/platform/external/webkit/WebCore/bindings/v8/npruntime_priv.h
https://github.com/aharish/totoro-gb-opensource-update2 · C Header · 95 lines · 19 code · 13 blank · 63 comment · 0 complexity · 813d38d5a94cd76c3860fe560ff12db6 MD5 · raw file
- /*
- * Copyright (C) 2003, 2006 Apple Computer, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #ifndef npruntime_priv_h
- #define npruntime_priv_h
- #if PLATFORM(CHROMIUM)
- #include <bindings/npruntime.h>
- #else
- #include "npruntime.h"
- #endif
- #ifdef __cplusplus
- extern "C" {
- #endif
- /*
- _NPN_InitializeVariantWithStringCopy() will copy string data. The string data
- will be deallocated by calls to NPReleaseVariantValue().
- */
- void _NPN_InitializeVariantWithStringCopy(NPVariant*, const NPString*);
- void _NPN_DeallocateObject(NPObject*);
- // The following routines allow the browser to aggressively cleanup NPObjects
- // on a per plugin basis. All NPObjects used through the NPRuntime API should
- // be "registered" while they are alive. After an object has been
- // deleted, it is possible for Javascript to have a reference to that object
- // which has not yet been garbage collected. Javascript access to NPObjects
- // will reference this registry to determine if the object is accessible or
- // not.
- // Windows introduces an additional complication for objects created by the
- // plugin. Plugins load inside of a DLL. Each DLL has it's own heap. If
- // the browser unloads the plugin DLL, all objects created within the DLL's
- // heap instantly become invalid. Normally, when WebKit drops the reference
- // on the top-level plugin object, it tells the plugin manager that the
- // plugin can be destroyed, which can unload the DLL. So, we must eliminate
- // all pointers to any object ever created by the plugin.
- // We generally associate NPObjects with an owner. The owner of an NPObject
- // is an NPObject which, when destroyed, also destroys all objects it owns.
- // For example, if an NPAPI plugin creates 10 sub-NPObjects, all 11 objects
- // (the NPAPI plugin + its 10 sub-objects) should become inaccessible
- // simultaneously.
- // The ownership hierarchy is flat, and not a tree. Imagine the following
- // object creation:
- // PluginObject
- // |
- // +-- Creates -----> Object1
- // |
- // +-- Creates -----> Object2
- //
- // PluginObject will be the "owner" for both Object1 and Object2.
- // Register an NPObject with the runtime. If the owner is NULL, the
- // object is treated as an owning object. If owner is not NULL,
- // this object will be registered as owned by owner's top-level owner.
- void _NPN_RegisterObject(NPObject*, NPObject* owner);
- // Unregister an NPObject with the runtime. If obj is an owning
- // object, this call will also unregister all of the owned objects.
- void _NPN_UnregisterObject(NPObject*);
- // Check to see if an object is registered with the runtime.
- // Return true if registered, false otherwise.
- bool _NPN_IsAlive(NPObject*);
- #ifdef __cplusplus
- } /* end extern "C" */
- #endif
- #endif // npruntime_priv_h