ChorusOS 5.0 Features and Architecture Overview

Appendix A Optional ChorusOS Operating System Components

This Appendix lists the optional features of the ChorusOS operating system, broken down according to function.

The following table shows the optional component groups.

Table A-1 Optional Operating System Components


Component		Name
Actor management
	User-mode extension support	`USER_MODE`
	Dynamic libraries	`DYNAMIC_LIB`
	Compressed file management	`GZ_FILE`
Scheduling
	FIFO scheduling	`SCHED_FIFO`
	Multi-class scheduling	`SCHED_CLASS`
	Round robin scheduling class	`SCHED_CLASS_RR`
	Real-time scheduling class	`SCHED_CLASS_RT`
Memory management
	Virtual (user and supervisor) address space	`VIRTUAL_ADDRESS_SPACE`
	On-demand paging	`ON_DEMAND_PAGING`
System Instrumentation
	Microkernel statistics	`MKSTAT`
	Solaris system events	`SOLARIS_SYSEVENTS`
	Operating system gauges	`OS_GAUGES`
High Availability
	Hot restart	`HOT_RESTART`
	Watchdog timer	`WDT`
	Black box	`BLACKBOX`
	System dump	`SYSTEM_DUMP`
Inter-thread synchronization
	Semaphores	`SEM`
	Event flag sets	`EVENT`
	Mutexes	`MUTEX`
	Mutual exclusion locks supporting thread priority inversion avoidance	`RTMUTEX`
Management
	Periodic timers	`TIMER`
	Thread and actor virtual timer	`VTIMER`
	Date and time of day	`DATE`
	Real-time clock	`RTC`
	Environment variables	`ENV`
Inter-thread communication
	Location-transparent inter-process communication	`IPC`
	Remote (inter-site) IPC support	`IPC_REMOTE`
	Mailbox-based communications mechanism	`MIPC`
	Inter-thread synchronization	`MONITOR`
	POSIX I/O system calls	`POSIX-FILEIO`
	POSIX semaphores	`POSIX-SEM`
	POSIX sockets	`POSIX_SOCKETS`
	POSIX threads	`POSIX-THREADS`
	POSIX timers	`POSIX-TIMERS`
	POSIX message queues	`POSIX_MQ`
	POSIX shared memory objects	`POSIX_SHM`
	POSIX real-time signals	`POSIX_REALTIME_SIGNALS`
	Private per-thread data	`PRIVATE-DATA`
	Local name server for LAP binding	`LAPBIND`
	LAP validity-check option	`LAPSAFE`
Tools support
	System logging	`SYSLOG`
	Message logging	`LOG`
	Profiling and benchmark support	`PERF`
	System monitoring	`MON`
	System debugging	`DEBUG_SYSTEM`
	Core dump	`CORE_DUMP`
C_INIT
	Basic command interpreter on target	`LOCAL_CONSOLE`
	Remote shell	`RSH`
File system options
	Named pipes	`FIFOFS`
	NFS client	`NFS_CLIENT`
	NFS server	`NFS_SERVER`
	MS-DOS file system	`MSDOSFS`
	PDE file system	`PDEVFS`
	`/proc` file system	`PROCFS`
	UFS file system	`UFS`
	ISO9000 file system	`ISOFS`
I/O management
	`/dev/mem`, `/dev/kmem`, `/dev/zero`	`DEV_MEM`
	Support for RAM disk	`RAM_DISK`
	Chorus Mapper (supports virtual memory only)	FS_MAPPER
	Support for FLASH media	`FLASH`
	Access raw memory device	`RAWFLASH`
	Virtual TTY	`VTTY`
	Driver for SCSI disk	`SCSI_DISK`
	NVRAM device	`DEV_NVRAM`
	CD-ROM device	`DEV_CDROM`
Networking
	POSIX 1003.1g-compliant sockets	`POSIX_SOCKETS`
	Point-to-point protocols	`PPP`
	Local sockets and pipes (used by `POSIX_SOCKETS`)	`AF_LOCAL`
	Socket routing (used by `POSIX_SOCKETS`)	`AF_ROUTE`
	IPv4 sockets (used by `POSIX_SOCKETS`)	`AF_INET`
	IPv6 sockets (used by the `IPV6` feature)	`AF_INET6`
	Internet Protocol version 6	`IPV6`
	Berkley Packet Filter	`BPF`
	Support for OSI	`IOM_OSI`
	Support for IPC	`IOM_IPC`
	Network Time Protocol	`NTP`