NANDSimpleSafeOpenAsync

C Specification


#include <revolution/nand.h>

#define NAND_ACCESS_READ       0x01
#define NAND_ACCESS_WRITE      0x02
#define NAND_ACCESS_RW         (NAND_ACCESS_READ | NAND_ACCESS_WRITE)

typedef void (*NANDCallback)( s32 result, NANDCommandBlock *block );

s32 NANDSimpleSafeOpenAsync(const char *path, NANDFileInfo *info, u8 accType, void *buf, u32 length, NANDCallback cb, NANDCommandBlock *block);

Arguments

path Name of the file to open.

info Pointer to a NANDFileInfo structure.

accType Access type. Specifies NAND_ACCESS_READ, NAND_ACCESS_WRITE, or NAND_ACCESS_RW.

buf Specifies the leading address of the buffer to be used when copying files. The buffer must be 32-byte aligned.

length Specifies the size of the buffer to use in file copying. The size must be a multiple of NAND_FSBLOCK_SIZE(16KB).

cb Callback function to call when this function completes processing.

block Command block structure to be passed to the callback function.

Return Values

When the request begins normally, returns NAND_RESULT_OK.

NAND_RESULT_OK NAND_RESULT_ACCESS NAND_RESULT_ALLOC_FAILED NAND_RESULT_AUTHENTICATION NAND_RESULT_BUSY NAND_RESULT_CORRUPT NAND_RESULT_ECC_CRIT NAND_RESULT_EXISTS NAND_RESULT_INVALID NAND_RESULT_MAXBLOCKS NAND_RESULT_MAXFD NAND_RESULT_MAXFILES NAND_RESULT_NOEXISTS NAND_RESULT_UNKNOWN NAND_RESULT_FATAL_ERROR

Description

Asynchronously opens a file in a manner that guarantees the atomic nature of file updates. The file opened using this function must be closed using NANDSimpleSafeClose or NANDSimpleSafeCloseAsync. Appropriate read and write permissions must be set for the parent directory of the file where the NANDSimpleSafe type of function is applied.

This function cannot be used to open more than one file that has the same file name (for example, attempting to save ~/userA/save.dat and ~/userB/save.dat at the same time will return NAND_RESULT_EXISTS).

The callback function specified with this function may receive NAND_RESULT_ALLOC_FAILED or NAND_RESULT_BUSY.

Revision History

2007/05/09 Initial version.