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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "config.h"
      6 #include "platform/ScriptForbiddenScope.h"
      7 
      8 #include "wtf/Assertions.h"
      9 #include "wtf/MainThread.h"
     10 
     11 namespace blink {
     12 
     13 static unsigned s_scriptForbiddenCount = 0;
     14 
     15 ScriptForbiddenScope::ScriptForbiddenScope()
     16 {
     17     ASSERT(isMainThread());
     18     ++s_scriptForbiddenCount;
     19 }
     20 
     21 ScriptForbiddenScope::~ScriptForbiddenScope()
     22 {
     23     ASSERT(isMainThread());
     24     ASSERT(s_scriptForbiddenCount);
     25     --s_scriptForbiddenCount;
     26 }
     27 
     28 void ScriptForbiddenScope::enter()
     29 {
     30     ASSERT(isMainThread());
     31     ++s_scriptForbiddenCount;
     32 }
     33 
     34 void ScriptForbiddenScope::exit()
     35 {
     36     ASSERT(isMainThread());
     37     ASSERT(s_scriptForbiddenCount);
     38     --s_scriptForbiddenCount;
     39 }
     40 
     41 bool ScriptForbiddenScope::isScriptForbidden()
     42 {
     43     return isMainThread() && s_scriptForbiddenCount;
     44 }
     45 
     46 ScriptForbiddenScope::AllowUserAgentScript::AllowUserAgentScript()
     47     : m_change(s_scriptForbiddenCount, 0)
     48 {
     49 }
     50 
     51 ScriptForbiddenScope::AllowUserAgentScript::~AllowUserAgentScript()
     52 {
     53     ASSERT(!s_scriptForbiddenCount);
     54 }
     55 
     56 ScriptForbiddenScope::AllowSuperUnsafeScript::AllowSuperUnsafeScript()
     57     : m_change(s_scriptForbiddenCount, 0)
     58 {
     59 }
     60 
     61 ScriptForbiddenScope::AllowSuperUnsafeScript::~AllowSuperUnsafeScript()
     62 {
     63     ASSERT(!s_scriptForbiddenCount);
     64 }
     65 
     66 } // namespace blink
     67