diff --git a/hongweiz/adcapp/src/EINTR_wrappers.c b/hongweiz/adcapp/src/EINTR_wrappers.c
new file mode 100644
index 0000000..b60622e
--- /dev/null
+++ b/hongweiz/adcapp/src/EINTR_wrappers.c
@@ -0,0 +1,826 @@
+
+/*
+* File: EINTR_wrappers.c
+*
+* This file implements the wrapper functions for some of the System APIs
+*
+* Copyright (C) <2019>  <American Megatrends International LLC>
+*
+*/
+
+#include "EINTR_wrappers.h"
+#if defined(__linux__)
+#include <sys/msg.h>
+#include <sys/file.h>
+#endif
+#include <errno.h>
+#include <unistd.h>
+
+static const int OneSecondasNS = 1000000000;
+
+#ifndef bool
+typedef int bool;
+#endif
+
+#ifndef TRUE
+#define TRUE (1)
+#endif
+
+#ifndef FALSE
+#define FALSE (0)
+#endif
+
+typedef struct
+{
+    bool OnePoll;
+    struct timespec EndTime, Timeout;
+} SIGWRAP_TIMEOUT;
+
+static void sigwrap_InitTimeout(SIGWRAP_TIMEOUT *pDst, const struct timespec *timeout)
+{
+    pDst->Timeout = *timeout;
+
+    if ((timeout->tv_sec == 0) && (timeout->tv_nsec == 0))                  // If both value are zero than only a single poll is requested!
+    {
+        pDst->OnePoll = 1;
+        return;
+    }
+
+    pDst->OnePoll = 0;
+
+    struct timespec Now;
+
+    (void)clock_gettime(CLOCK_MONOTONIC_RAW, &Now);                         // CLOCK_MONOTONIC_RAW is not affected by NTP etc.
+
+    pDst->EndTime.tv_sec = Now.tv_sec + pDst->Timeout.tv_sec;               // Check necessary in 2038 due to signed integer variables
+    pDst->EndTime.tv_nsec = Now.tv_nsec + pDst->Timeout.tv_nsec;
+
+    if (pDst->EndTime.tv_nsec >= OneSecondasNS)
+    {
+        pDst->EndTime.tv_sec += (pDst->EndTime.tv_nsec / OneSecondasNS);
+        pDst->EndTime.tv_nsec = (pDst->EndTime.tv_nsec % OneSecondasNS);
+    }
+}
+
+
+static bool sigwrap_CheckTimeout(SIGWRAP_TIMEOUT *pTo)
+{
+    if (pTo->OnePoll == TRUE) // Make sure, that in the case that a single poll is requested at least one call is not terminated with EINTR
+        return FALSE;
+
+    struct timespec Now;
+
+    (void)clock_gettime(CLOCK_MONOTONIC_RAW, &Now);
+
+    if (Now.tv_sec > pTo->EndTime.tv_sec) // Can become a problem already in 2038 due to signed integer variables
+        return TRUE;
+
+    pTo->Timeout.tv_nsec = pTo->EndTime.tv_nsec - Now.tv_nsec;
+    pTo->Timeout.tv_sec = pTo->EndTime.tv_sec - Now.tv_sec;
+
+    if (pTo->Timeout.tv_sec == 0)
+    {
+        if (pTo->Timeout.tv_nsec <= 0)
+            return TRUE;
+    }
+    else if (pTo->Timeout.tv_nsec < 0)
+    {
+        pTo->Timeout.tv_nsec += OneSecondasNS;
+        pTo->Timeout.tv_sec--;
+    }
+
+    return FALSE;
+}
+
+
+
+int sigwrap_semop(int semid, struct sembuf *sops, size_t nsops)
+{
+    while (1)
+    {
+        if (semop(semid, sops, nsops) == 0)
+            return 0;
+
+        if (errno != EINTR)
+            return -1;
+    }
+}
+
+#if 0
+int sigwrap_semtimedop(int semid, struct sembuf *sops, size_t nsops, const struct timespec *timeout)
+{
+    SIGWRAP_TIMEOUT To;
+
+    if (timeout == NULL)
+        return (sigwrap_semop(semid, sops, nsops));
+
+    sigwrap_InitTimeout(&To, timeout);
+
+    while (1)
+    {
+        if (semtimedop(semid, sops, nsops, &To.Timeout) == 0)
+            return 0;
+
+        if (errno != EINTR)
+            return -1;
+
+        if (sigwrap_CheckTimeout(&To))
+        {
+            errno = EAGAIN;
+            return -1;
+        }
+    }
+}
+#endif
+
+int sigwrap_epoll_wait(int epfd, struct epoll_event *events, int maxevents, int timeout)
+{
+    SIGWRAP_TIMEOUT To;
+
+    if (timeout != -1)
+    {
+        struct timespec Timeout;
+
+        Timeout.tv_sec = timeout / 1000;
+        Timeout.tv_nsec = (timeout % 1000) * 1000000; // Convert msec to nsec
+
