATE = 0, /* Init state, bootstrap services */
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SM_RUNNING_STATE, /* Normal state, services running */
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SM_RUNLEVEL_CHANGE_STATE, /* A runlevel change has occured */
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SM_RUNLEVEL_WAIT_STATE, /* Waiting for all stopped runlevel processes to be halted */
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SM_RELOAD_CHANGE_STATE, /* A reload event has occured */
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SM_RELOAD_WAIT_STATE, /* Waiting for all stopped reload processes to be halted */
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} sm_state_t;
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typedef struct sm {
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sm_state_t state; /* Running, Changed, Waiting, ... */
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int newlevel; /* Set on runlevel change to new runlevel, -1 if not change */
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int reload; /* Set on reload event, else 0 */
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int in_teardown; /* Set when waiting for all processes to be halted */
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} sm_t;
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extern sm_t sm;
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void sm_init(sm_t *sm);
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void sm_step(sm_t *sm);
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void sm_set_runlevel(sm_t *sm, int newlevel);
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void sm_set_reload(sm_t *sm);
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int sm_is_in_teardown(sm_t *sm);
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#endif /* FINIT_SM_H_ */
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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