pathops debug globals use atomic increment

src/pathops/SkOpSegment.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef SkOpSegment_DEFINE
 #define SkOpSegment_DEFINE
 
 #include "SkOpAngle.h"
 #include "SkOpSpan.h"
 #include "SkPathOpsBounds.h"
 #include "SkPathOpsCurve.h"
 #include "SkTArray.h"
 #include "SkTDArray.h"
 
+#if defined(SK_DEBUG) || !FORCE_RELEASE
+#include "SkThread.h"
+#endif
+
 class SkPathWriter;
 
 class SkOpSegment {
 public:
     SkOpSegment() {
 #if defined(SK_DEBUG) || !FORCE_RELEASE
-        fID = ++SkPathOpsDebug::gSegmentID;
+        fID = sk_atomic_inc(&SkPathOpsDebug::gSegmentID);
 #endif
     }
 
     bool operator<(const SkOpSegment& rh) const {
         return fBounds.fTop < rh.fBounds.fTop;
     }
 
     // FIXME: add some template or macro to avoid casting
     SkOpAngle& angle(int index) {
         const SkOpAngle& cAngle = (const_cast<const SkOpSegment*>(this))->angle(index);
@@ skipping 485 matching lines @@
     bool fSmall;  // set if some span is small
     bool fTiny;  // set if some span is tiny
 #if defined(SK_DEBUG) || !FORCE_RELEASE
     int fID;
 #endif
 
     friend class PathOpsSegmentTester;
 };
 
 #endif