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+/*
+** 2004 May 22
+**
+** 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 defined OS-specific features for Unix.
+*/
+#ifndef _SQLITE_OS_UNIX_H_
+#define _SQLITE_OS_UNIX_H_
+
+/*
+** Helpful hint: To get this to compile on HP/UX, add -D_INCLUDE_POSIX_SOURCE
+** to the compiler command line.
+*/
+
+/*
+** These #defines should enable >2GB file support on Posix if the
+** underlying operating system supports it. If the OS lacks
+** large file support, or if the OS is windows, these should be no-ops.
+**
+** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch
+** on the compiler command line. This is necessary if you are compiling
+** on a recent machine (ex: RedHat 7.2) but you want your code to work
+** on an older machine (ex: RedHat 6.0). If you compile on RedHat 7.2
+** without this option, LFS is enable. But LFS does not exist in the kernel
+** in RedHat 6.0, so the code won't work. Hence, for maximum binary
+** portability you should omit LFS.
+**
+** Similar is true for MacOS. LFS is only supported on MacOS 9 and later.
+*/
+#ifndef SQLITE_DISABLE_LFS
+# define _LARGE_FILE 1
+# ifndef _FILE_OFFSET_BITS
+# define _FILE_OFFSET_BITS 64
+# endif
+# define _LARGEFILE_SOURCE 1
+#endif
+
+/*
+** standard include files.
+*/
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+/*
+** The OsFile structure is a operating-system independing representation
+** of an open file handle. It is defined differently for each architecture.
+**
+** This is the definition for Unix.
+**
+** OsFile.locktype takes one of the values SHARED_LOCK, RESERVED_LOCK,
+** PENDING_LOCK or EXCLUSIVE_LOCK.
+*/
+typedef struct OsFile OsFile;
+struct OsFile {
+ struct Pager *pPager; /* The pager that owns this OsFile. Might be 0 */
+ struct openCnt *pOpen; /* Info about all open fd's on this inode */
+ struct lockInfo *pLock; /* Info about locks on this inode */
+ int h; /* The file descriptor */
+ unsigned char locktype; /* The type of lock held on this fd */
+ unsigned char isOpen; /* True if needs to be closed */
+ int dirfd; /* File descriptor for the directory */
+};
+
+/*
+** Maximum number of characters in a temporary file name
+*/
+#define SQLITE_TEMPNAME_SIZE 200
+
+/*
+** Minimum interval supported by sqlite3OsSleep().
+*/
+#if defined(HAVE_USLEEP) && HAVE_USLEEP
+# define SQLITE_MIN_SLEEP_MS 1
+#else
+# define SQLITE_MIN_SLEEP_MS 1000
+#endif
+
+
+#endif /* _SQLITE_OS_UNIX_H_ */