file.h

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#pragma once
 
#include <kernel/fs/path.h>
#include <kernel/mem/paging_types.h>
#include <kernel/utils/ref.h>
 
#include <stdatomic.h>
#include <stdint.h>
#include <sys/io.h>
#include <sys/proc.h>
 
typedef struct wait_queue wait_queue_t;
 
typedef struct file file_t;
typedef struct file_ops file_ops_t;
typedef struct dentry dentry_t;
typedef struct inode inode_t;
typedef struct poll_file poll_file_t;
 
typedef struct file
{
    ref_t ref;
    uint64_t pos;
    path_flags_t flags;
    inode_t* inode;
    path_t path;
    const file_ops_t* ops;
    void* private;
} file_t;
 
typedef struct file_ops
{
    uint64_t (*open)(file_t* file);
    uint64_t (*open2)(file_t* files[2]);
    void (*close)(file_t* file);
    uint64_t (*read)(file_t* file, void* buffer, uint64_t count, uint64_t* offset);
    uint64_t (*write)(file_t* file, const void* buffer, uint64_t count, uint64_t* offset);
    uint64_t (*seek)(file_t* file, int64_t offset, seek_origin_t origin);
    uint64_t (*ioctl)(file_t* file, uint64_t request, void* argp, uint64_t size);
    wait_queue_t* (*poll)(file_t* file, poll_events_t* revents);
    void* (*mmap)(file_t* file, void* address, uint64_t length, uint64_t* offset, pml_flags_t flags);
} file_ops_t;
 
typedef struct poll_file
{
    file_t* file;
    poll_events_t events;
    poll_events_t revents;
} poll_file_t;
 
file_t* file_new(inode_t* inode, const path_t* path, path_flags_t flags);
 
uint64_t file_generic_seek(file_t* file, int64_t offset, seek_origin_t origin);