ea3e1fc875
directory and GNU autotools setup. Change-Id: I6c59d1297389c9413db0c0b9bdf3b759080bf1b8 Signed-off-by: Ole Troan <ot@cisco.com>
140 lines
3.4 KiB
C
140 lines
3.4 KiB
C
/*
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*------------------------------------------------------------------
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* spp_timers.h
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*
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* Copyright (c) 2008-2009 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*------------------------------------------------------------------
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*/
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#ifndef __SPP_TIMERS_H__
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#define __SPP_TIMERS_H__
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typedef struct d_list_el_ {
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struct d_list_el_ *next;
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struct d_list_el_ *prev;
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} d_list_el_t;
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/*
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* d_list_init
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*/
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static inline void d_list_init (d_list_el_t *headp)
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{
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headp->prev = headp->next = headp;
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}
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/*
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* d_list_init - add at head of list
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*/
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static inline void d_list_add_head (d_list_el_t *headp,
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d_list_el_t *elp)
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{
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ASSERT(elp->prev == elp); /* multiple enqueue, BAD! */
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ASSERT(elp->next == elp);
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elp->next = headp->next;
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headp->next = elp;
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elp->prev = elp->next->prev;
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elp->next->prev = elp;
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}
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/*
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* d_list_add_tail - add element at tail of list
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*/
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static inline void d_list_add_tail (d_list_el_t *headp,
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d_list_el_t *elp)
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{
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ASSERT(elp->prev == elp); /* multiple enqueue, BAD! */
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ASSERT(elp->next == elp);
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headp = headp->prev;
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elp->next = headp->next;
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headp->next = elp;
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elp->prev = elp->next->prev;
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elp->next->prev = elp;
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}
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/*
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* d_list_rem_head - removes first element from list
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*/
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static inline d_list_el_t *d_list_rem_head (d_list_el_t *headp)
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{
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d_list_el_t *elp;
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elp = headp->next;
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if (elp == headp)
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return (NULL);
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headp->next = elp->next;
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elp->next->prev = elp->prev;
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elp->next = elp->prev = elp;
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return (elp);
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}
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/*
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* d_list_rem_elem - removes specific element from list.
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*/
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static inline void d_list_rem_elem (d_list_el_t *elp)
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{
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d_list_el_t *headp;
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headp = elp->prev;
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headp->next = elp->next;
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elp->next->prev = elp->prev;
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elp->next = elp->prev = elp;
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}
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#define TIMER_BKTS_PER_WHEEL 128 /* power of 2, please */
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#define TIMER_NWHEELS 4
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typedef struct {
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i32 curindex; /* current index for this wheel */
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d_list_el_t *bkts; /* vector of bucket listheads */
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} spp_timer_wheel_t;
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typedef struct {
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u64 next_run_ticks; /* Next time we expire timers */
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spp_timer_wheel_t **wheels; /* pointers to wheels */
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} spp_timer_axle_t;
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typedef struct {
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d_list_el_t el;
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u16 cb_index;
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u16 flags;
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u64 expires;
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} spp_timer_t;
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#define SPP_TIMER_RUNNING 0x0001
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/*
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* prototypes
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*/
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void spp_timer_set_ticks_per_ms(u64);
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void spp_timer_axle_init (spp_timer_axle_t *ta);
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void spp_timer_expire(spp_timer_axle_t *ta, u64 now);
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void spp_timer_final_init(void);
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void spp_timer_start(spp_timer_t *tp);
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void spp_timer_start_axle(spp_timer_axle_t *ta, spp_timer_t *tp);
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void spp_timer_stop(spp_timer_t *tp);
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u16 spp_timer_register_callback (void (*fp)(spp_timer_t *));
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#endif /* __SPP_TIMERS_H__ */
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