cdev-1.7.2n

extensions/cdevGenericServer/cdevReactor/cdevHandleSet.h

@@ -0,0 +1,87 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 1994,1995 Southeastern Universities Research Association,
+//                         Continuous Electron Beam Accelerator Facility
+//
+// This software was developed under a United States Government license
+// described in the NOTICE file included as part of this distribution.
+//
+//-----------------------------------------------------------------------------
+//
+// Description:
+//      File Descriptor Mask Class (Based On ACE Handler_Set)
+
+#ifndef _CDEV_HANDLE_SET_H_
+#define _CDEV_HANDLE_SET_H_
+
+#include <stdio.h>
+#include <string.h>
+#include "cdevPlatforms.h"
+
+class CDEV_REACTOR_API cdevHandleSet
+{
+friend class cdevHandleSetIterator;
+friend class cdevReactor;
+
+public:
+	cdevHandleSet (void);
+	cdevHandleSet (const fd_set &mask);
+
+	void reset     (void);
+	int  is_set    (int) const;
+	void set_bit   (int);
+	void clr_bit   (int);
+	int  num_set   (void) const;
+	int  max_set   (void) const;
+	int  asciiDump (FILE * fp = stdout);
+	void sync      (int max = FD_SETSIZE);
+
+	operator fd_set *( void ) { return &mask_; }
+
+private:
+	int	 size_;
+	int	 max_handle_;
+	fd_set   mask_;
+
+	enum	{
+		#ifdef _WIN32
+			MAX_SIZE  = FD_SETSIZE,
+		#else
+			MAX_SIZE  = NOFILE,
+			WORD_SIZE = NFDBITS,
+			NUM_WORDS = howmany (NOFILE, NFDBITS),
+			#ifdef __DECCXX
+				MSB_MASK	= ~(1U << (NFDBITS - 1))
+			#elif defined(CDEV_HAS_64BIT_LONGS)
+				MSB_MASK	= ~(1UL << (NFDBITS - 1))
+			#else
+				MSB_MASK	= ~(1 << (NFDBITS - 1))
+			#endif
+		#endif
+		};
+
+	int  count_bits (unsigned long n) const;
+	void set_max (int max);
+
+	static const char nbits_[256];
+};
+
+class CDEV_REACTOR_API cdevHandleSetIterator
+{
+public:
+	cdevHandleSetIterator (cdevHandleSet &);
+	int  operator ()(void);
+	void operator++ (void);
+
+private:
+	cdevHandleSet  &fds_;
+	int	  num_;
+
+	#ifdef _WIN32
+		unsigned int index_;
+	#else
+		int     index_;
+		fd_mask val_;
+	#endif
+};
+
+#endif /* _CDEV_HANDLE_SET_H_ */