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sortix/io.cpp is now ready for new system call semantics.

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This commit is contained in:
Jonas 'Sortie' Termansen 2012-08-01 20:22:31 +02:00
parent 4810ccae39
commit af015491db
1 changed files with 14 additions and 1 deletions
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15
sortix/io.cpp
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@ -1,6 +1,6 @@
/*******************************************************************************
COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011, 2012.
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
This file is part of Sortix.
@ -23,6 +23,7 @@
*******************************************************************************/
#include <sortix/kernel/platform.h>
#include <sortix/kernel/kthread.h>
#include <libmaxsi/error.h>
#include <sortix/seek.h>
#include "thread.h"
@ -38,6 +39,7 @@ namespace Sortix
{
namespace IO
{
#ifdef GOT_FAKE_KTHREAD
struct SysWrite_t
{
union { size_t align1; int fd; };
@ -46,6 +48,7 @@ namespace Sortix
};
STATIC_ASSERT(sizeof(SysWrite_t) <= sizeof(Thread::scstate));
#endif
ssize_t SysWrite(int fd, const byte* buffer, size_t count)
{
@ -57,6 +60,7 @@ namespace Sortix
if ( !dev->IsType(Device::STREAM) ) { Error::Set(EBADF); return -1; }
DevStream* stream = (DevStream*) dev;
if ( !stream->IsWritable() ) { Error::Set(EBADF); return -1; }
#ifdef GOT_FAKE_KTHREAD
ssize_t written = stream->Write(buffer, count);
if ( 0 <= written ) { return written; }
if ( Error::Last() != EBLOCKING ) { return -1; }
@ -76,6 +80,9 @@ namespace Sortix
// Now go do something else.
Syscall::Incomplete();
return 0;
#else
return stream->Write(buffer, count);
#endif
}
// TODO: Not implemented yet due to stupid internal kernel design.
@ -85,6 +92,7 @@ namespace Sortix
return -1;
}
#ifdef GOT_FAKE_KTHREAD
struct SysRead_t
{
union { size_t align1; int fd; };
@ -93,6 +101,7 @@ namespace Sortix
};
STATIC_ASSERT(sizeof(SysRead_t) <= sizeof(Thread::scstate));
#endif
ssize_t SysRead(int fd, byte* buffer, size_t count)
{
@ -104,6 +113,7 @@ namespace Sortix
if ( !dev->IsType(Device::STREAM) ) { Error::Set(EBADF); return -1; }
DevStream* stream = (DevStream*) dev;
if ( !stream->IsReadable() ) { Error::Set(EBADF); return -1;}
#ifdef GOT_FAKE_KTHREAD
ssize_t bytesread = stream->Read(buffer, count);
if ( 0 <= bytesread ) { return bytesread; }
if ( Error::Last() != EBLOCKING ) { return -1; }
@ -123,6 +133,9 @@ namespace Sortix
// Now go do something else.
Syscall::Incomplete();
return 0;
#else
return stream->Read(buffer, count);
#endif
}
// TODO: Not implemented yet due to stupid internal kernel design.