add Object::print_all

Author: jcupitt

example/example1.rb

@@ -11,12 +11,12 @@
 # disable the operation cache
 Vips::cache_set_max 0
 
-n = 100
+n = 1
 
 n.times do |i|
     puts ""
     puts "call #{i} ..."
-    out = Vips::call "black", 200, 300
+    out = Vips::Operation.call "black", [200, 300]
     if out.width != 200 or out.height != 300
         puts "bad image result from black"
     end

example/example2.rb

@@ -11,9 +11,16 @@
 # turn on debug logging
 # Vips.set_debug true
 
-10000.times do |i|
+1.times do |i|
     puts "loop #{i} ..."
     im = Vips::Image.new_from_file ARGV[0]
-    im = im.embed 100, 100, 3000, 3000, :extend => :mirror
+    # im = im.embed 100, 100, 3000, 3000, :extend => :mirror
     im.write_to_file "x.v"
 end
+
+im = nil
+GC.start
+GC.start
+GC.start
+GC.start
+GC.start

example/example3.rb

@@ -503,22 +503,12 @@ def to_s
     # don't use at_exit to call vips_shutdown, it causes problems with fork, and
     # in any case libvips does this for us
 
-    attach_function :vips_object_print_all, [], :void
     attach_function :vips_leak_set, [:int], :void
 
-    def self.showall
-        GC.start
-        vips_object_print_all
-    end
-
     # Turn libvips leak testing on and off. Handy for debugging ruby-vips, not
     # very useful for user code. 
     def self.leak_set leak
-        if leak
-            vips_leak_set 1
-        else
-            vips_leak_set 0
-        end
+        vips_leak_set (leak ? 1 : 0)
     end
 
     attach_function :vips_cache_set_max, [:int], :void

lib/vips.rb

@@ -9,6 +9,9 @@
 module Vips
     private
 
+    # debugging support
+    attach_function :vips_object_print_all, [], :void
+
     # we must init these by hand, since they are usually made on first image
     # create
     attach_function :vips_band_format_get_type, [], :GType
@@ -69,6 +72,13 @@ class IntStruct < FFI::Struct
 
     class Object < GObject::GObject
 
+        # print all active VipsObjects, with their reference counts. Handy for
+        # debugging ruby-vips. 
+        def self.print_all
+            GC.start
+            vips_object_print_all
+        end
+
         # the layout of the VipsObject struct
         module ObjectLayout
             def self.included base