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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [runtime/] [yield.c] - Rev 848
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// 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 #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__) __builtin_ia32_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); }
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