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SB16: Use a snooze alarm to block the current thread while playing.

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This commit is contained in:
Andreas Kling 2019-07-13 20:15:17 +02:00
parent 54e79a4640
commit dcfa93e71f
2 changed files with 29 additions and 7 deletions
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17
Kernel/Devices/SB16.cpp
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@ -1,5 +1,6 @@
#include "SB16.h"
#include "IO.h"
#include <Kernel/Devices/SB16.h>
#include <Kernel/IO.h>
#include <Kernel/Thread.h>
#include <Kernel/VM/MemoryManager.h>
//#define SB16_DEBUG
@ -48,6 +49,7 @@ static SB16* s_the;
SB16::SB16()
: IRQHandler(5)
, CharacterDevice(42, 42) // ### ?
, m_interrupt_alarm(*this)
{
s_the = this;
initialize();
@ -141,11 +143,7 @@ void SB16::wait_for_irq()
#ifdef SB16_DEBUG
kprintf("SB16: waiting for interrupt...\n");
#endif
// FIXME: Add timeout.
while (!m_interrupted) {
// FIXME: Put this process into a Blocked state instead, it's stupid to wake up just to check a flag.
Scheduler::yield();
}
current->snooze_until(m_interrupt_alarm);
#ifdef SB16_DEBUG
kprintf("SB16: got interrupt!\n");
#endif
@ -196,3 +194,8 @@ ssize_t SB16::write(FileDescription&, const u8* data, ssize_t length)
wait_for_irq();
return length;
}
bool SB16InterruptAlarm::is_ringing() const
{
return m_device.got_interrupt({});
}