Initial Commit:

- Create single library for all Core RedA functions/classes
- Working version

SelectCore.cpp

@@ -0,0 +1,123 @@
+/*
+ * Select.cpp
+ *
+ *  Created on: 13 May 2016
+ *      Author: wentzelc
+ */
+
+// redA Libraries
+#include "TimingCore.h"
+#include "SelectCore.h"
+
+// Standard C/C++ Libraries
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+//---------------------------------------------------------------------------
+
+// Select Variables
+fd_set      ReadTestFDS;
+fd_set      WriteTestFDS;
+fd_set      ReadFDS;
+fd_set      WriteFDS;
+int         MaxFD       = 0;
+timeval     SelectTime;
+
+//---------------------------------------------------------------------------
+
+// Clear Select File Descriptors
+void SelectClear()
+{
+    // Clear Select sets
+    FD_ZERO( &ReadTestFDS );
+    FD_ZERO( &WriteTestFDS );
+
+    // Reset maximum File Descriptor
+    MaxFD = 0;
+}
+//---------------------------------------------------------------------------
+
+// Set Select timeout
+void SelectConfig( long SelectTimeout )
+{
+    // Set Timeout
+    SetInterval( &SelectTime, SelectTimeout );
+}
+//---------------------------------------------------------------------------
+
+// Add Select File Descriptor
+void SelectAdd( int FD, bool Read, bool Write )
+{
+    // Add Read select
+    if (Read)
+        FD_SET( FD, &ReadTestFDS );
+
+    // Add Write Select
+    if (Write)
+        FD_SET( FD, &WriteTestFDS );
+
+    // Check Maximum File Handle
+    if (MaxFD <= FD)
+        MaxFD = FD+1;
+}
+//---------------------------------------------------------------------------
+
+void SelectRemove( int FD, bool Read, bool Write )
+{
+    // Remove from set for select read check
+    if (Read)
+        FD_CLR( FD, &ReadTestFDS);
+
+    // Remove from set for select write check
+    if (Write)
+        FD_CLR( FD, &WriteTestFDS);
+
+    // Check Maximum file handle
+    if (FD == MaxFD) {
+        for (int test = MaxFD-1; test >= 0; test--) {
+            if (FD_ISSET( test, &ReadTestFDS ) || FD_ISSET( test, &WriteTestFDS )) {
+                MaxFD = test+1;
+                break;
+            }
+        }
+    }
+}
+//---------------------------------------------------------------------------
+
+bool SelectTest()
+{
+    int     Result  = 0;
+
+    // Set Test sets
+    ReadFDS     = ReadTestFDS;
+    WriteFDS    = WriteTestFDS;
+
+    // Perform select
+    Result = select( MaxFD, &ReadFDS, &WriteFDS, (fd_set*)NULL, &SelectTime );
+    if (Result < 0)
+    {
+        printf( "Select operation failed (%s)\n", strerror(errno) );
+        return false;
+    }
+
+    // return success
+    return (bool)Result;
+}
+//---------------------------------------------------------------------------
+
+// Add Select File Descriptor
+bool SelectCheck( int FD, bool &Read, bool &Write )
+{
+    // Add Read select
+    Read = (bool)(FD_ISSET( FD, &ReadFDS ));
+
+    // Add Write Select
+    Write = (bool)(FD_ISSET( FD, &WriteFDS ));
+
+    return (Read || Write);
+}
+//---------------------------------------------------------------------------
+