react-native/React/CxxModule/RCTCxxUtils.mm

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/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#import "RCTCxxUtils.h"
#import <React/RCTFollyConvert.h>
#import <React/RCTModuleData.h>
#import <React/RCTUtils.h>
#import <cxxreact/CxxNativeModule.h>
#import <jschelpers/Value.h>
#import "DispatchMessageQueueThread.h"
#import "RCTCxxModule.h"
#import "RCTNativeModule.h"
namespace facebook {
namespace react {
std::vector<std::unique_ptr<NativeModule>> createNativeModules(NSArray<RCTModuleData *> *modules, RCTBridge *bridge, const std::shared_ptr<Instance> &instance)
{
std::vector<std::unique_ptr<NativeModule>> nativeModules;
for (RCTModuleData *moduleData in modules) {
if ([moduleData.moduleClass isSubclassOfClass:[RCTCxxModule class]]) {
nativeModules.emplace_back(std::make_unique<CxxNativeModule>(
instance,
[moduleData.name UTF8String],
[moduleData] { return [(RCTCxxModule *)(moduleData.instance) createModule]; },
std::make_shared<DispatchMessageQueueThread>(moduleData)));
} else {
nativeModules.emplace_back(std::make_unique<RCTNativeModule>(bridge, moduleData));
}
}
return nativeModules;
}
JSContext *contextForGlobalContextRef(JSGlobalContextRef contextRef)
{
static std::mutex s_mutex;
static NSMapTable *s_contextCache;
if (!contextRef) {
return nil;
}
// Adding our own lock here, since JSC internal ones are insufficient
std::lock_guard<std::mutex> lock(s_mutex);
if (!s_contextCache) {
NSPointerFunctionsOptions keyOptions = NSPointerFunctionsOpaqueMemory | NSPointerFunctionsOpaquePersonality;
NSPointerFunctionsOptions valueOptions = NSPointerFunctionsWeakMemory | NSPointerFunctionsObjectPersonality;
s_contextCache = [[NSMapTable alloc] initWithKeyOptions:keyOptions valueOptions:valueOptions capacity:0];
}
JSContext *ctx = [s_contextCache objectForKey:(__bridge id)contextRef];
if (!ctx) {
ctx = [JSC_JSContext(contextRef) contextWithJSGlobalContextRef:contextRef];
[s_contextCache setObject:ctx forKey:(__bridge id)contextRef];
}
return ctx;
}
static NSError *errorWithException(const std::exception &e)
{
NSString *msg = @(e.what());
NSMutableDictionary *errorInfo = [NSMutableDictionary dictionary];
const JSException *jsException = dynamic_cast<const JSException*>(&e);
if (jsException) {
errorInfo[RCTJSRawStackTraceKey] = @(jsException->getStack().c_str());
msg = [@"Unhandled JS Exception: " stringByAppendingString:msg];
}
NSError *nestedError;
try {
std::rethrow_if_nested(e);
} catch(const std::exception &e) {
nestedError = errorWithException(e);
} catch(...) {}
if (nestedError) {
msg = [NSString stringWithFormat:@"%@\n\n%@", msg, [nestedError localizedDescription]];
}
errorInfo[NSLocalizedDescriptionKey] = msg;
return [NSError errorWithDomain:RCTErrorDomain code:1 userInfo:errorInfo];
}
NSError *tryAndReturnError(const std::function<void()>& func)
{
try {
@try {
func();
return nil;
}
@catch (NSException *exception) {
NSString *message =
[NSString stringWithFormat:@"Exception '%@' was thrown from JS thread", exception];
return RCTErrorWithMessage(message);
}
@catch (id exception) {
// This will catch any other ObjC exception, but no C++ exceptions
return RCTErrorWithMessage(@"non-std ObjC Exception");
}
} catch (const std::exception &ex) {
return errorWithException(ex);
} catch (...) {
// On a 64-bit platform, this would catch ObjC exceptions, too, but not on
// 32-bit platforms, so we catch those with id exceptions above.
return RCTErrorWithMessage(@"non-std C++ exception");
}
}
NSString *deriveSourceURL(NSURL *url)
{
NSString *sourceUrl;
if (url.isFileURL) {
// Url will contain only path to resource (i.g. file:// will be removed)
sourceUrl = url.path;
} else {
// Url will include protocol (e.g. http://)
sourceUrl = url.absoluteString;
}
return sourceUrl ?: @"";
}
} }