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Telegram/ThirdParty/dispatch/tests/dispatch_overcommit.c

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+/*
+ * Copyright (c) 2008-2011 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@
+ */
+
+#ifdef __linux__
+// for asprintf
+#define _GNU_SOURCE 1
+#endif
+#include <dispatch/dispatch.h>
+#include <dispatch/private.h>
+#include <stdio.h>
+#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+#include <assert.h>
+#ifdef __APPLE__
+#include <libkern/OSAtomic.h>
+#endif
+
+#include <bsdtests.h>
+#include "dispatch_test.h"
+
+int32_t count = 0;
+const int32_t final = 32;
+
+int
+main(void)
+{
+	dispatch_test_start("Dispatch Overcommit");
+
+	int i;
+	for (i = 0; i < final; ++i) {
+		char* name;
+		(void)asprintf(&name, "test.overcommit.%d", i);
+
+		dispatch_queue_t queue = dispatch_queue_create(name, NULL);
+		test_ptr_notnull("dispatch_queue_create", queue);
+		free(name);
+		dispatch_set_target_queue(queue, dispatch_get_global_queue(0, DISPATCH_QUEUE_OVERCOMMIT));
+
+		dispatch_async(queue, ^{
+			OSAtomicIncrement32(&count);
+			if (count == final) {
+				test_long("count", count, final);
+				test_stop();
+			} else {
+				while (1); // spin
+			}
+		});
+	}
+
+	dispatch_main();
+
+	return 0;
+}