80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
|
#ifndef GS_UTIL_FUNCTION_SCHEDULER
|
||
|
|
#define GS_UTIL_FUNCTION_SCHEDULER
|
||
|
|
/* Copyright (c) 2013-2017 GomSpace A/S. All rights reserved. */
|
||
|
|
/**
|
||
|
|
@file
|
||
|
|
|
||
|
|
Function scheduler.
|
||
|
|
|
||
|
|
Simple framework for invoking functions at intervals.
|
||
|
|
|
||
|
|
Instead of creating a lot of tasks (which uses memory), this framework can be used to schedule execution of functions at specified intervals.
|
||
|
|
|
||
|
|
Once setup, calling gs_function_scheduler_execute_ms() will execute all functions timed out and return the time, until the next function has
|
||
|
|
to be executed or max timeout specified (or max wait time supported on the platform).
|
||
|
|
|
||
|
|
The API supports multiple schedulers, but is not thread-safe.
|
||
|
|
|
||
|
|
@note Do NOT use for time critical control, as the actual time interval is influenced by the host thread and other scheduled functions.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <gs/util/error.h>
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/**
|
||
|
|
Scheduler handle.
|
||
|
|
*/
|
||
|
|
typedef struct gs_function_scheduler gs_function_scheduler_t;
|
||
|
|
|
||
|
|
/**
|
||
|
|
Function callback.
|
||
|
|
|
||
|
|
@return timeout in mS until next callback.
|
||
|
|
*/
|
||
|
|
typedef uint32_t (*gs_function_scheduler_function_t)(void * user_data);
|
||
|
|
|
||
|
|
/**
|
||
|
|
Initialize scheduler.
|
||
|
|
Memory is allocated once for \a max_entries.
|
||
|
|
@param[in] max_timeout_ms max timeout in mS.
|
||
|
|
@param[in] max_entries max number of entries for this scheduler.
|
||
|
|
@param[out] scheduler reference to created scheduler.
|
||
|
|
@return_gs_error_t
|
||
|
|
*/
|
||
|
|
gs_error_t gs_function_scheduler_create(uint32_t max_timeout_ms, unsigned int max_entries, gs_function_scheduler_t ** scheduler);
|
||
|
|
|
||
|
|
/**
|
||
|
|
Free scheduler (release resources).
|
||
|
|
@param[in] scheduler scheduler.
|
||
|
|
@return_gs_error_t
|
||
|
|
*/
|
||
|
|
gs_error_t gs_function_scheduler_destroy(gs_function_scheduler_t * scheduler);
|
||
|
|
|
||
|
|
/**
|
||
|
|
Execute scheduled function(s) and returns number of mS until next execute must be called again.
|
||
|
|
|
||
|
|
@note Return type is \a int to prevent overflow on platforms where int is less than 32 bits.
|
||
|
|
|
||
|
|
@param[in] scheduler scheduler.
|
||
|
|
@return next timeout in mS.
|
||
|
|
*/
|
||
|
|
int gs_function_scheduler_execute_ms(gs_function_scheduler_t * scheduler);
|
||
|
|
|
||
|
|
/**
|
||
|
|
Register function to be executed at mS intervals.
|
||
|
|
@param[in] scheduler scheduler.
|
||
|
|
@param[in] first_timeout_ms mS until first execution.
|
||
|
|
@param[in] func function to execute.
|
||
|
|
@param[in] user_data function user data.
|
||
|
|
@return_gs_error_t
|
||
|
|
*/
|
||
|
|
gs_error_t gs_function_scheduler_register_ms(gs_function_scheduler_t * scheduler, uint32_t first_timeout_ms, gs_function_scheduler_function_t func, void * user_data);
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
#endif
|