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b0e3f73375
Userspace programs can now open /dev/gui_events and read a stream of GUI_Event structs one at a time. I was stuck on a stupid problem where we'd reenter Scheduler::yield() due to having one of the has_data_available_for_reading() implementations using locks.
29 lines
438 B
C++
29 lines
438 B
C++
#include "NullDevice.h"
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#include "Limits.h"
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#include <AK/StdLibExtras.h>
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#include <AK/kstdio.h>
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NullDevice::NullDevice()
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: CharacterDevice(1, 3)
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{
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}
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NullDevice::~NullDevice()
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{
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}
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bool NullDevice::has_data_available_for_reading(Process&) const
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{
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return true;
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}
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ssize_t NullDevice::read(byte*, size_t)
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{
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return 0;
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}
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ssize_t NullDevice::write(const byte*, size_t bufferSize)
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{
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return min(GoodBufferSize, bufferSize);
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}
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