[Concurrency] Fix calling convention mismatch in AsyncStream

Functions defined in AsyncStream.cpp are called from Swift with swiftcc
but are defined with the C calling convention.

Author: kateinoigakukun

stdlib/public/BackDeployConcurrency/AsyncStream.cpp

@@ -12,22 +12,27 @@
 
 #include <new>
 
+#include "swift/Runtime/Config.h"
 #include "swift/Threading/Mutex.h"
 
 namespace swift {
 // return the size in words for the given mutex primitive
+SWIFT_CC(swift)
 extern "C"
 size_t _swift_async_stream_lock_size() {
   size_t words = sizeof(Mutex) / sizeof(void *);
   if (words < 1) { return 1; }
   return words;
 }
 
+SWIFT_CC(swift)
 extern "C" void _swift_async_stream_lock_init(Mutex &lock) {
   new (&lock) Mutex();
 }
 
+SWIFT_CC(swift)
 extern "C" void _swift_async_stream_lock_lock(Mutex &lock) { lock.lock(); }
 
+SWIFT_CC(swift)
 extern "C" void _swift_async_stream_lock_unlock(Mutex &lock) { lock.unlock(); }
 }

stdlib/public/Concurrency/AsyncStream.cpp

@@ -12,22 +12,27 @@
 
 #include <new>
 
+#include "swift/Runtime/Config.h"
 #include "swift/Threading/Mutex.h"
 
 namespace swift {
 // return the size in words for the given mutex primitive
+SWIFT_CC(swift)
 extern "C"
 size_t _swift_async_stream_lock_size() {
   size_t words = sizeof(Mutex) / sizeof(void *);
   if (words < 1) { return 1; }
   return words;
 }
 
+SWIFT_CC(swift)
 extern "C" void _swift_async_stream_lock_init(Mutex &lock) {
   new (&lock) Mutex();
 }
 
+SWIFT_CC(swift)
 extern "C" void _swift_async_stream_lock_lock(Mutex &lock) { lock.lock(); }
 
+SWIFT_CC(swift)
 extern "C" void _swift_async_stream_lock_unlock(Mutex &lock) { lock.unlock(); }
 }