+        sigwrap_InitTimeout(&To, &Timeout);
+    }
+
+    while (1)
+    {
+        int Result = epoll_wait(epfd, events, maxevents, timeout);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+
+        if (timeout == -1)
+            continue;
+
+        if (sigwrap_CheckTimeout(&To))
+            return 0;
+
+        timeout = To.Timeout.tv_sec * 1000 + To.Timeout.tv_nsec / 1000000;
+    }
+}
+
+
+int sigwrap_epoll_pwait(int epfd, struct epoll_event *events, int maxevents, int timeout, const sigset_t *sigmask)
+{
+    SIGWRAP_TIMEOUT To;
+
+    if (timeout != -1)
+    {
+        struct timespec Timeout;
+
+        Timeout.tv_sec = timeout / 1000;
+        Timeout.tv_nsec = (timeout % 1000) * 1000000; // Convert msec to nsec
+
+        sigwrap_InitTimeout(&To, &Timeout);
+    }
+
+    while (1)
+    {
+        int Result = epoll_pwait(epfd, events, maxevents, timeout, sigmask);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+
+        if (timeout == -1)
+            continue;
+
+        if (sigwrap_CheckTimeout(&To))
+            return 0;
+
+        timeout = To.Timeout.tv_sec * 1000 + To.Timeout.tv_nsec / 1000000;
+    }
+}
+
+
+int sigwrap_sigwaitinfo(const sigset_t *set, siginfo_t *info)
+{
+    while (1)
+    {
+        int Result = sigwaitinfo(set, info);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+    }
+}
+
+
+int sigwrap_sigtimedwait(const sigset_t *set, siginfo_t *info, const struct timespec *timeout)
+{
+    SIGWRAP_TIMEOUT To;
+
+    sigwrap_InitTimeout(&To, timeout);
+
+    while (1)
+    {
+        int Result = sigtimedwait(set, info, &To.Timeout);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+
+        if (sigwrap_CheckTimeout(&To))
+            return 0;
+    }
+}
+
+
+int sigwrap_nanosleep(const struct timespec *req, struct timespec *rem)
+{
+    struct timespec Wait, Remain;
+
+    if (!rem)
+        rem = &Remain;
+
+    Wait = *req;
+
+    while (1)
+    {
+        if (nanosleep(&Wait, rem) == 0)
+            return 0;
+
+        if (errno != EINTR)
+            return -1;
+
+        Wait = *rem;
+    }
+}
+
+
+int sigwrap_clock_nanosleep(clockid_t clock_id, int flags, const struct timespec *request, struct timespec *remain)
+{
+    struct timespec Wait, Remain;
+
+    if (!remain)
+        remain = &Remain;
+
+    Wait = *request;
+
+    while (1)
+    {
+        int Result = clock_nanosleep(clock_id, flags, &Wait, remain);
+        
+        if (Result == 0)
+            return Result;
+
+        if (Result != EINTR)
+            return Result;
+
+        if (flags != TIMER_ABSTIME)
+            Wait = *remain;
+    }
+}
+
+
+int sigwrap_usleep(useconds_t usec)
+{
+    SIGWRAP_TIMEOUT To;
+
+    struct timespec Timeout;
+
+    Timeout.tv_sec = usec / 1000000;
+    Timeout.tv_nsec = (usec % 1000000) * 1000;
+
+    sigwrap_InitTimeout(&To, &Timeout);
+
+    while (1)
+    {
+        if (usleep(usec) == 0)
+            return 0;
+
+        if (errno != EINTR)
+            return -1;
+
+        if (sigwrap_CheckTimeout(&To))
+            return 0;
+
+        usec = To.Timeout.tv_sec * 1000000 + To.Timeout.tv_nsec / 1000;
+    }
+}
+
+
+int sigwrap_poll(struct pollfd *fds, nfds_t nfds, int timeout)
+{
+    SIGWRAP_TIMEOUT To;
+
+    if (timeout > 0)
+    {
+        struct timespec Timeout;
+
+        Timeout.tv_sec = timeout / 1000;
+        Timeout.tv_nsec = (timeout % 1000) * 1000000;
+
+        sigwrap_InitTimeout(&To, &Timeout);
+    }
+
+    while (1)
+    {
+        int Result = poll(fds, nfds, timeout);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+
+        if (timeout < 0) // Specifying a negative value in timeout means an infinite/no timeout. 
+            continue;
