FF_ERROR FF_FlushCache ( FF_IOMAN * pIoman )

Flushes all Write cache buffers with no active Handles.

Parameters:

pIoman IOMAN Object.

Returns:: FF_ERR_NONE on Success.

Definition at line 297 of file ff_ioman.c.

Referenced by FF_Close(), FF_CreateFile(), FF_MkDir(), FF_Move(), FF_RmDir(), FF_RmFile(), FF_Seek(), and FF_UnmountPartition().

                                         {

    FF_T_UINT16 i,x;

    if(!pIoman) {
        return FF_ERR_NULL_POINTER | FF_FLUSHCACHE;
    }

    FF_PendSemaphore(pIoman->pSemaphore);
    {
        for(i = 0; i < pIoman->CacheSize; i++) {
            if((pIoman->pBuffers + i)->NumHandles == 0 && (pIoman->pBuffers + i)->Modified == FF_TRUE) {

                FF_BlockWrite(pIoman, (pIoman->pBuffers + i)->Sector, 1, (pIoman->pBuffers + i)->pBuffer);

                // Buffer has now been flushed, mark it as a read buffer and unmodified.
                (pIoman->pBuffers + i)->Mode = FF_MODE_READ;
                (pIoman->pBuffers + i)->Modified = FF_FALSE;

                // Search for other buffers that used this sector, and mark them as modified
                // So that further requests will result in the new sector being fetched.
                for(x = 0; x < pIoman->CacheSize; x++) {
                    if(x != i) {
                        if((pIoman->pBuffers + x)->Sector == (pIoman->pBuffers + i)->Sector && (pIoman->pBuffers + x)->Mode == FF_MODE_READ) {
                            (pIoman->pBuffers + x)->Modified = FF_TRUE;
                        }
                    }
                }
            }
        }
    }
    FF_ReleaseSemaphore(pIoman->pSemaphore);

    return FF_ERR_NONE;
}

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