Create SkGlyphCache globals with SkOnce.

src/core/SkGlyphCache.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkGlyphCache.h"
 #include "SkGlyphCache_Globals.h"
 #include "SkDistanceFieldGen.h"
 #include "SkGraphics.h"
 #include "SkPaint.h"
 #include "SkPath.h"
 #include "SkTemplates.h"
 #include "SkTLS.h"
 #include "SkTypeface.h"
 
 //#define SPEW_PURGE_STATUS
 //#define RECORD_HASH_EFFICIENCY
 
 bool gSkSuppressFontCachePurgeSpew;
 
+static void create_globals(SkGlyphCache_Globals** globals) {
+    *globals = SkNEW_ARGS(SkGlyphCache_Globals, (SkGlyphCache_Globals::kYes_UseMutex));
+}
+
 // Returns the shared globals
 static SkGlyphCache_Globals& getSharedGlobals() {
     // we leak this, so we don't incur any shutdown cost of the destructor
-    static SkGlyphCache_Globals* gGlobals = SkNEW_ARGS(SkGlyphCache_Globals,
-                                                       (SkGlyphCache_Globals::kYes_UseMutex));
+    static SkGlyphCache_Globals* gGlobals = NULL;
+    SK_DECLARE_STATIC_ONCE(once);
+    SkOnce(&once, create_globals, &gGlobals);
+    SkASSERT(NULL != gGlobals);
     return *gGlobals;
 }
 
 // Returns the TLS globals (if set), or the shared globals
 static SkGlyphCache_Globals& getGlobals() {
     SkGlyphCache_Globals* tls = SkGlyphCache_Globals::FindTLS();
     return tls ? *tls : getSharedGlobals();
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 712 matching lines @@
     return tls ? tls->getCacheSizeLimit() : 0;
 }
 
 void SkGraphics::SetTLSFontCacheLimit(size_t bytes) {
     if (0 == bytes) {
         SkGlyphCache_Globals::DeleteTLS();
     } else {
         SkGlyphCache_Globals::GetTLS().setCacheSizeLimit(bytes);
     }
 }