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6039b729 | 1 | |
2 | /* | |
d1fab16b | 3 | * $Id: CommRead.h,v 1.9 2008/02/12 23:51:37 rousskov Exp $ |
6039b729 | 4 | * |
507d0a78 | 5 | * DEBUG: section 5 Comms |
6039b729 | 6 | * AUTHOR: Robert Collins <robertc@squid-cache.org> |
7 | * | |
8 | * SQUID Web Proxy Cache http://www.squid-cache.org/ | |
9 | * ---------------------------------------------------------- | |
10 | * | |
11 | * Squid is the result of efforts by numerous individuals from | |
12 | * the Internet community; see the CONTRIBUTORS file for full | |
13 | * details. Many organizations have provided support for Squid's | |
14 | * development; see the SPONSORS file for full details. Squid is | |
15 | * Copyrighted (C) 2001 by the Regents of the University of | |
16 | * California; see the COPYRIGHT file for full details. Squid | |
17 | * incorporates software developed and/or copyrighted by other | |
18 | * sources; see the CREDITS file for full details. | |
19 | * | |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | * | |
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | * You should have received a copy of the GNU General Public License | |
31 | * along with this program; if not, write to the Free Software | |
32 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
33 | * | |
34 | * | |
35 | * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org> | |
36 | */ | |
37 | ||
38 | #include "config.h" | |
39 | ||
40 | #ifndef COMMREAD_H | |
41 | #define COMMREAD_H | |
42 | ||
43 | #include "squid.h" | |
a553a5a3 | 44 | #include "comm.h" |
d1fab16b | 45 | #include "CommCalls.h" |
6039b729 | 46 | #include "List.h" |
47 | ||
48 | class CommRead | |
49 | { | |
50 | ||
51 | public: | |
52 | CommRead (); | |
d1fab16b | 53 | CommRead (int fd, char *buf, int len, AsyncCall::Pointer &callback); |
2d8c0b1a | 54 | void queueCallback(size_t retval, comm_err_t errcode, int xerrno); |
55 | bool hasCallback() const; | |
56 | void hasCallbackInvariant() const; | |
57 | void hasNoCallbackInvariant() const; | |
58 | void tryReading(); | |
59 | void read(); | |
60 | void initiateActualRead(); | |
2d8c0b1a | 61 | void doCallback(comm_err_t errcode, int xerrno); |
6039b729 | 62 | int fd; |
63 | char *buf; | |
64 | int len; | |
d1fab16b | 65 | AsyncCall::Pointer callback; |
2d8c0b1a | 66 | static void ReadTry(int fd, void *data); |
6039b729 | 67 | }; |
68 | ||
69 | class DeferredRead | |
70 | { | |
71 | ||
72 | public: | |
73 | typedef void DeferrableRead(void *context, CommRead const &); | |
6039b729 | 74 | DeferredRead (); |
75 | DeferredRead (DeferrableRead *, void *, CommRead const &); | |
76 | void markCancelled(); | |
77 | DeferrableRead *theReader; | |
78 | void *theContext; | |
79 | CommRead theRead; | |
80 | bool cancelled; | |
81 | ||
82 | private: | |
6039b729 | 83 | }; |
84 | ||
85 | class DeferredReadManager | |
86 | { | |
87 | ||
88 | public: | |
89 | ~DeferredReadManager(); | |
90 | void delayRead(DeferredRead const &); | |
91 | void kickReads(int const count); | |
92 | ||
93 | private: | |
94 | static PF CloseHandler; | |
95 | static DeferredRead popHead(ListContainer<DeferredRead> &deferredReads); | |
96 | void kickARead(DeferredRead const &); | |
97 | void flushReads(); | |
98 | ListContainer<DeferredRead> deferredReads; | |
99 | }; | |
100 | ||
101 | ||
102 | #endif /* COMMREAD_H */ |