// This may be called from an ISR, in which case we need to defer the close
bool FileStore::Close()
{
switch (usageMode)
{
case FileUseMode::free:
if (!inInterrupt())
{
INTERNAL_ERROR;
}
return false;
case FileUseMode::readOnly:
case FileUseMode::readWrite:
{
const irqflags_t flags = cpu_irq_save();
if (openCount > 1)
{
--openCount;
cpu_irq_restore(flags);
return true;
}
else if (inInterrupt())
{
closeRequested = true;
cpu_irq_restore(flags);
return true;
}
else
{
cpu_irq_restore(flags);
return ForceClose();
}
}
case FileUseMode::invalidated:
default:
{
const irqflags_t flags = cpu_irq_save();
if (openCount > 1)
{
--openCount;
}
else
{
usageMode = FileUseMode::free;
}
cpu_irq_restore(flags);
return true;
}
}
}
/* Timer interrupt handler */
static void
timerInterruptHandler (void) {
elapsedTickCount += elapsedTickIncrement;
elapsedTickIncrement = getTicksTillNextTimerInterrupt();
if (!inInterrupt()) {
inTimerInterrupt = 1;
if (!setjmp(interruptContext)) longjmp(mainContext, 1);
inTimerInterrupt = 0;
}
}
/* Idle interrupt handler */
static void
idleInterruptHandler (_go32_dpmi_registers *r) {
if (!inInterrupt()) {
inIdleInterrupt = 1;
if (!setjmp(interruptContext)) longjmp(mainContext, 1);
inIdleInterrupt = 0;
}
r->x.cs = origIdleSeginfo.rm_segment;
r->x.ip = origIdleSeginfo.rm_offset;
_go32_dpmi_simulate_fcall_iret(r);
}
// This may be called from an ISR, in which case we need to defer the close
bool FileStore::Close()
{
if (inInterrupt())
{
if (!inUse)
{
return false;
}
irqflags_t flags = cpu_irq_save();
if (openCount > 1)
{
--openCount;
}
else
{
closeRequested = true;
}
cpu_irq_restore(flags);
return true;
}
if (!inUse)
{
platform->Message(GENERIC_MESSAGE, "Error: Attempt to close a non-open file.\n");
return false;
}
irqflags_t flags = cpu_irq_save();
--openCount;
bool leaveOpen = (openCount != 0);
cpu_irq_restore(flags);
if (leaveOpen)
{
return true;
}
bool ok = true;
if (writing)
{
ok = Flush();
}
FRESULT fr = f_close(&file);
inUse = false;
writing = false;
closeRequested = false;
return ok && fr == FR_OK;
}
