--- a/engine/sqlite/src/os.h Wed May 26 10:44:32 2010 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,359 +0,0 @@
-/*
-** 2001 September 16
-**
-** 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 (together with is companion C source-code file
-** "os.c") attempt to abstract the underlying operating system so that
-** the SQLite library will work on both POSIX and windows systems.
-**
-** This header file is #include-ed by sqliteInt.h and thus ends up
-** being included by every source file.
-*/
-#ifndef _SQLITE_OS_H_
-#define _SQLITE_OS_H_
-
-/*
-** Figure out if we are dealing with Unix, Windows, or some other
-** operating system. After the following block of preprocess macros,
-** all of OS_UNIX, OS_WIN, OS_OS2, and OS_OTHER will defined to either
-** 1 or 0. One of the four will be 1. The other three will be 0.
-*/
-
-#if defined(OS_OTHER)
-
-# if OS_OTHER==1
-# undef OS_UNIX
-# define OS_UNIX 0
-# undef OS_WIN
-# define OS_WIN 0
-# undef OS_OS2
-# define OS_OS2 0
-# else
-# undef OS_OTHER
-# endif
-#endif
-#if !defined(OS_UNIX) && !defined(OS_OTHER) && !defined(OS_SYMBIAN)
-# define OS_OTHER 0
-# ifndef OS_WIN
-# if defined(_WIN32) || defined(WIN32) || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__BORLANDC__)
-# define OS_WIN 1
-# define OS_UNIX 0
-# define OS_OS2 0
-# elif defined(__EMX__) || defined(_OS2) || defined(OS2) || defined(_OS2_) || defined(__OS2__)
-# define OS_WIN 0
-# define OS_UNIX 0
-# define OS_OS2 1
-# else
-# define OS_WIN 0
-# define OS_UNIX 1
-# define OS_OS2 0
-# endif
-# else
-# define OS_UNIX 0
-# define OS_OS2 0
-# endif
-#else
-# ifndef OS_WIN
-# define OS_WIN 0
-# endif
-#endif
-
-#ifdef OS_SYMBIAN
-# define SQLITE_TEMPNAME_SIZE (MAX_PATH+50)
-#endif
-
-
-/*
-** Define the maximum size of a temporary filename
-*/
-#if OS_WIN
-# include <windows.h>
-# define SQLITE_TEMPNAME_SIZE (MAX_PATH+50)
-#elif OS_OS2
-# if (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ >= 3) && defined(OS2_HIGH_MEMORY)
-# include <os2safe.h> /* has to be included before os2.h for linking to work */
-# endif
-# define INCL_DOSDATETIME
-# define INCL_DOSFILEMGR
-# define INCL_DOSERRORS
-# define INCL_DOSMISC
-# define INCL_DOSPROCESS
-# define INCL_DOSMODULEMGR
-# define INCL_DOSSEMAPHORES
-# include <os2.h>
-# define SQLITE_TEMPNAME_SIZE (CCHMAXPATHCOMP)
-#else
-#ifndef SQLITE_TEMPNAME_SIZE
- # define SQLITE_TEMPNAME_SIZE 200
-#endif
-#endif
-
-/* If the SET_FULLSYNC macro is not defined above, then make it
-** a no-op
-*/
-#ifndef SET_FULLSYNC
-# define SET_FULLSYNC(x,y)
-#endif
-
-/*
-** The default size of a disk sector
-*/
-#ifndef SQLITE_DEFAULT_SECTOR_SIZE
-# define SQLITE_DEFAULT_SECTOR_SIZE 512
-#endif
-
-/*
-** Temporary files are named starting with this prefix followed by 16 random
-** alphanumeric characters, and no file extension. They are stored in the
-** OS's standard temporary file directory, and are deleted prior to exit.
-** If sqlite is being embedded in another program, you may wish to change the
-** prefix to reflect your program's name, so that if your program exits
-** prematurely, old temporary files can be easily identified. This can be done
-** using -DSQLITE_TEMP_FILE_PREFIX=myprefix_ on the compiler command line.
-**
-** 2006-10-31: The default prefix used to be "sqlite_". But then
-** Mcafee started using SQLite in their anti-virus product and it
-** started putting files with the "sqlite" name in the c:/temp folder.
-** This annoyed many windows users. Those users would then do a
-** Google search for "sqlite", find the telephone numbers of the
-** developers and call to wake them up at night and complain.
-** For this reason, the default name prefix is changed to be "sqlite"
-** spelled backwards. So the temp files are still identified, but
-** anybody smart enough to figure out the code is also likely smart
-** enough to know that calling the developer will not help get rid
-** of the file.
-*/
-#ifndef SQLITE_TEMP_FILE_PREFIX
-# define SQLITE_TEMP_FILE_PREFIX "etilqs_"
-#endif
-
-/*
-** The following values may be passed as the second argument to
-** sqlite3OsLock(). The various locks exhibit the following semantics:
-**
-** SHARED: Any number of processes may hold a SHARED lock simultaneously.
