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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Copyright (c) 2016 Intel Corporation.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __tle_timer_h__
#define __tle_timer_h__
#include <stdint.h>
#include <rte_config.h>
#include <rte_debug.h>
#include <rte_malloc.h>
#ifdef __cplusplus
extern "C" {
#endif
/** @file
* @brief timer definitions
*
* Design parameters:
* granularity: configurable in terms of units (i.e. cycles or ms).
* e.g. with 100ms tick
* required max period: 2.5 hours => 150 minutes => 90,000 ticks
* Rounding up to 256k ticks yields a two-level 512 slot-per-level
* wheel, resulting in a 7-hour max period.
*/
struct tle_timer_wheel_args {
uint32_t tick_size; /** tick size in units */
int32_t socket_id; /**< socket ID to allocate memory for. */
uint32_t max_timer; /** maximum number of timers */
};
struct tle_timer_wheel;
/** initialize a timer wheel */
struct tle_timer_wheel *
tle_timer_create(struct tle_timer_wheel_args *prm, uint64_t now);
/** free a timer wheel */
void
tle_timer_free(struct tle_timer_wheel *tw);
/** start a timer */
void *
tle_timer_start(struct tle_timer_wheel *tw, void *obj, uint64_t interval);
/** stop a timer */
void
tle_timer_stop(struct tle_timer_wheel *tw, void *timer);
/** run the timer wheel. Call in every tick_size cycles
* (e.g. equivalent of 100ms).
*/
void
tle_timer_expire(struct tle_timer_wheel *tw, uint64_t now);
/** bulk retrieve of expired timers */
int
tle_timer_get_expired_bulk(struct tle_timer_wheel *tw, void *timers[],
uint32_t num);
#ifdef __cplusplus
}
#endif
#endif /* __tle_timer_h__ */
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