UTThread.h File Reference

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Classes
class	Thread_t
	Thread class. More...
Typedefs
typedef uint8	thread_priority_t
Functions
thread_id_t	current_thread_id ()
Variables
const thread_priority_t	eTHREADPRI_idle = 1
const thread_priority_t	eTHREADPRI_very_low_min = 2
const thread_priority_t	eTHREADPRI_very_low = 13
const thread_priority_t	eTHREADPRI_low_min = 25
const thread_priority_t	eTHREADPRI_low = 37
const thread_priority_t	eTHREADPRI_normal_min = 50
const thread_priority_t	eTHREADPRI_normal = 62
const thread_priority_t	eTHREADPRI_above_normal_min = 75
const thread_priority_t	eTHREADPRI_above_normal = 87
const thread_priority_t	eTHREADPRI_gui_min = 100
const thread_priority_t	eTHREADPRI_gui = 112
const thread_priority_t	eTHREADPRI_above_gui_min = 125
const thread_priority_t	eTHREADPRI_above_gui = 137
const thread_priority_t	eTHREADPRI_high_min = 150
const thread_priority_t	eTHREADPRI_high = 167
const thread_priority_t	eTHREADPRI_very_high_min = 175
const thread_priority_t	eTHREADPRI_very_high = 187
const thread_priority_t	eTHREADPRI_time_critical_min = 200
const thread_priority_t	eTHREADPRI_real_time_min = 225
const thread_priority_t	eTHREADPRI_kernel_real_time_min = 240

Typedef Documentation

typedef uint8 thread_priority_t

Thread priority. The target platform does not necessarily support a full 8-bit granularity. DO NOT use thread priorities other than normal without good cause, and especially so for the main thread.

The thread priorities are generally as follows:
0: reserved for system idle thread(s), do not use
1: idle
2-24: very low
25-49: low
50-74: normal
75-99: above normal
100-124: GUI responsiveness
125-149: above GUI
150-174: high
175-199: very high
200-224: time critical
225-239: real time
240-255: kernel only real time

Under windows, use of eTHREADPRI_time_critical_min or above can interfere with serial port driver function (the serial port driver will then be running at an equal or lower priority and unable to respond in time, either to service the UART FIFO or to flow off the peer device), eTHREADPRI_kernel_real_time_min-255 should be reserved for kernel threads.