pthread_getschedparam(3T)												 pthread_getschedparam(3T)

NAME
pthread_getschedparam(), pthread_setschedparam() - get or set the scheduling policy and associated parameters SYNOPSIS
PARAMETERS
thread The thread whose scheduling policy and associated parameters are to be set/retrieved. policy This parameter either points to the memory location where the scheduling policy of thread is returned (get function) or it specifies the new value of the scheduling policy for thread (set function). param This parameter either points to the memory location where the scheduling parameters of thread are returned (get function) or it specifies the new scheduling parameters for thread (set function). DESCRIPTION
These functions allow the scheduling policy and associated parameters of threads within a multithreaded process to be retrieved and changed. The legal values for the scheduling policy and associated scheduling parameters are defined in changes the scheduling policy and associated scheduling parameters for thread to the policy and the associated parameters provided in pol- icy and param, respectively. On HP-UX, appropriate privileges are required to change the scheduling parameters of a thread. The calling process must have appropriate privileges or be a member of a group having access to successfully call The function retrieves the scheduling policy and associated parameters for thread and stores those values in policy and param, respec- tively. The values returned represent the actual scheduling values, not any temporary values that may be in effect due to priority inheri- tance or priority ceiling features. Notes For the and scheduling policies, only the sched_priority member of the structure is required in the associated scheduling parameters. All other scheduling policies have implementation-defined scheduling policies. Refer to the documentation for rtsched(2) and for further information on implementation-defined scheduling policies. RETURN VALUE
Upon successful completion, and return zero. Otherwise, an error number is returned to indicate the error (the variable is not set). ERRORS
If any of the following occur, the and functions return the corresponding error number: is not defined and these functions are not supported. For each of the following conditions, if the condition is detected, the function returns the corresponding error number: policy or one of the scheduling parameters in param is invalid. Either the policy or scheduling parameters contain an unsupported value. The caller does not have permission to set either the scheduling policy specified in policy or the scheduling parameters specified in param for thread. No thread could be found corresponding to thread. For each of the following conditions, if the condition is detected, the function returns the corresponding error number: No thread could be found corresponding to thread. The value specified by policy or param is invalid. AUTHOR
and were derived from the IEEE POSIX P1003.1c standard. SEE ALSO
pthread_attr_setschedparam(3T), pthread_attr_setschedpolicy(3T), pthread_attr_getschedparam(3T), pthread_attr_getschedpolicy(3T), rtsched(2). STANDARDS CONFORMANCE
Pthread Library pthread_getschedparam(3T)

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