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author | Mike Buland <eichlan@xagasoft.com> | 2011-01-10 21:04:17 +0000 |
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committer | Mike Buland <eichlan@xagasoft.com> | 2011-01-10 21:04:17 +0000 |
commit | 2ba3f84ab559da02a11aa000b3cecb3b3668af61 (patch) | |
tree | 266f450b512f607ec54d54af4fa8c13fdbe7ef91 /src/myriadfs.h | |
parent | ea18007633b31901f2ae275cc0576c3f7ce99fc9 (diff) | |
parent | 3611f253f6fdfa4954d374ab85ddaa7f799c130c (diff) | |
download | libbu++-2ba3f84ab559da02a11aa000b3cecb3b3668af61.tar.gz libbu++-2ba3f84ab559da02a11aa000b3cecb3b3668af61.tar.bz2 libbu++-2ba3f84ab559da02a11aa000b3cecb3b3668af61.tar.xz libbu++-2ba3f84ab559da02a11aa000b3cecb3b3668af61.zip |
Merged in the core branch. This is a major update that fixes many things, and
changes many others, including source files that were deleted and renamed.
Before doing this update, I reccomend a full clean, or even a fresh checkout.
Things to note, most outstanding about this update:
- Bu::Socket was changed to Bu::TcpSocket and the default mode is blocking.
- All templatized container classes are SharedCore now, which is good, but
SharedCore is inherently non-reentrant safe. However, all SharedCore classes
have a "clone" function that return a non-shared copy of the object, safe for
passing into a reentrant safe function accessing shared memory.
Diffstat (limited to 'src/myriadfs.h')
-rw-r--r-- | src/myriadfs.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/myriadfs.h b/src/myriadfs.h new file mode 100644 index 0000000..42a3493 --- /dev/null +++ b/src/myriadfs.h | |||
@@ -0,0 +1,54 @@ | |||
1 | #ifndef MYRIAD_FS_H | ||
2 | #define MYRIAD_FS_H | ||
3 | |||
4 | #include "bu/myriad.h" | ||
5 | |||
6 | namespace Bu | ||
7 | { | ||
8 | class Stream; | ||
9 | |||
10 | subExceptionDecl( MyriadFsException ); | ||
11 | |||
12 | /** | ||
13 | * A POSIX compliant, node based filesystem built on top of Myriad. | ||
14 | * | ||
15 | * A header is placed into stream 1. | ||
16 | * Header format: | ||
17 | * int32_t iMagicHeader (A7188B39) | ||
18 | * int8_t iVersion (1) | ||
19 | * int32_t iNodeSize | ||
20 | * int32_t iNumNodes | ||
21 | * NodeLookup[iNumNodes] nNode | ||
22 | * | ||
23 | * Node lookup: | ||
24 | * int32_t iInode | ||
25 | * int32_t iPosition | ||
26 | * | ||
27 | * The node headers or inode structures have a base size of 22 bytes. | ||
28 | * Everything else in the block is used for the name. I.e. if you have | ||
29 | * a blocksize of 512 bytes then you wind up with a max name size of | ||
30 | * 512-22=490 characters, or a blocksize of 256 gives you 234 chraacters | ||
31 | * as a max. The node headers are all stored in stream 2. | ||
32 | * Basic node header format: | ||
33 | * int32_t iUser | ||
34 | * int32_t iGroup | ||
35 | * int16_t iMeta | ||
36 | * int16_t iPerms | ||
37 | * int32_t iStreamIndex | ||
38 | * int32_t iParentNode | ||
39 | * int16_t iNameSize | ||
40 | * char[iNameSize] sName | ||
41 | */ | ||
42 | class MyriadFs | ||
43 | { | ||
44 | public: | ||
45 | MyriadFs( Bu::Stream &rStore, int iBlockSize=512 ); | ||
46 | virtual ~MyriadFs(); | ||
47 | |||
48 | private: | ||
49 | Bu::Stream &rStore; | ||
50 | Bu::Myriad mStore; | ||
51 | }; | ||
52 | }; | ||
53 | |||
54 | #endif | ||