Add ScopedAssertNoThreadSuspension

Added a new class, ScopedAssertNoThreadSuspension.
Deleted some unnecessary ScopedAssertNoThreadSuspension since
VisitObjects already has a ScopedAssertNoThreadSuspension.

Change-Id: I29ec0006120c39a27184d30e2d1d0c179e203776

1 files changed, 17 insertions, 0 deletions

diff --git a/runtime/thread.h b/runtime/thread.h
index d96b50ba13..164eb86f67 100644
--- a/runtime/thread.h
+++ b/runtime/thread.h
@@ -1180,6 +1180,23 @@ class Thread {
   DISALLOW_COPY_AND_ASSIGN(Thread);
 };
 
+class ScopedAssertNoThreadSuspension {
+ public:
+  ScopedAssertNoThreadSuspension(Thread* self, const char* cause)
+      : self_(self), old_cause_(self->StartAssertNoThreadSuspension(cause)) {
+  }
+  ~ScopedAssertNoThreadSuspension() {
+    self_->EndAssertNoThreadSuspension(old_cause_);
+  }
+  Thread* Self() {
+    return self_;
+  }
+
+ private:
+  Thread* const self_;
+  const char* old_cause_;
+};
+
 std::ostream& operator<<(std::ostream& os, const Thread& thread);
 std::ostream& operator<<(std::ostream& os, const ThreadState& state);