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Telegram/ThirdParty/dispatch/tests/dispatch_sync_on_main.c

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+/*
+ * Copyright (c) 2009-2011 Apple Inc. All rights reserved.
+ *
+ * @APPLE_APACHE_LICENSE_HEADER_START@
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @APPLE_APACHE_LICENSE_HEADER_END@
+ */
+
+#include <dispatch/dispatch.h>
+#include <dispatch/private.h>
+#include <stdlib.h>
+#include <stdio.h>
+#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
+#include <unistd.h>
+#endif
+#include <CoreFoundation/CoreFoundation.h>
+
+#include <bsdtests.h>
+#include "dispatch_test.h"
+
+const int32_t final = 10;
+int global_count = 0;
+
+static void
+work(void* ctxt __attribute__((unused)))
+{
+	if (global_count == INT_MAX) {
+		test_stop();
+	}
+	printf("Firing timer on main %d\n", ++global_count);
+	dispatch_after_f(dispatch_time(0, 100000*NSEC_PER_USEC),
+			dispatch_get_main_queue(), NULL, work);
+}
+
+int
+main(void)
+{
+	dispatch_test_start("Dispatch Sync on main"); // <rdar://problem/7181849>
+
+	dispatch_queue_t dq = dispatch_queue_create("foo.bar", NULL);
+	dispatch_async(dq, ^{
+		dispatch_async_f(dispatch_get_main_queue(), NULL, work);
+		int i;
+		for (i=0; i<final; ++i) {
+			dispatch_sync(dispatch_get_main_queue(), ^{
+				printf("Calling sync %d\n", i);
+				test_long("sync on main", pthread_main_np(), 1);
+				if (i == final-1) {
+					global_count = INT_MAX;
+				}
+			});
+			const struct timespec t = {.tv_nsec = 50000*NSEC_PER_USEC};
+			nanosleep(&t, NULL);
+		}
+	});
+	dispatch_release(dq);
+
+	CFRunLoopRun();
+	return 0;
+}