Getting Started with QNX Neutrino - QNX Software Systems

© 2009, QNX Software Systems GmbH & Co. KG. Index
behavior if expired 140
changing resolution 140
CLOCK_MONOTONIC 147
CLOCK_REALTIME 146
CLOCK_SOFTTIME 146
ClockPeriod() 158
converting time formats 148
creating 146
creating a thread 143, 144
creating threads on expiry 142
creating threads on trigger 157
delivering a pulse 143
delivering a signal 143
diagram showing big picture 139
drift 139
flags 147
getting and setting the realtime clock 157
hardware divider 139
hardware divisor 139
implementation 138, 142, 149, 165
improving accuracy 158
inactivity shutdown 156
jitter 140, 141
diagram 140
kernel timeouts 165
limits on base timing resolution 159
one-shot 141, 148
example 148
periodic 141, 148
and server maintenance 156
and servers 149
example 149
polling 156
preemption 140
pulse versus signal 146
pulses 116, 142, 143, 149, 151–154
putting a thread on hold 138
readying a thread 140, 165
relative 141, 147, 165
defined 332
example 148, 149, 151–154
repeating
defined 332
resolving 140
scheduling an event in the future 141
sending a signal 144
specifying code number 144
specifying signal number 144
setting type 147
SIGALRM 157
SIGEV_THREAD 143
signals 142, 157
specifying a signal 157
SIGUSR1 157
specifying sub-second values 148
starting 147
struct itimerspec 147, 148
struct sigevent 142
struct timespec 147, 148
timeout notification 142
by pulse 145
by signal 146
TIMER_ABSTIME 147
timer_create() 146
timer_settime() 147
types 141, 147, 148
usage examples 149
using 146
using pulses with servers 145
warm-up timer 156
TIMER_ABSTIME 147
timer_create() 146, 147, 152
example 152
flags argument 147
signal example 157
timer_settime() 147, 149, 152
andTIMER_ABSTIME 147
example 152
TimerTimeout() 100, 119, 163–165, 289
andCLOCK_REALTIME 163
example 163–165
specifying multiple kernel states 165
timeslice 22
timestamps 159
timing
busy wait 138
fine grained 138
high accuracy 159
hogging CPU 138
using ClockCycles() 159
tips
broadcast versus signal 65
April 30, 2009 Index 371