Query: pthread_attr_getschedparam
OS: centos
Section: 3p
Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar
PTHREAD_ATTR_GETSCHEDPARAM(3P) POSIX Programmer's Manual PTHREAD_ATTR_GETSCHEDPARAM(3P)PROLOGThis manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.NAMEpthread_attr_getschedparam, pthread_attr_setschedparam - get and set the schedparam attributeSYNOPSIS#include <pthread.h> int pthread_attr_getschedparam(const pthread_attr_t *restrict attr, struct sched_param *restrict param); int pthread_attr_setschedparam(pthread_attr_t *restrict attr, const struct sched_param *restrict param);DESCRIPTIONThe pthread_attr_getschedparam(), and pthread_attr_setschedparam() functions, respectively, shall get and set the scheduling parameter attributes in the attr argument. The contents of the param structure are defined in the <sched.h> header. For the SCHED_FIFO and SCHED_RR policies, the only required member of param is sched_priority. For the SCHED_SPORADIC policy, the required members of the param structure are sched_priority, sched_ss_low_priority, sched_ss_repl_period, sched_ss_init_budget, and sched_ss_max_repl. The specified sched_ss_repl_period must be greater than or equal to the specified sched_ss_init_budget for the function to succeed; if it is not, then the function shall fail. The value of sched_ss_max_repl shall be within the inclusive range [1, {SS_REPL_MAX}] for the function to succeed; if not, the function shall fail.RETURN VALUEIf successful, the pthread_attr_getschedparam() and pthread_attr_setschedparam() functions shall return zero; otherwise, an error number shall be returned to indicate the error.ERRORSThe pthread_attr_setschedparam() function may fail if: EINVAL The value of param is not valid. ENOTSUP An attempt was made to set the attribute to an unsupported value. These functions shall not return an error code of [EINTR]. The following sections are informative.EXAMPLESNone.APPLICATION USAGEAfter these attributes have been set, a thread can be created with the specified attributes using pthread_create(). Using these routines does not affect the current running thread.RATIONALENone.FUTURE DIRECTIONSNone.SEE ALSOpthread_attr_destroy(), pthread_attr_getscope(), pthread_attr_getinheritsched(), pthread_attr_getschedpolicy(), pthread_create(), the Base Definitions volume of IEEE Std 1003.1-2001, <pthread.h>, <sched.h>COPYRIGHTPortions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .IEEE/The Open Group 2003 PTHREAD_ATTR_GETSCHEDPARAM(3P)
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