blob: 693e92be903809dd3b5253e96cb8c106167cdaba [file] [log] [blame]
// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// WARNING: THIS FILE IS MACHINE GENERATED. DO NOT EDIT.
// Generated from the banjo.examples.libraryb banjo file
#pragma once
#include <banjo/examples/librarya.h>
#include <banjo/examples/libraryb.h>
#include <ddk/driver.h>
#include <ddktl/device-internal.h>
#include <zircon/assert.h>
#include <zircon/compiler.h>
#include <zircon/types.h>
#include "libraryb-internal.h"
// DDK libraryb-protocol support
//
// :: Proxies ::
//
// ddk::ViewProtocolClient is a simple wrapper around
// view_protocol_t. It does not own the pointers passed to it.
//
// :: Mixins ::
//
// ddk::ViewProtocol is a mixin class that simplifies writing DDK drivers
// that implement the view protocol. It doesn't set the base protocol.
//
// :: Examples ::
//
// // A driver that implements a ZX_PROTOCOL_VIEW device.
// class ViewDevice;
// using ViewDeviceType = ddk::Device<ViewDevice, /* ddk mixins */>;
//
// class ViewDevice : public ViewDeviceType,
// public ddk::ViewProtocol<ViewDevice> {
// public:
// ViewDevice(zx_device_t* parent)
// : ViewDeviceType(parent) {}
//
// void ViewMoveTo(const point_t* p);
//
// ...
// };
namespace ddk {
template <typename D, typename Base = internal::base_mixin>
class ViewProtocol : public Base {
public:
ViewProtocol() {
internal::CheckViewProtocolSubclass<D>();
view_protocol_ops_.move_to = ViewMoveTo;
if constexpr (internal::is_base_proto<Base>::value) {
auto dev = static_cast<D*>(this);
// Can only inherit from one base_protocol implementation.
ZX_ASSERT(dev->ddk_proto_id_ == 0);
dev->ddk_proto_id_ = ZX_PROTOCOL_VIEW;
dev->ddk_proto_ops_ = &view_protocol_ops_;
}
}
protected:
view_protocol_ops_t view_protocol_ops_ = {};
private:
static void ViewMoveTo(void* ctx, const point_t* p) {
static_cast<D*>(ctx)->ViewMoveTo(p);
}
};
class ViewProtocolClient {
public:
ViewProtocolClient()
: ops_(nullptr), ctx_(nullptr) {}
ViewProtocolClient(const view_protocol_t* proto)
: ops_(proto->ops), ctx_(proto->ctx) {}
ViewProtocolClient(zx_device_t* parent) {
view_protocol_t proto;
if (device_get_protocol(parent, ZX_PROTOCOL_VIEW, &proto) == ZX_OK) {
ops_ = proto.ops;
ctx_ = proto.ctx;
} else {
ops_ = nullptr;
ctx_ = nullptr;
}
}
void GetProto(view_protocol_t* proto) const {
proto->ctx = ctx_;
proto->ops = ops_;
}
bool is_valid() const {
return ops_ != nullptr;
}
void clear() {
ctx_ = nullptr;
ops_ = nullptr;
}
void MoveTo(const point_t* p) const {
ops_->move_to(ctx_, p);
}
private:
view_protocol_ops_t* ops_;
void* ctx_;
};
} // namespace ddk