Make Process::Status Windows-compatible.

Skip the bitmasks/signal handling.

Co-Authored-By: Stephanie Hobbs <steph@rx14.co.uk>

src/process/status.cr

@@ -1,38 +1,65 @@
-# The status of a terminated process.
+# The status of a terminated process. Returned by `Process#wait`.
 class Process::Status
   # Platform-specific exit status code, which usually contains either the exit code or a termination signal.
   # The other `Process::Status` methods extract the values from `exit_status`.
-  getter exit_status : Int32
-
-  def initialize(@exit_status : Int32)
+  def exit_status : Int32
+    @exit_status.to_i32
   end
 
+  {% if flag?(:win32) %}
+    # :nodoc:
+    def initialize(@exit_status : UInt32)
+    end
+  {% else %}
+    # :nodoc:
+    def initialize(@exit_status : Int32)
+    end
+  {% end %}
+
   # Returns `true` if the process was terminated by a signal.
-  def signal_exit?
-    # define __WIFSIGNALED(status) (((signed char) (((status) & 0x7f) + 1) >> 1) > 0)
-    ((LibC::SChar.new(@exit_status & 0x7f) + 1) >> 1) > 0
+  def signal_exit? : Bool
+    {% if flag?(:unix) %}
+      # define __WIFSIGNALED(status) (((signed char) (((status) & 0x7f) + 1) >> 1) > 0)
+      ((LibC::SChar.new(@exit_status & 0x7f) + 1) >> 1) > 0
+    {% else %}
+      false
+    {% end %}
   end
 
   # Returns `true` if the process terminated normally.
-  def normal_exit?
-    # define __WIFEXITED(status) (__WTERMSIG(status) == 0)
-    signal_code == 0
+  def normal_exit? : Bool
+    {% if flag?(:unix) %}
+      # define __WIFEXITED(status) (__WTERMSIG(status) == 0)
+      signal_code == 0
+    {% else %}
+      true
+    {% end %}
   end
 
   # If `signal_exit?` is `true`, returns the *Signal* the process
   # received and didn't handle. Will raise if `signal_exit?` is `false`.
-  def exit_signal
-    Signal.from_value(signal_code)
+  #
+  # Available only on Unix-like operating systems.
+  def exit_signal : Signal
+    {% if flag?(:unix) %}
+      Signal.from_value(signal_code)
+    {% else %}
+      raise NotImplementedError.new("Process::Status#exit_signal")
+    {% end %}
   end
 
   # If `normal_exit?` is `true`, returns the exit code of the process.
-  def exit_code
-    # define __WEXITSTATUS(status) (((status) & 0xff00) >> 8)
-    (@exit_status & 0xff00) >> 8
+  def exit_code : Int32
+    {% if flag?(:unix) %}
+      # define __WEXITSTATUS(status) (((status) & 0xff00) >> 8)
+      (@exit_status & 0xff00) >> 8
+    {% else %}
+      exit_status
+    {% end %}
   end
 
   # Returns `true` if the process exited normally with an exit code of `0`.
-  def success?
+  def success? : Bool
     normal_exit? && exit_code == 0
   end