Cleanup test/core/pthread/create. NFC. (#12756)

Mostly convert to C to match the other tests here.

See #3494

Author: sbc100

test/core/pthread/create.cpp renamed to test/core/pthread/create.c

@@ -3,37 +3,36 @@
 // University of Illinois/NCSA Open Source License.  Both these licenses can be
 // found in the LICENSE file.
 
+#include <stdatomic.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <pthread.h>
 #include <assert.h>
 #include <emscripten.h>
 
-#include <atomic>
 
 #define NUM_THREADS 2
 #define TOTAL 100
 
-static std::atomic<int> sum;
+static _Atomic int sum;
 
 void *ThreadMain(void *arg) {
   for (int i = 0; i < TOTAL; i++) {
     // wait for a change, so we see interleaved processing.
     int last = ++sum;
-    while (sum.load() == last) {}
+    while (sum == last) {}
   }
   pthread_exit((void*)TOTAL);
 }
 
 pthread_t thread[NUM_THREADS];
 
-void CreateThread(long i)
-{
-  int rc = pthread_create(&thread[i], nullptr, ThreadMain, (void*)i);
+void CreateThread(long i) {
+  int rc = pthread_create(&thread[i], NULL, ThreadMain, (void*)i);
   assert(rc == 0);
 }
 
-void mainn() {
+void main_iter() {
   static int main_adds = 0;
   int worker_adds = sum++ - main_adds++;
   printf("main iter %d : %d\n", main_adds, worker_adds);
@@ -55,9 +54,11 @@ int main() {
   // if we don't allow sync pthread creation, the event loop must be reached for
   // the worker to start up.
 #ifndef ALLOW_SYNC
-  emscripten_set_main_loop(mainn, 0, 0);
+  emscripten_set_main_loop(main_iter, 0, 0);
 #else
-  while (1) mainn();
+  while (1) {
+    main_iter();
+  }
 #endif
   return 0;
 }

test/test_core.py

@@ -9102,7 +9102,7 @@ def test_pthread_create(self):
     # works with pthreads (even though we did not specify 'node,worker')
     self.set_setting('ENVIRONMENT', 'node')
     self.set_setting('STRICT_JS')
-    self.do_run_in_out_file_test('core/pthread/create.cpp')
+    self.do_run_in_out_file_test('core/pthread/create.c')
 
   @node_pthreads
   @parameterized({
@@ -9149,23 +9149,23 @@ def test_pthread_create_pool(self):
     self.set_setting('PTHREAD_POOL_SIZE', 2)
     self.set_setting('EXIT_RUNTIME')
     self.emcc_args += ['-DALLOW_SYNC']
-    self.do_run_in_out_file_test('core/pthread/create.cpp')
+    self.do_run_in_out_file_test('core/pthread/create.c')
 
   @node_pthreads
   def test_pthread_create_proxy(self):
     # with PROXY_TO_PTHREAD, we can synchronously depend on workers being available
     self.set_setting('PROXY_TO_PTHREAD')
     self.set_setting('EXIT_RUNTIME')
     self.emcc_args += ['-DALLOW_SYNC']
-    self.do_run_in_out_file_test('core/pthread/create.cpp')
+    self.do_run_in_out_file_test('core/pthread/create.c')
 
   @node_pthreads
   def test_pthread_create_embind_stack_check(self):
     # embind should work with stack overflow checks (see #12356)
     self.set_setting('STACK_OVERFLOW_CHECK', 2)
     self.set_setting('EXIT_RUNTIME')
     self.emcc_args += ['-lembind']
-    self.do_run_in_out_file_test('core/pthread/create.cpp')
+    self.do_run_in_out_file_test('core/pthread/create.c', emcc_args=['-sDEFAULT_TO_CXX'])
 
   @node_pthreads
   def test_pthread_exceptions(self):