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Changes In Branch memjournal-exp Excluding Merge-Ins
This is equivalent to a diff from 1d9468d2 to d99ac415
2016-03-08
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17:59 | In memjournal.c, reuse the same sqlite3_file object for both the in-memory phase and the on-disk phase. (check-in: e7fbbdc2 user: drh tags: trunk) | |
17:44 | Modify the memjournal.c code to make it a bit smaller. (Closed-Leaf check-in: d99ac415 user: dan tags: memjournal-exp) | |
16:02 | Remove an unused goto label in the RBU extension. (check-in: 2179a106 user: drh tags: trunk) | |
15:52 | Add a new row type to RBU (a peer of insert, update and delete) - "delete then insert". (check-in: 1d9468d2 user: dan tags: trunk) | |
15:47 | Add the SQLITE_DEFAULT_SYNCHRONOUS and SQLITE_DEFAULT_WAL_SYNCHRONOUS compile-time options. Automatically switch to the WAL_SYNCHRONOUS setting when first opening a WAL-mode database if the synchronous setting has not been previously set by the application. (check-in: 5a847a67 user: drh tags: trunk) | |
2016-03-07
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17:39 | Add a new row type to RBU (a peer of insert, update and delete) - "delete then insert". (Closed-Leaf check-in: 169311c8 user: dan tags: rbu-delete-then-insert) | |
Changes to src/memjournal.c.
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65 66 67 68 69 70 71 | FileChunk *pFirst; /* Head of in-memory chunk-list */ FilePoint endpoint; /* Pointer to the end of the file */ FilePoint readpoint; /* Pointer to the end of the last xRead() */ int flags; /* xOpen flags */ sqlite3_vfs *pVfs; /* The "real" underlying VFS */ const char *zJournal; /* Name of the journal file */ | < < < | | 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | FileChunk *pFirst; /* Head of in-memory chunk-list */ FilePoint endpoint; /* Pointer to the end of the file */ FilePoint readpoint; /* Pointer to the end of the last xRead() */ int flags; /* xOpen flags */ sqlite3_vfs *pVfs; /* The "real" underlying VFS */ const char *zJournal; /* Name of the journal file */ }; /* ** Read data from the in-memory journal file. This is the implementation ** of the sqlite3_vfs.xRead method. */ static int memjrnlRead( sqlite3_file *pJfd, /* The journal file from which to read */ void *zBuf, /* Put the results here */ int iAmt, /* Number of bytes to read */ sqlite_int64 iOfst /* Begin reading at this offset */ ){ MemJournal *p = (MemJournal *)pJfd; if( (iAmt+iOfst)>p->endpoint.iOffset ){ return SQLITE_IOERR_SHORT_READ; }else{ u8 *zOut = zBuf; int nRead = iAmt; int iChunkOffset; FileChunk *pChunk; |
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134 135 136 137 138 139 140 | p->pFirst = 0; } /* ** Flush the contents of memory to a real file on disk. */ static int memjrnlCreateFile(MemJournal *p){ | | < | > | > > | | | | < | | | | | | | | | > > > > > | | | | | | | < < < < < < < < < < | > | | | 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | p->pFirst = 0; } /* ** Flush the contents of memory to a real file on disk. */ static int memjrnlCreateFile(MemJournal *p){ int rc; sqlite3_file *pReal = (sqlite3_file*)p; MemJournal copy = *p; memset(p, 0, sizeof(MemJournal)); rc = sqlite3OsOpen(copy.pVfs, copy.zJournal, pReal, copy.flags, 0); if( rc==SQLITE_OK ){ int nChunk = copy.nChunkSize; i64 iOff = 0; FileChunk *pIter; for(pIter=copy.pFirst; pIter && rc==SQLITE_OK; pIter=pIter->pNext){ int nWrite = nChunk; if( pIter==copy.endpoint.pChunk ){ nWrite = copy.endpoint.iOffset % copy.nChunkSize; if( nWrite==0 ) nWrite = copy.nChunkSize; } rc = sqlite3OsWrite(pReal, (u8*)pIter->zChunk, nWrite, iOff); iOff += nWrite; } if( rc==SQLITE_OK ){ /* No error has occurred. Free the in-memory buffers. */ memjrnlFreeChunks(©); } } if( rc!