From ea23217751c474140c7b46cbffa796a2f93f3ffb Mon Sep 17 00:00:00 2001
From: Bill Nagel <bill@axzez.com>
Date: Sat, 17 Sep 2022 06:57:58 -0400
Subject: [PATCH] enable event loop for ios, tvos, and watchos

---
 lib/std/event/loop.zig | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/lib/std/event/loop.zig b/lib/std/event/loop.zig
index 038ead12b5..7350a06607 100644
--- a/lib/std/event/loop.zig
+++ b/lib/std/event/loop.zig
@@ -69,7 +69,7 @@ pub const Loop = struct {
         };
 
         pub const EventFd = switch (builtin.os.tag) {
-            .macos, .freebsd, .netbsd, .dragonfly, .openbsd => KEventFd,
+            .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly, .openbsd => KEventFd,
             .linux => struct {
                 base: ResumeNode,
                 epoll_op: u32,
@@ -88,7 +88,7 @@ pub const Loop = struct {
         };
 
         pub const Basic = switch (builtin.os.tag) {
-            .macos, .freebsd, .netbsd, .dragonfly, .openbsd => KEventBasic,
+            .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly, .openbsd => KEventBasic,
             .linux => struct {
                 base: ResumeNode,
             },
@@ -269,7 +269,7 @@ pub const Loop = struct {
                     self.extra_threads[extra_thread_index] = try Thread.spawn(.{}, workerRun, .{self});
                 }
             },
-            .macos, .freebsd, .netbsd, .dragonfly => {
+            .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly => {
                 self.os_data.kqfd = try os.kqueue();
                 errdefer os.close(self.os_data.kqfd);
 
@@ -457,7 +457,7 @@ pub const Loop = struct {
                 while (self.available_eventfd_resume_nodes.pop()) |node| os.close(node.data.eventfd);
                 os.close(self.os_data.epollfd);
             },
-            .macos, .freebsd, .netbsd, .dragonfly, .openbsd => {
+            .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly, .openbsd => {
                 os.close(self.os_data.kqfd);
             },
             .windows => {
@@ -552,7 +552,7 @@ pub const Loop = struct {
             .linux => {
                 self.linuxWaitFd(fd, os.linux.EPOLL.ET | os.linux.EPOLL.ONESHOT | os.linux.EPOLL.IN);
             },
-            .macos, .freebsd, .netbsd, .dragonfly, .openbsd => {
+            .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly, .openbsd => {
                 self.bsdWaitKev(@intCast(usize, fd), os.system.EVFILT_READ, os.system.EV_ONESHOT);
             },
             else => @compileError("Unsupported OS"),
@@ -564,7 +564,7 @@ pub const Loop = struct {
             .linux => {
                 self.linuxWaitFd(fd, os.linux.EPOLL.ET | os.linux.EPOLL.ONESHOT | os.linux.EPOLL.OUT);
             },
-            .macos, .freebsd, .netbsd, .dragonfly, .openbsd => {
+            .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly, .openbsd => {
                 self.bsdWaitKev(@intCast(usize, fd), os.system.EVFILT_WRITE, os.system.EV_ONESHOT);
             },
             else => @compileError("Unsupported OS"),
@@ -576,7 +576,7 @@ pub const Loop = struct {
             .linux => {
                 self.linuxWaitFd(fd, os.linux.EPOLL.ET | os.linux.EPOLL.ONESHOT | os.linux.EPOLL.OUT | os.linux.EPOLL.IN);
             },
-            .macos, .freebsd, .netbsd, .dragonfly, .openbsd => {
+            .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly, .openbsd => {
                 self.bsdWaitKev(@intCast(usize, fd), os.system.EVFILT_READ, os.system.EV_ONESHOT);
                 self.bsdWaitKev(@intCast(usize, fd), os.system.EVFILT_WRITE, os.system.EV_ONESHOT);
             },
@@ -645,7 +645,7 @@ pub const Loop = struct {
             const eventfd_node = &resume_stack_node.data;
             eventfd_node.base.handle = next_tick_node.data;
             switch (builtin.os.tag) {
-                .macos, .freebsd, .netbsd, .dragonfly, .openbsd => {
+                .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly, .openbsd => {
                     const kevent_array = @as(*const [1]os.Kevent, &eventfd_node.kevent);
                     const empty_kevs = &[0]os.Kevent{};
                     _ = os.kevent(self.os_data.kqfd, kevent_array, empty_kevs, null) catch {
@@ -708,6 +708,9 @@ pub const Loop = struct {
             switch (builtin.os.tag) {
                 .linux,
                 .macos,
+                .ios,
+                .tvos,
+                .watchos,
                 .freebsd,
                 .netbsd,
                 .dragonfly,
@@ -802,7 +805,7 @@ pub const Loop = struct {
                     }
                     return;
                 },
-                .macos, .freebsd, .netbsd, .dragonfly, .openbsd => {
+                .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly, .openbsd => {
                     const final_kevent = @as(*const [1]os.Kevent, &self.os_data.final_kevent);
                     const empty_kevs = &[0]os.Kevent{};
                     // cannot fail because we already added it and this just enables it
@@ -1428,7 +1431,7 @@ pub const Loop = struct {
                         }
                     }
                 },
-                .macos, .freebsd, .netbsd, .dragonfly, .openbsd => {
+                .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly, .openbsd => {
                     var eventlist: [1]os.Kevent = undefined;
                     const empty_kevs = &[0]os.Kevent{};
                     const count = os.kevent(self.os_data.kqfd, empty_kevs, eventlist[0..], null) catch unreachable;
@@ -1554,7 +1557,7 @@ pub const Loop = struct {
 
     const OsData = switch (builtin.os.tag) {
         .linux => LinuxOsData,
-        .macos, .freebsd, .netbsd, .dragonfly, .openbsd => KEventData,
+        .macos, .ios, .tvos, .watchos, .freebsd, .netbsd, .dragonfly, .openbsd => KEventData,
         .windows => struct {
             io_port: windows.HANDLE,
             extra_thread_count: usize,