From 65a7ec447309b361326c8a996a7660cdb69bf353 Mon Sep 17 00:00:00 2001
From: Kevin Gozali <fkg@fb.com>
Date: Mon, 9 Dec 2019 10:56:57 -0800
Subject: [PATCH] iOS: added helper functions to gate image instrumentations

Summary:
Introduced 2 helper functions to toggle image instrumentation/logging (not in this diff) so that gating check is more efficient and easy to access across RN iOS core.

Changelog: [Internal]

Reviewed By: sammy-SC

Differential Revision: D18597208

fbshipit-source-id: 0b22031802ab020b16d6fb63e52461cf80a37ab5
---
 Libraries/Image/RCTImageLoader.h  |  6 ++++++
 Libraries/Image/RCTImageLoader.mm | 23 +++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/Libraries/Image/RCTImageLoader.h b/Libraries/Image/RCTImageLoader.h
index 78cf41e467f..f82cdeccc2b 100644
--- a/Libraries/Image/RCTImageLoader.h
+++ b/Libraries/Image/RCTImageLoader.h
@@ -8,6 +8,7 @@
 #import <UIKit/UIKit.h>
 
 #import <React/RCTBridge.h>
+#import <React/RCTDefines.h>
 #import <React/RCTResizeMode.h>
 #import <React/RCTURLRequestHandler.h>
 #import <React/RCTImageDataDecoder.h>
@@ -15,6 +16,11 @@
 #import <React/RCTImageCache.h>
 #import <React/RCTImageLoaderProtocol.h>
 
+RCT_EXTERN BOOL RCTImageLoadingInstrumentationEnabled(void);
+RCT_EXTERN BOOL RCTImageLoadingPerfInstrumentationEnabled(void);
+RCT_EXTERN void RCTEnableImageLoadingInstrumentation(BOOL enabled);
+RCT_EXTERN void RCTEnableImageLoadingPerfInstrumentation(BOOL enabled);
+
 @interface RCTImageLoader : NSObject <RCTBridgeModule, RCTImageLoaderProtocol>
 - (instancetype)init;
 - (instancetype)initWithRedirectDelegate:(id<RCTImageRedirectProtocol>)redirectDelegate NS_DESIGNATED_INITIALIZER;
diff --git a/Libraries/Image/RCTImageLoader.mm b/Libraries/Image/RCTImageLoader.mm
index 5bb3b124867..6b82d8283ca 100644
--- a/Libraries/Image/RCTImageLoader.mm
+++ b/Libraries/Image/RCTImageLoader.mm
@@ -25,6 +25,29 @@
 
 using namespace facebook::react;
 
+static BOOL imageInstrumentationEnabled = NO;
+static BOOL imagePerfInstrumentationEnabled = NO;
+
+BOOL RCTImageLoadingInstrumentationEnabled(void)
+{
+  return imageInstrumentationEnabled;
+}
+
+BOOL RCTImageLoadingPerfInstrumentationEnabled(void)
+{
+  return imagePerfInstrumentationEnabled;
+}
+
+void RCTEnableImageLoadingInstrumentation(BOOL enabled)
+{
+  imageInstrumentationEnabled = enabled;
+}
+
+void RCTEnableImageLoadingPerfInstrumentation(BOOL enabled)
+{
+  imagePerfInstrumentationEnabled = enabled;
+}
+
 static NSInteger RCTImageBytesForImage(UIImage *image)
 {
   NSInteger singleImageBytes = image.size.width * image.size.height * image.scale * image.scale * 4;