mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-16 19:38:09 +00:00
98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
/*
|
|
* This file is part of the Trezor project, https://trezor.io/
|
|
*
|
|
* Copyright (c) SatoshiLabs
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef TREZORHAL_SYSTIMER_H
|
|
#define TREZORHAL_SYSTIMER_H
|
|
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
|
|
#ifdef KERNEL_MODE
|
|
|
|
// Initializes systimer subsystem
|
|
//
|
|
// Before calling this function, none of the other functions
|
|
// from this module should be called.
|
|
void systimer_init(void);
|
|
|
|
// Deinitialize sytimer subsystem
|
|
void systimer_deinit(void);
|
|
|
|
// Timer handle
|
|
typedef struct systimer systimer_t;
|
|
|
|
// Timer callback routine invoked when timer expires
|
|
//
|
|
// The callback should be as short as possible and should not
|
|
// block. It is invoked from the timer interrupt context.
|
|
//
|
|
// `context` is the pointer passed to `timer_create`
|
|
typedef void (*systimer_callback_t)(void* context);
|
|
|
|
// Initializes the timer and returns its handle.
|
|
//
|
|
// There a limited number of timers and `NULL` is returned
|
|
// if no timer is available.
|
|
systimer_t* systimer_create(systimer_callback_t callback, void* context);
|
|
|
|
// Deletes the timer
|
|
//
|
|
// Timer is unset and its resources are released.
|
|
void systimer_delete(systimer_t* timer);
|
|
|
|
// Sets the timer to expire in `delay_ms` milliseconds
|
|
//
|
|
// If the timer is already set, it will be rescheduled.
|
|
void systimer_set(systimer_t* timer, uint32_t delay_ms);
|
|
|
|
// Sets the timer to expire periodically every `period_ms` milliseconds
|
|
//
|
|
// If the timer is already set, it will be rescheduled.
|
|
void systimer_set_periodic(systimer_t* timer, uint32_t period_ms);
|
|
|
|
// Unsets the timer (cancels the expiration)
|
|
//
|
|
// Timer is not deleted and can be set again.
|
|
//
|
|
// Returns `true` if the timer was unset before its expiration
|
|
// so the callback will not be invoked.
|
|
bool systimer_unset(systimer_t* timer);
|
|
|
|
// Timer suspension state (opaque type).
|
|
// Allows to recursively suspend/resume timer.
|
|
typedef bool systimer_key_t;
|
|
|
|
// Suspends timer callback invocation
|
|
//
|
|
// The purpose of this function is to prevent the timer callback
|
|
// from being invoked for synchronization purposes. The function
|
|
// returns a lock that should be passed to `systimer_resume()` to
|
|
// resume the timer callback invocation.
|
|
systimer_key_t systimer_suspend(systimer_t* timer);
|
|
|
|
// Resumes timer callback invocation
|
|
//
|
|
// The timer callback invocation is resumed. The `key` should
|
|
// be the same as returned by `timer_suspend()`.
|
|
void systimer_resume(systimer_t* timer, systimer_key_t key);
|
|
|
|
#endif // KERNEL_MODE
|
|
|
|
#endif // TREZORHAL_SYSTIMER_H
|