musl/src/thread/pthread_attr_getschedparam.c

#include "pthread_impl.h"

int pthread_attr_getschedparam(const pthread_attr_t *restrict a, struct sched_param *restrict param)
{
	param->sched_priority = a->_a_prio;
	return 0;
}
implement dummy pthread_attr_[gs]etschedparam functions for some reason these functions are not shaded by the PS/TPS option in POSIX, so presumably they are mandatory, even though the functionality they offer is optional. for now, provide them in case any programs depend on their existence, but disallow any priority except the default. 2011-03-11 09:51:54 -05:00			`#include "pthread_impl.h"`

use restrict everywhere it's required by c99 and/or posix 2008 to deal with the fact that the public headers may be used with pre-c99 compilers, __restrict is used in place of restrict, and defined appropriately for any supported compiler. we also avoid the form [restrict] since older versions of gcc rejected it due to a bug in the original c99 standard, and instead use the form *restrict. 2012-09-06 22:44:55 -04:00			`int pthread_attr_getschedparam(const pthread_attr_t restrict a, struct sched_param restrict param)`
implement dummy pthread_attr_[gs]etschedparam functions for some reason these functions are not shaded by the PS/TPS option in POSIX, so presumably they are mandatory, even though the functionality they offer is optional. for now, provide them in case any programs depend on their existence, but disallow any priority except the default. 2011-03-11 09:51:54 -05:00			`{`
add support for thread scheduling (POSIX TPS option) linux's sched_* syscalls actually implement the TPS (thread scheduling) functionality, not the PS (process scheduling) functionality which the sched_* functions are supposed to have. omitting support for the PS option (and having the sched_* interfaces fail with ENOSYS rather than omitting them, since some broken software assumes they exist) seems to be the only conforming way to do this on linux. 2012-11-11 15:38:04 -05:00			`param->sched_priority = a->_a_prio;`
implement dummy pthread_attr_[gs]etschedparam functions for some reason these functions are not shaded by the PS/TPS option in POSIX, so presumably they are mandatory, even though the functionality they offer is optional. for now, provide them in case any programs depend on their existence, but disallow any priority except the default. 2011-03-11 09:51:54 -05:00			`return 0;`
			`}`