+        else if (timeout == 0)
+            continue; // We want to make sure that at least one check was not aborted with EINTR
+
+        if (sigwrap_CheckTimeout(&To))
+            return 0;
+
+        timeout = To.Timeout.tv_sec * 1000 + To.Timeout.tv_nsec / 1000000;
+    }
+}
+
+#if 0
+int sigwrap_ppoll(struct pollfd *fds, nfds_t nfds, const struct timespec *tmo_p, const sigset_t *sigmask)
+{
+    SIGWRAP_TIMEOUT To;
+
+    if (tmo_p != NULL)
+    {
+        sigwrap_InitTimeout(&To, tmo_p);
+        tmo_p = &To.Timeout;
+    }
+
+    while (1)
+    {
+        int Result = ppoll(fds, nfds, tmo_p, sigmask);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+
+        if (tmo_p == NULL)
+            continue;
+
+        if (sigwrap_CheckTimeout(&To))
+            return 0;
+    }
+}
+#endif
+
+int sigwrap_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout)
+{
+    while (1)
+    {
+        int Result = select(nfds, readfds, writefds, exceptfds, timeout);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+    }
+}
+
+
+int sigwrap_pselect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, const struct timespec *timeout,
+                    const sigset_t *sigmask)
+{
+    SIGWRAP_TIMEOUT To;
+
+    if (timeout != NULL)
+    {
+        sigwrap_InitTimeout(&To, timeout);
+        timeout = &To.Timeout;
+    }
+
+    while (1)
+    {
+        int Result = pselect(nfds, readfds, writefds, exceptfds, timeout, sigmask);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+
+        if (timeout == NULL)
+            continue;
+
+        if (sigwrap_CheckTimeout(&To))
+            return 0;
+    }
+}
+
+
+int sigwrap_msgsnd(int msqid, const void *msgp, size_t msgsz, int msgflg)
+{
+    while (1)
+    {
+        int Result = msgsnd(msqid, msgp, msgsz, msgflg);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+    }
+}
+
+
+ssize_t sigwrap_msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg)
+{
+    while (1)
+    {
+        ssize_t Result = msgrcv(msqid, msgp, msgsz, msgtyp, msgflg);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+    }
+}
+
+
+int sigwrap_connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
+{
+    while (1)
+    {
+        int Result = connect(sockfd, addr, addrlen);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+    }
+}
+
+
+ssize_t sigwrap_send(int sockfd, const void *buf, size_t len, int flags)
+{
+    while (1)
+    {
+        ssize_t Result = send(sockfd, buf, len, flags);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+    }
+}
+
+
+ssize_t sigwrap_sendto(int sockfd, const void *buf, size_t len, int flags, const struct sockaddr *dest_addr,
+                       socklen_t addrlen)
+{
+    while (1)
+    {
+        ssize_t Result = sendto(sockfd, buf, len, flags, dest_addr, addrlen);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+    }
+}
+
+
+ssize_t sigwrap_sendsendmsg(int sockfd, const struct msghdr *msg, int flags)
+{
+    while (1)
+    {
+        ssize_t Result = sendmsg(sockfd, msg, flags);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+    }
+}
+
+
+int sigwrap_accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen)
+{
+    while (1)
+    {
+        int Result = accept(sockfd, addr, addrlen);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+    }
+}
+
+#if 0
+int sigwrap_accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags)
+{
+    while (1)
+    {
+        int Result = accept4(sockfd, addr, addrlen, flags);
+
+        if (Result != -1)
+            return Result;
+
+        if (errno != EINTR)
+            return Result;
+    }
+}
+#endif
+
+// EINTR wrapper for the standard read() function. Can be used for sockets that are the to non-blocking mode.
