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<!--$Id: env.so,v 1.9 2007/09/26 15:11:31 bostic Exp $--> <!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB Reference Guide: Release 4.0: db_env_set_XXX</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> </head> <body bgcolor=white> <table width="100%"><tr valign=top> <td><b><dl><dt>Berkeley DB Reference Guide:<dd>Upgrading Berkeley DB Applications</dl></b></td> <td align=right><a href="../upgrade.4.0/txn.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.4.0/rpc.html"><img src="../../images/next.gif" alt="Next"></a> </td></tr></table> <p align=center><b>Release 4.0: db_env_set_XXX</b></p> <p>The db_env_set_region_init function was removed in the 4.0 release and replaced with the <a href="../../api_c/env_set_flags.html#DB_REGION_INIT">DB_REGION_INIT</a> flag to the <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a> method. This is an interface change: historically, the db_env_set_region_init function operated on the entire Berkeley DB library, not a single environment. The new method only operates on a single <a href="../../api_c/env_class.html">DB_ENV</a> handle (and any handles created in the scope of that handle). Applications calling the db_env_set_region_init function should update their calls: calls to the historic routine with an argument of 1 (0) are equivalent to calling <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a> with the <a href="../../api_c/env_set_flags.html#DB_REGION_INIT">DB_REGION_INIT</a> flag and an argument of 1 (0).</p> <p>The db_env_set_tas_spins function was removed in the 4.0 release and replaced with the DB_ENV->set_tas_spins method. This is an interface change: historically, the db_env_set_tas_spins function operated on the entire Berkeley DB library, not a single environment. The new method only operates on a single <a href="../../api_c/env_class.html">DB_ENV</a> handle (and any handles created in the scope of that handle). Applications calling the db_env_set_tas_spins function should update their calls: calls to the historic routine are equivalent to calling DB_ENV->set_tas_spins with the same argument. In addition, for consistent behavior, all <a href="../../api_c/env_class.html">DB_ENV</a> handles opened by the application should make the same configuration call, or the value will need to be entered into the environment's <a href="../../ref/env/db_config.html#DB_CONFIG">DB_CONFIG</a> file.</p> <p>Also, three of the standard Berkeley DB debugging interfaces changed in the 4.0 release. It is quite unlikely that Berkeley DB applications use these interfaces.</p> <p>The DB_ENV->set_mutexlocks method was removed in the 4.0 release and replaced with the <a href="../../api_c/env_set_flags.html#DB_NOLOCKING">DB_NOLOCKING</a> flag to the <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a> method. Applications calling the DB_ENV->set_mutexlocks method should update their calls: calls to the historic routine with an argument of 1 (0) are equivalent to calling <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a> with the <a href="../../api_c/env_set_flags.html#DB_NOLOCKING">DB_NOLOCKING</a> flag and an argument of 1 (0).</p> <p>The db_env_set_pageyield function was removed in the 4.0 release and replaced with the <a href="../../api_c/env_set_flags.html#DB_YIELDCPU">DB_YIELDCPU</a> flag to the <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a> method. This is an interface change: historically, the db_env_set_pageyield function operated on the entire Berkeley DB library, not a single environment. The new method only operates on a single <a href="../../api_c/env_class.html">DB_ENV</a> handle (and any handles created in the scope of that handle). Applications calling the db_env_set_pageyield function should update their calls: calls to the historic routine with an argument of 1 (0) are equivalent to calling <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a> with the <a href="../../api_c/env_set_flags.html#DB_YIELDCPU">DB_YIELDCPU</a> flag and an argument of 1 (0). In addition, all <a href="../../api_c/env_class.html">DB_ENV</a> handles opened by the application will need to make the same call, or the <a href="../../api_c/env_set_flags.html#DB_YIELDCPU">DB_YIELDCPU</a> flag will need to be entered into the environment's <a href="../../ref/env/db_config.html#DB_CONFIG">DB_CONFIG</a> file.</p> <p>The db_env_set_panicstate function was removed in the 4.0 release, replaced with the <a href="../../api_c/env_set_flags.html#DB_PANIC_ENVIRONMENT">DB_PANIC_ENVIRONMENT</a> and <a href="../../api_c/env_set_flags.html#DB_NOPANIC">DB_NOPANIC</a> flags to the <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a> method. (The <a href="../../api_c/env_set_flags.html#DB_PANIC_ENVIRONMENT">DB_PANIC_ENVIRONMENT</a> flag will cause an environment to panic, affecting all threads of control using that environment. The <a href="../../api_c/env_set_flags.html#DB_NOPANIC">DB_NOPANIC</a> flag will cause a single <a href="../../api_c/env_class.html">DB_ENV</a> handle to ignore the current panic state of the environment.) This is an interface change: historically the db_env_set_panicstate function operated on the entire Berkeley DB library, not a single environment. Applications calling the db_env_set_panicstate function should update their calls, replacing the historic call with a call to <a href="../../api_c/env_set_flags.html">DB_ENV->set_flags</a> and the appropriate flag, depending on their usage of the historic interface.</p> <table width="100%"><tr><td><br></td><td align=right><a href="../upgrade.4.0/txn.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../upgrade.4.0/rpc.html"><img src="../../images/next.gif" alt="Next"></a> </td></tr></table> <p><font size=1>Copyright (c) 1996,2008 Oracle. 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