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var_array_buffer.cc
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88 lines (69 loc) · 2.05 KB
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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/cpp/var_array_buffer.h"
#include <limits>
#include "ppapi/c/ppb_var_array_buffer.h"
#include "ppapi/cpp/logging.h"
#include "ppapi/cpp/module_impl.h"
namespace pp {
namespace {
template <> const char* interface_name<PPB_VarArrayBuffer_1_0>() {
return PPB_VAR_ARRAY_BUFFER_INTERFACE_1_0;
}
} // namespace
VarArrayBuffer::VarArrayBuffer() {
ConstructWithSize(0);
}
VarArrayBuffer::VarArrayBuffer(const Var& var) : Var(var) {
if (!var.is_array_buffer()) {
PP_NOTREACHED();
var_ = PP_MakeNull();
}
}
VarArrayBuffer::VarArrayBuffer(uint32_t size_in_bytes) {
ConstructWithSize(size_in_bytes);
}
pp::VarArrayBuffer& VarArrayBuffer::operator=(const VarArrayBuffer& other) {
Var::operator=(other);
return *this;
}
pp::Var& VarArrayBuffer::operator=(const Var& other) {
if (other.is_array_buffer()) {
return Var::operator=(other);
} else {
PP_NOTREACHED();
return *this;
}
}
uint32_t VarArrayBuffer::ByteLength() const {
uint32_t byte_length = std::numeric_limits<uint32_t>::max();
if (is_array_buffer() && has_interface<PPB_VarArrayBuffer_1_0>())
get_interface<PPB_VarArrayBuffer_1_0>()->ByteLength(var_, &byte_length);
else
PP_NOTREACHED();
return byte_length;
}
void* VarArrayBuffer::Map() {
if (is_array_buffer() && has_interface<PPB_VarArrayBuffer_1_0>())
return get_interface<PPB_VarArrayBuffer_1_0>()->Map(var_);
PP_NOTREACHED();
return NULL;
}
void VarArrayBuffer::Unmap() {
if (is_array_buffer() && has_interface<PPB_VarArrayBuffer_1_0>())
get_interface<PPB_VarArrayBuffer_1_0>()->Unmap(var_);
else
PP_NOTREACHED();
}
void VarArrayBuffer::ConstructWithSize(uint32_t size_in_bytes) {
PP_DCHECK(is_undefined());
if (has_interface<PPB_VarArrayBuffer_1_0>()) {
var_ = get_interface<PPB_VarArrayBuffer_1_0>()->Create(size_in_bytes);
} else {
PP_NOTREACHED();
var_ = PP_MakeNull();
}
is_managed_ = true;
}
} // namespace pp