Move bundled copy of sqlite one level deeper to better separate it...

third_party/sqlite/src/pcache.h

Index: third_party/sqlite/src/pcache.h
===================================================================
--- third_party/sqlite/src/pcache.h	(revision 56608)
+++ third_party/sqlite/src/pcache.h	(working copy)
@@ -1,155 +0,0 @@
-/*
-** 2008 August 05
-**
-** The author disclaims copyright to this source code.  In place of
-** a legal notice, here is a blessing:
-**
-**    May you do good and not evil.
-**    May you find forgiveness for yourself and forgive others.
-**    May you share freely, never taking more than you give.
-**
-*************************************************************************
-** This header file defines the interface that the sqlite page cache
-** subsystem. 
-**
-** @(#) $Id: pcache.h,v 1.20 2009/07/25 11:46:49 danielk1977 Exp $
-*/
-
-#ifndef _PCACHE_H_
-
-typedef struct PgHdr PgHdr;
-typedef struct PCache PCache;
-
-/*
-** Every page in the cache is controlled by an instance of the following
-** structure.
-*/
-struct PgHdr {
-  void *pData;                   /* Content of this page */
-  void *pExtra;                  /* Extra content */
-  PgHdr *pDirty;                 /* Transient list of dirty pages */
-  Pgno pgno;                     /* Page number for this page */
-  Pager *pPager;                 /* The pager this page is part of */
-#ifdef SQLITE_CHECK_PAGES
-  u32 pageHash;                  /* Hash of page content */
-#endif
-  u16 flags;                     /* PGHDR flags defined below */
-
-  /**********************************************************************
-  ** Elements above are public.  All that follows is private to pcache.c
-  ** and should not be accessed by other modules.
-  */
-  i16 nRef;                      /* Number of users of this page */
-  PCache *pCache;                /* Cache that owns this page */
-
-  PgHdr *pDirtyNext;             /* Next element in list of dirty pages */
-  PgHdr *pDirtyPrev;             /* Previous element in list of dirty pages */
-};
-
-/* Bit values for PgHdr.flags */
-#define PGHDR_DIRTY             0x002  /* Page has changed */
-#define PGHDR_NEED_SYNC         0x004  /* Fsync the rollback journal before
-                                       ** writing this page to the database */
-#define PGHDR_NEED_READ         0x008  /* Content is unread */
-#define PGHDR_REUSE_UNLIKELY    0x010  /* A hint that reuse is unlikely */
-#define PGHDR_DONT_WRITE        0x020  /* Do not write content to disk */
-
-/* Initialize and shutdown the page cache subsystem */
-int sqlite3PcacheInitialize(void);
-void sqlite3PcacheShutdown(void);
-
-/* Page cache buffer management:
-** These routines implement SQLITE_CONFIG_PAGECACHE.
-*/
-void sqlite3PCacheBufferSetup(void *, int sz, int n);
-
-/* Create a new pager cache.
-** Under memory stress, invoke xStress to try to make pages clean.
-** Only clean and unpinned pages can be reclaimed.
-*/
-void sqlite3PcacheOpen(
-  int szPage,                    /* Size of every page */
-  int szExtra,                   /* Extra space associated with each page */
-  int bPurgeable,                /* True if pages are on backing store */
-  int (*xStress)(void*, PgHdr*), /* Call to try to make pages clean */
-  void *pStress,                 /* Argument to xStress */
-  PCache *pToInit                /* Preallocated space for the PCache */
-);
-
-/* Modify the page-size after the cache has been created. */
-void sqlite3PcacheSetPageSize(PCache *, int);
-
-/* Return the size in bytes of a PCache object.  Used to preallocate
-** storage space.
-*/
-int sqlite3PcacheSize(void);
-
-/* One release per successful fetch.  Page is pinned until released.
-** Reference counted. 
-*/
-int sqlite3PcacheFetch(PCache*, Pgno, int createFlag, PgHdr**);
-void sqlite3PcacheRelease(PgHdr*);
-
-void sqlite3PcacheDrop(PgHdr*);         /* Remove page from cache */
-void sqlite3PcacheMakeDirty(PgHdr*);    /* Make sure page is marked dirty */
-void sqlite3PcacheMakeClean(PgHdr*);    /* Mark a single page as clean */
-void sqlite3PcacheCleanAll(PCache*);    /* Mark all dirty list pages as clean */
-
-/* Change a page number.  Used by incr-vacuum. */
-void sqlite3PcacheMove(PgHdr*, Pgno);
-
-/* Remove all pages with pgno>x.  Reset the cache if x==0 */
-void sqlite3PcacheTruncate(PCache*, Pgno x);
-
-/* Get a list of all dirty pages in the cache, sorted by page number */
-PgHdr *sqlite3PcacheDirtyList(PCache*);
-
-/* Reset and close the cache object */
-void sqlite3PcacheClose(PCache*);
-
-/* Clear flags from pages of the page cache */
-void sqlite3PcacheClearSyncFlags(PCache *);
-
-/* Discard the contents of the cache */
-void sqlite3PcacheClear(PCache*);
-
-/* Return the total number of outstanding page references */
-int sqlite3PcacheRefCount(PCache*);
-
-/* Increment the reference count of an existing page */
-void sqlite3PcacheRef(PgHdr*);
-
-int sqlite3PcachePageRefcount(PgHdr*);
-
-/* Return the total number of pages stored in the cache */
-int sqlite3PcachePagecount(PCache*);
-
-#if defined(SQLITE_CHECK_PAGES) || defined(SQLITE_DEBUG)
-/* Iterate through all dirty pages currently stored in the cache. This
-** interface is only available if SQLITE_CHECK_PAGES is defined when the 
-** library is built.
-*/
-void sqlite3PcacheIterateDirty(PCache *pCache, void (*xIter)(PgHdr *));
-#endif
-
-/* Set and get the suggested cache-size for the specified pager-cache.
-**
-** If no global maximum is configured, then the system attempts to limit
-** the total number of pages cached by purgeable pager-caches to the sum
-** of the suggested cache-sizes.
-*/
-void sqlite3PcacheSetCachesize(PCache *, int);
-int sqlite3PcacheGetCachesize(PCache *);
-
-#ifdef SQLITE_ENABLE_MEMORY_MANAGEMENT
-/* Try to return memory used by the pcache module to the main memory heap */
-int sqlite3PcacheReleaseMemory(int);
-#endif
-
-#ifdef SQLITE_TEST
-void sqlite3PcacheStats(int*,int*,int*,int*);
-#endif
-
-void sqlite3PCacheSetDefault(void);
-
-#endif /* _PCACHE_H_ */