aa06328516
* Furi: remove direct FreeRTOS timers use * Furi: eliminate FreeRTOS headers leak. What did it cost? Everything... * SubGhz: proper public api for protocols. Format Sources. * Furi: slightly less redundant declarations * Desktop: proper types in printf * Sync API Symbols * Furi: add timer reset and fix dolphin service, fix unit tests * Furi: proper timer restart method naming and correct behavior in timer stopped state. --------- Co-authored-by: hedger <hedger@nanode.su>
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/**
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* @file kernel.h
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* Furi Kernel primitives
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*/
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#pragma once
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#include <core/base.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Check if CPU is in IRQ or kernel running and IRQ is masked
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*
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* Originally this primitive was born as a workaround for FreeRTOS kernel primitives shenanigans with PRIMASK.
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*
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* Meaningful use cases are:
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*
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* - When kernel is started and you want to ensure that you are not in IRQ or IRQ is not masked(like in critical section)
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* - When kernel is not started and you want to make sure that you are not in IRQ mode, ignoring PRIMASK.
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*
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* As you can see there will be edge case when kernel is not started and PRIMASK is not 0 that may cause some funky behavior.
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* Most likely it will happen after kernel primitives being used, but control not yet passed to kernel.
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* It's up to you to figure out if it is safe for your code or not.
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*
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* @return true if CPU is in IRQ or kernel running and IRQ is masked
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*/
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bool furi_kernel_is_irq_or_masked();
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/** Check if kernel is running
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*
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* @return true if running, false otherwise
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*/
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bool furi_kernel_is_running();
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/** Lock kernel, pause process scheduling
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*
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* @warning This should never be called in interrupt request context.
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*
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* @return previous lock state(0 - unlocked, 1 - locked)
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*/
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int32_t furi_kernel_lock();
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/** Unlock kernel, resume process scheduling
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*
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* @warning This should never be called in interrupt request context.
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*
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* @return previous lock state(0 - unlocked, 1 - locked)
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*/
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int32_t furi_kernel_unlock();
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/** Restore kernel lock state
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*
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* @warning This should never be called in interrupt request context.
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*
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* @param[in] lock The lock state
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*
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* @return new lock state or error
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*/
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int32_t furi_kernel_restore_lock(int32_t lock);
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/** Get kernel systick frequency
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*
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* @return systick counts per second
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*/
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uint32_t furi_kernel_get_tick_frequency();
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/** Delay execution
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*
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* @warning This should never be called in interrupt request context.
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*
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* Also keep in mind delay is aliased to scheduler timer intervals.
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*
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* @param[in] ticks The ticks count to pause
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*/
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void furi_delay_tick(uint32_t ticks);
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/** Delay until tick
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*
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* @warning This should never be called in interrupt request context.
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*
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* @param[in] ticks The tick until which kerel should delay task execution
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*
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* @return The furi status.
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*/
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FuriStatus furi_delay_until_tick(uint32_t tick);
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/** Get current tick counter
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*
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* System uptime, may overflow.
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*
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* @return Current ticks in milliseconds
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*/
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uint32_t furi_get_tick(void);
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/** Convert milliseconds to ticks
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*
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* @param[in] milliseconds time in milliseconds
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* @return time in ticks
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*/
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uint32_t furi_ms_to_ticks(uint32_t milliseconds);
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/** Delay in milliseconds
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*
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* This method uses kernel ticks on the inside, which causes delay to be aliased to scheduler timer intervals.
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* Real wait time will be between X+ milliseconds.
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* Special value: 0, will cause task yield.
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* Also if used when kernel is not running will fall back to `furi_delay_us`.
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*
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* @warning Cannot be used from ISR
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*
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* @param[in] milliseconds milliseconds to wait
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*/
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void furi_delay_ms(uint32_t milliseconds);
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/** Delay in microseconds
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*
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* Implemented using Cortex DWT counter. Blocking and non aliased.
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*
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* @param[in] microseconds microseconds to wait
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*/
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void furi_delay_us(uint32_t microseconds);
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#ifdef __cplusplus
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}
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#endif
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