+// The length of the returned data can be shorter than the requested one!
+
+ssize_t sigwrap_read(int fd, void *buf, size_t count)
+{
+    while (1)
+    {
+        ssize_t Result = read(fd, buf, count);
+
+        if (Result != -1)
+            return (Result);
+
+        if (errno != EINTR)
+            return (Result);
+    }
+}
+
+
+// EINTR wrapper for the standard read() function. Waits until ALL requested data is available. Use the non-blocking version (sigwrap_read)
+// for sockets that are set to non-blocking mode or when partial data is okay
+// Although the description for the read() function describes it differently, it seems possible that the original function may already return
+// even though partial data has already been read. This implementation makes sure that all requested data have been read.
+// See the comment in the signal description https://linux.die.net/man/7/signal
+//* read(2), readv(2), write(2), writev(2), and ioctl(2) calls on "slow" devices. 
+//* A "slow" device is one where the I/O call may block for an indefinite time, for example, a terminal, pipe, or socket. 
+//* (A disk is not a slow device according to this definition.) If an I/O call on a slow device has already transferred
+//* some data by the time it is interrupted by a signal handler, then the call will return a success status (normally, the number of bytes transferred). 
+
+ssize_t sigwrap_blocking_read(int hFile, void *pData, size_t RdLen)
+{
+    ssize_t Transfered;
+    ssize_t Len = RdLen;
+
+    while ((Transfered = read(hFile, pData, Len)) != Len)
+    {
+        if (Transfered == 0) // EOF reached?
+            return 0;
+
+        if (Transfered != -1)
+        {
+            pData += Transfered;
+            Len -= Transfered;
+            continue;
+        }
+
+        if (errno != EINTR)
+            return -1;
+    }
+
+    return RdLen;
+}
+
+
+ssize_t sigwrap_readv(int fd, const struct iovec *iov, int iovcnt)
+{
+    while (1)
+    {
+        ssize_t Result = readv(fd, iov, iovcnt);
+
+        if (Result != -1)
+            return (Result);
+
+        if (errno != EINTR)
+            return (Result);
+    }
+}
+
+
+ssize_t sigwrap_recv(int sockfd, void *buf, size_t len, int flags)
+{
+    while (1)
+    {
+        ssize_t Result = recv(sockfd, buf, len, flags);
+
+        if (Result != -1)
+            return (Result);
+
+        if (errno != EINTR)
+            return (Result);
+    }
+}
+
+
+ssize_t sigwrap_recvfrom(int sockfd, void *buf, size_t len, int flags, struct sockaddr *src_addr, socklen_t *addrlen)
+{
+    while (1)
+    {
+        ssize_t Result = recvfrom(sockfd, buf, len, flags, src_addr, addrlen);
+
+        if (Result != -1)
+            return (Result);
+
+        if (errno != EINTR)
+            return (Result);
+    }
+}
+
+
+ssize_t sigwrap_recvmsg(int sockfd, struct msghdr *msg, int flags)
+{
+    while (1)
+    {
+        ssize_t Result = recvmsg(sockfd, msg, flags);
+
+        if (Result != -1)
+            return (Result);
+
+        if (errno != EINTR)
+            return (Result);
+    }
+}
+
+
+// EINTR wrapper for the standard write() function. Can be used for sockets that are the to non-blocking mode.
