// Close is idempotent and thread safe.
bool file_storage::close()
{
std::string error_name;
////if (!closed_)
//// log_unmapping();
// Critical Section
///////////////////////////////////////////////////////////////////////////
mutex_.lock_upgrade();
if (closed_)
{
mutex_.unlock_upgrade();
//---------------------------------------------------------------------
return true;
}
mutex_.unlock_upgrade_and_lock();
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
closed_ = true;
if (logical_size_ > file_size_)
error_name = "fit";
else if (msync(data_, logical_size_, MS_SYNC) == FAIL)
error_name = "msync";
else if (munmap(data_, file_size_) == FAIL)
error_name = "munmap";
else if (ftruncate(file_handle_, logical_size_) == FAIL)
error_name = "ftruncate";
else if (fsync(file_handle_) == FAIL)
error_name = "fsync";
else if (::close(file_handle_) == FAIL)
error_name = "close";
mutex_.unlock();
///////////////////////////////////////////////////////////////////////////
// Keep logging out of the critical section.
if (!error_name.empty())
return handle_error(error_name, filename_);
log_unmapped();
return true;
}
void Nes_Core::write_io( nes_addr_t addr, int data )
{
// sprite dma
if ( addr == 0x4014 )
{
ppu.dma_sprites( clock(), cpu::get_code( data * 0x100 ) );
cpu_adjust_time( 513 );
return;
}
// joypad strobe
if ( addr == 0x4016 )
{
// if strobe goes low, latch data
if ( joypad.w4016 & 1 & ~data )
{
joypad_read_count++;
joypad.joypad_latches [0] = current_joypad [0];
joypad.joypad_latches [1] = current_joypad [1];
}
joypad.w4016 = data;
return;
}
// apu
if ( unsigned (addr - impl->apu.start_addr) <= impl->apu.end_addr - impl->apu.start_addr )
{
impl->apu.write_register( clock(), addr, data );
if ( wait_states_enabled )
{
if ( addr == 0x4010 || (addr == 0x4015 && (data & 0x10)) )
{
impl->apu.run_until( clock() + 1 );
event_changed();
}
}
return;
}
#ifndef NDEBUG
log_unmapped( addr, data );
#endif
}
