db_env_set_tas_spins
db_env_set_tas_spins |
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#include <db.h>int db_env_set_tas_spins(u_int32_t tas_spins);
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 db_env_set_tas_spins interface affects the entire application, not a single database or database environment.
Although the db_env_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 functions.
The db_env_set_tas_spins function returns a non-zero error value on failure and 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.
The db_env_set_tas_spins function may fail and return a non-zero error for the following conditions:
The db_env_set_tas_spins function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the db_env_set_tas_spins function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.
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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 d6 1 a6 1
The DB_ENV->set_tas_spins interface affects the entire application, not a single d33 1 a33 1
Although the DB_ENV->set_tas_spins interface may be used to configure Berkeley DB at any time d36 1 a36 1
The DB_ENV->set_tas_spins function returns a non-zero error value on failure and 0 on success. d44 1 a44 1
The DB_ENV->set_tas_spins function may fail and return a non-zero error for the following conditions: d48 2 a49 2
The DB_ENV->set_tas_spins function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB_ENV->set_tas_spins function may fail and return d66 2 d69 1 d72 1 d74 1 a74 1 DB_ENV->set_tas_spins, a75 1 DB_ENV->set_timeout, @ 1.1.1.3 log @Import: RPM 4.0.5 @ text @d1 2 a2 2 a3 1 d31 6 a36 6
The DB_ENV->set_tas_spins method configures operations performed using the specified DB_ENV handle, not all operations performed on the underlying database environment.
The DB_ENV->set_tas_spins interface may be called at any time during the life of the application.
The DB_ENV->set_tas_spins method returns a non-zero error value on failure and 0 on success. d44 1 a44 1
The DB_ENV->set_tas_spins method may fail and return a non-zero error for the following conditions: d48 4 a51 6
The DB_ENV->set_tas_spins method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB_ENV->set_tas_spins method may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.
The DB_ENV->set_tas_spins interface affects the entire application, not a single database or database environment.
Although the DB_ENV->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 functions.
The DB_ENV->set_tas_spins function returns a non-zero error value on failure and 0 on success. d45 1 a45 1
The DB_ENV->set_tas_spins function may fail and return a non-zero error for the following conditions: d49 6 a54 4
The DB_ENV->set_tas_spins function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB_ENV->set_tas_spins function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way. d56 1 a56 24 db_env_create, DB_ENV->close, DB_ENV->err, DB_ENV->errx DB_ENV->open, DB_ENV->remove, DB_ENV->set_alloc, DB_ENV->set_cachesize, DB_ENV->set_data_dir, DB_ENV->set_errcall, DB_ENV->set_errfile, DB_ENV->set_errpfx, DB_ENV->set_feedback, DB_ENV->set_flags, DB_ENV->set_paniccall, DB_ENV->set_recovery_init, DB_ENV->set_rpc_server, DB_ENV->set_shm_key, DB_ENV->set_tas_spins, DB_ENV->set_tmp_dir, DB_ENV->set_timeout, DB_ENV->set_verbose, db_strerror and db_version. @ 1.1.1.5 log @Import: RPM 4.1.1 @ text @d1 2 a2 2 a3 1 d31 6 a36 6
The DB_ENV->set_tas_spins method configures operations performed using the specified DB_ENV handle, not all operations performed on the underlying database environment.
The DB_ENV->set_tas_spins interface may be called at any time during the life of the application.
The DB_ENV->set_tas_spins method returns a non-zero error value on failure and 0 on success. d44 1 a44 1
The DB_ENV->set_tas_spins method may fail and return a non-zero error for the following conditions: d48 4 a51 6
The DB_ENV->set_tas_spins method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB_ENV->set_tas_spins method may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.