a2f018bf38
set_interval took a timer type as an argument, but it always specified a virtual timer. So, it is not needed, and it is gone, and set_interval is simplified appropriately. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
91 lines
2 KiB
C
91 lines
2 KiB
C
/*
|
|
* 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_constants.h"
|
|
#include "os.h"
|
|
#include "user.h"
|
|
|
|
static int is_real_timer = 0;
|
|
|
|
int set_interval(void)
|
|
{
|
|
int usec = 1000000/UM_HZ;
|
|
struct itimerval interval = ((struct itimerval) { { 0, usec },
|
|
{ 0, usec } });
|
|
|
|
if (setitimer(ITIMER_VIRTUAL, &interval, NULL) == -1)
|
|
return -errno;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void disable_timer(void)
|
|
{
|
|
struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
|
|
|
|
if ((setitimer(ITIMER_VIRTUAL, &disable, NULL) < 0) ||
|
|
(setitimer(ITIMER_REAL, &disable, NULL) < 0))
|
|
printk(UM_KERN_ERR "disable_timer - setitimer failed, "
|
|
"errno = %d\n", errno);
|
|
|
|
/* If there are signals already queued, after unblocking ignore them */
|
|
signal(SIGALRM, SIG_IGN);
|
|
signal(SIGVTALRM, SIG_IGN);
|
|
}
|
|
|
|
int switch_timers(int to_real)
|
|
{
|
|
struct itimerval disable = ((struct itimerval) { { 0, 0 }, { 0, 0 }});
|
|
struct itimerval enable;
|
|
int old, new, old_type = is_real_timer;
|
|
|
|
if(to_real == old_type)
|
|
return to_real;
|
|
|
|
if (to_real) {
|
|
old = ITIMER_VIRTUAL;
|
|
new = ITIMER_REAL;
|
|
}
|
|
else {
|
|
old = ITIMER_REAL;
|
|
new = ITIMER_VIRTUAL;
|
|
}
|
|
|
|
if (setitimer(old, &disable, &enable) < 0)
|
|
printk(UM_KERN_ERR "switch_timers - setitimer disable failed, "
|
|
"errno = %d\n", errno);
|
|
|
|
if((enable.it_value.tv_sec == 0) && (enable.it_value.tv_usec == 0))
|
|
enable.it_value = enable.it_interval;
|
|
|
|
if (setitimer(new, &enable, NULL))
|
|
printk(UM_KERN_ERR "switch_timers - setitimer enable failed, "
|
|
"errno = %d\n", errno);
|
|
|
|
is_real_timer = to_real;
|
|
return old_type;
|
|
}
|
|
|
|
unsigned long long os_nsecs(void)
|
|
{
|
|
struct timeval tv;
|
|
|
|
gettimeofday(&tv, NULL);
|
|
return (unsigned long long) tv.tv_sec * BILLION + tv.tv_usec * 1000;
|
|
}
|
|
|
|
void idle_sleep(int secs)
|
|
{
|
|
struct timespec ts;
|
|
|
|
ts.tv_sec = secs;
|
|
ts.tv_nsec = 0;
|
|
nanosleep(&ts, NULL);
|
|
}
|