rte_timer.h

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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */

#ifndef _RTE_TIMER_H_
#define _RTE_TIMER_H_

#include <stdio.h>
#include <stdint.h>
#include <stddef.h>
#include <rte_common.h>
#include <rte_config.h>
#include <rte_spinlock.h>

#ifdef __cplusplus
extern "C" {
#endif

#define RTE_TIMER_STOP    0 
#define RTE_TIMER_PENDING 1 
#define RTE_TIMER_RUNNING 2 
#define RTE_TIMER_CONFIG  3 
#define RTE_TIMER_NO_OWNER -2 
enum rte_timer_type {
    SINGLE,
    PERIODICAL
};

union rte_timer_status {
    RTE_STD_C11
    struct {
        uint16_t state;  
        int16_t owner;   
    };
    uint32_t u32;            
};

#ifdef RTE_LIBRTE_TIMER_DEBUG

struct rte_timer_debug_stats {
    uint64_t reset;   
    uint64_t stop;    
    uint64_t manage;  
    uint64_t pending; 
};
#endif

struct rte_timer;

typedef void (*rte_timer_cb_t)(struct rte_timer *, void *);

#define MAX_SKIPLIST_DEPTH 10

struct rte_timer
{
    uint64_t expire;       
    struct rte_timer *sl_next[MAX_SKIPLIST_DEPTH];
    volatile union rte_timer_status status; 
    uint64_t period;       
    rte_timer_cb_t f;      
    void *arg;             
};


#ifdef __cplusplus

#define RTE_TIMER_INITIALIZER {             \
    0,                                      \
    {NULL},                                 \
    {{RTE_TIMER_STOP, RTE_TIMER_NO_OWNER}}, \
    0,                                      \
    NULL,                                   \
    NULL,                                   \
    }
#else

#define RTE_TIMER_INITIALIZER {                      \
        .status = {{                         \
            .state = RTE_TIMER_STOP,     \
            .owner = RTE_TIMER_NO_OWNER, \
        }},                                  \
    }
#endif

int rte_timer_data_alloc(uint32_t *id_ptr);

int rte_timer_data_dealloc(uint32_t id);

int rte_timer_subsystem_init(void);

void rte_timer_subsystem_finalize(void);

void rte_timer_init(struct rte_timer *tim);

int rte_timer_reset(struct rte_timer *tim, uint64_t ticks,
            enum rte_timer_type type, unsigned tim_lcore,
            rte_timer_cb_t fct, void *arg);

void
rte_timer_reset_sync(struct rte_timer *tim, uint64_t ticks,
             enum rte_timer_type type, unsigned tim_lcore,
             rte_timer_cb_t fct, void *arg);

int rte_timer_stop(struct rte_timer *tim);

void rte_timer_stop_sync(struct rte_timer *tim);

int rte_timer_pending(struct rte_timer *tim);

__rte_experimental
int64_t rte_timer_next_ticks(void);

int rte_timer_manage(void);

int rte_timer_dump_stats(FILE *f);

int
rte_timer_alt_reset(uint32_t timer_data_id, struct rte_timer *tim,
            uint64_t ticks, enum rte_timer_type type,
            unsigned int tim_lcore, rte_timer_cb_t fct, void *arg);

int
rte_timer_alt_stop(uint32_t timer_data_id, struct rte_timer *tim);

typedef void (*rte_timer_alt_manage_cb_t)(struct rte_timer *tim);

int
rte_timer_alt_manage(uint32_t timer_data_id, unsigned int *poll_lcores,
             int n_poll_lcores, rte_timer_alt_manage_cb_t f);

typedef void (*rte_timer_stop_all_cb_t)(struct rte_timer *tim, void *arg);

int
rte_timer_stop_all(uint32_t timer_data_id, unsigned int *walk_lcores,
           int nb_walk_lcores, rte_timer_stop_all_cb_t f, void *f_arg);

int
rte_timer_alt_dump_stats(uint32_t timer_data_id, FILE *f);

#ifdef __cplusplus
}
#endif

#endif /* _RTE_TIMER_H_ */