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Diffstat (limited to 'ANDROID_3.4.5/arch/um/os-Linux/time.c')
-rw-r--r--ANDROID_3.4.5/arch/um/os-Linux/time.c186
1 files changed, 0 insertions, 186 deletions
diff --git a/ANDROID_3.4.5/arch/um/os-Linux/time.c b/ANDROID_3.4.5/arch/um/os-Linux/time.c
deleted file mode 100644
index 910499d7..00000000
--- a/ANDROID_3.4.5/arch/um/os-Linux/time.c
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * Copyright (C) 2000 - 2007 Jeff Dike (jdike{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <stddef.h>
-#include <errno.h>
-#include <signal.h>
-#include <time.h>
-#include <sys/time.h>
-#include "kern_util.h"
-#include "os.h"
-#include "internal.h"
-
-int set_interval(void)
-{
- int usec = UM_USEC_PER_SEC / UM_HZ;
- struct itimerval interval = ((struct itimerval) { { 0, usec },
- { 0, usec } });
-
- if (setitimer(ITIMER_VIRTUAL, &interval, NULL) == -1)
- return -errno;
-
- return 0;
-}
-
-int timer_one_shot(int ticks)
-{
- unsigned long usec = ticks * UM_USEC_PER_SEC / UM_HZ;
- unsigned long sec = usec / UM_USEC_PER_SEC;
- struct itimerval interval;
-
- usec %= UM_USEC_PER_SEC;
- interval = ((struct itimerval) { { 0, 0 }, { sec, usec } });
-
- if (setitimer(ITIMER_VIRTUAL, &interval, NULL) == -1)
- return -errno;
-
- return 0;
-}
-
-/**
- * timeval_to_ns - Convert timeval to nanoseconds
- * @ts: pointer to the timeval variable to be converted
- *
- * Returns the scalar nanosecond representation of the timeval
- * parameter.
- *
- * Ripped from linux/time.h because it's a kernel header, and thus
- * unusable from here.
- */
-static inline long long timeval_to_ns(const struct timeval *tv)
-{
- return ((long long) tv->tv_sec * UM_NSEC_PER_SEC) +
- tv->tv_usec * UM_NSEC_PER_USEC;
-}
-
-long long disable_timer(void)
-{
- struct itimerval time = ((struct itimerval) { { 0, 0 }, { 0, 0 } });
- long long remain, max = UM_NSEC_PER_SEC / UM_HZ;
-
- if (setitimer(ITIMER_VIRTUAL, &time, &time) < 0)
- printk(UM_KERN_ERR "disable_timer - setitimer failed, "
- "errno = %d\n", errno);
-
- remain = timeval_to_ns(&time.it_value);
- if (remain > max)
- remain = max;
-
- return remain;
-}
-
-long long os_nsecs(void)
-{
- struct timeval tv;
-
- gettimeofday(&tv, NULL);
- return timeval_to_ns(&tv);
-}
-
-#ifdef UML_CONFIG_NO_HZ
-static int after_sleep_interval(struct timespec *ts)
-{
- return 0;
-}
-
-static void deliver_alarm(void)
-{
- alarm_handler(SIGVTALRM, NULL);
-}
-
-static unsigned long long sleep_time(unsigned long long nsecs)
-{
- return nsecs;
-}
-
-#else
-unsigned long long last_tick;
-unsigned long long skew;
-
-static void deliver_alarm(void)
-{
- unsigned long long this_tick = os_nsecs();
- int one_tick = UM_NSEC_PER_SEC / UM_HZ;
-
- /* Protection against the host's time going backwards */
- if ((last_tick != 0) && (this_tick < last_tick))
- this_tick = last_tick;
-
- if (last_tick == 0)
- last_tick = this_tick - one_tick;
-
- skew += this_tick - last_tick;
-
- while (skew >= one_tick) {
- alarm_handler(SIGVTALRM, NULL);
- skew -= one_tick;
- }
-
- last_tick = this_tick;
-}
-
-static unsigned long long sleep_time(unsigned long long nsecs)
-{
- return nsecs > skew ? nsecs - skew : 0;
-}
-
-static inline long long timespec_to_us(const struct timespec *ts)
-{
- return ((long long) ts->tv_sec * UM_USEC_PER_SEC) +
- ts->tv_nsec / UM_NSEC_PER_USEC;
-}
-
-static int after_sleep_interval(struct timespec *ts)
-{
- int usec = UM_USEC_PER_SEC / UM_HZ;
- long long start_usecs = timespec_to_us(ts);
- struct timeval tv;
- struct itimerval interval;
-
- /*
- * It seems that rounding can increase the value returned from
- * setitimer to larger than the one passed in. Over time,
- * this will cause the remaining time to be greater than the
- * tick interval. If this happens, then just reduce the first
- * tick to the interval value.
- */
- if (start_usecs > usec)
- start_usecs = usec;
-
- start_usecs -= skew / UM_NSEC_PER_USEC;
- if (start_usecs < 0)
- start_usecs = 0;
-
- tv = ((struct timeval) { .tv_sec = start_usecs / UM_USEC_PER_SEC,
- .tv_usec = start_usecs % UM_USEC_PER_SEC });
- interval = ((struct itimerval) { { 0, usec }, tv });
-
- if (setitimer(ITIMER_VIRTUAL, &interval, NULL) == -1)
- return -errno;
-
- return 0;
-}
-#endif
-
-void idle_sleep(unsigned long long nsecs)
-{
- struct timespec ts;
-
- /*
- * nsecs can come in as zero, in which case, this starts a
- * busy loop. To prevent this, reset nsecs to the tick
- * interval if it is zero.
- */
- if (nsecs == 0)
- nsecs = UM_NSEC_PER_SEC / UM_HZ;
-
- nsecs = sleep_time(nsecs);
- ts = ((struct timespec) { .tv_sec = nsecs / UM_NSEC_PER_SEC,
- .tv_nsec = nsecs % UM_NSEC_PER_SEC });
-
- if (nanosleep(&ts, &ts) == 0)
- deliver_alarm();
- after_sleep_interval(&ts);
-}