// Mark a block free in the bitmap
void
free_block(uint32_t blockno)
{
// Blockno zero is the null pointer of block numbers.
if (blockno == 0)
panic("attempt to free zero block");
bitmap[blockno/32] |= 1<<(blockno%32);
//bitmap should be flushed - ren
if(flush_bitmap())
panic("flushing bitmap failed!");
}
// Search the bitmap for a free block and allocate it.
//
// Return block number allocated on success,
// -E_NO_DISK if we are out of blocks.
int
alloc_block_num(void)
{
// LAB 5: Your code here.
int i;
for(i=0; i < super->s_nblocks; i++)
if (block_is_free(i)){
bitmap[i/32] &= ~(1<<(i%32)); //fancy - ren
if(flush_bitmap())
panic("flushing bitmap failed!");
return i;
}
return -E_NO_DISK;
}
LRESULT window_visualisation::on_message(HWND wnd,UINT msg,WPARAM wp,LPARAM lp)
{
if(msg == WM_CREATE)
{
m_wnd = wnd;
long flags = WS_EX_CONTROLPARENT;
if (m_frame == 1) flags |= WS_EX_CLIENTEDGE;
if (m_frame == 2) flags |= WS_EX_STATICEDGE;
uSetWindowLong(wnd, GWL_EXSTYLE, flags);
SetWindowPos(wnd,0,0,0,0,0,SWP_NOMOVE|SWP_NOSIZE|SWP_FRAMECHANGED);
list_vis.add_item(this);
initialised = true;
ui_extension::visualisation::create_by_guid(get_visualisation_guid(), p_vis);
if (p_vis.is_valid())
{
GetClientRect(wnd, &rc_client);
window_visualisation_interface::g_create(m_interface, this);
try{
p_vis->set_config(&stream_reader_memblock_ref(m_data.get_ptr(), m_data.get_size()),m_data.get_size(),abort_callback_impl());
}catch(const exception_io &){};
p_vis->enable(ui_extension::visualisation_host_ptr(m_interface.get_ptr()));
}
}
else if (msg == WM_DESTROY)
{
if (p_vis.is_valid())
p_vis->disable();
flush_bitmap();
m_interface.release();
initialised = false;
list_vis.remove_item(this);
m_wnd=0;
}
else if (msg == WM_PAINT)
{
if (p_vis.is_valid())
{
RECT rc_paint;
if (!GetUpdateRect(wnd, &rc_paint, 0))
{
rc_paint = rc_client;
}
HDC dc = GetDC(wnd);
HDC dc_bmp = CreateCompatibleDC(0);
if (!bm_display) make_bitmap(dc);
HGDIOBJ meh = SelectObject(dc_bmp,bm_display);
BitBlt(dc,0,0,rc_client.right,rc_client.bottom,dc_bmp,0,0,SRCCOPY);
SelectObject(dc_bmp,meh);
DeleteDC(dc_bmp);
ReleaseDC(wnd, dc);
ValidateRect(wnd, &rc_paint);
}
}
else if (msg == WM_WINDOWPOSCHANGED)
{
LPWINDOWPOS lpwp = (LPWINDOWPOS)lp;
if (!(lpwp->flags & SWP_NOSIZE))
{
GetClientRect(wnd, &rc_client);
flush_bitmap();
}
}
else if (msg == WM_ERASEBKGND)
{
return FALSE;
}
return uDefWindowProc(wnd,msg,wp,lp);
}
