lmdb: cleanup Windows support.

Change-Id: I7bc7f3e997eeea4c5678a97e2faf10525ba7eee6

lmdb.h

@@ -51,7 +51,6 @@
  *	  Fix: Check for stale readers periodically, using the
  *	  #mdb_reader_check function or the \ref mdb_stat_1 "mdb_stat" tool.
  *	  Stale writers will be cleared automatically on most systems:
- *	  - Windows - automatic
  *	  - BSD, systems using SysV semaphores - automatic
  *	  - Linux, systems using POSIX mutexes with Robust option - automatic
  *	  Otherwise just make all programs using the database close it;
@@ -162,22 +161,10 @@
 extern "C" {
 #endif
 
-/** Unix permissions for creating files, or dummy definition for Windows */
-#ifdef _MSC_VER
-typedef	int	mdb_mode_t;
-#else
-typedef	mode_t	mdb_mode_t;
-#endif
-
 /** An abstraction for a file handle.
- *	On POSIX systems file handles are small integers. On Windows
+ *	On POSIX systems file handles are small integers.
- *	they're opaque pointers.
  */
-#ifdef _WIN32
-typedef	void *mdb_filehandle_t;
-#else
 typedef int mdb_filehandle_t;
-#endif
 
 /** @defgroup mdb LMDB API
  *	@{
@@ -290,7 +277,7 @@ typedef void (MDB_rel_func)(MDB_val *item, void *oldptr, void *newptr, void *rel
 #define MDB_NOTLS		0x200000
 	/** don't do any locking, caller must manage their own locks */
 #define MDB_NOLOCK		0x400000
-	/** don't do readahead (no effect on Windows) */
+	/** don't do readahead */
 #define MDB_NORDAHEAD	0x800000
 	/** don't initialize malloc'd memory before writing to datafile */
 #define MDB_NOMEMINIT	0x1000000
@@ -414,8 +401,6 @@ typedef enum MDB_cursor_op {
 #define MDB_DBS_FULL	(-30791)
 	/** Environment maxreaders reached */
 #define MDB_READERS_FULL	(-30790)
-	/** Too many TLS keys in use - Windows only */
-#define MDB_TLS_FULL	(-30789)
 	/** Txn has too many dirty pages */
 #define MDB_TXN_FULL	(-30788)
 	/** Cursor stack too deep - internal error */
@@ -579,7 +564,6 @@ int  mdb_env_create(MDB_env **env);
 	 *		read requests by default. This option turns it off if the OS
 	 *		supports it. Turning it off may help random read performance
 	 *		when the DB is larger than RAM and system RAM is full.
-	 *		The option is not implemented on Windows.
 	 *	<li>#MDB_NOMEMINIT
 	 *		Don't initialize malloc'd memory before writing to unused spaces
 	 *		in the data file. By default, memory for pages written to the data
@@ -606,8 +590,7 @@ int  mdb_env_create(MDB_env **env);
 	 *		LIFO policy for reclaiming FreeDB records. This significantly reduce
 	 *		write IPOS in case MDB_NOSYNC with periodically checkpoints.
 	 * </ul>
-	 * @param[in] mode The UNIX permissions to set on created files. This parameter
+	 * @param[in] mode The UNIX permissions to set on created files.
-	 * is ignored on Windows.
 	 * @return A non-zero error value on failure and 0 on success. Some possible
 	 * errors are:
 	 * <ul>
@@ -619,7 +602,7 @@ int  mdb_env_create(MDB_env **env);
 	 *	<li>EAGAIN - the environment was locked by another process.
 	 * </ul>
 	 */
-int  mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode);
+int  mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode);
 
 	/** @brief Copy an LMDB environment to the specified path.
 	 *