Kernel

Date of this edition: August 15, 2025

Name Status Alternative Notes
C Library Reference functions:
  • nap()
  • napms()
  • pthread_sleepon_broadcast()
  • pthread_sleepon_lock()
  • pthread_sleepon_signal()
  • pthread_sleepon_timedwait()
  • pthread_sleepon_unlock()
  • pthread_sleepon_wait()
  • _sleepon_broadcast()
  • _sleepon_destroy()
  • _sleepon_init()
  • _sleepon_lock()
  • _sleepon_signal()
  • _sleepon_unlock()
  • _sleepon_wait()
 Discontinued delay()
C Library Reference Interrupt functions:
  • InterruptAttach()
  • InterruptAttachArray()
  • InterruptHookIdle2()
  • InterruptHookTrace()
 Discontinued
  • InterruptAttachThread() and InterruptAttachEvent() can be used as alternatives for InterruptAttach().
  • InterruptHookIdle2() is replaced by a new design for suspending and resuming cores.
/dev/mem Discontinued N/A If you’re porting old code that used /dev/mem, the best path forward is:
  • Replace /dev/mem usage with mmap_device_memory()
  • Use proper driver/resource manager abstraction
  • If you’re working with MMIO, request I/O privileges and use mmap_device_memory to safely map registers
iofunc_lock_calloc() Discontinued N/A
iofunc_lock_free() Discontinued N/A
Legacy Kernel Features
  • Mutex events:
    • SyncMutexEvent()
    • SyncMutexEvent_r()
    • SyncMutexRevive()
    • SyncMutexRevive_r()
  • Guardian Process
  • ThreadCreate()
  • Global Channels
  • On demand paging
  • Lazy FPU switching
  • Persistent Threads
  • Idle hook implementation:
    • PowerSetActive()
    • PowerGetActive()
    • PowerParameter()
    • Structures related power management
  • mq
 Discontinued
  • POSIX robust mutexes
  • N/A
  • pthread_create()
  • N/A
  • N/A
  • N/A
  • N/A
  • N/A
  • mqueue
 The threadCreate() function is still the kernel call to create a new thread. However, its direct use as an alternative to pthread_create() is deprecated. For QNX SDP 8.0, all calls to create a new thread should use pthread_create(), which is a standard POSIX function wrapping QNX's own ThreadCreate().
MsgKeyData()/MsgKeyData_r() Discontinued N/A
MsgReceivePulsev()/MsgReceivePulsev_r() Discontinued N/A
PROCMGR_AID_XTHREAD_THREADCTL Discontinued N/A ThreadCtlExt() and ThreadCtlExt_r() no longer require this ability.
PROCMGR_AID_CLOCKPERIOD Discontinued N/A Set clock period with a command-line option to procnto, rather than at runtime.
PROCMGR_AID_V86 Discontinued N/A Requires x86_32, which is no longer supported.
PROCMGR_AID_KEYDATA Discontinued N/A MsgKeyData() was removed for enhanced security.
posix_spawnattr_getrunmask() Deprecated pthread_spawnattr_getrunmask_np()
posix_spawnattr_setrunmask() Deprecated pthread_spawnattr_setrunmask_np()
Signal functions:
  • sigblock()
  • sigpause()
  • sigsetmask()
  • sigunblock()
 Discontinued sigprocmask() These were BSD functions that supported only 32-bit signals.
TraceEvent() classes:
  • _NTO_TRACE_INTENTER
  • _NTO_TRACE_INTEXIT
  • _NTO_TRACE_INT_HANDLER_ENTER
  • _NTO_TRACE_INT_HANDLER_EXIT
 Discontinued _NTO_TRACE_INT Discontinued in 8.0
TraceEvent() events:
  • __KER_SCHED_WAYPOINT
  • __KER_CACHE_FLUSH
  • __KER_CHANCON_ATTR
  • __KER_THREAD_DESTROYALL
 Discontinued N/A Discontinued in 8.0
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