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8cbb7f101f
This will allow us to implement different behaviors depending on the role of the descriptor a File is being accessed through.
30 lines
518 B
C++
30 lines
518 B
C++
#include "ZeroDevice.h"
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#include <AK/StdLibExtras.h>
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#include <AK/kstdio.h>
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ZeroDevice::ZeroDevice()
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: CharacterDevice(1, 5)
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{
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}
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ZeroDevice::~ZeroDevice()
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{
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}
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bool ZeroDevice::can_read(FileDescriptor&) const
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{
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return true;
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}
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ssize_t ZeroDevice::read(FileDescriptor&, byte* buffer, ssize_t size)
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{
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ssize_t count = min(PAGE_SIZE, size);
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memset(buffer, 0, (size_t)count);
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return count;
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}
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ssize_t ZeroDevice::write(FileDescriptor&, const byte*, ssize_t size)
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{
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return min(PAGE_SIZE, size);
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}
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