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#include "stdafx.h"
#include "IORequest.h"
#include "Thread.h"
namespace os {
#if defined(WINDOWS)
IORequest::IORequest(Handle handle, const Thread &thread, nat timeout)
: wake(0), handle(handle), bytes(0), error(0), thread(thread) {
Internal = 0;
InternalHigh = 0;
Offset = 0;
OffsetHigh = 0;
Pointer = NULL;
hEvent = NULL;
thread.threadData()->ioComplete.attach();
if (timeout) {
sleep.until = UThreadState::sleepTarget(timeout);
sleep.request = this;
thread.threadData()->uState.addSleep(&sleep);
}
}
IORequest::~IORequest() {
if (sleep.request)
thread.threadData()->uState.cancelSleep(&sleep);
thread.threadData()->ioComplete.detach();
}
void IORequest::complete(nat bytes) {
this->bytes = bytes;
this->error = 0;
wake.up();
}
void IORequest::failed(nat bytes, int error) {
this->bytes = bytes;
this->error = error;
wake.up();
}
void IOTimeoutSleep::signal() {
if (request) {
// This causes this particular IO request to be cancelled as normal. That means we don't
// have to do anything special to handle it, even if it was partially completed.
CancelIoEx(request->handle.v(), request);
}
request = null;
}
#elif defined(LINUX_IO_URING)
IORequest::IORequest(Handle handle, const Thread &thread)
: thread(thread), result(0), timeout(false), deallocate(false) {
zeroMem(request);
request.fd = handle.v();
}
int IORequest::submit(nat timeout) {
io().attach(Handle(request.fd), this);
if (timeout) {
sleep.until = UThreadState::sleepTarget(timeout);
sleep.request = this;
thread.threadData()->uState.addSleep(&sleep);
}
wake.wait();
return result;
}
int IORequest::submitAndDetach(nat timeout) {
io().attachAndRemove(Handle(request.fd), this);
if (timeout) {
sleep.until = UThreadState::sleepTarget(timeout);
sleep.request = this;
thread.threadData()->uState.addSleep(&sleep);
}
wake.wait();
return result;
}
void IORequest::submitDetachDelete(nat timeout) {
deallocate = true;
io().attachAndRemove(Handle(request.fd), this);
if (timeout) {
sleep.until = UThreadState::sleepTarget(timeout);
sleep.request = this;
thread.threadData()->uState.addSleep(&sleep);
}
}
IORequest::~IORequest() {
if (sleep.request)
thread.threadData()->uState.cancelSleep(&sleep);
io().detach(Handle(request.fd), this);
}
IOHandle &IORequest::io() {
return thread.threadData()->ioComplete;
}
void IORequest::onFinish(int result) {
this->result = result;
bool deallocate = this->deallocate;
wake.set();
// Note: We don't touch 'this' after calling 'set'. If we are stack allocated by another
// thread, we might be deallocated by now.
if (deallocate)
delete this;
}
void IOTimeoutSleep::signal() {
if (request) {
// Ask to cancel.
request->timeout = true;
request->io().cancel(request);
}
request = null;
}
#elif defined(POSIX)
IORequest::IORequest(Handle handle, Type type, const Thread &thread, nat timeout)
: type(type), closed(false), timeout(false), handle(handle), thread(thread) {
thread.threadData()->ioComplete.attach(handle, this);
if (timeout) {
sleep.until = UThreadState::sleepTarget(timeout);
sleep.request = this;
thread.threadData()->uState.addSleep(&sleep);
}
}
IORequest::~IORequest() {
if (sleep.request)
thread.threadData()->uState.cancelSleep(&sleep);
thread.threadData()->ioComplete.detach(handle, this);
}
void IOTimeoutSleep::signal() {
if (request) {
// We can just cancel it immediately. On UNIX, we always rely on OS-level buffers, so
// nothing is transferred outside of the calls to read/write.
request->timeout = true;
request->wake.set();
}
request = null;
}
#endif
}
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