Security-57031.1.35.tar.gz

[apple/security.git] / libsecurity_utilities / lib / fdsel.h

diff --git a/libsecurity_utilities/lib/fdsel.h b/libsecurity_utilities/lib/fdsel.h
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index 87056b1..0000000
--- a/libsecurity_utilities/lib/fdsel.h
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (c) 2000-2001,2003-2004 Apple Computer, Inc. All Rights Reserved.
- * 
- * @APPLE_LICENSE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-//
-// fdsel - select-style file descriptor set management
-//
-#ifndef _H_FDSEL
-#define _H_FDSEL
-
-#include <security_utilities/utilities.h>
-#include <sys/types.h>
-#include <security_utilities/debugging.h>
-
-
-namespace Security {
-namespace UnixPlusPlus {
-
-
-//
-// An FDSet object maintains a single select(2) compatible bitmap.
-// Size is implicitly kept by the caller (who needs to call grow() as
-// needed, starting at zero). As long as this is done correctly, we are
-// not bound by the FD_SETSIZE limit.
-// An FDSet can self-copy for select(2) use; after that, the [] operator
-// investigates the copy.
-//
-// Why are we using the FD_* macros even though we know these
-// are fd_mask arrays? Some implementations use optimized assembly
-// for these operations, and we want to pick those up.
-//
-// This whole mess is completely UNIX specific. If your system has
-// the poll(2) system call, ditch this and use it.
-//
-class FDSet {
-public:
-    FDSet() : mBits(NULL), mUseBits(NULL) { }
-    ~FDSet();
-
-    void grow(int oldWords, int newWords);
-    void set(int fd, bool on);
-    
-    fd_set *make(int words);
-    bool operator [] (int fd) const    { return FD_ISSET(fd, (fd_set *)mUseBits); }
-    
-    inline static int words(int fd)    { return (fd - 1) / NFDBITS + 1; }
-
-private:
-    fd_mask *mBits;                                    // base bits
-    fd_mask *mUseBits;                         // mutable copy for select(2)
-    
-    void grow(fd_mask * &bits, int oldWords, int newWords);
-};
-
-
-}      // end namespace UnixPlusPlus
-}      // end namespace Security
-
-
-#endif //_H_FDSEL