Types and Constants v0.1.0

Types and constants exported by the Bsd package.

Package: Bsd

Standard File Descriptors

Name	Type	Value	Description
`StdIn`	`int32`	`0`	Standard input.
`StdOut`	`int32`	`1`	Standard output.
`StdErr`	`int32`	`2`	Standard error.

A process may close or redirect these conventional descriptors.

Syscall Numbers

These numbers are the same on all four supported BSDs:

Name	Type	Value
`SysExit`	`uint64`	`1`
`SysRead`	`uint64`	`3`
`SysWrite`	`uint64`	`4`
`SysClose`	`uint64`	`6`
`SysBrk`	`uint64`	`17`
`SysGetPid`	`uint64`	`20`
`SysMunmap`	`uint64`	`73`

SysMmap, SysNanosleep, and SysClockGetTime are also exported, but their values are selected for the active target, since they differ between FreeBSD, OpenBSD, NetBSD, and DragonFly BSD.

Memory Protection

Name	Type	Value	Description
`ProtectionNone`	`int32`	`0`	No access.
`ProtectionRead`	`int32`	`1`	Pages may be read.
`ProtectionWrite`	`int32`	`2`	Pages may be written.
`ProtectionExecute`	`int32`	`4`	Pages may be executed.

Mapping Flags

Name	Type	Value	Description
`MapShared`	`int32`	`1`	Create a shared mapping.
`MapPrivate`	`int32`	`2`	Create a private copy-on-write mapping.
`MapFixed`	`int32`	`16`	Place the mapping at the exact address.
`MapAnonymous`	`int32`	`4096`	Create a mapping not backed by a file.

These values are shared by all four supported BSDs.

Clock IDs

Name	Type	Value	Description
`ClockRealtime`	`int32`	`0`	Adjustable wall-clock time.
`ClockMonotonic`	`int32`	`4`/`3`	Monotonic time for interval measurement.

ClockMonotonic is 4 on FreeBSD and DragonFly BSD and 3 on NetBSD and OpenBSD; the package selects the right value for the active target. Use these constants with ClockGetTime.

`Timespec`

struct Timespec {
    seconds: int64;
    nanoseconds: int64;
}

Field	Type	Description
`seconds`	`int64`	Whole seconds.
`nanoseconds`	`int64`	Nanoseconds within the second, normally 0–999,999,999.

Used by Nanosleep and ClockGetTime.