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528b2c61 | 1 | |
2 | /* | |
42a503bd | 3 | * $Id: stmem.h,v 1.4 2003/06/26 12:51:57 robertc Exp $ |
528b2c61 | 4 | * |
5 | * | |
6 | * SQUID Web Proxy Cache http://www.squid-cache.org/ | |
7 | * ---------------------------------------------------------- | |
8 | * | |
9 | * Squid is the result of efforts by numerous individuals from | |
10 | * the Internet community; see the CONTRIBUTORS file for full | |
11 | * details. Many organizations have provided support for Squid's | |
12 | * development; see the SPONSORS file for full details. Squid is | |
13 | * Copyrighted (C) 2001 by the Regents of the University of | |
14 | * California; see the COPYRIGHT file for full details. Squid | |
15 | * incorporates software developed and/or copyrighted by other | |
16 | * sources; see the CREDITS file for full details. | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or modify | |
19 | * it under the terms of the GNU General Public License as published by | |
20 | * the Free Software Foundation; either version 2 of the License, or | |
21 | * (at your option) any later version. | |
22 | * | |
23 | * This program is distributed in the hope that it will be useful, | |
24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
26 | * GNU General Public License for more details. | |
27 | * | |
28 | * You should have received a copy of the GNU General Public License | |
29 | * along with this program; if not, write to the Free Software | |
30 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
31 | * | |
42a503bd | 32 | * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org> |
528b2c61 | 33 | */ |
34 | ||
35 | #ifndef SQUID_STMEM_H | |
36 | #define SQUID_STMEM_H | |
37 | ||
4c50505b | 38 | #include "splay.h" |
39 | #include "Range.h" | |
40 | ||
528b2c61 | 41 | class mem_node; |
62e76326 | 42 | |
528b2c61 | 43 | class StoreIOBuffer; |
62e76326 | 44 | |
45 | class mem_hdr | |
46 | { | |
47 | ||
528b2c61 | 48 | public: |
4c50505b | 49 | mem_hdr(); |
50 | ~mem_hdr(); | |
528b2c61 | 51 | void freeContent(); |
52 | int lowestOffset () const; | |
53 | off_t endOffset () const; | |
54 | int freeDataUpto (int); | |
55 | ssize_t copy (off_t, char *, size_t) const; | |
4c50505b | 56 | bool hasContigousContentRange(Range<size_t> const &range) const; |
528b2c61 | 57 | /* success or fail */ |
58 | bool write (StoreIOBuffer const &); | |
42a503bd | 59 | void dump() const; |
60 | size_t size() const; | |
61 | /* Not an iterator - thus the start, not begin() */ | |
62 | mem_node const *start() const; | |
63 | mem_node *getBlockContainingLocation (size_t location) const; | |
528b2c61 | 64 | |
65 | /* Only for use of MemObject */ | |
66 | void internalAppend(const char *data, int len); | |
42a503bd | 67 | |
68 | static SplayNode<mem_node *>::SPLAYCMP NodeCompare; | |
62e76326 | 69 | |
528b2c61 | 70 | private: |
42a503bd | 71 | void unlink(mem_node *aNode); |
528b2c61 | 72 | void makeAppendSpace(); |
73 | int appendToNode(mem_node *aNode, const char *data, int maxLength); | |
74 | void appendNode (mem_node *aNode); | |
528b2c61 | 75 | size_t copyAvailable(mem_node *aNode, size_t location, size_t amount, char *target) const; |
76 | bool unionNotEmpty (StoreIOBuffer const &); | |
528b2c61 | 77 | mem_node *nodeToRecieve(off_t offset); |
78 | size_t writeAvailable(mem_node *aNode, size_t location, size_t amount, char const *source); | |
79 | off_t inmem_hi; | |
42a503bd | 80 | Splay<mem_node *> nodes; |
528b2c61 | 81 | }; |
82 | ||
83 | #endif /* SQUID_STMEM_H */ |