Types and Constants v0.1.0

Types and constants exported by the MacOS package.

Package: MacOS

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

Darwin partitions syscall numbers by class: Unix/BSD calls carry the class bits UnixSyscallClass (0x02000000), so each exported number is the class OR'd with the bare ordinal.

Name	Value
`UnixSyscallClass`	`0x02000000`
`SysExit`	`UnixSyscallClass \| 1`
`SysRead`	`UnixSyscallClass \| 3`
`SysWrite`	`UnixSyscallClass \| 4`
`SysClose`	`UnixSyscallClass \| 6`
`SysGetPid`	`UnixSyscallClass \| 20`
`SysMunmap`	`UnixSyscallClass \| 73`
`SysGetTimeOfDay`	`UnixSyscallClass \| 116`
`SysMmap`	`UnixSyscallClass \| 197`

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.

`Timeval`

struct Timeval {
    seconds: int64;
    microseconds: int32;
}

Field	Type	Description
`seconds`	`int64`	Whole seconds since the Unix epoch.
`microseconds`	`int32`	Microseconds within the second, 0–999,999.

Filled by GetTimeOfDay.