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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "webkit/glue/plugins/pepper_plugin_module.h"
#include <set>
#include "base/logging.h"
#include "base/scoped_ptr.h"
#include "third_party/ppapi/c/ppb_core.h"
#include "third_party/ppapi/c/ppb_device_context_2d.h"
#include "third_party/ppapi/c/ppb_image_data.h"
#include "third_party/ppapi/c/ppb_instance.h"
#include "third_party/ppapi/c/ppb_var.h"
#include "third_party/ppapi/c/ppp.h"
#include "third_party/ppapi/c/ppp_instance.h"
#include "third_party/ppapi/c/pp_module.h"
#include "third_party/ppapi/c/pp_resource.h"
#include "third_party/ppapi/c/pp_var.h"
#include "webkit/glue/plugins/pepper_device_context_2d.h"
#include "webkit/glue/plugins/pepper_image_data.h"
#include "webkit/glue/plugins/pepper_plugin_instance.h"
#include "webkit/glue/plugins/pepper_resource_tracker.h"
#include "webkit/glue/plugins/pepper_var.h"
typedef bool (*PPP_InitializeModuleFunc)(PP_Module, PPB_GetInterface);
typedef void (*PPP_ShutdownModuleFunc)();
namespace pepper {
namespace {
// Maintains all currently loaded plugin libs for validating PP_Module
// identifiers.
typedef std::set<PluginModule*> PluginModuleSet;
PluginModuleSet* GetLivePluginSet() {
static PluginModuleSet live_plugin_libs;
return &live_plugin_libs;
}
// PPB_Core --------------------------------------------------------------------
void AddRefResource(PP_Resource resource) {
Resource* res = ResourceTracker::Get()->GetResource(resource);
if (!res) {
DLOG(WARNING) << "AddRef()ing a nonexistent resource";
return;
}
res->AddRef();
}
void ReleaseResource(PP_Resource resource) {
Resource* res = ResourceTracker::Get()->GetResource(resource);
if (!res) {
DLOG(WARNING) << "Release()ing a nonexistent resource";
return;
}
res->Release();
}
const PPB_Core core_interface = {
&AddRefResource,
&ReleaseResource,
};
// GetInterface ----------------------------------------------------------------
const void* GetInterface(const char* name) {
if (strcmp(name, PPB_CORE_INTERFACE) == 0)
return &core_interface;
if (strcmp(name, PPB_VAR_INTERFACE) == 0)
return GetVarInterface();
if (strcmp(name, PPB_INSTANCE_INTERFACE) == 0)
return PluginInstance::GetInterface();
if (strcmp(name, PPB_IMAGEDATA_INTERFACE) == 0)
return ImageData::GetInterface();
if (strcmp(name, PPB_DEVICECONTEXT2D_INTERFACE) == 0)
return DeviceContext2D::GetInterface();
return NULL;
}
} // namespace
PluginModule::PluginModule(const FilePath& filename)
: filename_(filename),
initialized_(false),
library_(0),
ppp_get_interface_(NULL) {
GetLivePluginSet()->insert(this);
}
PluginModule::~PluginModule() {
// When the module is being deleted, there should be no more instances still
// holding a reference to us.
DCHECK(instances_.empty());
GetLivePluginSet()->erase(this);
if (library_) {
PPP_ShutdownModuleFunc shutdown_module =
reinterpret_cast<PPP_ShutdownModuleFunc>(
base::GetFunctionPointerFromNativeLibrary(library_,
"PPP_ShutdownModule"));
if (shutdown_module)
shutdown_module();
base::UnloadNativeLibrary(library_);
}
}
// static
scoped_refptr<PluginModule> PluginModule::CreateModule(
const FilePath& filename) {
// FIXME(brettw) do uniquifying of the plugin here like the NPAPI one.
scoped_refptr<PluginModule> lib(new PluginModule(filename));
if (!lib->Load())
lib = NULL;
return lib;
}
// static
PluginModule* PluginModule::FromPPModule(PP_Module module) {
PluginModule* lib = reinterpret_cast<PluginModule*>(module);
if (GetLivePluginSet()->find(lib) == GetLivePluginSet()->end())
return NULL; // Invalid plugin.
return lib;
}
bool PluginModule::Load() {
if (initialized_)
return true;
initialized_ = true;
library_ = base::LoadNativeLibrary(filename_);
if (!library_)
return false;
// Save the GetInterface function pointer for later.
ppp_get_interface_ =
reinterpret_cast<PPP_GetInterfaceFunc>(
base::GetFunctionPointerFromNativeLibrary(library_,
"PPP_GetInterface"));
if (!ppp_get_interface_) {
LOG(WARNING) << "No PPP_GetInterface in plugin library";
return false;
}
// Call the plugin initialize function.
PPP_InitializeModuleFunc initialize_module =
reinterpret_cast<PPP_InitializeModuleFunc>(
base::GetFunctionPointerFromNativeLibrary(library_,
"PPP_InitializeModule"));
if (!initialize_module) {
LOG(WARNING) << "No PPP_InitializeModule in plugin library";
return false;
}
int retval = initialize_module(GetPPModule(), &GetInterface);
if (retval != 0) {
LOG(WARNING) << "PPP_InitializeModule returned failure " << retval;
return false;
}
return true;
}
PP_Module PluginModule::GetPPModule() const {
return reinterpret_cast<intptr_t>(this);
}
PluginInstance* PluginModule::CreateInstance(PluginDelegate* delegate) {
const PPP_Instance* plugin_instance_interface =
reinterpret_cast<const PPP_Instance*>(GetPluginInterface(
PPP_INSTANCE_INTERFACE));
if (!plugin_instance_interface) {
LOG(WARNING) << "Plugin doesn't support instance interface, failing.";
return NULL;
}
return new PluginInstance(delegate, this, plugin_instance_interface);
}
PluginInstance* PluginModule::GetSomeInstance() const {
// This will generally crash later if there is not actually any instance to
// return, so we force a crash now to make bugs easier to track down.
CHECK(!instances_.empty());
return *instances_.begin();
}
const void* PluginModule::GetPluginInterface(const char* name) const {
if (!ppp_get_interface_)
return NULL;
return ppp_get_interface_(name);
}
void PluginModule::InstanceCreated(PluginInstance* instance) {
instances_.insert(instance);
}
void PluginModule::InstanceDeleted(PluginInstance* instance) {
instances_.erase(instance);
}
} // namespace pepper
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