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os2: process API for Darwin and most of it for BSDs
This commit is contained in:
Laytan Laats
@@ -0,0 +1,256 @@
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//+build darwin, netbsd, openbsd, freebsd
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package kqueue
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when ODIN_OS == .Darwin {
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foreign import lib "system:System.framework"
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} else {
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foreign import lib "system:c"
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}
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import "base:intrinsics"
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import "core:c"
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import "core:sys/posix"
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KQ :: posix.FD
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kqueue :: proc() -> (kq: KQ, err: posix.Errno) {
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kq = _kqueue()
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if kq == -1 {
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err = posix.errno()
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}
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return
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}
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kevent :: proc(kq: KQ, change_list: []KEvent, event_list: []KEvent, timeout: ^posix.timespec) -> (n_events: c.int, err: posix.Errno) {
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n_events = _kevent(
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kq,
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raw_data(change_list),
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c.int(len(change_list)),
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raw_data(event_list),
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c.int(len(event_list)),
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timeout,
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)
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if n_events == -1 {
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err = posix.errno()
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}
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return
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}
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Flag :: enum _Flags_Backing {
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Add = log2(0x0001), // Add event to kq (implies .Enable).
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Delete = log2(0x0002), // Delete event from kq.
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Enable = log2(0x0004), // Enable event.
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Disable = log2(0x0008), // Disable event (not reported).
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One_Shot = log2(0x0010), // Only report one occurrence.
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Clear = log2(0x0020), // Clear event state after reporting.
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Receipt = log2(0x0040), // Force immediate event output.
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Dispatch = log2(0x0080), // Disable event after reporting.
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Error = log2(0x4000), // Error, data contains errno.
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EOF = log2(0x8000), // EOF detected.
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}
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Flags :: bit_set[Flag; _Flags_Backing]
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Filter :: enum _Filter_Backing {
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Read = _FILTER_READ, // Check for read availability on the file descriptor.
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Write = _FILTER_WRITE, // Check for write availability on the file descriptor.
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AIO = _FILTER_AIO, // Attached to AIO requests.
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VNode = _FILTER_VNODE, // Check for changes to the subject file.
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Proc = _FILTER_PROC, // Check for changes to the subject process.
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Signal = _FILTER_SIGNAL, // Check for signals delivered to the process.
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Timer = _FILTER_TIMER, // Timers.
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}
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RW_Flag :: enum u32 {
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Low_Water_Mark = log2(0x00000001),
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}
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RW_Flags :: bit_set[RW_Flag; u32]
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VNode_Flag :: enum u32 {
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Delete = log2(0x00000001), // Deleted.
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Write = log2(0x00000002), // Contents changed.
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Extend = log2(0x00000004), // Size increased.
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Attrib = log2(0x00000008), // Attributes changed.
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Link = log2(0x00000010), // Link count changed.
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Rename = log2(0x00000020), // Renamed.
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Revoke = log2(0x00000040), // Access was revoked.
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}
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VNode_Flags :: bit_set[VNode_Flag; u32]
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Proc_Flag :: enum u32 {
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Exit = log2(0x80000000), // Process exited.
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Fork = log2(0x40000000), // Process forked.
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Exec = log2(0x20000000), // Process exec'd.
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Signal = log2(0x08000000), // Shared with `Filter.Signal`.
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}
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Proc_Flags :: bit_set[Proc_Flag; u32]
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Timer_Flag :: enum u32 {
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Seconds = log2(0x00000001), // Data is seconds.
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USeconds = log2(0x00000002), // Data is microseconds.
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NSeconds = log2(_NOTE_NSECONDS), // Data is nanoseconds.
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Absolute = log2(_NOTE_ABSOLUTE), // Absolute timeout.
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}
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Timer_Flags :: bit_set[Timer_Flag; u32]
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when ODIN_OS == .Darwin {
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_Filter_Backing :: distinct i16
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_Flags_Backing :: distinct u16
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_FILTER_READ :: -1
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_FILTER_WRITE :: -2
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_FILTER_AIO :: -3
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_FILTER_VNODE :: -4
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_FILTER_PROC :: -5
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_FILTER_SIGNAL :: -6
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_FILTER_TIMER :: -7
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_NOTE_NSECONDS :: 0x00000004
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_NOTE_ABSOLUTE :: 0x00000008
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KEvent :: struct #align(4) {
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// Value used to identify this event. The exact interpretation is determined by the attached filter.
