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Commit | Line | Data |
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1ff991dc | 1 | /* |
bf95c10a | 2 | * Copyright (C) 1996-2022 The Squid Software Foundation and contributors |
1ff991dc | 3 | * |
bbc27441 AJ |
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. | |
1ff991dc AJ |
7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 05 Disk I/O pipe manager */ |
10 | ||
1ff991dc | 11 | #include "squid.h" |
4194402d | 12 | #include "comm/Loops.h" |
1ff991dc | 13 | #include "DiskIO/DiskThreads/CommIO.h" |
c4ad1349 | 14 | #include "fd.h" |
582c2af2 | 15 | #include "globals.h" |
1e1a9021 | 16 | #include "win32.h" |
1ff991dc AJ |
17 | |
18 | void | |
1564ff62 | 19 | CommIO::Initialize() |
1ff991dc | 20 | { |
1564ff62 | 21 | if (CommIO::Initialized) |
45bb0381 AJ |
22 | return; |
23 | ||
1ff991dc AJ |
24 | /* Initialize done pipe signal */ |
25 | int DonePipe[2]; | |
26 | if (pipe(DonePipe)) {} | |
27 | DoneFD = DonePipe[1]; | |
28 | DoneReadFD = DonePipe[0]; | |
45bb0381 AJ |
29 | fd_open(DoneReadFD, FD_PIPE, "async-io completion event: main"); |
30 | fd_open(DoneFD, FD_PIPE, "async-io completion event: threads"); | |
1ff991dc AJ |
31 | commSetNonBlocking(DoneReadFD); |
32 | commSetNonBlocking(DoneFD); | |
aee3523a | 33 | Comm::SetSelect(DoneReadFD, COMM_SELECT_READ, NULLFDHandler, nullptr, 0); |
1564ff62 | 34 | Initialized = true; |
1ff991dc AJ |
35 | } |
36 | ||
37 | void | |
38 | CommIO::NotifyIOClose() | |
39 | { | |
40 | /* Close done pipe signal */ | |
41 | FlushPipe(); | |
42 | close(DoneFD); | |
43 | close(DoneReadFD); | |
44 | fd_close(DoneFD); | |
45 | fd_close(DoneReadFD); | |
1564ff62 | 46 | Initialized = false; |
1ff991dc AJ |
47 | } |
48 | ||
1564ff62 | 49 | bool CommIO::Initialized = false; |
1ff991dc AJ |
50 | bool CommIO::DoneSignalled = false; |
51 | int CommIO::DoneFD = -1; | |
52 | int CommIO::DoneReadFD = -1; | |
53 | ||
54 | void | |
55 | CommIO::FlushPipe() | |
56 | { | |
57 | char buf[256]; | |
58 | FD_READ_METHOD(DoneReadFD, buf, sizeof(buf)); | |
59 | } | |
60 | ||
61 | void | |
ced8def3 | 62 | CommIO::NULLFDHandler(int fd, void *) |
1ff991dc AJ |
63 | { |
64 | FlushPipe(); | |
aee3523a | 65 | Comm::SetSelect(fd, COMM_SELECT_READ, NULLFDHandler, nullptr, 0); |
1ff991dc AJ |
66 | } |
67 | ||
68 | void | |
69 | CommIO::ResetNotifications() | |
70 | { | |
71 | if (DoneSignalled) { | |
72 | FlushPipe(); | |
73 | DoneSignalled = false; | |
74 | } | |
75 | } | |
f53969cc | 76 |