unicorn/qemu/qemu-timer.c
Cao jin cc45b82472
timer/cpus: fix some typos and update some comments
Backports commit 3224e8786fcbe531746f1530c37210c425625213 from qemu
2018-02-25 23:21:57 -05:00

105 lines
2.8 KiB
C

/*
* QEMU System Emulator
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/* Modified for Unicorn Engine by Nguyen Anh Quynh, 2015 */
#include "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "hw/hw.h"
#include "qemu/timer.h"
#ifdef CONFIG_PPOLL
#include <poll.h>
#endif
#ifdef CONFIG_PRCTL_PR_SET_TIMERSLACK
#include <sys/prctl.h>
#endif
#include "uc_priv.h"
/***********************************************************/
/* timers */
typedef struct QEMUClock {
/* We rely on BQL to protect the timerlists */
QLIST_HEAD(, QEMUTimerList) timerlists;
int64_t last;
QEMUClockType type;
bool enabled;
} QEMUClock;
static QEMUClock qemu_clocks[QEMU_CLOCK_MAX];
/**
* qemu_clock_ptr:
* @type: type of clock
*
* Translate a clock type into a pointer to QEMUClock object.
*
* Returns: a pointer to the QEMUClock object
*/
static inline QEMUClock *qemu_clock_ptr(QEMUClockType type)
{
return &qemu_clocks[type];
}
/* return the host CPU cycle counter and handle stop/restart */
int64_t cpu_get_ticks(void)
{
return cpu_get_real_ticks();
}
/* return the host CPU monotonic time */
int64_t cpu_get_clock(void)
{
return get_clock();
}
int64_t qemu_clock_get_ns(QEMUClockType type)
{
int64_t now, last;
QEMUClock *clock = qemu_clock_ptr(type);
switch (type) {
case QEMU_CLOCK_REALTIME:
return get_clock();
default:
case QEMU_CLOCK_VIRTUAL:
return cpu_get_clock();
case QEMU_CLOCK_HOST:
now = get_clock_realtime();
last = clock->last;
clock->last = now;
if (now < last) {
// notifier_list_notify(&clock->reset_notifiers, &now); // FIXME
}
return now;
}
}