Expose control of the number of open files in libvips' cache.

Breaks API of existing cache method.
Disable libvips cache for I/O tests.

.jshintrc

@@ -5,6 +5,7 @@
   "maxcomplexity": 13,
   "globals": {
     "before": true,
+    "after": true,
     "describe": true,
     "it": true
   }

CONTRIBUTING.md

@@ -41,8 +41,8 @@ Any change that modifies the existing public API should be added to the relevant
 
 | Release | WIP branch |
 | ------: | :--------- |
-| v0.12.0 | look       |
 | v0.13.0 | mind       |
+| v0.14.0 | needle     |
 
 Please squash your changes into a single commit using a command like `git rebase -i upstream/<wip-branch>`.
 

docs/api.md

@@ -590,19 +590,26 @@ An Object containing the version numbers of libvips and, on Linux, its dependenc
 
 ### Utilities
 
-#### sharp.cache([memory], [items])
+#### sharp.cache([options])
 
-If `memory` or `items` are provided, set the limits of _libvips'_ operation cache.
+If `options` is provided, sets the limits of _libvips'_ operation cache.
 
-* `memory` is the maximum memory in MB to use for this cache, with a default value of 100
-* `items` is the maximum number of operations to cache, with a default value of 500
+* `options.memory` is the maximum memory in MB to use for this cache, with a default value of 50
+* `options.files` is the maximum number of files to hold open, with a default value of 20
+* `options.items` is the maximum number of operations to cache, with a default value of 100
+
+`options` can also be a boolean, where `true` enables the default cache settings and `false` disables all caching.
 
 This method always returns cache statistics, useful for determining how much working memory is required for a particular task.
 
 ```javascript
-var stats = sharp.cache(); // { current: 75, high: 99, memory: 100, items: 500 }
-sharp.cache(200); // { current: 75, high: 99, memory: 200, items: 500 }
-sharp.cache(50, 200); // { current: 49, high: 99, memory: 50, items: 200}
+var stats = sharp.cache();
+```
+
+```javascript
+sharp.cache( { items: 200 } );
+sharp.cache( { files: 0 } );
+sharp.cache(false);
 ```
 
 #### sharp.concurrency([threads])

docs/changelog.md

@@ -1,5 +1,10 @@
 # Changelog
 
+### v0.13 - "*mind*"
+
+* Control number of open files in libvips' cache; breaks existing `cache` behaviour.
+  [#315](https://github.com/lovell/sharp/issues/315)
+
 ### v0.12 - "*look*"
 
 #### v0.12.2 - 16<sup>th</sup> January 2016

index.js

@@ -834,18 +834,25 @@ Sharp.prototype.clone = function() {
   return clone;
 };
 
-/*
-  Get and set cache memory and item limits
+/**
+  Get and set cache memory, file and item limits
 */
-module.exports.cache = function(memory, items) {
-  if (typeof memory !== 'number' || Number.isNaN(memory)) {
-    memory = null;
+module.exports.cache = function(options) {
+  if (typeof options === 'boolean') {
+    if (options) {
+      // Default cache settings of 50MB, 20 files, 100 items
+      return sharp.cache(50, 20, 100);
+    } else {
+      return sharp.cache(0, 0, 0);
+    }
+  } else if (typeof options === 'object') {
+    return sharp.cache(options.memory, options.files, options.items);
+  } else {
+    return sharp.cache();
   }
-  if (typeof items !== 'number' || Number.isNaN(items)) {
-    items = null;
-  }
-  return sharp.cache(memory, items);
 };
+// Ensure default cache settings are set
+module.exports.cache(true);
 
 /*
   Get and set size of thread pool

package.json

@@ -1,6 +1,6 @@
 {
   "name": "sharp",
-  "version": "0.12.2",
+  "version": "0.13.0",
   "author": "Lovell Fuller <npm@lovell.info>",
   "contributors": [
     "Pierre Inglebert <pierre.inglebert@gmail.com>",

src/sharp.cc

@@ -11,10 +11,6 @@
 NAN_MODULE_INIT(init) {
   vips_init("sharp");
 
-  // Set libvips operation cache limits
-  vips_cache_set_max_mem(100 * 1024 * 1024); // 100 MB
-  vips_cache_set_max(500); // 500 operations
-
   // Methods available to JavaScript
   Nan::Set(target, Nan::New("metadata").ToLocalChecked(),
     Nan::GetFunction(Nan::New<v8::FunctionTemplate>(metadata)).ToLocalChecked());

src/utilities.cc

@@ -24,33 +24,49 @@ using Nan::To;
 using Nan::Utf8String;
 
 /*
-  Get and set cache memory and item limits
+  Get and set cache limits
 */
 NAN_METHOD(cache) {
   HandleScope();
 
