[macruby-changes] [1938] MacRuby/branches/experimental
source_changes at macosforge.org
source_changes at macosforge.org
Fri Jun 26 15:10:11 PDT 2009
Revision: 1938
http://trac.macosforge.org/projects/ruby/changeset/1938
Author: lsansonetti at apple.com
Date: 2009-06-26 15:10:11 -0700 (Fri, 26 Jun 2009)
Log Message:
-----------
fixed potential 'signal-before-wait' deadlocks
Modified Paths:
--------------
MacRuby/branches/experimental/thread.c
MacRuby/branches/experimental/vm.cpp
Modified: MacRuby/branches/experimental/thread.c
===================================================================
--- MacRuby/branches/experimental/thread.c 2009-06-26 19:13:14 UTC (rev 1937)
+++ MacRuby/branches/experimental/thread.c 2009-06-26 22:10:11 UTC (rev 1938)
@@ -83,8 +83,6 @@
rb_sys_fail("pthread_create() failed");
}
- //assert(pthread_detach(t->thread) == 0);
-
return thread;
}
Modified: MacRuby/branches/experimental/vm.cpp
===================================================================
--- MacRuby/branches/experimental/vm.cpp 2009-06-26 19:13:14 UTC (rev 1937)
+++ MacRuby/branches/experimental/vm.cpp 2009-06-26 22:10:11 UTC (rev 1938)
@@ -4538,15 +4538,23 @@
post_wait(t);
}
+static inline void
+signal_thread(rb_vm_thread_t *t)
+{
+ assert(pthread_mutex_lock(&t->sleep_mutex) == 0);
+ assert(pthread_cond_signal(&t->sleep_cond) == 0);
+ assert(pthread_mutex_unlock(&t->sleep_mutex) == 0);
+}
+
extern "C"
void
rb_vm_thread_wakeup(rb_vm_thread_t *t)
{
if (t->status == THREAD_DEAD) {
- rb_raise(rb_eThreadError, "can't wake up thread from the dead");
+ rb_raise(rb_eThreadError, "can't wake up thread from the death");
}
- if (t->status == THREAD_SLEEP) {
- assert(pthread_cond_signal(&t->sleep_cond) == 0);
+ if (t->status == THREAD_SLEEP && t->in_cond_wait) {
+ signal_thread(t);
}
}
@@ -4566,7 +4574,7 @@
// will autodestroy itself, to work around a stack unwinding bug
// in the Mac OS X pthread implementation that messes our C++
// exception handlers.
- assert(pthread_cond_signal(&t->sleep_cond) == 0);
+ signal_thread(t);
}
else {
assert(pthread_cancel(t->thread) == 0);
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