QNX Community Resources
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Keywords - P
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- parallel devices
-
·
Parallel devices ·
- throughput, maximizing
- · Parallel devices ·
- parallel ports
-
- determining if port is available
- · Parallel devices ·
- parent directory
- · Directory links ·
- parent processes
-
- effects of death on children
- · Execution ·
- parity error, signal generated
- · Summary of signals ·
- partitions
-
·
OS partitions ·
- bitmap
- · Bitmap ·
- creating, modifying, or deleting
- · OS partitions ·
- DOS partitions
- · The DOS Filesystem Manager ·
- flagging as bootable
- · OS partitions ·
- key components
- · Key components of a QNX partition ·
- loader block
- · Loader block ·
- primary partitions, number per disk
- · OS partitions ·
- root block
- · Root block ·
- root directory, special characteristics
- · Root directory ·
- types
- · OS partitions ·
See also filesystem
- passing names to other processes
- · Passing pathnames between processes ·
- pathname prefix tree
- · Prefixes and regions of authority ·
- pathname space
-
- location
- · I/O namespace ·
- regions of authority
- · Prefixes and regions of authority ·
- pathnames
-
·
Directories ·
- converting relative pathnames to network pathnames
- · Relative pathnames ·
- network pathnames
- · Network root ·
- network pathnames, displaying
- · A note about cd ·
- resolving
- · I/O manager prefixes ·
- pending signals
- · Receiving signals ·
- performance
-
- device subsystem
- · Device subsystem performance ·
- fast interactive response via adaptive scheduling
- · Adaptive scheduling ·
- Filesystem Manager
- · Filesystem Manager performance ·
- network throughput
- · Load balancing ·
- realtime
- · A word about realtime performance ·
- permissions
- · File access ·
- Photon
-
- architecture differs from X Window System
- · A graphical microkernel ·
- architecture similar to that of OS microkernel
- · A graphical microkernel ·
- event space
- · The Photon event space ·
- event types
- · Events ·
- graphics drivers
- · Graphics drivers · Multiple graphics drivers ·
- microkernel runs as tiny process
- · A graphical microkernel ·
- regions
- · Regions ·
- widgets
- · Widget building toolkit · Widget library ·
- window manager
- · The Photon Window Manager ·
- physical node IDs
- · Physical node ID ·
- Pipe Manager
- · Pipes ·
- pipes
-
·
Pipes ·
What is a file? ·
- creating
- · Pipes ·
- effect of writing on a pipe with no readers
- · Summary of signals ·
See also FIFOs
- polling the network
- · Logical node ID ·
- prefix
-
·
Prefixes and regions of authority ·
- aliases
- · Alias prefixes ·
- tree
-
·
Prefixes and regions of authority ·
- displaying
- · I/O manager prefixes ·
- managed as a list of prefixes
- · I/O manager prefixes ·
- prefix (utility)
- · I/O manager prefixes ·
- priorities
-
·
Process priorities ·
- determining
- · Process priorities ·
- setting
- · Process priorities ·
- process control environments
- · Single-computer model ·
- Process Manager
-
- general responsibilities
- · Process Manager responsibilities ·
- process name locator
- · Process symbolic names ·
- process names
-
- attaching
- · Process symbolic names ·
- global names
- · Process symbolic names ·
- local names
- · Process symbolic names ·
- locating processes by name
- · Process symbolic names ·
- reducing potential name conflicts
- · Process symbolic names ·
- process states
-
- DEAD
- · Process states ·
- determining
- · Determining process states ·
- HELD
- · Process states ·
- READY
- · Process states ·
- RECEIVE-blocked
- · Blocked states · Process states ·
- REPLY-blocked
- · Blocked states · Process states ·
- SEMAPHORE-blocked
- · Process states ·
- SEND-blocked
- · Blocked states · Process states ·
- SIGNAL-blocked
- · Process states · Signals and messages ·
- WAIT-blocked
- · Process states ·
- processes
-
- catching signals
- · Catching signals ·
- child processes
-
- creating
- · spawn() ·
- inheriting environment
- · Process inheritance ·
- running concurrently with parents
- · Execution ·
- children becoming zombies
- · Termination ·
- cooperating
-
·
Process symbolic names ·
- via messages
- · Message-passing primitives ·
- via pipes and FIFOs
- · Pipes ·
- creating
- · Creation ·
- creating on any node
- · spawn() ·
- creation primitives
- · Process creation primitives ·
- death of parent process, effects on children
- · Execution ·
- death of session leader, signal generated
- · Summary of signals ·
- executing
- · Execution ·
- executing on remote nodes
- · Default network root ·
- inheritance
- · Process inheritance ·
- life cycle
- · The life cycle of a process ·
- loading
- · Loading ·
- locating
- · Process symbolic names ·
- locating by name
- · Process symbolic names ·
- names (symbolic)
- · Process symbolic names ·
- opening a file
- · I/O manager prefixes ·
- opening the same file twice
- · Open control blocks ·
- orphan processes
- · Execution ·
- parent processes, death of
- · Execution ·
- passing names to
- · Passing pathnames between processes ·
- primitives
- · Process creation primitives ·
- priorities
-
- determining
- · Process priorities ·
- setting
- · Process priorities ·
- remote execution
- · Default network root ·
- scheduling
-
·
When scheduling decisions are made ·
- adaptive method
- · Adaptive scheduling ·
- client-driven method
- · Client-driven priority ·
- FIFO method
- · FIFO scheduling ·
- round-robin method
- · Round-robin scheduling ·
- signal generated upon death of session leader
- · Summary of signals ·
- signals
-
- catching
- · Catching signals ·
- effects of
- · Receiving signals ·
- receiving
- · Receiving signals ·
- states
-
·
Process states ·
- determining
- · Determining process states ·
- symbolic names
- · Process symbolic names ·
- synchronizing via message passing
- · Process synchronization ·
- system processes
- · System processes ·
- termination
-
·
Termination ·
- by a signal
- · Termination ·
- effect on virtual circuits
- · Virtual circuits ·
- effects of
- · Termination ·
- virtual
- · Virtual processes ·
- zombie
- · Process states · Termination ·
- proxies
-
- creating
- · IPC via proxies ·
- processes that can use a proxy
- · IPC via proxies ·
- purpose of
- · Interprocess communication · IPC via proxies ·
- used by interrupt handlers
- · IPC via proxies ·
- virtual
- · Virtual proxies ·
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