os2: initial implementation for Darwin&BSDs, process API is only thing incomplete

core/os/os2/process_posix.odin

@@ -0,0 +1,69 @@
+//+private
+//+build darwin, netbsd, freebsd, openbsd
+package os2
+
+import "base:runtime"
+import "core:time"
+
+import "core:sys/posix"
+
+_exit :: proc "contextless" (code: int) -> ! {
+	posix.exit(i32(code))
+}
+
+_get_uid :: proc() -> int {
+	return int(posix.getuid())
+}
+
+_get_euid :: proc() -> int {
+	return int(posix.geteuid())
+}
+
+_get_gid :: proc() -> int {
+	return int(posix.getgid())
+}
+
+_get_egid :: proc() -> int {
+	return int(posix.getegid())
+}
+
+_get_pid :: proc() -> int {
+	return int(posix.getpid())
+}
+
+_get_ppid :: proc() -> int {
+	return int(posix.getppid())
+}
+
+_process_info_by_handle :: proc(process: Process, selection: Process_Info_Fields, allocator: runtime.Allocator) -> (info: Process_Info, err: Error) {
+	return _process_info_by_pid(process.pid, selection, allocator)
+}
+
+_current_process_info :: proc(selection: Process_Info_Fields, allocator: runtime.Allocator) -> (info: Process_Info, err: Error) {
+	return _process_info_by_pid(_get_pid(), selection, allocator)
+}
+
+_process_open :: proc(pid: int, flags: Process_Open_Flags) -> (process: Process, err: Error) {
+	err = .Unsupported
+	return
+}
+
+_Sys_Process_Attributes :: struct {}
+
+_process_start :: proc(desc: Process_Desc) -> (process: Process, err: Error) {
+	err = .Unsupported
+	return
+}
+
+_process_wait :: proc(process: Process, timeout: time.Duration) -> (process_state: Process_State, err: Error) {
+	err = .Unsupported
+	return
+}
+
+_process_close :: proc(process: Process) -> Error {
+	return .Unsupported
+}
+
+_process_kill :: proc(process: Process) -> Error {
+	return .Unsupported
+}