freebsd_amd64 support

core/sync/sync2/futex_freebsd.odin

@@ -0,0 +1,75 @@
+//+private
+//+build freebsd
+package sync2
+
+import "core:c"
+import "core:os"
+import "core:time"
+
+UMTX_OP_WAIT :: 2
+UMTX_OP_WAKE :: 3
+
+foreign import libc "system:c"
+
+foreign libc {
+	_umtx_op :: proc "c" (obj: rawptr, op: c.int, val: c.ulong, uaddr: rawptr, uaddr2: rawptr) -> c.int ---
+}
+
+_futex_wait :: proc(f: ^Futex, expected: u32) -> bool {
+	timeout := os.Unix_File_Time{
+		seconds = 5,
+		nanoseconds = 0,
+	}
+
+	for {
+		res := _umtx_op(f, UMTX_OP_WAIT, c.ulong(expected), nil, &timeout)
+
+		if res != -1 {
+			return true
+		}
+
+		if os.Errno(os.get_last_error()) == os.ETIMEDOUT {
+			continue
+		}
+
+		panic("_futex_wait failure")
+	}
+	unreachable()
+}
+
+_futex_wait_with_timeout :: proc(f: ^Futex, expected: u32, duration: time.Duration) -> bool {
+	if duration <= 0 {
+		return false
+	}
+
+	res := _umtx_op(f, UMTX_OP_WAIT, c.ulong(expected), nil, &os.Unix_File_Time{
+		seconds = (os.time_t)(duration/1e9),
+		nanoseconds = (c.long)(duration%1e9),
+	})
+
+	if res != -1 {
+		return true
+	}
+
+	if os.Errno(os.get_last_error()) == os.ETIMEDOUT {
+		return false
+	}
+
+	panic("_futex_wait_with_timeout failure")
+}
+
+_futex_signal :: proc(f: ^Futex) {
+	res := _umtx_op(f, UMTX_OP_WAKE, 1, nil, nil)
+
+	if res == -1 {
+		panic("_futex_signal failure")
+	}
+}
+
+_futex_broadcast :: proc(f: ^Futex)  {
+	res := _umtx_op(f, UMTX_OP_WAKE, c.ulong(max(i32)), nil, nil)
+
+	if res == -1 {
+		panic("_futex_broadcast failure")
+	}
+}