4c9e138513
Formatting changes in the files which have been changed in the tt-removal patchset so far. These include: copyright updates header file trimming style fixes adding severity to printks indenting Kconfig help according to the predominant kernel style These changes should be entirely non-functional. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
/*
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike{addtoit,linux.intel}.com)
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* Licensed under the GPL
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*/
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#include <stddef.h>
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#include <errno.h>
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#include <signal.h>
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#include <time.h>
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#include <sys/time.h>
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#include "kern_util.h"
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#include "kern_constants.h"
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#include "os.h"
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#include "user.h"
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int set_interval(int is_virtual)
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{
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int usec = 1000000/hz();
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int timer_type = is_virtual ? ITIMER_VIRTUAL : ITIMER_REAL;
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struct itimerval interval = ((struct itimerval) { { 0, usec },
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{ 0, usec } });
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if (setitimer(timer_type, &interval, NULL) == -1)
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return -errno;
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return 0;
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}
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void disable_timer(void)
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{
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struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
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if ((setitimer(ITIMER_VIRTUAL, &disable, NULL) < 0) ||
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(setitimer(ITIMER_REAL, &disable, NULL) < 0))
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printk(UM_KERN_ERR "disable_timer - setitimer failed, "
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"errno = %d\n", errno);
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/* If there are signals already queued, after unblocking ignore them */
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signal(SIGALRM, SIG_IGN);
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signal(SIGVTALRM, SIG_IGN);
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}
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void switch_timers(int to_real)
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{
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struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
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struct itimerval enable = ((struct itimerval) { { 0, 1000000/hz() },
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{ 0, 1000000/hz() }});
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int old, new;
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if (to_real) {
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old = ITIMER_VIRTUAL;
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new = ITIMER_REAL;
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}
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else {
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old = ITIMER_REAL;
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new = ITIMER_VIRTUAL;
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}
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if ((setitimer(old, &disable, NULL) < 0) ||
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(setitimer(new, &enable, NULL)))
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printk(UM_KERN_ERR "switch_timers - setitimer failed, "
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"errno = %d\n", errno);
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}
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unsigned long long os_nsecs(void)
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return (unsigned long long) tv.tv_sec * BILLION + tv.tv_usec * 1000;
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}
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void idle_sleep(int secs)
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{
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struct timespec ts;
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ts.tv_sec = secs;
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ts.tv_nsec = 0;
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nanosleep(&ts, NULL);
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}
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