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-rw-r--r--src/chvt.c116
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diff --git a/src/chvt.c b/src/chvt.c
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-/*
- ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
-
- This file is part of ChibiOS/RT.
-
- ChibiOS/RT 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.
-
- ChibiOS/RT 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/>.
-*/
-
-/**
- * @file chvt.c
- * @brief Time and Virtual Timers related code.
- * @addtogroup Time
- * @{
- */
-
-#include <ch.h>
-
-VTList vtlist;
-
-/**
- * @brief Virtual Timers initialization.
- *
- * @note Internal use only.
- */
-void vt_init(void) {
-
- vtlist.vt_next = vtlist.vt_prev = (void *)&vtlist;
- vtlist.vt_time = (systime_t)-1;
- vtlist.vt_systime = 0;
-}
-
-/**
- * @brief Enables a virtual timer.
- *
- * @param[out] vtp the @p VirtualTimer structure pointer
- * @param[in] time the number of time ticks, the value @p TIME_INFINITE is not
- * allowed. The value @p TIME_IMMEDIATE is allowed but
- * interpreted as a normal time specification not as an
- * immediate timeout specification.
- * @param[in] vtfunc the timer callback function. After invoking the callback
- * the timer is disabled and the structure can be disposed or
- * reused.
- * @param[in] par a parameter that will be passed to the callback function
- * @note The associated function is invoked by an interrupt handler within
- * the I-Locked state, see @ref system_states.
- */
-void chVTSetI(VirtualTimer *vtp, systime_t time, vtfunc_t vtfunc, void *par) {
- VirtualTimer *p;
-
- chDbgCheck((vtp != NULL) && (vtfunc != NULL) && (time != TIME_INFINITE),
- "chVTSetI");
-
- vtp->vt_par = par;
- vtp->vt_func = vtfunc;
- p = vtlist.vt_next;
- while (p->vt_time < time) {
- time -= p->vt_time;
- p = p->vt_next;
- }
-
- vtp->vt_prev = (vtp->vt_next = p)->vt_prev;
- vtp->vt_prev->vt_next = p->vt_prev = vtp;
- vtp->vt_time = time;
- if (p != (void *)&vtlist)
- p->vt_time -= time;
-}
-
-/**
- * @brief Disables a Virtual Timer.
- *
- * @param[in] vtp the @p VirtualTimer structure pointer
- * @note The timer MUST be active when this function is invoked.
- */
-void chVTResetI(VirtualTimer *vtp) {
-
- chDbgCheck(vtp != NULL, "chVTResetI");
- chDbgAssert(vtp->vt_func != NULL,
- "chVTResetI(), #1",
- "timer not set or already triggered");
-
- if (vtp->vt_next != (void *)&vtlist)
- vtp->vt_next->vt_time += vtp->vt_time;
- vtp->vt_prev->vt_next = vtp->vt_next;
- vtp->vt_next->vt_prev = vtp->vt_prev;
- vtp->vt_func = NULL;
-}
-
-/**
- * @brief Checks if the current system time is within the specified time window.
- *
- * @param[in] start the start of the time window (inclusive)
- * @param[in] end the end of the time window (non inclusive)
- * @retval TRUE current time within the specified time window.
- * @retval FALSE current time not within the specified time window.
- * @note When start==end then the function returns always true because the
- * whole time range is specified.
- */
-bool_t chTimeIsWithin(systime_t start, systime_t end) {
-
- systime_t time = chTimeNow();
- return end > start ? (time >= start) && (time < end) :
- (time >= start) || (time < end);
-}
-
-/** @} */