react-native/React/Executors/RCTJSCWrapper.mm

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/**
* Copyright (c) 2016-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTJSCWrapper.h"
#import <UIKit/UIKit.h>
#import <JavaScriptCore/JavaScriptCore.h>
#import "RCTLog.h"
#include <dlfcn.h>
static void *RCTCustomLibraryHandler(void)
{
static dispatch_once_t token;
static void *handler;
dispatch_once(&token, ^{
const char *path = [[[NSBundle mainBundle] pathForResource:@"JavaScriptCore"
ofType:nil
inDirectory:@"Frameworks/JavaScriptCore.framework"] UTF8String];
if (path) {
handler = dlopen(path, RTLD_LAZY);
if (!handler) {
RCTLogWarn(@"Can't load custom JSC library: %s", dlerror());
}
}
});
return handler;
}
static void RCTSetUpSystemLibraryPointers(RCTJSCWrapper *wrapper)
{
wrapper->JSValueToStringCopy = JSValueToStringCopy;
wrapper->JSStringCreateWithCFString = JSStringCreateWithCFString;
wrapper->JSStringCopyCFString = JSStringCopyCFString;
wrapper->JSStringCreateWithUTF8CString = JSStringCreateWithUTF8CString;
wrapper->JSStringRelease = JSStringRelease;
wrapper->JSGlobalContextSetName = JSGlobalContextSetName;
wrapper->JSContextGetGlobalContext = JSContextGetGlobalContext;
wrapper->JSObjectSetProperty = JSObjectSetProperty;
wrapper->JSContextGetGlobalObject = JSContextGetGlobalObject;
wrapper->JSObjectGetProperty = JSObjectGetProperty;
wrapper->JSValueMakeFromJSONString = JSValueMakeFromJSONString;
wrapper->JSObjectCallAsFunction = JSObjectCallAsFunction;
wrapper->JSValueMakeNull = JSValueMakeNull;
wrapper->JSValueCreateJSONString = JSValueCreateJSONString;
wrapper->JSValueIsUndefined = JSValueIsUndefined;
wrapper->JSValueIsNull = JSValueIsNull;
wrapper->JSEvaluateScript = JSEvaluateScript;
wrapper->JSContext = [JSContext class];
wrapper->JSValue = [JSValue class];
wrapper->configureJSContextForIOS = NULL;
}
static void RCTSetUpCustomLibraryPointers(RCTJSCWrapper *wrapper)
{
void *libraryHandle = RCTCustomLibraryHandler();
if (!libraryHandle) {
RCTSetUpSystemLibraryPointers(wrapper);
return;
}
wrapper->JSValueToStringCopy = (JSValueToStringCopyFuncType)dlsym(libraryHandle, "JSValueToStringCopy");
wrapper->JSStringCreateWithCFString = (JSStringCreateWithCFStringFuncType)dlsym(libraryHandle, "JSStringCreateWithCFString");
wrapper->JSStringCopyCFString = (JSStringCopyCFStringFuncType)dlsym(libraryHandle, "JSStringCopyCFString");
wrapper->JSStringCreateWithUTF8CString = (JSStringCreateWithUTF8CStringFuncType)dlsym(libraryHandle, "JSStringCreateWithUTF8CString");
wrapper->JSStringRelease = (JSStringReleaseFuncType)dlsym(libraryHandle, "JSStringRelease");
wrapper->JSGlobalContextSetName = (JSGlobalContextSetNameFuncType)dlsym(libraryHandle, "JSGlobalContextSetName");
wrapper->JSContextGetGlobalContext = (JSContextGetGlobalContextFuncType)dlsym(libraryHandle, "JSContextGetGlobalContext");
wrapper->JSObjectSetProperty = (JSObjectSetPropertyFuncType)dlsym(libraryHandle, "JSObjectSetProperty");
wrapper->JSContextGetGlobalObject = (JSContextGetGlobalObjectFuncType)dlsym(libraryHandle, "JSContextGetGlobalObject");
wrapper->JSObjectGetProperty = (JSObjectGetPropertyFuncType)dlsym(libraryHandle, "JSObjectGetProperty");
wrapper->JSValueMakeFromJSONString = (JSValueMakeFromJSONStringFuncType)dlsym(libraryHandle, "JSValueMakeFromJSONString");
wrapper->JSObjectCallAsFunction = (JSObjectCallAsFunctionFuncType)dlsym(libraryHandle, "JSObjectCallAsFunction");
wrapper->JSValueMakeNull = (JSValueMakeNullFuncType)dlsym(libraryHandle, "JSValueMakeNull");
wrapper->JSValueCreateJSONString = (JSValueCreateJSONStringFuncType)dlsym(libraryHandle, "JSValueCreateJSONString");
wrapper->JSValueIsUndefined = (JSValueIsUndefinedFuncType)dlsym(libraryHandle, "JSValueIsUndefined");
wrapper->JSValueIsNull = (JSValueIsNullFuncType)dlsym(libraryHandle, "JSValueIsNull");
wrapper->JSEvaluateScript = (JSEvaluateScriptFuncType)dlsym(libraryHandle, "JSEvaluateScript");
wrapper->JSContext = (__bridge Class)dlsym(libraryHandle, "OBJC_CLASS_$_JSContext");
wrapper->JSValue = (__bridge Class)dlsym(libraryHandle, "OBJC_CLASS_$_JSValue");
wrapper->configureJSContextForIOS = (configureJSContextForIOSFuncType)dlsym(libraryHandle, "configureJSContextForIOS");
}
RCTJSCWrapper *RCTJSCWrapperCreate(BOOL useCustomJSC)
{
RCTJSCWrapper *wrapper = (RCTJSCWrapper *)malloc(sizeof(RCTJSCWrapper));
if (useCustomJSC && [UIDevice currentDevice].systemVersion.floatValue >= 8) {
RCTSetUpCustomLibraryPointers(wrapper);
} else {
RCTSetUpSystemLibraryPointers(wrapper);
}
return wrapper;
}
void RCTJSCWrapperRelease(RCTJSCWrapper *wrapper)
{
if (wrapper) {
free(wrapper);
}
}