mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-17 04:07:23 +00:00
57 lines
935 B
C
57 lines
935 B
C
// Copyright 2011 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
#include "config.h"
|
|
|
|
#include <stddef.h>
|
|
#include <sys/types.h>
|
|
#include <sys/time.h>
|
|
#include <sched.h>
|
|
#include <unistd.h>
|
|
|
|
#ifdef HAVE_SYS_SELECT_H
|
|
#include <sys/select.h>
|
|
#endif
|
|
|
|
#if defined (__i386__) || defined (__x86_64__)
|
|
#include <xmmintrin.h>
|
|
#endif
|
|
|
|
#include "runtime.h"
|
|
|
|
/* Spin wait. */
|
|
|
|
void
|
|
runtime_procyield (uint32 cnt)
|
|
{
|
|
volatile uint32 i;
|
|
|
|
for (i = 0; i < cnt; ++i)
|
|
{
|
|
#if defined (__i386__) || defined (__x86_64__)
|
|
_mm_pause ();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* Ask the OS to reschedule this thread. */
|
|
|
|
void
|
|
runtime_osyield (void)
|
|
{
|
|
sched_yield ();
|
|
}
|
|
|
|
/* Sleep for some number of microseconds. */
|
|
|
|
void
|
|
runtime_usleep (uint32 us)
|
|
{
|
|
struct timeval tv;
|
|
|
|
tv.tv_sec = us / 1000000;
|
|
tv.tv_usec = us % 1000000;
|
|
select (0, NULL, NULL, NULL, &tv);
|
|
}
|