119 static unsigned testpcacheRandom(testpcache *p){  in testpcacheRandom()  argument
123     p->iRand = (p->iRand*69069 + 5);  in testpcacheRandom()
124     x = (x<<8) | ((p->iRand>>16)&0xff);  in testpcacheRandom()
140   testpcache *p;  in testpcacheCreate()  local
145   p = sqlite3_malloc( nMem );  in testpcacheCreate()
146   if( p==0 ) return 0;  in testpcacheCreate()
147   x = (char*)&p[1];  in testpcacheCreate()
148   p->szPage = szPage;  in testpcacheCreate()
149   p->szExtra = szExtra;  in testpcacheCreate()
150   p->nFree = TESTPCACHE_NPAGE;  in testpcacheCreate()
151   p->nPinned = 0;  in testpcacheCreate()
152   p->iRand = testpcacheGlobal.prngSeed;  in testpcacheCreate()
153   p->bPurgeable = bPurgeable;  in testpcacheCreate()
154   p->iMagic = TESTPCACHE_VALID;  in testpcacheCreate()
156     p->a[i].key = 0;  in testpcacheCreate()
157     p->a[i].isPinned = 0;  in testpcacheCreate()
158     p->a[i].page.pBuf = (void*)x;  in testpcacheCreate()
159     p->a[i].page.pExtra = (void*)&x[szPage];  in testpcacheCreate()
162   return (sqlite3_pcache*)p;  in testpcacheCreate()
169   testpcache *p = (testpcache*)pCache;  in testpcacheCachesize()  local
170   assert( p->iMagic==TESTPCACHE_VALID );  in testpcacheCachesize()
180   testpcache *p = (testpcache*)pCache;  in testpcachePagecount()  local
181   assert( p->iMagic==TESTPCACHE_VALID );  in testpcachePagecount()
184   return TESTPCACHE_NPAGE - p->nFree;  in testpcachePagecount()
195   testpcache *p = (testpcache*)pCache;  in testpcacheFetch()  local
197   assert( p->iMagic==TESTPCACHE_VALID );  in testpcacheFetch()
203     if( p->a[i].key==key ){  in testpcacheFetch()
204       if( !p->a[i].isPinned ){  in testpcacheFetch()
205         p->nPinned++;  in testpcacheFetch()
206         assert( p->nPinned <= TESTPCACHE_NPAGE - p->nFree );  in testpcacheFetch()
207         p->a[i].isPinned = 1;  in testpcacheFetch()
209       return &p->a[i].page;  in testpcacheFetch()
219   if( p->nPinned==TESTPCACHE_NPAGE ){  in testpcacheFetch()
224   if( p->nPinned>=TESTPCACHE_NPAGE-TESTPCACHE_RESERVE && createFlag<2 ){  in testpcacheFetch()
240   if( p->nFree>TESTPCACHE_RESERVE || (createFlag==2 && p->nFree>0) ){  in testpcacheFetch()
241     j = testpcacheRandom(p) % TESTPCACHE_NPAGE;  in testpcacheFetch()
243       if( p->a[j].key==0 ){  in testpcacheFetch()
244         p->a[j].key = key;  in testpcacheFetch()
245         p->a[j].isPinned = 1;  in testpcacheFetch()
246         memset(p->a[j].page.pBuf, 0, p->szPage);  in testpcacheFetch()
247         memset(p->a[j].page.pExtra, 0, p->szExtra);  in testpcacheFetch()
248         p->nPinned++;  in testpcacheFetch()
249         p->nFree--;  in testpcacheFetch()
250         assert( p->nPinned <= TESTPCACHE_NPAGE - p->nFree );  in testpcacheFetch()
251         return &p->a[j].page;  in testpcacheFetch()
261   if( p->bPurgeable==0 ){  in testpcacheFetch()
268   j = testpcacheRandom(p) % TESTPCACHE_NPAGE;  in testpcacheFetch()
270     if( p->a[j].key>0 && p->a[j].isPinned==0 ){  in testpcacheFetch()
271       p->a[j].key = key;  in testpcacheFetch()
272       p->a[j].isPinned = 1;  in testpcacheFetch()
273       memset(p->a[j].page.pBuf, 0, p->szPage);  in testpcacheFetch()
274       memset(p->a[j].page.pExtra, 0, p->szExtra);  in testpcacheFetch()
275       p->nPinned++;  in testpcacheFetch()
276       assert( p->nPinned <= TESTPCACHE_NPAGE - p->nFree );  in testpcacheFetch()
277       return &p->a[j].page;  in testpcacheFetch()
294   testpcache *p = (testpcache*)pCache;  in testpcacheUnpin()  local
296   assert( p->iMagic==TESTPCACHE_VALID );  in testpcacheUnpin()
304   if( p->bPurgeable  in testpcacheUnpin()
305   && (100-testpcacheGlobal.discardChance) <= (testpcacheRandom(p)%100)  in testpcacheUnpin()
311     if( &p->a[i].page==pOldPage ){  in testpcacheUnpin()
313       assert( p->a[i].isPinned );  in testpcacheUnpin()
314       p->a[i].isPinned = 0;  in testpcacheUnpin()
315       p->nPinned--;  in testpcacheUnpin()
316       assert( p->nPinned>=0 );  in testpcacheUnpin()
318         p->a[i].key = 0;  in testpcacheUnpin()
319         p->nFree++;  in testpcacheUnpin()
320         assert( p->nFree<=TESTPCACHE_NPAGE );  in testpcacheUnpin()
340   testpcache *p = (testpcache*)pCache;  in testpcacheRekey()  local
342   assert( p->iMagic==TESTPCACHE_VALID );  in testpcacheRekey()
350     if( p->a[i].key==newKey ){  in testpcacheRekey()
352       assert( p->a[i].isPinned==0 );  in testpcacheRekey()
353       p->a[i].key = 0;  in testpcacheRekey()
354       p->nFree++;  in testpcacheRekey()
355       assert( p->nFree<=TESTPCACHE_NPAGE );  in testpcacheRekey()
363     if( p->a[i].key==oldKey ){  in testpcacheRekey()
365       assert( &p->a[i].page==pOldPage );  in testpcacheRekey()
367       assert( p->a[i].isPinned );  in testpcacheRekey()
368       p->a[i].key = newKey;  in testpcacheRekey()
383   testpcache *p = (testpcache*)pCache;  in testpcacheTruncate()  local
385   assert( p->iMagic==TESTPCACHE_VALID );  in testpcacheTruncate()
389     if( p->a[i].key>=iLimit ){  in testpcacheTruncate()
390       p->a[i].key = 0;  in testpcacheTruncate()
391       if( p->a[i].isPinned ){  in testpcacheTruncate()
392         p->nPinned--;  in testpcacheTruncate()
393         assert( p->nPinned>=0 );  in testpcacheTruncate()
395       p->nFree++;  in testpcacheTruncate()
396       assert( p->nFree<=TESTPCACHE_NPAGE );  in testpcacheTruncate()
405   testpcache *p = (testpcache*)pCache;  in testpcacheDestroy()  local
406   assert( p->iMagic==TESTPCACHE_VALID );  in testpcacheDestroy()
409   p->iMagic = TESTPCACHE_CLEAR;  in testpcacheDestroy()
410   sqlite3_free(p);  in testpcacheDestroy()