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3e0ddf16 | 1 | /* |
5b74111a | 2 | * Copyright (C) 1996-2018 The Squid Software Foundation and contributors |
3e0ddf16 | 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. | |
3e0ddf16 AR |
7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 54 Interprocess Communication */ |
10 | ||
f7f3304a | 11 | #include "squid.h" |
a4555399 | 12 | #include "base/RunnersRegistry.h" |
602d9612 | 13 | #include "base/TextException.h" |
56f8aa50 | 14 | #include "ipc/mem/PagePool.h" |
3e0ddf16 | 15 | #include "ipc/mem/Pages.h" |
5bed43d6 | 16 | #include "tools.h" |
3e0ddf16 | 17 | |
56f8aa50 | 18 | // Uses a single PagePool instance, for now. |
3e0ddf16 | 19 | // Eventually, we may have pools dedicated to memory caching, disk I/O, etc. |
56f8aa50 DK |
20 | |
21 | // TODO: make pool id more unique so it does not conflict with other Squids? | |
a4555399 | 22 | static const char *PagePoolId = "squid-page-pool"; |
56f8aa50 | 23 | static Ipc::Mem::PagePool *ThePagePool = 0; |
ea2cdeb6 | 24 | static int TheLimits[Ipc::Mem::PageId::maxPurpose]; |
56f8aa50 | 25 | |
72261456 | 26 | // TODO: make configurable to avoid waste when mem-cached objects are small/big |
d1ad4017 | 27 | size_t |
9199139f AR |
28 | Ipc::Mem::PageSize() |
29 | { | |
72261456 | 30 | return 32*1024; |
56f8aa50 DK |
31 | } |
32 | ||
56f8aa50 | 33 | bool |
551f8a18 | 34 | Ipc::Mem::GetPage(const PageId::Purpose purpose, PageId &page) |
56f8aa50 | 35 | { |
551f8a18 | 36 | return ThePagePool && PagesAvailable(purpose) > 0 ? |
9199139f | 37 | ThePagePool->get(purpose, page) : false; |
56f8aa50 DK |
38 | } |
39 | ||
40 | void | |
41 | Ipc::Mem::PutPage(PageId &page) | |
42 | { | |
43 | Must(ThePagePool); | |
44 | ThePagePool->put(page); | |
45 | } | |
46 | ||
8ed94021 | 47 | char * |
56f8aa50 DK |
48 | Ipc::Mem::PagePointer(const PageId &page) |
49 | { | |
50 | Must(ThePagePool); | |
51 | return ThePagePool->pagePointer(page); | |
52 | } | |
72261456 AR |
53 | |
54 | size_t | |
e0bdae60 DK |
55 | Ipc::Mem::PageLimit() |
56 | { | |
551f8a18 DK |
57 | size_t limit = 0; |
58 | for (int i = 0; i < PageId::maxPurpose; ++i) | |
59 | limit += PageLimit(i); | |
60 | return limit; | |
e0bdae60 DK |
61 | } |
62 | ||
63 | size_t | |
551f8a18 | 64 | Ipc::Mem::PageLimit(const int purpose) |
72261456 | 65 | { |
ea2cdeb6 DK |
66 | Must(0 <= purpose && purpose <= PageId::maxPurpose); |
67 | return TheLimits[purpose]; | |
68 | } | |
69 | ||
70 | // note: adjust this if we start recording needs during reconfigure | |
71 | void | |
72 | Ipc::Mem::NotePageNeed(const int purpose, const int count) | |
73 | { | |
74 | Must(0 <= purpose && purpose <= PageId::maxPurpose); | |
75 | Must(count >= 0); | |
76 | TheLimits[purpose] += count; | |
e0bdae60 DK |
77 | } |
78 | ||
79 | size_t | |
80 | Ipc::Mem::PageLevel() | |
81 | { | |
551f8a18 | 82 | return ThePagePool ? ThePagePool->level() : 0; |
72261456 AR |
83 | } |
84 | ||
b940ff87 | 85 | size_t |
551f8a18 | 86 | Ipc::Mem::PageLevel(const int purpose) |
b940ff87 | 87 | { |
551f8a18 | 88 | return ThePagePool ? ThePagePool->level(purpose) : 0; |
b940ff87 | 89 | } |
a4555399 AR |
90 | |
91 | /// initializes shared memory pages | |
4404f1c5 | 92 | class SharedMemPagesRr: public Ipc::Mem::RegisteredRunner |
a4555399 AR |
93 | { |
94 | public: | |
95 | /* RegisteredRunner API */ | |
68353d5a | 96 | SharedMemPagesRr(): owner(NULL) {} |
21b7990f AR |
97 | virtual void useConfig(); |
98 | virtual void create(); | |
99 | virtual void open(); | |
c011f9bc | 100 | virtual ~SharedMemPagesRr(); |
68353d5a DK |
101 | |
102 | private: | |
103 | Ipc::Mem::PagePool::Owner *owner; | |
a4555399 AR |
104 | }; |
105 | ||
21b7990f | 106 | RunnerRegistrationEntry(SharedMemPagesRr); |
a4555399 | 107 | |
4404f1c5 | 108 | void |
21b7990f | 109 | SharedMemPagesRr::useConfig() |
a4555399 | 110 | { |
ea2cdeb6 | 111 | if (Ipc::Mem::PageLimit() <= 0) |
3f2ac0f7 | 112 | return; |
3f2ac0f7 | 113 | |
21b7990f | 114 | Ipc::Mem::RegisteredRunner::useConfig(); |
4404f1c5 | 115 | } |
68353d5a | 116 | |
4404f1c5 | 117 | void |
21b7990f | 118 | SharedMemPagesRr::create() |
4404f1c5 DK |
119 | { |
120 | Must(!owner); | |
121 | owner = Ipc::Mem::PagePool::Init(PagePoolId, Ipc::Mem::PageLimit(), | |
122 | Ipc::Mem::PageSize()); | |
123 | } | |
124 | ||
125 | void | |
21b7990f | 126 | SharedMemPagesRr::open() |
4404f1c5 | 127 | { |
68353d5a DK |
128 | Must(!ThePagePool); |
129 | ThePagePool = new Ipc::Mem::PagePool(PagePoolId); | |
a4555399 | 130 | } |
c011f9bc DK |
131 | |
132 | SharedMemPagesRr::~SharedMemPagesRr() | |
133 | { | |
134 | delete ThePagePool; | |
282ee641 | 135 | ThePagePool = NULL; |
68353d5a | 136 | delete owner; |
c011f9bc | 137 | } |
f53969cc | 138 |