pkgs/swiftgen/example/avf_audio_wrapper.m

#include <stdint.h>
#import <Foundation/Foundation.h>
#import <objc/message.h>
#import "temp/AVFAudioWrapper.h"

#if !__has_feature(objc_arc)
#error "This file must be compiled with ARC enabled"
#endif

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundeclared-selector"

typedef struct {
  int64_t version;
  void* (*newWaiter)(void);
  void (*awaitWaiter)(void*);
  void* (*currentIsolate)(void);
  void (*enterIsolate)(void*);
  void (*exitIsolate)(void);
  int64_t (*getMainPortId)(void);
  bool (*getCurrentThreadOwnsIsolate)(int64_t);
} DOBJC_Context;

id objc_retainBlock(id);

#define BLOCKING_BLOCK_IMPL(ctx, BLOCK_SIG, INVOKE_DIRECT, INVOKE_LISTENER)    \
  assert(ctx->version >= 1);                                                   \
  void* targetIsolate = ctx->currentIsolate();                                 \
  int64_t targetPort = ctx->getMainPortId == NULL ? 0 : ctx->getMainPortId();  \
  return BLOCK_SIG {                                                           \
    void* currentIsolate = ctx->currentIsolate();                              \
    bool mayEnterIsolate =                                                     \
        currentIsolate == NULL &&                                              \
        ctx->getCurrentThreadOwnsIsolate != NULL &&                            \
        ctx->getCurrentThreadOwnsIsolate(targetPort);                          \
    if (currentIsolate == targetIsolate || mayEnterIsolate) {                  \
      if (mayEnterIsolate) {                                                   \
        ctx->enterIsolate(targetIsolate);                                      \
      }                                                                        \
      INVOKE_DIRECT;                                                           \
      if (mayEnterIsolate) {                                                   \
        ctx->exitIsolate();                                                    \
      }                                                                        \
    } else {                                                                   \
      void* waiter = ctx->newWaiter();                                         \
      INVOKE_LISTENER;                                                         \
      ctx->awaitWaiter(waiter);                                                \
    }                                                                          \
  };


typedef id  (^ProtocolTrampoline)(void * sel);
__attribute__((visibility("default"))) __attribute__((used))
id  _AVFAudioWrapper_protocolTrampoline_1mbt9g9(id target, void * sel) {
  return ((ProtocolTrampoline)((id (*)(id, SEL, SEL))objc_msgSend)(target, @selector(getDOBJCDartProtocolMethodForSelector:), sel))(sel);
}
#undef BLOCKING_BLOCK_IMPL

#pragma clang diagnostic pop