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/*
** 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.
*/
#ifndef _SQLITE_OS_H_
#define _SQLITE_OS_H_
#ifndef OS_UNIX
# ifndef OS_WIN
# if defined(_WIN32) || defined(WIN32) || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__BORLANDC__)
# define OS_WIN 1
# define OS_UNIX 0
# else
# define OS_WIN 0
# define OS_UNIX 1
# endif
# else
# define OS_UNIX 0
# endif
#endif
#ifndef OS_WIN
# define OS_WIN 0
#endif
/*
** A handle for an open file is stored in an OsFile object.
*/
#if OS_UNIX
typedef struct OsFile OsFile;
struct OsFile {
struct lockInfo *pLock; /* Information about locks on this inode */
int fd; /* The file descriptor */
int locked; /* True if this user holds the lock */
};
# define SQLITE_TEMPNAME_SIZE 200
# if defined(HAVE_USLEEP) && HAVE_USLEEP
# define SQLITE_MIN_SLEEP_MS 1
# else
# define SQLITE_MIN_SLEEP_MS 1000
# endif
#endif
#if OS_WIN
#include <windows.h>
#include <winbase.h>
typedef struct OsFile OsFile;
struct OsFile {
HANDLE h;
int locked;
};
# define SQLITE_TEMPNAME_SIZE (MAX_PATH+50)
# define SQLITE_MIN_SLEEP_MS 1
#endif
int sqliteOsDelete(const char*);
int sqliteOsFileExists(const char*);
int sqliteOsOpenReadWrite(const char*, OsFile*, int*);
int sqliteOsOpenExclusive(const char*, OsFile*, int);
int sqliteOsOpenReadOnly(const char*, OsFile*);
int sqliteOsTempFileName(char*);
int sqliteOsClose(OsFile*);
int sqliteOsRead(OsFile*, void*, int amt);
int sqliteOsWrite(OsFile*, const void*, int amt);
int sqliteOsSeek(OsFile*, int offset);
int sqliteOsSync(OsFile*);
int sqliteOsTruncate(OsFile*, int size);
int sqliteOsFileSize(OsFile*, int *pSize);
int sqliteOsReadLock(OsFile*);
int sqliteOsWriteLock(OsFile*);
int sqliteOsUnlock(OsFile*);
int sqliteOsRandomSeed(char*);
int sqliteOsSleep(int ms);
void sqliteOsEnterMutex(void);
void sqliteOsLeaveMutex(void);
#endif /* _SQLITE_OS_H_ */
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