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OpenSolaris 2009.06 - man page for pthread_setschedparam (opensolaris section 3c)

pthread_getschedparam(3C)				   Standard C Library Functions 				 pthread_getschedparam(3C)

pthread_getschedparam, pthread_setschedparam - access dynamic thread scheduling parameters
cc -mt [ flag... ] file... -lpthread [ library... ] #include <pthread.h> int pthread_getschedparam(pthread_t thread, int *restrict policy, struct sched_param *restrict param); int pthread_setschedparam(pthread_t thread, int policy, const struct sched_param *param);
The pthread_getschedparam() and pthread_setschedparam() functions allow the scheduling policy and scheduling parameters of individual threads within a multithreaded process to be retrieved and set. Supported policies are : SCHED_OTHER traditional time-sharing scheduling class SCHED_FIFO real-time class: run to completion SCHED_RR real-time class: round-robin SCHED_IA interactive time-sharing class SCHED_FSS fair-share scheduling class SCHED_FX fixed priority scheduling class See pthreads(5). The affected scheduling parameter is the sched_priority member of the sched_param structure. The pthread_getschedparam() function retrieves the scheduling policy and scheduling parameters for the thread whose thread ID is given by thread and stores those values in policy and param, respectively. The priority value returned from pthread_getschedparam() is the value specified by the most recent pthread_setschedparam() or pthread_create() call affecting the target thread, and does not reflect any tempo- rary adjustments to its priority as a result of any priority inheritance or ceiling functions. The pthread_setschedparam() function sets the scheduling policy and associated scheduling parameters for the thread whose thread ID is given by thread to the policy and associated parameters provided in policy and param, respectively. If the pthread_setschedparam() function fails, no scheduling parameters will be changed for the target thread.
If successful, the pthread_getschedparam() and pthread_setschedparam() functions return 0. Otherwise, an error number is returned to indi- cate the error.
The pthread_getschedparam() and pthread_gsetschedparam() functions will fail if: ESRCH The value specified by thread does not refer to an existing thread. The pthread_setschedparam() function will fail if: EINVAL The value specified by policy or one of the scheduling parameters associated with the scheduling policy policy is invalid. EPERM The caller does not have the appropriate permission to set either the scheduling parameters or the scheduling policy of the spec- ified thread.
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ |Standard |See standards(5). | +-----------------------------+-----------------------------+
pthread_attr_init(3C), sched_getparam(3C), sched_get_priority_max(3C)sched_get_priority_max(3C), sched_get_priority_min(3C), sched_set- param(3C), sched_getscheduler(3C), sched_setscheduler(3C), attributes(5), pthreads(5), standards(5) SunOS 5.11 1 Apr 2008 pthread_getschedparam(3C)

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