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git.ipfire.org Git - thirdparty/squid.git/blob - src/ipc/mem/FlexibleArray.h
2 * Copyright (C) 1996-2017 The Squid Software Foundation and contributors
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
9 #ifndef SQUID_IPC_MEM_FLEXIBLE_ARRAY_H
10 #define SQUID_IPC_MEM_FLEXIBLE_ARRAY_H
12 // sometimes required for placement-new operator to be declared
21 /// A "flexible array" of Items inside some shared memory space.
22 /// A portable equivalent of a "Item items[];" data member.
23 /// Some compilers such as Clang can only handle flexible arrays of PODs,
24 /// and the current C++ standard does not allow flexible arrays at all.
29 explicit FlexibleArray(const int capacity
) {
30 if (capacity
> 1) // the first item is initialized automatically
31 new (raw()+1) Item
[capacity
-1];
34 Item
&operator [](const int idx
) { return items
[idx
]; }
35 const Item
&operator [](const int idx
) const { return items
[idx
]; }
37 //const Item *operator ()() const { return items; }
38 //Item *operator ()() { return items; }
40 Item
*raw() { return items
; }
43 Item items
[1]; // ensures proper alignment of array elements
50 #endif /* SQUID_IPC_MEM_FLEXIBLE_ARRAY_H */