#include <nitro/fs.h>
s32 FS_WriteFileAsync(FSFile* p_file, const void *src, s32 len);
p_file | Address of the FSFile structure |
src | Address of the buffer that stores the write data |
len | Byte length of data to be written. |
Returns the number of bytes if the data can be written properly. If not, returns -1
.
This function asynchronously writes data of the specified size beginning at the current location of the file pointer. When the specified size is greater than the available memory, data is written until the available memory is used up. The size of the written data is returned. Unlike the FS_WriteFile
function, it returns the control immediately and starts the asynchronous execution. Use the FS_IsBusy
function to confirm the completion of the process. Alternatively, use the FS_WaitAsync
function to wait for the completion.
If the archive cannot execute the asynchronous process with this function, it becomes the synchronous process, like the FS_WriteFile
function. For such archives, this function cannot be called from the interrupt handler (IRQ mode). Note that the process may not be completed if interrupts are prohibited.
FSFile, FS_WriteFile, FS_IsBusy, FS_WaitAsync, FS_GetLength, FS_GetPosition, FS_SeekFile, FS_SeekFileToBegin, FS_SeekFileToEnd
11/02/2004 Corrected name of argument.
09/24/2004 Added the description in the Caution section regarding the conditions for calling this function.
07/13/2004 Initial version.