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src/hotspot/share/runtime/os.cpp
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@@ -1835,11 +1835,23 @@
}
return result;
}
#endif
-int os::sleep(Thread* thread, jlong millis, bool interruptible) {
+// Convenience wrapper around naked_short_sleep to allow for longer sleep
+// times. Only for use by non-JavaThreads.
+void os::naked_sleep(jlong millis) {
+ assert(!Thread::current()->is_Java_thread(), "not for use by JavaThreads");
+ const jlong limit = 999;
+ while (millis > limit) {
+ naked_short_sleep(limit);
+ millis -= limit;
+ }
+ naked_short_sleep(millis);
+}
+
+int os::sleep(JavaThread* thread, jlong millis) {
assert(thread == Thread::current(), "thread consistency check");
ParkEvent * const slp = thread->_SleepEvent;
// Because there can be races with thread interruption sending an unpark()
// to the event, we explicitly reset it here to avoid an immediate return.
@@ -1848,16 +1860,12 @@
// Thread interruption establishes a happens-before ordering in the
// Java Memory Model, so we need to ensure we synchronize with the
// interrupt state.
OrderAccess::fence();
- if (interruptible) {
jlong prevtime = javaTimeNanos();
- assert(thread->is_Java_thread(), "sanity check");
- JavaThread *jt = (JavaThread *) thread;
-
for (;;) {
// interruption has precedence over timing out
if (os::is_interrupted(thread, true)) {
return OS_INTRPT;
}
@@ -1866,11 +1874,11 @@
if (newtime - prevtime < 0) {
// time moving backwards, should only happen if no monotonic clock
// not a guarantee() because JVM should not abort on kernel/glibc bugs
assert(!os::supports_monotonic_clock(),
- "unexpected time moving backwards detected in os::sleep(interruptible)");
+ "unexpected time moving backwards detected in os::sleep()");
} else {
millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC;
}
if (millis <= 0) {
@@ -1878,44 +1886,19 @@
}
prevtime = newtime;
{
- ThreadBlockInVM tbivm(jt);
- OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */);
+ ThreadBlockInVM tbivm(thread);
+ OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
- jt->set_suspend_equivalent();
+ thread->set_suspend_equivalent();
// cleared by handle_special_suspend_equivalent_condition() or
// java_suspend_self() via check_and_wait_while_suspended()
slp->park(millis);
// were we externally suspended while we were waiting?
- jt->check_and_wait_while_suspended();
- }
- }
- } else {
- OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */);
- jlong prevtime = javaTimeNanos();
-
- for (;;) {
- // It'd be nice to avoid the back-to-back javaTimeNanos() calls on
- // the 1st iteration ...
- jlong newtime = javaTimeNanos();
-
- if (newtime - prevtime < 0) {
- // time moving backwards, should only happen if no monotonic clock
- // not a guarantee() because JVM should not abort on kernel/glibc bugs
- assert(!os::supports_monotonic_clock(),
- "unexpected time moving backwards detected on os::sleep(!interruptible)");
- } else {
- millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC;
- }
-
- if (millis <= 0) break ;
-
- prevtime = newtime;
- slp->park(millis);
+ thread->check_and_wait_while_suspended();
}
- return OS_OK ;
}
}
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