-  // Set cache memory limit
+  // Set memory limit
   if (info[0]->IsInt32()) {
     vips_cache_set_max_mem(To<int32_t>(info[0]).FromJust() * 1048576);
   }
-
-  // Set cache items limit
+  // Set file limit
   if (info[1]->IsInt32()) {
-    vips_cache_set_max(To<int32_t>(info[1]).FromJust());
+    vips_cache_set_max_files(To<int32_t>(info[1]).FromJust());
+  }
+  // Set items limit
+  if (info[2]->IsInt32()) {
+    vips_cache_set_max(To<int32_t>(info[2]).FromJust());
   }
 
-  // Get cache statistics
-  Local<Object> cache = New<Object>();
-  Set(cache, New("current").ToLocalChecked(),
+  // Get memory stats
+  Local<Object> memory = New<Object>();
+  Set(memory, New("current").ToLocalChecked(),
     New<Integer>(static_cast<int>(round(vips_tracked_get_mem() / 1048576)))
   );
-  Set(cache, New("high").ToLocalChecked(),
+  Set(memory, New("high").ToLocalChecked(),
     New<Integer>(static_cast<int>(round(vips_tracked_get_mem_highwater() / 1048576)))
   );
-  Set(cache, New("memory").ToLocalChecked(),
+  Set(memory, New("max").ToLocalChecked(),
     New<Integer>(static_cast<int>(round(vips_cache_get_max_mem() / 1048576)))
   );
-  Set(cache, New("items").ToLocalChecked(), New<Integer>(vips_cache_get_max()));
+  // Get file stats
+  Local<Object> files = New<Object>();
+  Set(files, New("current").ToLocalChecked(), New<Integer>(vips_tracked_get_files()));
+  Set(files, New("max").ToLocalChecked(), New<Integer>(vips_cache_get_max_files()));
+
+  // Get item stats
+  Local<Object> items = New<Object>();
+  Set(items, New("current").ToLocalChecked(), New<Integer>(vips_cache_get_size()));
+  Set(items, New("max").ToLocalChecked(), New<Integer>(vips_cache_get_max()));
+
+  Local<Object> cache = New<Object>();
+  Set(cache, New("memory").ToLocalChecked(), memory);
+  Set(cache, New("files").ToLocalChecked(), files);
+  Set(cache, New("items").ToLocalChecked(), items);
   info.GetReturnValue().Set(cache);
 }
 
@@ -262,6 +278,7 @@ NAN_METHOD(_maxColourDistance) {
     vips_object_local(hook, imagePremultipliedNoAlpha2);
     image2 = imagePremultipliedNoAlpha2;
   }
+
   // Calculate colour distance
   VipsImage *difference;
   if (vips_dE00(image1, image2, &difference, nullptr)) {
@@ -276,5 +293,10 @@ NAN_METHOD(_maxColourDistance) {
     return ThrowError(vips_error_buffer());
   }
   g_object_unref(hook);
+
+  // Clean up libvips' per-request data and threads
+  vips_error_clear();
+  vips_thread_shutdown();
+
   info.GetReturnValue().Set(New<Number>(maxColourDistance));
 }

test/bench/perf.js

@@ -34,7 +34,7 @@ var magickFilterBilinear = 'Triangle';
 var magickFilterBicubic = 'Lanczos';
 
 // Disable libvips cache to ensure tests are as fair as they can be
-sharp.cache(0);
+sharp.cache(false);
 // Enable use of SIMD
 sharp.simd(true);
 

test/unit/alpha.js

@@ -4,8 +4,6 @@ var assert = require('assert');
 var fixtures = require('../fixtures');
 var sharp = require('../../index');
 
-sharp.cache(0);
-
 describe('Alpha transparency', function() {
 
   it('Flatten to black', function(done) {

test/unit/blur.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Blur', function() {
 
   it('specific radius 1', function(done) {

test/unit/clone.js

@@ -6,9 +6,15 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Clone', function() {
+
+  before(function() {
+    sharp.cache(false);
+  });
+  after(function() {
+    sharp.cache(true);
+  });
+
   it('Read from Stream and write to multiple Streams', function(done) {
     var finishEventsExpected = 2;
     // Output stream 1
@@ -55,4 +61,5 @@ describe('Clone', function() {
     // Go
     fs.createReadStream(fixtures.inputJpg).pipe(rotator);
   });
+
 });

test/unit/colourspace.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Colour space conversion', function() {
 
   it('To greyscale', function(done) {

test/unit/crop.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Crop gravities', function() {
 
   var testSettings = [

test/unit/embed.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Embed', function() {
 
   it('JPEG within PNG, no alpha channel', function(done) {

test/unit/extract.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Partial image extraction', function() {
   describe('using the legacy extract(top,left,width,height) syntax', function () {
     it('JPEG', function(done) {

test/unit/gamma.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Gamma correction', function() {
 
   it('value of 0.0 (disabled)', function(done) {

test/unit/interpolation.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Interpolation', function() {
 
   it('nearest neighbour', function(done) {

test/unit/io.js

@@ -6,10 +6,15 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Input/output', function() {
 