-** RESERVED: A single process may hold a RESERVED lock on a file at
-** any time. Other processes may hold and obtain new SHARED locks.
-** PENDING: A single process may hold a PENDING lock on a file at
-** any one time. Existing SHARED locks may persist, but no new
-** SHARED locks may be obtained by other processes.
-** EXCLUSIVE: An EXCLUSIVE lock precludes all other locks.
-**
-** PENDING_LOCK may not be passed directly to sqlite3OsLock(). Instead, a
-** process that requests an EXCLUSIVE lock may actually obtain a PENDING
-** lock. This can be upgraded to an EXCLUSIVE lock by a subsequent call to
-** sqlite3OsLock().
-*/
-#define NO_LOCK 0
-#define SHARED_LOCK 1
-#define RESERVED_LOCK 2
-#define PENDING_LOCK 3
-#define EXCLUSIVE_LOCK 4
-
-/*
-** File Locking Notes: (Mostly about windows but also some info for Unix)
-**
-** We cannot use LockFileEx() or UnlockFileEx() on Win95/98/ME because
-** those functions are not available. So we use only LockFile() and
-** UnlockFile().
-**
-** LockFile() prevents not just writing but also reading by other processes.
-** A SHARED_LOCK is obtained by locking a single randomly-chosen
-** byte out of a specific range of bytes. The lock byte is obtained at
-** random so two separate readers can probably access the file at the
-** same time, unless they are unlucky and choose the same lock byte.
-** An EXCLUSIVE_LOCK is obtained by locking all bytes in the range.
-** There can only be one writer. A RESERVED_LOCK is obtained by locking
-** a single byte of the file that is designated as the reserved lock byte.
-** A PENDING_LOCK is obtained by locking a designated byte different from
-** the RESERVED_LOCK byte.
-**
-** On WinNT/2K/XP systems, LockFileEx() and UnlockFileEx() are available,
-** which means we can use reader/writer locks. When reader/writer locks
-** are used, the lock is placed on the same range of bytes that is used
-** for probabilistic locking in Win95/98/ME. Hence, the locking scheme
-** will support two or more Win95 readers or two or more WinNT readers.
-** But a single Win95 reader will lock out all WinNT readers and a single
-** WinNT reader will lock out all other Win95 readers.
-**
-** The following #defines specify the range of bytes used for locking.
-** SHARED_SIZE is the number of bytes available in the pool from which
-** a random byte is selected for a shared lock. The pool of bytes for
-** shared locks begins at SHARED_FIRST.
-**
-** These #defines are available in sqlite_aux.h so that adaptors for
-** connecting SQLite to other operating systems can use the same byte
-** ranges for locking. In particular, the same locking strategy and
-** byte ranges are used for Unix. This leaves open the possiblity of having
-** clients on win95, winNT, and unix all talking to the same shared file
-** and all locking correctly. To do so would require that samba (or whatever
-** tool is being used for file sharing) implements locks correctly between
-** windows and unix. I'm guessing that isn't likely to happen, but by
-** using the same locking range we are at least open to the possibility.
-**
-** Locking in windows is manditory. For this reason, we cannot store
-** actual data in the bytes used for locking. The pager never allocates
-** the pages involved in locking therefore. SHARED_SIZE is selected so
-** that all locks will fit on a single page even at the minimum page size.
-** PENDING_BYTE defines the beginning of the locks. By default PENDING_BYTE
-** is set high so that we don't have to allocate an unused page except
-** for very large databases. But one should test the page skipping logic
-** by setting PENDING_BYTE low and running the entire regression suite.
-**
-** Changing the value of PENDING_BYTE results in a subtly incompatible
-** file format. Depending on how it is changed, you might not notice
-** the incompatibility right away, even running a full regression test.
-** The default location of PENDING_BYTE is the first byte past the
-** 1GB boundary.
