sys_interface.hpp

// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include <cstdint>
#include <sys/ioctl.h>
#include <unistd.h>

namespace google
{
namespace hoth
{
namespace internal
{

/** @class Sys
 *  @brief Overridable direct syscall interface
 *
 *  TODO: factor this out into a syscall class shared by all upstream projects
 */
class Sys
{
  public:
    virtual ~Sys() = default;

    virtual int open(const char* pathname, int flags) const = 0;
    virtual int close(int fd) const = 0;
    virtual off_t lseek(int fd, off_t offset, int whence) const = 0;
    virtual ssize_t read(int fd, void* buf, size_t count) const = 0;
    virtual ssize_t write(int fd, const void* buf, size_t count) const = 0;
    virtual int ioctl(int fd , uint64_t request, void* mtd) const = 0;
};

} // namespace internal

} // namespace hoth

} // namespace google