### db_env_set_func_sleep |

`

###

    #include <db.h>

    int
    db_env_set_func_sleep(int (*func_sleep)(u_long seconds, u_long microseconds));

### Description: db_env_set_func_sleep

The Berkeley DB library requires the ability to cause a thread of control to suspend itself for a period of time, relinquishing control of the processor to any other waiting thread of control.

The db_env_set_func_sleep method configures all operations performed by a process and all of its threads of control, not operations confined to a single database environment.

Although the db_env_set_func_sleep method may be called at any time during the life of the application, it should normally be called before making calls to the db_env_create or db_create methods.

The db_env_set_func_sleep method returns a non-zero error value on failure and 0 on success.

### Parameters

func_sleep
  The func_sleep parameter is the function which seeks to a specific location in a file.

  The seconds and microseconds parameters specify the amount of time to wait until the suspending thread of control should run again.

  The seconds and microseconds parameters may not be normalized when the sleep function is called; that is, the microseconds parameter may be greater than 1000000.

  The func_sleep function must return the value of errno on failure and 0 on success.

### See Also

Run-time configuration`

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