Thread attributes are utilized only at thread creation time.
stack address
is the address of the optionally user specified stack area for this thread.
If this value is NULL, then RTEMS allocates the memory for the thread stack
from the RTEMS Workspace Area. Otherwise, this is the user specified
address for the memory to be used for the thread's stack. Each thread must
have a distinct stack area. Each processor family has different alignment
rules which should be followed.
stack size
is the minimum desired size for this thread's stack area.
If the size of this area as specified by the stack size attribute
is smaller than the minimum for this processor family and the stack
is not user specified, then RTEMS will automatically allocate a
stack of the minimum size for this processor family.
contention scope
specifies the scheduling contention scope. RTEMS only supports the
PTHREAD_SCOPE_PROCESS scheduling contention scope.
scheduling inheritance
specifies whether a user specified or the scheduling policy and
parameters of the currently executing thread are to be used. When
this is PTHREAD_INHERIT_SCHED, then the scheduling policy and
parameters of the currently executing thread are inherited by
the newly created thread.
scheduling policy and parameters
specify the manner in which the thread will contend for the processor.
The scheduling parameters are interpreted based on the specified policy.
All policies utilize the thread priority parameter.
RTEMS POSIX API User's Guide