1 files changed, 173 insertions, 0 deletions
diff --git a/solenv/unxmacxp/inc/poll.h b/solenv/unxmacxp/inc/poll.h
new file mode 100644
index 000000000000..761b59dbec1f
--- /dev/null
+++ b/solenv/unxmacxp/inc/poll.h
@@ -0,0 +1,173 @@
+// poll.h
+// MacOS X does not implement poll().  Therefore, this replacement
+// is required.  It uses select().
+
+#ifndef _FAKE_POLL_H
+#define _FAKE_POLL_H
+
+#include <sys/errno.h>
+#include <string.h>
+#include <limits.h>
+#undef FD_SETSIZE
+#define FD_SETSIZE OPEN_MAX
+#include <sys/types.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+typedef struct pollfd {
+    int fd;                         /* file desc to poll */
+    short events;                   /* events of interest on fd */
+    short revents;                  /* events that occurred on fd */
+} pollfd_t;
+
+
+// poll flags
+#define POLLIN  0x0001
+#define POLLOUT 0x0004
+#define POLLERR 0x0008
+
+// synonyms
+#define POLLNORM POLLIN
+#define POLLPRI POLLIN
+#define POLLRDNORM POLLIN
+#define POLLRDBAND POLLIN
+#define POLLWRNORM POLLOUT
+#define POLLWRBAND POLLOUT
+
+// ignored
+#define POLLHUP 0x0010
+#define POLLNVAL 0x0020
+
+inline int poll(struct pollfd *pollSet, int pollCount, int pollTimeout)
+{
+    struct timeval      tv;
+    struct timeval      *tvp;
+    fd_set          readFDs, writeFDs, exceptFDs;
+    fd_set          *readp, *writep, *exceptp;
+    struct pollfd       *pollEnd, *p;
+    int             selected;
+    int             result;
+    int             maxFD;
+
+    if ( !pollSet )
+    {
+        pollEnd = NULL;
+        readp = NULL;
+        writep = NULL;
+        exceptp = NULL;
+        maxFD = 0;
+    }
+    else
+    {
+        pollEnd = pollSet + pollCount;
+        readp = &readFDs;
+        writep = &writeFDs;
+        exceptp = &exceptFDs;
+
+        FD_ZERO(readp);
+        FD_ZERO(writep);
+        FD_ZERO(exceptp);
+
+        // Find the biggest fd in the poll set
+        maxFD = 0;
+        for (p = pollSet; p < pollEnd; p++)
+        {
+            if (p->fd > maxFD)
+                maxFD = p->fd;
+        }
+
+        if (maxFD >= FD_SETSIZE)
+        {
+            // At least one fd is too big
+            errno = EINVAL;
+            return -1;
+        }
+
+        // Transcribe flags from the poll set to the fd sets
+        for (p = pollSet; p < pollEnd; p++)
+        {
+            if (p->fd < 0)
+            {
+                // Negative fd checks nothing and always reports zero
+            }
+            else
+            {
+                if (p->events & POLLIN)
+                    FD_SET(p->fd, readp);
+                if (p->events & POLLOUT)
+                    FD_SET(p->fd, writep);
+                if (p->events != 0)
+                    FD_SET(p->fd, exceptp);
+                // POLLERR is never set coming in; poll() always reports errors
+                // But don't report if we're not listening to anything at all.
+            }
+        }
+    }
+
+    // poll timeout is in milliseconds. Convert to struct timeval.
+    // poll timeout == -1 : wait forever : select timeout of NULL
+    // poll timeout == 0  : return immediately : select timeout of zero
+    if (pollTimeout >= 0)
+    {
+        tv.tv_sec = pollTimeout / 1000;
+        tv.tv_usec = (pollTimeout % 1000) * 1000;
+        tvp = &tv;
+    }
+    else
+    {
+        tvp = NULL;
+    }
+
+    selected = select(maxFD+1, readp, writep, exceptp, tvp);
+
+    if (selected < 0)
+    {
+        // Error during select
+        result = -1;
+    }
+    else if (selected > 0)
+    {
+        // Select found something
+        // Transcribe result from fd sets to poll set.
+        // Also count the number of selected fds. poll returns the
+        // number of ready fds; select returns the number of bits set.
+        int polled = 0;
+        for (p = pollSet; p < pollEnd; p++)
+        {
+            p->revents = 0;
+            if (p->fd < 0) {
+                // Negative fd always reports zero
+            }
+            else
+            {
+                if ( (p->events & POLLIN) && FD_ISSET(p->fd, readp) )
+                    p->revents |= POLLIN;
+                if ( (p->events & POLLOUT) && FD_ISSET(p->fd, writep) )
+                    p->revents |= POLLOUT;
+                if ( (p->events != 0) && FD_ISSET(p->fd, exceptp) )
+                    p->revents |= POLLERR;
+
+                if (p->revents)
+                    polled++;
+            }
+        }
+        result = polled;
+    }
+    else
+    {
+        // selected == 0, select timed out before anything happened
+        // Clear all result bits and return zero.
+        for (p = pollSet; p < pollEnd; p++)
+            p->revents = 0;
+
+        result = 0;
+    }
+
+    return result;
+}
+
+
+#undef FD_SETSIZE
+
+#endif