System Calls Possible from Task-Independent Portion and Dispatching Prohibited State
The following system calls should run even if they are issued from task-independent portion and dispatch disabled state.
tk_sta_tsk Start task
tk_wup_tsk Wakeup task
tk_rel_wai Release wait
tk_sus_tsk Suspend task
tk_sig_sem Signal semaphore
tk_set_flg Set event flag
tk_rot_rdq Rotate task queue
tk_get_tid Get task ID
tk_sta_cyc Start cyclic handler
tk_stp_cyc Stop cyclic handler
tk_sta_alm Start alarm handler
tk_stp_alm Stop alarm handler
tk_ref_tsk Reference task status
tk_ref_cyc Reference cyclic handler status
tk_ref_alm Reference alarm handler status
tk_ref_sys Reference system status
tk_ret_int Return from interrupt handler
Also, the following system calls should run in the same way as those issued from dispatch enabled state (also, never return “E_CTX”) even if they are issued from dispatch disabled state.
tk_fwd_por Forward rendezvous to other port
tk_rpl_rdv Reply rendezvous
If system calls besides these are issued from task-independent portion and dispatch disabled state, the behavior shall be implementation-defined.
[Difference with T-Kernel]
tk_sig_tev does not exist in the list of system calls which are allowed to be executed from task-independent portion and dispatch disabled state. This is because this system call does not exist in µT-Kernel.
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