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https://github.com/projectacrn/acrn-hypervisor.git
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6ffa1aa367
We will use timerfd and epoll mechanism to emulate kinds of timers like PIT/RTC/WDT/PMTIMER/... in device model under Linux. The api is unified in this patch. Compare with sigevent mechanism, timerfd has a advantage that it could avoid race condition on resource accessing in the async sigev thread. change log: v1 -> v2: add NULL pointer check for function parameter; v2 -> v3: rename file name of vtimer.* to timer.*; rename structure name of vtimer to acrn_timer; add read() in timer handler to consume I/O event; v3 -> v4: replace bool clock_realtime with int clockid; close acrn_timer->fd properly; Tracked-On: #1489 Signed-off-by: Victor Sun <victor.sun@intel.com> Reviewed-by: Jian Jun Chen <jian.jun.chen@intel.com> Acked-by: Yin Fengwei <fengwei.yin@intel.com>
27 lines
580 B
C
27 lines
580 B
C
/*
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* Copyright (C) <2018> Intel Corporation
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef _TIMER_H_
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#define _TIMER_H_
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struct acrn_timer {
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int32_t fd;
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int32_t clockid;
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struct mevent *mevp;
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void (*callback)(void *);
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void *callback_param;
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};
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int32_t
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acrn_timer_init(struct acrn_timer *timer, void (*cb)(void *), void *param);
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void
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acrn_timer_deinit(struct acrn_timer *timer);
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int32_t
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acrn_timer_settime(struct acrn_timer *timer, struct itimerspec *new_value);
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int32_t
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acrn_timer_gettime(struct acrn_timer *timer, struct itimerspec *cur_value);
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#endif /* _VTIMER_ */
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