Make the cookbook env opening unsafe

heed/src/cookbook.rs

@@ -28,10 +28,12 @@
 //!
 //! fs::create_dir_all(&env_path)?;
 //!
-//! let env = EnvOpenOptions::new()
-//! .map_size(10 * 1024 * 1024) // 10MB
-//! .max_dbs(3) // Number of opened databases
-//! .open(env_path)?;
+//! let env = unsafe {
+//! EnvOpenOptions::new()
+//! .map_size(10 * 1024 * 1024) // 10MB
+//! .max_dbs(3) // Number of opened databases
+//! .open(env_path)?
+//! };
 //!
 //! let rtxn = env.read_txn()?;
 //! let unnamed: Database<Str, DecodeIgnore> =
@@ -165,10 +167,12 @@
 //!
 //! fs::create_dir_all(&path)?;
 //!
-//! let env = EnvOpenOptions::new()
-//! .map_size(10 * 1024 * 1024) // 10MB
-//! .max_dbs(3000)
-//! .open(path)?;
+//! let env = unsafe {
+//! EnvOpenOptions::new()
+//! .map_size(10 * 1024 * 1024) // 10MB
+//! .max_dbs(3000)
+//! .open(path)?
+//! };
 //!
 //! let mut wtxn = env.write_txn()?;
 //! let db: Database<LogKeyCodec, Str> = env.create_database(&mut wtxn, None)?;
@@ -228,9 +232,11 @@
 //!
 //! fs::create_dir_all(&path)?;
 //!
-//! let env = EnvOpenOptions::new()
-//! .map_size(16384) // one page
-//! .open(&path)?;
+//! let env = unsafe {
+//! EnvOpenOptions::new()
+//! .map_size(16384) // one page
+//! .open(&path)?
+//! };
 //!
 //! let mut wtxn = env.write_txn()?;
 //! let db: Database<Str, Str> = env.create_database(&mut wtxn, None)?;
@@ -247,9 +253,11 @@
 //! // when no transaction are running so closing the env is easier.
 //! env.prepare_for_closing().wait();
 //!
-//! let env = EnvOpenOptions::new()
-//! .map_size(10 * 16384) // 10 pages
-//! .open(&path)?;
+//! let env = unsafe {
+//! EnvOpenOptions::new()
+//! .map_size(10 * 16384) // 10 pages
+//! .open(&path)?
+//! };
 //!
 //! let mut wtxn = env.write_txn()?;
 //! let db: Database<Str, Str> = env.create_database(&mut wtxn, None)?;
@@ -291,9 +299,11 @@
 //!
 //! fs::create_dir_all(&path)?;
 //!
-//! let env = EnvOpenOptions::new()
-//! .map_size(1024 * 1024 * 100) // 100 MiB
-//! .open(&path)?;
+//! let env = unsafe {
+//! EnvOpenOptions::new()
+//! .map_size(1024 * 1024 * 100) // 100 MiB
+//! .open(&path)?
+//! };
 //!
 //! let mut wtxn = env.write_txn()?;
 //! let db: Database<Str, SerdeJson<StringMap>> = env.create_database(&mut wtxn, None)?;
@@ -369,9 +379,11 @@
 //!
 //! fs::create_dir_all(&path)?;
 //!
-//! let env = EnvOpenOptions::new()
-//! .map_size(1024 * 1024 * 100) // 100 MiB
-//! .open(&path)?;
+//! let env = unsafe {
+//! EnvOpenOptions::new()
+//! .map_size(1024 * 1024 * 100) // 100 MiB
+//! .open(&path)?
+//! };
 //!
 //! let mut wtxn = env.write_txn()?;
 //! let db: Database<Str, Str> = env.create_database(&mut wtxn, None)?;