Use FreeCallback to support mixed Windows runtime libs #152

binding.js

@@ -54,9 +54,9 @@ var error = function(msg) {
 module.exports.download_vips = function() {
   // Has vips been installed locally?
   if (!isFile(vipsHeaderPath)) {
-    // 32-bit
-    if (process.arch === 'ia32') {
-      error('32-bit systems require manual installation - please see http://sharp.dimens.io/en/stable/install/');
+    // Ensure 64-bit
+    if (process.arch !== 'x64') {
+      error('ARM and 32-bit systems require manual installation - please see http://sharp.dimens.io/en/stable/install/');
     }
     // Ensure libc >= 2.15
     var lddVersion = process.env.LDD_VERSION;

src/common.cc

@@ -177,4 +177,13 @@ namespace sharp {
     return window_size;
   }
 
+  /*
+    Called when a Buffer undergoes GC, required to support mixed runtime libraries in Windows
+  */
+  void FreeCallback(char* data, void* hint) {
+    if (data != NULL) {
+      g_free(data);
+    }
+  }
+
 } // namespace sharp

src/common.h

@@ -80,6 +80,11 @@ namespace sharp {
   */
   int InterpolatorWindowSize(char const *name);
 
+  /*
+    Called when a Buffer undergoes GC, required to support mixed runtime libraries in Windows
+  */
+  void FreeCallback(char* data, void* hint);
+
 }  // namespace sharp
 
 #endif  // SRC_COMMON_H_

src/metadata.cc

@@ -35,6 +35,7 @@ using sharp::InitImage;
 using sharp::HasProfile;
 using sharp::HasAlpha;
 using sharp::ExifOrientation;
+using sharp::FreeCallback;
 using sharp::counterQueue;
 
 struct MetadataBaton {
@@ -175,10 +176,16 @@ class MetadataWorker : public AsyncWorker {
         Set(info, New("orientation").ToLocalChecked(), New<Number>(baton->orientation));
       }
       if (baton->exifLength > 0) {
-        Set(info, New("exif").ToLocalChecked(), NewBuffer(baton->exif, baton->exifLength).ToLocalChecked());
+        Set(info,
+          New("exif").ToLocalChecked(),
+          NewBuffer(baton->exif, baton->exifLength, FreeCallback, nullptr).ToLocalChecked()
+        );
       }
       if (baton->iccLength > 0) {
-        Set(info, New("icc").ToLocalChecked(), NewBuffer(baton->icc, baton->iccLength).ToLocalChecked());
+        Set(info,
+          New("icc").ToLocalChecked(),
+          NewBuffer(baton->icc, baton->iccLength, FreeCallback, nullptr).ToLocalChecked()
+        );
       }
       argv[1] = info;
     }

src/pipeline.cc

@@ -55,6 +55,7 @@ using sharp::IsPng;
 using sharp::IsWebp;
 using sharp::IsTiff;
 using sharp::IsDz;
+using sharp::FreeCallback;
 using sharp::counterProcess;
 using sharp::counterQueue;
 
@@ -959,7 +960,9 @@ class PipelineWorker : public AsyncWorker {
 
       if (baton->bufferOutLength > 0) {
         // Pass ownership of output data to Buffer instance
-        argv[1] = NewBuffer(static_cast<char*>(baton->bufferOut), baton->bufferOutLength).ToLocalChecked();
+        argv[1] = NewBuffer(
+          static_cast<char*>(baton->bufferOut), baton->bufferOutLength, FreeCallback, nullptr
+        ).ToLocalChecked();
         // Add buffer size to info
         Set(info, New("size").ToLocalChecked(), New<Uint32>(static_cast<uint32_t>(baton->bufferOutLength)));
         argv[2] = info;

test/leak/sharp.supp

@@ -285,6 +285,13 @@
   ...
   fun:get_bands
 }
+{
+  value_magick_is_palette_image
+  Memcheck:Value8
+  fun:IsPaletteImage
+  ...
+  fun:get_bands
+}
 
 # glib g_file_read_link
 # https://github.com/GNOME/glib/commit/49a5d0f6f2aed99cd78f25655f137f4448e47d92