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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "nacl_io/socket/unix_event_emitter.h"
#include <stdlib.h>
#include "nacl_io/fifo_char.h"
#include "sdk_util/scoped_ref.h"
namespace nacl_io {
class UnixChildEventEmitter;
class UnixMasterEventEmitter;
typedef sdk_util::ScopedRef<UnixMasterEventEmitter>
ScopedUnixMasterEventEmitter;
class UnixMasterEventEmitter : public UnixEventEmitter {
public:
explicit UnixMasterEventEmitter(size_t size)
: in_fifo_(size),
out_fifo_(size),
child_emitter_created_(false),
child_emitter_(NULL) {
UpdateStatus_Locked();
}
virtual ScopedUnixEventEmitter GetPeerEmitter();
protected:
virtual FIFOChar* in_fifoc() { return &in_fifo_; }
virtual FIFOChar* out_fifoc() { return &out_fifo_; }
virtual const sdk_util::SimpleLock& GetFifoLock() { return fifo_lock_; }
private:
FIFOChar in_fifo_;
FIFOChar out_fifo_;
sdk_util::SimpleLock fifo_lock_;
bool child_emitter_created_;
UnixChildEventEmitter* child_emitter_;
friend class UnixChildEventEmitter;
};
class UnixChildEventEmitter : public UnixEventEmitter {
public:
explicit UnixChildEventEmitter(UnixMasterEventEmitter* parent)
: parent_emitter_(parent) {
UpdateStatus_Locked();
}
virtual ScopedUnixEventEmitter GetPeerEmitter() { return parent_emitter_; }
protected:
virtual void Destroy() { parent_emitter_->child_emitter_ = NULL; }
virtual FIFOChar* in_fifoc() { return parent_emitter_->out_fifoc(); }
virtual FIFOChar* out_fifoc() { return parent_emitter_->in_fifoc(); }
virtual const sdk_util::SimpleLock& GetFifoLock() {
return parent_emitter_->GetFifoLock();
}
private:
ScopedUnixMasterEventEmitter parent_emitter_;
};
ScopedUnixEventEmitter UnixMasterEventEmitter::GetPeerEmitter() {
if (!child_emitter_created_) {
child_emitter_created_ = true;
child_emitter_ = new UnixChildEventEmitter(this);
}
return sdk_util::ScopedRef<UnixChildEventEmitter>(child_emitter_);
}
uint32_t UnixEventEmitter::ReadIn_Locked(char* data, uint32_t len) {
AUTO_LOCK(GetFifoLock());
uint32_t count = in_fifoc()->Read(data, len);
ScopedUnixEventEmitter peer = GetPeerEmitter();
if (peer) {
peer->UpdateStatus_Locked();
}
UpdateStatus_Locked();
return count;
}
uint32_t UnixEventEmitter::WriteOut_Locked(const char* data, uint32_t len) {
AUTO_LOCK(GetFifoLock());
uint32_t count = out_fifoc()->Write(data, len);
ScopedUnixEventEmitter peer = GetPeerEmitter();
if (peer) {
peer->UpdateStatus_Locked();
}
UpdateStatus_Locked();
return count;
}
ScopedUnixEventEmitter UnixEventEmitter::MakeUnixEventEmitter(size_t size) {
return ScopedUnixEventEmitter(new UnixMasterEventEmitter(size));
}
} // namespace nacl_io
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