head 1.2; access; symbols RPM_4_2_1:1.1.1.5 RPM_4_2:1.1.1.5 RPM_4_1_1:1.1.1.5 RPM_4_1:1.1.1.4 RPM_4_0_5:1.1.1.3 RPM_4_0_4:1.1.1.2 RPM_4_0_3:1.1.1.1 RPM:1.1.1; locks; strict; comment @# @; 1.2 date 2008.01.02.09.53.27; author rse; state dead; branches; next 1.1; commitid z4cpSiAhOCXk5PLs; 1.1 date 2001.07.23.20.45.36; author rse; state Exp; branches 1.1.1.1; next ; 1.1.1.1 date 2001.07.23.20.45.36; author rse; state Exp; branches; next 1.1.1.2; 1.1.1.2 date 2002.01.08.00.30.09; author rse; state Exp; branches; next 1.1.1.3; 1.1.1.3 date 2003.01.18.13.48.59; author rse; state Exp; branches; next 1.1.1.4; 1.1.1.4 date 2001.12.06.00.08.05; author rse; state Exp; branches; next 1.1.1.5; 1.1.1.5 date 2003.01.18.14.04.57; author rse; state Exp; branches; next ; desc @@ 1.2 log @remove the ancient RPM 4.2.1 source tree copy @ text @ Berkeley DB: DbEnv::set_tas_spins

DbEnv::set_tas_spins

 APIRef 

#include <db_cxx.h>


static int
DbEnv::set_tas_spins(u_int32_t tas_spins);

Description

Specify that test-and-set mutexes should spin tas_spins times without blocking. The value defaults to 1 on uniprocessor systems and to 50 times the number of processors on multiprocessor systems.

The DbEnv::set_tas_spins interface affects the entire application, not a single database or database environment.

Although the DbEnv::set_tas_spins interface may be used to configure Berkeley DB at any time during the life of the application, it should normally be called before making any calls to the db_env_create or db_create methods.

The DbEnv::set_tas_spins method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 0 on success.

The database environment's test-and-set spin count may also be set using the environment's DB_CONFIG file. The syntax of the entry in that file is a single line with the string "set_tas_spins", one or more whitespace characters, and the number of spins. Because the DB_CONFIG file is read when the database environment is opened, it will silently overrule configuration done before that time.

Errors

The DbEnv::set_tas_spins method may fail and throw an exception or return a non-zero error for the following conditions:

EINVAL
An invalid flag value or parameter was specified.

The DbEnv::set_tas_spins method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbEnv::set_tas_spins method may fail and either return DB_RUNRECOVERY or throw an exception encapsulating DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

Class

DbEnv

See Also

DbEnv::close, DbEnv::err, DbEnv::errx DbEnv::open, DbEnv::remove, DbEnv::set_alloc, DbEnv::set_cachesize, DbEnv::set_data_dir, DbEnv::set_errcall, DbEnv::set_errfile, DbEnv::set_error_stream, DbEnv::set_errpfx, DbEnv::set_feedback, DbEnv::set_flags, DbEnv::set_mutexlocks, DbEnv::set_pageyield, DbEnv::set_paniccall, DbEnv::set_panicstate, DbEnv::set_recovery_init, DbEnv::set_rpc_server, DbEnv::set_region_init, DbEnv::set_shm_key, DbEnv::set_tas_spins, DbEnv::set_tmp_dir, DbEnv::set_verbose, DbEnv::strerror and DbEnv::version.

APIRef

Copyright Sleepycat Software @ 1.1 log @Initial revision @ text @d1 1 a1 1 @ 1.1.1.1 log @Import: RPM 4.0.3 @ text @@ 1.1.1.2 log @Import: RPM 4.0.4 @ text @d1 1 a1 1 d17 1 a17 1 APIRef d70 2 d73 1 d76 1 a79 1 DbEnv::set_timeout, d86 1 a86 1 APIRef @ 1.1.1.3 log @Import: RPM 4.0.5 @ text @d1 2 a2 2 a3 1 d24 1 a24 1 int d31 5 a35 5

The DbEnv::set_tas_spins method configures operations performed using the specified DbEnv handle, not all operations performed on the underlying database environment.

The DbEnv::set_tas_spins interface may be called at any time during the life of the application. d50 4 a53 4 If a catastrophic error has occurred, the DbEnv::set_tas_spins method may fail and either return DB_RUNRECOVERY or throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way. d55 1 a55 1 DbEnv d57 24 a80 1 Database Environments and Related Methods @ 1.1.1.4 log @Import: RPM 4.1 @ text @d1 2 a2 2 d4 1 d25 1 a25 1 static int d32 5 a36 5

The DbEnv::set_tas_spins interface affects the entire application, not a single database or database environment.

Although the DbEnv::set_tas_spins interface may be used to configure Berkeley DB at any time during the life of the application, it should normally be called before making any calls to the db_env_create or db_create methods. d51 4 a54 4 If a catastrophic error has occurred, the DbEnv::set_tas_spins method may fail and either return DB_RUNRECOVERY or throw an exception encapsulating DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way. d56 1 a56 1 DbEnv d58 1 a58 24 DbEnv::close, DbEnv::err, DbEnv::errx DbEnv::open, DbEnv::remove, DbEnv::set_alloc, DbEnv::set_cachesize, DbEnv::set_data_dir, DbEnv::set_errcall, DbEnv::set_errfile, DbEnv::set_error_stream, DbEnv::set_errpfx, DbEnv::set_feedback, DbEnv::set_flags, DbEnv::set_paniccall, DbEnv::set_recovery_init, DbEnv::set_rpc_server, DbEnv::set_shm_key, DbEnv::set_tas_spins, DbEnv::set_tmp_dir, DbEnv::set_timeout, DbEnv::set_verbose, DbEnv::strerror and DbEnv::version. @ 1.1.1.5 log @Import: RPM 4.1.1 @ text @d1 2 a2 2 a3 1 d24 1 a24 1 int d31 5 a35 5

The DbEnv::set_tas_spins method configures operations performed using the specified DbEnv handle, not all operations performed on the underlying database environment.

The DbEnv::set_tas_spins interface may be called at any time during the life of the application. d50 4 a53 4 If a catastrophic error has occurred, the DbEnv::set_tas_spins method may fail and either return DB_RUNRECOVERY or throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way. d55 1 a55 1 DbEnv d57 24 a80 1 Database Environments and Related Methods @