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author | Mike Buland <mike@xagasoft.com> | 2024-08-27 13:37:36 -0700 |
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committer | Mike Buland <mike@xagasoft.com> | 2024-08-27 13:37:36 -0700 |
commit | f1e3f25d9b7a12cdedb99e4cb0bfa66157a1a972 (patch) | |
tree | c8414b8040cdcd38bd98471d96a01908cdef49ad /src/unstable/myriadcache.h | |
parent | caee572ff94822ca2ed354fcb79ca04ed9adf388 (diff) | |
download | libbu++-f1e3f25d9b7a12cdedb99e4cb0bfa66157a1a972.tar.gz libbu++-f1e3f25d9b7a12cdedb99e4cb0bfa66157a1a972.tar.bz2 libbu++-f1e3f25d9b7a12cdedb99e4cb0bfa66157a1a972.tar.xz libbu++-f1e3f25d9b7a12cdedb99e4cb0bfa66157a1a972.zip |
Making progress.
Diffstat (limited to 'src/unstable/myriadcache.h')
-rw-r--r-- | src/unstable/myriadcache.h | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/src/unstable/myriadcache.h b/src/unstable/myriadcache.h deleted file mode 100644 index 24002b0..0000000 --- a/src/unstable/myriadcache.h +++ /dev/null | |||
@@ -1,140 +0,0 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2007-2023 Xagasoft, All rights reserved. | ||
3 | * | ||
4 | * This file is part of the libbu++ library and is released under the | ||
5 | * terms of the license contained in the file LICENSE. | ||
6 | */ | ||
7 | |||
8 | #ifndef BU_MYRIAD_CACHE_H | ||
9 | #define BU_MYRIAD_CACHE_H | ||
10 | |||
11 | #include "bu/cachebase.h" | ||
12 | #include "bu/myriad.h" | ||
13 | #include "bu/myriadstream.h" | ||
14 | #include "bu/file.h" | ||
15 | #include "bu/streamstack.h" | ||
16 | |||
17 | namespace Bu | ||
18 | { | ||
19 | template<typename keytype, typename obtype> | ||
20 | class MyriadCache : public Bu::CacheBase<keytype, obtype> | ||
21 | { | ||
22 | public: | ||
23 | MyriadCache( Bu::Stream &sStore, int iBlockSize=512, int iPreallocate=8 ) : | ||
24 | sStore( sStore ), | ||
25 | mStore( sStore, iBlockSize, iPreallocate ), | ||
26 | bStructureChanged( false ) | ||
27 | { | ||
28 | try | ||
29 | { | ||
30 | Bu::ReadWriteMutex::ReadLocker l( rwStore ); | ||
31 | Bu::MyriadStream ms = mStore.openStream( 1 ); | ||
32 | Bu::Archive ar( ms, Bu::Archive::load ); | ||
33 | uint8_t uVer; | ||
34 | ar >> uVer; | ||
35 | switch( uVer ) | ||
36 | { | ||
37 | case 0: | ||
38 | ar >> hIndex; | ||
39 | break; | ||
40 | } | ||
41 | } | ||
42 | catch(...) | ||
43 | { | ||
44 | if( mStore.createStreamWithId( 1 ) != 1 ) | ||
45 | throw Bu::ExceptionBase("Error creating index stream."); | ||
46 | |||
47 | _sync(); | ||
48 | } | ||
49 | } | ||
50 | |||
51 | virtual ~MyriadCache() | ||
52 | { | ||
53 | Bu::CacheBase<keytype,obtype>::sync(); | ||
54 | } | ||
55 | |||
56 | using typename Bu::CacheBase<keytype,obtype>::KeyList; | ||
57 | using typename Bu::CacheBase<keytype,obtype>::ObjectType; | ||
58 | |||
59 | virtual typename Bu::CacheBase<keytype,obtype>::KeyList getKeys() const | ||
60 | { | ||
61 | Bu::ReadWriteMutex::ReadLocker rl( rwStore ); | ||
62 | return hIndex.getKeys(); | ||
63 | } | ||
64 | |||
65 | virtual int getSize() const | ||
66 | { | ||
67 | Bu::ReadWriteMutex::ReadLocker rl( rwStore ); | ||
68 | return hIndex.getSize(); | ||
69 | } | ||
70 | |||
71 | protected: | ||
72 | virtual bool _has( const keytype &key ) | ||
73 | { | ||
74 | Bu::ReadWriteMutex::ReadLocker rl( rwStore ); | ||
75 | return hIndex.has( key ); | ||
76 | } | ||
77 | |||
78 | virtual void _create( const obtype *o ) | ||
79 | { | ||
80 | Bu::ReadWriteMutex::WriteLocker wl( rwStore ); | ||
81 | hIndex.insert( o->getKey(), mStore.createStream() ); | ||
82 | _save( o ); | ||
83 | |||
84 | bStructureChanged = true; | ||
85 | } | ||
86 | |||
87 | virtual void _erase( const keytype &k ) | ||
88 | { | ||
89 | Bu::ReadWriteMutex::WriteLocker wl( rwStore ); | ||
90 | mStore.deleteStream( hIndex.get( k ) ); | ||
91 | hIndex.erase( k ); | ||
92 | |||
93 | bStructureChanged = true; | ||
94 | } | ||
95 | |||
96 | virtual obtype *_load( | ||
97 | typename Bu::CacheObject<keytype, obtype>::Initializer &initObj, | ||
98 | const keytype &k | ||
99 | ) | ||
100 | { | ||
101 | Bu::MyriadStream ms = mStore.openStream( hIndex.get( k ) ); | ||
102 | return _cacheObjectLoad<keytype, obtype>( initObj, k, ms ); | ||
103 | } | ||
104 | |||
105 | virtual void _save( const obtype *o ) | ||
106 | { | ||
107 | Bu::MyriadStream ms = mStore.openStream( hIndex.get( o->getKey() ) ); | ||
108 | _cacheObjectSave( ms, o ); | ||
109 | ms.setSize( ms.tell() ); | ||
110 | |||
111 | mStore.sync(); | ||
112 | } | ||
113 | |||
114 | virtual void _sync() | ||
115 | { | ||
116 | Bu::ReadWriteMutex::WriteLocker wl( rwStore ); | ||
117 | if( !bStructureChanged ) | ||
118 | return; | ||
119 | |||
120 | Bu::MyriadStream ms = mStore.openStream( 1 ); | ||
121 | Bu::Archive ar( ms, Bu::Archive::save ); | ||
122 | ar << (uint8_t)0 << hIndex; | ||
123 | ar.close(); | ||
124 | ms.setSize( ms.tell() ); | ||
125 | |||
126 | bStructureChanged = false; | ||
127 | |||
128 | mStore.sync(); | ||
129 | } | ||
130 | |||
131 | private: | ||
132 | Bu::Stream &sStore; | ||
133 | Bu::Myriad mStore; | ||
134 | Bu::Hash<keytype, int> hIndex; | ||
135 | mutable Bu::ReadWriteMutex rwStore; | ||
136 | bool bStructureChanged; | ||
137 | }; | ||
138 | } | ||
139 | |||
140 | #endif | ||