-**
-*/
-#ifndef SQLITE_TEST
-#define PENDING_BYTE 0x40000000 /* First byte past the 1GB boundary */
-#else
-extern unsigned int sqlite3_pending_byte;
-#define PENDING_BYTE sqlite3_pending_byte
-#endif
-
-#define RESERVED_BYTE (PENDING_BYTE+1)
-#define SHARED_FIRST (PENDING_BYTE+2)
-#define SHARED_SIZE 510
-
-/*
-** Functions for accessing sqlite3_file methods
-*/
-int sqlite3OsClose(sqlite3_file*);
-int sqlite3OsRead(sqlite3_file*, void*, int amt, i64 offset);
-int sqlite3OsWrite(sqlite3_file*, const void*, int amt, i64 offset);
-int sqlite3OsTruncate(sqlite3_file*, i64 size);
-int sqlite3OsSync(sqlite3_file*, int);
-int sqlite3OsFileSize(sqlite3_file*, i64 *pSize);
-int sqlite3OsLock(sqlite3_file*, int);
-int sqlite3OsUnlock(sqlite3_file*, int);
-int sqlite3OsCheckReservedLock(sqlite3_file *id);
-int sqlite3OsFileControl(sqlite3_file*,int,void*);
-int sqlite3OsSectorSize(sqlite3_file *id);
-int sqlite3OsDeviceCharacteristics(sqlite3_file *id);
-
-/*
-** Functions for accessing sqlite3_vfs methods
-*/
-int sqlite3OsOpen(sqlite3_vfs *, const char *, sqlite3_file*, int, int *);
-int sqlite3OsDelete(sqlite3_vfs *, const char *, int);
-int sqlite3OsAccess(sqlite3_vfs *, const char *, int);
-int sqlite3OsGetTempname(sqlite3_vfs *, int, char *);
-int sqlite3OsFullPathname(sqlite3_vfs *, const char *, int, char *);
-void *sqlite3OsDlOpen(sqlite3_vfs *, const char *);
-void sqlite3OsDlError(sqlite3_vfs *, int, char *);
-void *sqlite3OsDlSym(sqlite3_vfs *, void *, const char *);
-void sqlite3OsDlClose(sqlite3_vfs *, void *);
-int sqlite3OsRandomness(sqlite3_vfs *, int, char *);
-int sqlite3OsSleep(sqlite3_vfs *, int);
-int sqlite3OsCurrentTime(sqlite3_vfs *, double*);
-
-/*
-** Convenience functions for opening and closing files using
-** sqlite3_malloc() to obtain space for the file-handle structure.
-*/
-int sqlite3OsOpenMalloc(sqlite3_vfs *, const char *, sqlite3_file **, int,int*);
-int sqlite3OsCloseFree(sqlite3_file *);
-
-/*
-** Each OS-specific backend defines an instance of the following
-** structure for returning a pointer to its sqlite3_vfs. If OS_OTHER
-** is defined (meaning that the application-defined OS interface layer
-** is used) then there is no default VFS. The application must
-** register one or more VFS structures using sqlite3_vfs_register()
-** before attempting to use SQLite.
-*/
-#if OS_UNIX || OS_WIN || OS_OS2 || OS_SYMBIAN
-sqlite3_vfs *sqlite3OsDefaultVfs(void);
-#else
-# define sqlite3OsDefaultVfs(X) 0
-#endif
-
- int winDelete(
- sqlite3_vfs *pVfs, /* Not used on win32 */
- const char *zFilename, /* Name of file to delete */
- int syncDir /* Not used on win32 */
-);
-
- int winAccess(
- sqlite3_vfs *pVfs, /* Not used on win32 */
- const char *zFilename, /* Name of file to check */
- int flags /* Type of test to make on this file */
-);
-
- int winGetTempname(sqlite3_vfs *pVfs, int nBuf, char *zBuf);
-
- int winFullPathname(
- sqlite3_vfs *pVfs, /* Pointer to vfs object */
- const char *zRelative, /* Possibly relative input path */
- int nFull, /* Size of output buffer in bytes */
- char *zFull /* Output buffer */
-);
-
- int winRandomness(sqlite3_vfs *pVfs, int nBuf, char *zBuf);
-
- int winClose(sqlite3_file *id);
-
- int winRead(
- sqlite3_file *id, /* File to read from */
- void *pBuf, /* Write content into this buffer */
- int amt, /* Number of bytes to read */
- sqlite3_int64 offset /* Begin reading at this offset */
-);
-
- int winWrite(
- sqlite3_file *id, /* File to write into */
- const void *pBuf, /* The bytes to be written */
- int amt, /* Number of bytes to write */
- sqlite3_int64 offset /* Offset into the file to begin writing at */
-);
-
- int winTruncate(sqlite3_file *id, sqlite3_int64 nByte);
-
- int winSync(sqlite3_file *id, int flags);
-
- int symbianFileSize(sqlite3_file *id, sqlite3_int64 *pSize);
-
- int winLock(sqlite3_file *id, int locktype);
-
- int winCheckReservedLock(sqlite3_file *id);
-
- int winUnlock(sqlite3_file *id, int locktype);
-
- int symbianFileControl(sqlite3_file *id, int op, void *pArg);
-
- int winSectorSize(sqlite3_file *id);
-
- int winDeviceCharacteristics(sqlite3_file *id);
-
- int winOpen(
- sqlite3_vfs *pVfs, /* Not used */
- const char *zName, /* Name of the file (UTF-8) */
- sqlite3_file *id, /* Write the SQLite file handle here */
- int flags, /* Open mode flags */
- int *pOutFlags /* Status return flags */
-);
- int winFullPathname(
- sqlite3_vfs *pVfs, /* Pointer to vfs object */
- const char *zRelative, /* Possibly relative input path */
- int nFull, /* Size of output buffer in bytes */
- char *zFull /* Output buffer */
-);
- int winSleep(sqlite3_vfs *pVfs, int microsec);
- int winCurrentTime(sqlite3_vfs *pVfs, double *prNow);
-
- int winFileSize(sqlite3_file *id, sqlite3_int64 *pSize);
-
- int winFileControl(sqlite3_file *id, int op, void *pArg);
-
-#endif /* _SQLITE_OS_H_ */