Cleanup thread-safe work, bump version.

FossilOrigin-Name: 2d0770a550c41261b3bc7e54aaeb02809ca991e92f25c71f5864cda9d873fc27

History.md

@@ -1,5 +1,13 @@
 # Release History for MDBX
 
+---
+## v0.4.0 [2025-04-30] Mahlon E. Smith <mahlon@martini.nu>
+
+Enhancements:
+
+- Opening a long running transaction is now thread safe.
+
+
 ---
 ## v0.3.8 [2025-02-20] Mahlon E. Smith <mahlon@martini.nu>
 

ext/mdbx_ext/database.c

@@ -465,27 +465,21 @@ rmdbx_in_transaction_p( VALUE self )
 }
 
 
+/* Inline struct for transaction arguments, passed as a void pointer. */
 struct txn_open_args_s {
 	rmdbx_db_t *db;
 	int rwflag;
 };
 
 
-/* Opens a transaction outside of th GVL. */
+/* Opens a transaction outside of the GVL. */
 void *
 rmdbx_open_txn_without_gvl( void *ptr )
 {
-	// struct query_call *qcall = (struct query_call *)ptr;
 	struct txn_open_args_s *txn_open_args = (struct txn_open_args_s *)ptr;
 
 	rmdbx_db_t *db = txn_open_args->db;
-
-	int rc = mdbx_txn_begin(
-		db->env,
-		NULL,
-		txn_open_args->rwflag,
-		&db->txn
-	);
+	int rc = mdbx_txn_begin( db->env, NULL, txn_open_args->rwflag, &db->txn );
 
 	return (void *)rc;
 }
@@ -508,7 +502,7 @@ rmdbx_open_txn( rmdbx_db_t *db, int rwflag )
 
 	void *result_ptr = rb_thread_call_without_gvl(
 		rmdbx_open_txn_without_gvl, (void *)&txn_open_args,
-		NULL, NULL
+		RUBY_UBF_IO, NULL
 	);
 
 	int rc = (int)result_ptr;

ext/mdbx_ext/mdbx_ext.h

@@ -1,9 +1,9 @@
 
 #include <ruby.h>
+#include <ruby/thread.h>
 #include "extconf.h"
 
 #include "mdbx.h"
-#include "ruby/thread.h"
 
 #ifndef RBMDBX_EXT
 #define RBMDBX_EXT

lib/mdbx.rb

@@ -13,7 +13,7 @@ module MDBX
 	extend Loggability
 
 	# The version of this gem.
-	VERSION = '0.3.8'
+	VERSION = '0.4.0'
 
 
 	log_as :mdbx