Examples with Poll.pollfd com.oracle.svm.core.posix.headers.Poll.pollfd used on opensource projects

Example 1 with Poll.pollfd

use of com.oracle.svm.core.posix.headers.Poll.pollfd in project graal by oracle.

the class JavavmExportJvm method timeout.

// 198 inline int os::timeout(int fd, long timeout) {
static int timeout(int fd, long timeoutArg) {
    /*
         * Local copy of argument because it is modified.
         * Also, convert from long to int to pass to Poll.poll.
         */
    int timeout = (int) timeoutArg;
    // 199   julong prevtime,newtime;
    /* Using System.currentTimeMillis() instead of gettimeofday(struct timeval*) */
    long prevtime;
    long newtime;
    // 200   struct timeval t;
    // 201
    // 202   gettimeofday(&t, NULL);
    // 203   prevtime = ((julong)t.tv_sec * 1000)  +  t.tv_usec / 1000;
    prevtime = System.currentTimeMillis();
    // 204
    // 205   for(;;) {
    // 206     struct pollfd pfd;
    Poll.pollfd pfd = StackValue.get(2, SizeOf.get(Time.timeval.class));
    for (; ; ) {
        // 207
        // 208     pfd.fd = fd;
        pfd.set_fd(fd);
        // 209     pfd.events = POLLIN | POLLERR;
        pfd.set_events(Poll.POLLIN() | Poll.POLLERR());
        // 210
        // 211     int res = ::poll(&pfd, 1, timeout);
        /* { FIXME: Limited timeout. */
        int res;
        final boolean limitedTimeout = false;
        if (limitedTimeout) {
            /* This is a compromise between frequent poll requests and promptness of interruption. */
            final int limitedTimeoutMillis = 2_000;
            res = Poll.poll(pfd, 1, limitedTimeoutMillis);
            if (Thread.interrupted()) {
                return VmRuntimeOS.OSReturn.OS_OK();
            }
        } else {
            res = Poll.poll(pfd, 1, timeout);
        }
        // 213     if (res == OS_ERR && errno == EINTR) {
        if (res == VmRuntimeOS.OSReturn.OS_ERR() && Errno.errno() == Errno.EINTR()) {
            // 217       if(timeout >= 0) {
            if (timeout >= 0) {
                // 218         gettimeofday(&t, NULL);
                // 219         newtime = ((julong)t.tv_sec * 1000)  +  t.tv_usec / 1000;
                newtime = System.currentTimeMillis();
                // 220         timeout -= newtime - prevtime;
                timeout -= newtime - prevtime;
                // 221         if(timeout <= 0)
                if (timeout <= 0) {
                    // 222           return OS_OK;
                    return VmRuntimeOS.OSReturn.OS_OK();
                }
                // 223         prevtime = newtime;
                prevtime = newtime;
            }
        } else {
            // 226       return res;
            return res;
        }
    }
}