+// The length of the effectively written data can be shorter than the length specified at the function call!
+
+ssize_t sigwrap_write(int fd, const void *buf, size_t count)
+{
+    while (1)
+    {
+        ssize_t Result = write(fd, buf, count);
+
+        if (Result != -1)
+            return (Result);
+
+        if (errno != EINTR)
+            return (Result);
+    }
+}
+
+// EINTR wrapper for the standard write() function. Waits until ALL data is written! Use the non-blocking version (sigwrap_write)
+// for sockets that are set to non-blocking mode, or when it is OK to write only partial data.
+// Although the description for the write() function describes it differently, it seems possible that the original function may already return
+// even though partial data has already been written. This implementation makes sure that all requested data have been written.
+// See the comment in the signal description https://linux.die.net/man/7/signal
+//* read(2), readv(2), write(2), writev(2), and ioctl(2) calls on "slow" devices. 
+//* A "slow" device is one where the I/O call may block for an indefinite time, for example, a terminal, pipe, or socket. 
+//* (A disk is not a slow device according to this definition.) If an I/O call on a slow device has already transferred
+//* some data by the time it is interrupted by a signal handler, then the call will return a success status (normally, the number of bytes transferred). 
+        
+ssize_t sigwrap_blocking_write(int hFile, const void *pData, ssize_t WrtLen)
+{
+    ssize_t Written;
+    ssize_t Len = WrtLen;
+
+    while ((Written = write(hFile, pData, Len)) != Len)
+    {
+        if (Written != -1)
+        {
+            pData += Written;
+            Len -= Written;
+            continue;
+        }
+
+        if (errno != EINTR)
+            return -1;
+    }
+
+    return WrtLen;
+}
+
+
+ssize_t sigwrap_writev(int fd, const struct iovec *iov, int iovcnt)
+{
+    while (1)
+    {
+        ssize_t Result = writev(fd, iov, iovcnt);
+
+        if (Result != -1)
+            return (Result);
+
+        if (errno != EINTR)
+            return (Result);
+    }
+}
+
+
+int sigwrap_close(int hFile)
+{
+    while (close(hFile) == -1)
+    {
+        if (errno != EINTR)
+            return -1;
+    }
+
+    return 0;
+}
+
+
+int sigwrap_open_mode(const char *pathname, int flags, mode_t mode)
+{
+    while (1)
+    {
+        int hFile = open(pathname, flags, mode);
+        
+        if(hFile != -1)
+            return hFile;
+        
+        if (errno != EINTR)
+            return hFile;
+    }
+}
+
+int sigwrap_open(const char *pathname, int flags)
+{
+    while (1)
+    {
+        int hFile = open(pathname, flags);
+        
+        if(hFile != -1)
+            return hFile;
+        
+        if (errno != EINTR)
+            return hFile;
+    }
+}
+
+
+pid_t sigwrap_wait(int *status)
+{
+    while(1)
+    {
+        pid_t Result = wait(status);
+        
+        if(Result != -1)
+            return Result;
+        
+        if(errno != EINTR)
+            return Result;
+    }
+}
+
+
+pid_t sigwrap_waitpid(pid_t pid, int *status, int options)
+{
+    while(1)
+    {
+        pid_t Result = waitpid(pid, status, options);
+        
+        if(Result != -1)
+            return Result;
+        
+        if(errno != EINTR)
+            return Result;
+    }
+}
+
+
+int sigwrap_waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options)
+{
+    while(1)
+    {
+        int Result = waitid(idtype, id, infop, options);
+        
+        if(Result != -1)
+            return Result;
+        
+        if(errno != EINTR)
+            return Result;
+    }
+}
+
+
+int sigwrap_flock(int fd, int operation) 
+{
+    while(1)
+    {
+        int Result = flock(fd, operation);
+        
+        if(Result != -1)
+            return Result;
+        
+        if(errno != EINTR)
+            return Result;
+    }
+}
+
+