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// Copyright (c) 2012 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 "content/renderer/pepper/host_array_buffer_var.h"
#include <stdio.h>
#include <string.h>
#include <memory>
#include "base/logging.h"
#include "base/memory/shared_memory.h"
#include "base/process/process_handle.h"
#include "content/common/pepper_file_util.h"
#include "content/renderer/pepper/host_globals.h"
#include "content/renderer/pepper/plugin_module.h"
#include "content/renderer/pepper/renderer_ppapi_host_impl.h"
#include "content/renderer/render_thread_impl.h"
#include "ppapi/c/pp_instance.h"
using ppapi::ArrayBufferVar;
using blink::WebArrayBuffer;
namespace content {
HostArrayBufferVar::HostArrayBufferVar(uint32_t size_in_bytes)
: buffer_(WebArrayBuffer::Create(size_in_bytes, 1 /* element_size */)),
valid_(true) {}
HostArrayBufferVar::HostArrayBufferVar(const WebArrayBuffer& buffer)
: buffer_(buffer), valid_(true) {}
HostArrayBufferVar::HostArrayBufferVar(uint32_t size_in_bytes,
base::SharedMemoryHandle handle)
: buffer_(WebArrayBuffer::Create(size_in_bytes, 1 /* element_size */)) {
base::SharedMemory s(handle, true);
valid_ = s.Map(size_in_bytes);
if (valid_) {
memcpy(buffer_.Data(), s.memory(), size_in_bytes);
s.Unmap();
}
}
HostArrayBufferVar::~HostArrayBufferVar() {}
void* HostArrayBufferVar::Map() {
if (!valid_)
return nullptr;
return buffer_.Data();
}
void HostArrayBufferVar::Unmap() {
// We do not used shared memory on the host side. Nothing to do.
}
uint32_t HostArrayBufferVar::ByteLength() {
return buffer_.ByteLength();
}
bool HostArrayBufferVar::CopyToNewShmem(
PP_Instance instance,
int* host_shm_handle_id,
base::SharedMemoryHandle* plugin_shm_handle) {
std::unique_ptr<base::SharedMemory> shm(
RenderThread::Get()
->HostAllocateSharedMemoryBuffer(ByteLength())
.release());
if (!shm)
return false;
shm->Map(ByteLength());
memcpy(shm->memory(), Map(), ByteLength());
shm->Unmap();
// Duplicate the handle here; the SharedMemory destructor closes
// its handle on us.
HostGlobals* hg = HostGlobals::Get();
PluginModule* pm = hg->GetModule(hg->GetModuleForInstance(instance));
*plugin_shm_handle =
pm->renderer_ppapi_host()->ShareSharedMemoryHandleWithRemote(
shm->handle());
*host_shm_handle_id = -1;
return true;
}
} // namespace content
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