Initial checkin of gRPC to third_party/

third_party/grpc/test/core/support/thd_test.c

Index: third_party/grpc/test/core/support/thd_test.c
diff --git a/third_party/grpc/test/core/support/thd_test.c b/third_party/grpc/test/core/support/thd_test.c
new file mode 100644
index 0000000000000000000000000000000000000000..f7807d280a2113d5a47a590ec6632e186508413e
--- /dev/null
+++ b/third_party/grpc/test/core/support/thd_test.c
@@ -0,0 +1,115 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/* Test of gpr thread support. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
+#include "test/core/util/test_config.h"
+
+struct test {
+  gpr_mu mu;
+  int n;
+  int is_done;
+  gpr_cv done_cv;
+};
+
+/* A Thread body.   Decrement t->n, and if is becomes zero, set t->done. */
+static void thd_body(void *v) {
+  struct test *t = v;
+  gpr_mu_lock(&t->mu);
+  t->n--;
+  if (t->n == 0) {
+    t->is_done = 1;
+    gpr_cv_signal(&t->done_cv);
+  }
+  gpr_mu_unlock(&t->mu);
+}
+
+static void thd_body_joinable(void *v) {}
+
+/* Test thread options work as expected */
+static void test_options(void) {
+  gpr_thd_options options = gpr_thd_options_default();
+  GPR_ASSERT(!gpr_thd_options_is_joinable(&options));
+  GPR_ASSERT(gpr_thd_options_is_detached(&options));
+  gpr_thd_options_set_joinable(&options);
+  GPR_ASSERT(gpr_thd_options_is_joinable(&options));
+  GPR_ASSERT(!gpr_thd_options_is_detached(&options));
+  gpr_thd_options_set_detached(&options);
+  GPR_ASSERT(!gpr_thd_options_is_joinable(&options));
+  GPR_ASSERT(gpr_thd_options_is_detached(&options));
+}
+
+/* Test that we can create a number of threads and wait for them. */
+static void test(void) {
+  int i;
+  gpr_thd_id thd;
+  gpr_thd_id thds[1000];
+  struct test t;
+  int n = 1000;
+  gpr_thd_options options = gpr_thd_options_default();
+  gpr_mu_init(&t.mu);
+  gpr_cv_init(&t.done_cv);
+  t.n = n;
+  t.is_done = 0;
+  for (i = 0; i != n; i++) {
+    GPR_ASSERT(gpr_thd_new(&thd, &thd_body, &t, NULL));
+  }
+  gpr_mu_lock(&t.mu);
+  while (!t.is_done) {
+    gpr_cv_wait(&t.done_cv, &t.mu, gpr_inf_future(GPR_CLOCK_REALTIME));
+  }
+  gpr_mu_unlock(&t.mu);
+  GPR_ASSERT(t.n == 0);
+  gpr_thd_options_set_joinable(&options);
+  for (i = 0; i < n; i++) {
+    GPR_ASSERT(gpr_thd_new(&thds[i], &thd_body_joinable, NULL, &options));
+  }
+  for (i = 0; i < n; i++) {
+    gpr_thd_join(thds[i]);
+  }
+}
+
+/* ------------------------------------------------- */
+
+int main(int argc, char *argv[]) {
+  grpc_test_init(argc, argv);
+  test_options();
+  test();
+  return 0;
+}