#ifndef FILE_STATS_H__
#define FILE_STATS_H__

#define FILE_STATS_ENABLED 1


enum FileIOImplentation { FI_LOWIO, FI_AIO, FI_BCACHE, FI_MAX_IDX };
enum FileOp { FO_READ, FO_WRITE };
enum CacheRet { CR_HIT, CR_MISS };


#if FILE_STATS_ENABLED

// vfs
extern void stats_vfs_file_add(size_t file_size);
extern void stats_vfs_file_remove(size_t file_size);
extern void stats_vfs_init_start();
extern void stats_vfs_init_finish();

// file
extern void stats_unique_name(size_t name_len);
extern void stats_open(const char* atom_fn, size_t file_size);
extern void stats_close();

// file_buf
extern void stats_buf_alloc(size_t user_size, size_t padded_size);
extern void stats_buf_free();
extern void stats_buf_ref();

// file_io
extern void stats_user_io(size_t user_size);
extern void stats_io_start(FileIOImplentation fi, FileOp fo,
	size_t actual_size, BlockId disk_pos, double* start_time_storage);
extern void stats_io_finish(FileIOImplentation fi, FileOp fo, double* start_time_storage);
extern void stats_cb_start();
extern void stats_cb_finish();

// file_cache
extern void stats_cache(CacheRet cr, size_t size, const char* atom_fn);
extern void stats_block_cache(CacheRet cr);

extern void stats_dump();

#else

#define stats_vfs_file_add(file_size)
#define stats_vfs_file_remove(file_size)
#define stats_vfs_init_start()
#define stats_vfs_init_finish()
#define stats_unique_name(name_len)
#define stats_open(atom_fn, file_size)
#define stats_close()
#define stats_buf_alloc(user_size, padded_size)
#define stats_buf_free()
#define stats_buf_ref()
#define stats_user_io(user_size)
#define stats_io_start(fi, fo, actual_size, disk_pos, start_time_storage)
#define stats_io_finish(fi, fo, start_time_storage)
#define stats_cb_start()
#define stats_cb_finish()
#define stats_cache(cr, size, atom_fn)
#define stats_block_cache(cr)
#define stats_dump()

#endif

#endif	// #ifndef FILE_STATS_H__