=SQLITE_OK ){ /* If an error occurred while creating or writing to the file, restore ** the original before returning. This way, SQLite uses the in-memory ** journal data to roll back changes made to the internal page-cache ** before this function was called. */ sqlite3OsClose(pReal); *p = copy; } return rc; } /* ** Write data to the file. */ static int memjrnlWrite( sqlite3_file *pJfd, /* The journal file into which to write */ const void *zBuf, /* Take data to be written from here */ int iAmt, /* Number of bytes to write */ sqlite_int64 iOfst /* Begin writing at this offset into the file */ ){ MemJournal *p = (MemJournal *)pJfd; int nWrite = iAmt; u8 *zWrite = (u8 *)zBuf; /* If the file should be created now, create it and write the new data ** into the file on disk. */ if( p->nSpill>0 && (iAmt+iOfst)>p->nSpill ){ int rc = memjrnlCreateFile(p); if( rc==SQLITE_OK ){ rc = sqlite3OsWrite(pJfd, zBuf, iAmt, iOfst); } return rc; } /* If the contents of this write should be stored in memory */ else{ /* An in-memory journal file should only ever be appended to. Random |
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251 252 253 254 255 256 257 | ** ** If the journal file is already on disk, truncate it there. Or, if it ** is still in main memory but is being truncated to zero bytes in size, ** ignore */ static int memjrnlTruncate(sqlite3_file *pJfd, sqlite_int64 size){ MemJournal *p = (MemJournal *)pJfd; | < < | < < < | < < < < | 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 | ** ** If the journal file is already on disk, truncate it there. Or, if it ** is still in main memory but is being truncated to zero bytes in size, ** ignore */ static int memjrnlTruncate(sqlite3_file *pJfd, sqlite_int64 size){ MemJournal *p = (MemJournal *)pJfd; if( size==0 ){ memjrnlFreeChunks(p); p->nSize = 0; p->endpoint.pChunk = 0; p->endpoint.iOffset = 0; p->readpoint.pChunk = 0; p->readpoint.iOffset = 0; } return SQLITE_OK; } /* ** Close the file. */ static int memjrnlClose(sqlite3_file *pJfd){ MemJournal *p = (MemJournal *)pJfd; memjrnlFreeChunks(p); return SQLITE_OK; } /* ** Sync the file. ** ** If the real file has been created, call its xSync method. Otherwise, ** syncing an in-memory journal is a no-op. */ static int memjrnlSync(sqlite3_file *pJfd, int flags){ UNUSED_PARAMETER2(pJfd, flags); return SQLITE_OK; } /* ** Query the size of the file in bytes. */ static int memjrnlFileSize(sqlite3_file *pJfd, sqlite_int64 *pSize){ MemJournal *p = (MemJournal *)pJfd; *pSize = (sqlite_int64) p->endpoint.iOffset; return SQLITE_OK; } /* ** Table of methods for MemJournal sqlite3_file object. */ |
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350 351 352 353 354 355 356 | ){ MemJournal *p = (MemJournal*)pJfd; /* Zero the file-handle object. If nSpill was passed zero, initialize ** it using the sqlite3OsOpen() function of the underlying VFS. In this ** case none of the code in this module is executed as a result of calls ** made on the journal file-handle. */ | | | 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 | ){ MemJournal *p = (MemJournal*)pJfd; /* Zero the file-handle object. If nSpill was passed zero, initialize ** it using the sqlite3OsOpen() function of the underlying VFS. In this ** case none of the code in this module is executed as a result of calls ** made on the journal file-handle. */ memset(p, 0, sizeof(MemJournal)); if( nSpill==0 ){ return sqlite3OsOpen(pVfs, zName, pJfd, flags, 0); } if( nSpill>0 ){ p->nChunkSize = nSpill; }else{ |
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399 400 401 402 403 404 405 | /* ** The file-handle passed as the only argument is open on a journal file. ** Return true if this "journal file" is currently stored in heap memory, ** or false otherwise. */ int sqlite3JournalIsInMemory(sqlite3_file *p){ | | | | 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 | /* ** The file-handle passed as the only argument is open on a journal file. ** Return true if this "journal file" is currently stored in heap memory, ** or false otherwise. */ int sqlite3JournalIsInMemory(sqlite3_file *p){ return p->pMethods==&MemJournalMethods; } /* ** Return the number of bytes required to store a JournalFile that uses vfs ** pVfs to create the underlying on-disk files. */ int sqlite3JournalSize(sqlite3_vfs *pVfs){ return MAX(pVfs->szOsFile, sizeof(MemJournal)); } |