+  before(function() {
+    sharp.cache(false);
+  });
+  after(function() {
+    sharp.cache(true);
+  });
+
   it('Read from File and write to Stream', function(done) {
     var writable = fs.createWriteStream(fixtures.outputJpg);
     writable.on('finish', function() {

test/unit/metadata.js

@@ -8,8 +8,6 @@ var icc = require('icc');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Image metadata', function() {
 
   it('JPEG', function(done) {

test/unit/negate.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Negate', function() {
     it('negate (jpeg)', function(done) {
         sharp(fixtures.inputJpg)

test/unit/normalize.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Normalization', function () {
 
   it('uses the same prototype for both spellings', function () {

test/unit/overlay.js

@@ -4,8 +4,6 @@ var assert = require('assert');
 var fixtures = require('../fixtures');
 var sharp = require('../../index');
 
-sharp.cache(0);
-
 // Helpers
 var getPaths = function(baseName, extension) {
   if (typeof extension === 'undefined') {

test/unit/resize.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Resize dimensions', function() {
 
   it('Exact crop', function(done) {

test/unit/rotate.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Rotation', function() {
 
   ['Landscape', 'Portrait'].forEach(function(orientation) {

test/unit/sharpen.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Sharpen', function() {
 
   it('specific radius 10', function(done) {

test/unit/threshold.js

@@ -5,8 +5,6 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 describe('Threshold', function() {
   it('threshold 1 jpeg', function(done) {
     sharp(fixtures.inputJpg)

test/unit/tile.js

@@ -10,8 +10,6 @@ var rimraf = require('rimraf');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
-sharp.cache(0);
-
 // Verifies all tiles in a given dz output directory are <= size
 var assertDeepZoomTiles = function(directory, expectedSize, expectedLevels, done) {
   // Get levels

test/unit/util.js

@@ -10,20 +10,48 @@ describe('Utilities', function() {
 
   describe('Cache', function() {
     it('Can be disabled', function() {
-      var cache = sharp.cache(0, 0);
-      assert.strictEqual(0, cache.memory);
-      assert.strictEqual(0, cache.items);
+      sharp.cache(false);
+      var cache = sharp.cache(false);
+      assert.strictEqual(cache.memory.current, 0);
+      assert.strictEqual(cache.memory.max, 0);
+      assert.strictEqual(typeof cache.memory.high, 'number');
+      assert.strictEqual(cache.files.current, 0);
+      assert.strictEqual(cache.files.max, 0);
+      assert.strictEqual(cache.items.current, 0);
+      assert.strictEqual(cache.items.max, 0);
     });
-    it('Can be set to a maximum of 50MB and 500 items', function() {
-      var cache = sharp.cache(50, 500);
-      assert.strictEqual(50, cache.memory);
-      assert.strictEqual(500, cache.items);
+    it('Can be enabled with defaults', function() {
+      var cache = sharp.cache(true);
+      assert.strictEqual(cache.memory.max, 50);
+      assert.strictEqual(cache.files.max, 20);
+      assert.strictEqual(cache.items.max, 100);
+    });
+    it('Can be set to zero', function() {
+      var cache = sharp.cache({
+        memory: 0,
+        files: 0,
+        items: 0
+      });
+      assert.strictEqual(cache.memory.max, 0);
+      assert.strictEqual(cache.files.max, 0);
+      assert.strictEqual(cache.items.max, 0);
+    });
+    it('Can be set to a maximum of 10MB, 100 files and 1000 items', function() {
+      var cache = sharp.cache({
+         memory: 10,
+         files: 100,
+         items: 1000
+      });
+      assert.strictEqual(cache.memory.max, 10);
+      assert.strictEqual(cache.files.max, 100);
+      assert.strictEqual(cache.items.max, 1000);
     });
     it('Ignores invalid values', function() {
-      sharp.cache(50, 500);
+      sharp.cache(true);
       var cache = sharp.cache('spoons');
-      assert.strictEqual(50, cache.memory);
-      assert.strictEqual(500, cache.items);
+      assert.strictEqual(cache.memory.max, 50);
+      assert.strictEqual(cache.files.max, 20);
+      assert.strictEqual(cache.items.max, 100);
     });
   });