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ident: uintptr,
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// Filter for event.
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filter: Filter,
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// General flags.
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flags: Flags,
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// Filter specific flags.
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fflags: struct #raw_union {
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rw: RW_Flags,
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vnode: VNode_Flags,
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fproc: Proc_Flags,
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// vm: VM_Flags,
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timer: Timer_Flags,
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},
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// Filter specific data.
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data: c.long /* intptr_t */,
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// Opaque user data passed through the kernel unchanged.
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udata: rawptr,
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}
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} else when ODIN_OS == .FreeBSD {
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_Filter_Backing :: distinct i16
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_Flags_Backing :: distinct u16
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_FILTER_READ :: -1
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_FILTER_WRITE :: -2
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_FILTER_AIO :: -3
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_FILTER_VNODE :: -4
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_FILTER_PROC :: -5
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_FILTER_SIGNAL :: -6
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_FILTER_TIMER :: -7
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_NOTE_NSECONDS :: 0x00000004
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_NOTE_ABSOLUTE :: 0x00000008
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KEvent :: struct {
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// Value used to identify this event. The exact interpretation is determined by the attached filter.
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ident: uintptr,
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// Filter for event.
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filter: Filter,
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// General flags.
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flags: Flags,
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// Filter specific flags.
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fflags: struct #raw_union {
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rw: RW_Flags,
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vnode: VNode_Flags,
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fproc: Proc_Flags,
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// vm: VM_Flags,
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timer: Timer_Flags,
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},
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// Filter specific data.
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data: i64,
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// Opaque user data passed through the kernel unchanged.
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udata: rawptr,
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// Extensions.
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ext: [4]u64,
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}
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} else when ODIN_OS == .NetBSD {
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_Filter_Backing :: distinct u32
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_Flags_Backing :: distinct u32
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_FILTER_READ :: 0
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_FILTER_WRITE :: 1
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_FILTER_AIO :: 2
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_FILTER_VNODE :: 3
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_FILTER_PROC :: 4
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_FILTER_SIGNAL :: 5
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_FILTER_TIMER :: 6
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_NOTE_NSECONDS :: 0x00000003
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_NOTE_ABSOLUTE :: 0x00000010
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KEvent :: struct #align(4) {
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// Value used to identify this event. The exact interpretation is determined by the attached filter.
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ident: uintptr,
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// Filter for event.
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filter: Filter,
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// General flags.
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flags: Flags,
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// Filter specific flags.
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fflags: struct #raw_union {
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rw: RW_Flags,
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vnode: VNode_Flags,
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fproc: Proc_Flags,
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// vm: VM_Flags,
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timer: Timer_Flags,
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},
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// Filter specific data.
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data: i64,
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// Opaque user data passed through the kernel unchanged.
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udata: rawptr,
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// Extensions.
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ext: [4]u64,
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}
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} else when ODIN_OS == .OpenBSD {
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_Filter_Backing :: distinct i16
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_Flags_Backing :: distinct u16
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_FILTER_READ :: -1
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_FILTER_WRITE :: -2
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_FILTER_AIO :: -3
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_FILTER_VNODE :: -4
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_FILTER_PROC :: -5
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_FILTER_SIGNAL :: -6
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_FILTER_TIMER :: -7
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_NOTE_NSECONDS :: 0x00000003
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_NOTE_ABSOLUTE :: 0x00000010
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KEvent :: struct #align(4) {
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// Value used to identify this event. The exact interpretation is determined by the attached filter.
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ident: uintptr,
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// Filter for event.
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filter: Filter,
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// General flags.
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flags: Flags,
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// Filter specific flags.
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fflags: struct #raw_union {
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rw: RW_Flags,
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vnode: VNode_Flags,
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fproc: Proc_Flags,
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// vm: VM_Flags,
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timer: Timer_Flags,
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},
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// Filter specific data.
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data: i64,
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// Opaque user data passed through the kernel unchanged.
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udata: rawptr,
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}
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}
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@(private)
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log2 :: intrinsics.constant_log2
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foreign lib {
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@(link_name="kqueue")
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_kqueue :: proc() -> KQ ---
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@(link_name="kevent")
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_kevent :: proc(kq: KQ, change_list: [^]KEvent, n_changes: c.int, event_list: [^]KEvent, n_events: c.int, timeout: ^posix.timespec) -> c.int ---
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}
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