:orphan:

.. title:: CONFIG_NUM_COOP_PRIORITIES

.. kconfig:: CONFIG_NUM_COOP_PRIORITIES

CONFIG_NUM_COOP_PRIORITIES
##########################

*Number of coop priorities*

Type: ``int``

Help
====

.. code-block:: none

    Number of cooperative priorities configured in the system. Gives access
    to priorities:

          K_PRIO_COOP(0) to K_PRIO_COOP(CONFIG_NUM_COOP_PRIORITIES - 1)

    or seen another way, priorities:

          -CONFIG_NUM_COOP_PRIORITIES to -1

    This can be set to zero to disable cooperative scheduling. Cooperative
    threads always preempt preemptible threads.

    The total number of priorities is

     NUM_COOP_PRIORITIES + NUM_PREEMPT_PRIORITIES + 1

    The extra one is for the idle thread, which must run at the lowest
    priority, and be the only thread at that priority.

Defaults
========

- 1 if !\ :kconfig:`MULTITHREADING <CONFIG_MULTITHREADING>`
- 16

Kconfig definition
==================



At ``<Zephyr Kernel>/Kconfig:26``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:40``

Menu path: (Top) → General Kernel Options → Multi-threading

.. code-block:: kconfig

    config NUM_COOP_PRIORITIES
    	int "Number of coop priorities" if MULTITHREADING
    	range 0 128
    	default 1 if !MULTITHREADING
    	default 16
    	help
    	  Number of cooperative priorities configured in the system. Gives access
    	  to priorities:
	  
    	        K_PRIO_COOP(0) to K_PRIO_COOP(CONFIG_NUM_COOP_PRIORITIES - 1)
	  
    	  or seen another way, priorities:
	  
    	        -CONFIG_NUM_COOP_PRIORITIES to -1
	  
    	  This can be set to zero to disable cooperative scheduling. Cooperative
    	  threads always preempt preemptible threads.
	  
    	  The total number of priorities is
	  
    	   NUM_COOP_PRIORITIES + NUM_PREEMPT_PRIORITIES + 1
	  
    	  The extra one is for the idle thread, which must run at the lowest
    	  priority, and be the only thread at that priority.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*