linux-sgx-trts-modified/psw/ae/common/inc/NonBlockingUnixCommunicationSocket.h

/*
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 * modification, are permitted provided that the following conditions
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#ifndef __AE_NON_BLOCKING_COMM_SOCKET_H
#define __AE_NON_BLOCKING_COMM_SOCKET_H

#include <UnixCommunicationSocket.h>

#define MAX_EVENTS  12

class NonBlockingUnixCommunicationSocket : public UnixCommunicationSocket
{
public:
    NonBlockingUnixCommunicationSocket(const char* socketbase) : UnixCommunicationSocket(socketbase), mEvents(NULL), mEpoll(-1) {}    
    NonBlockingUnixCommunicationSocket(int socket) : UnixCommunicationSocket(socket), mEvents(NULL), mEpoll(-1) {}

    ~NonBlockingUnixCommunicationSocket();

    bool  init();
    char* readRaw(ssize_t length);
    ssize_t  writeRaw(const char* data, ssize_t length);
    int   getSockDescriptor();
    bool wasTimeoutDetected();
    bool setTimeout(uint32_t milliseconds);

    void Cancel() const;

protected:
    bool MakeNonBlocking();
    ssize_t partialRead(char* buffer, ssize_t maxLength);

    //members
    struct  epoll_event *mEvents;   //epoll for events on two sources: 0->special command pipe. 1->the socket
    int     mEpoll;
    int     mCommandPipe[2];
private:
    //non-copyable
    NonBlockingUnixCommunicationSocket(const NonBlockingUnixCommunicationSocket&);
    NonBlockingUnixCommunicationSocket& operator=(const NonBlockingUnixCommunicationSocket&);
};

#endif