1 files changed, 206 insertions, 0 deletions
diff --git a/test/core/support/mpscq_test.c b/test/core/support/mpscq_test.c
new file mode 100644
index 0000000000..491eb9148b
--- /dev/null
+++ b/test/core/support/mpscq_test.c
@@ -0,0 +1,206 @@
+/*
+ *
+ * Copyright 2016, 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.
+ *
+ */
+
+#include "src/core/lib/support/mpscq.h"
+
+#include <stdlib.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/sync.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/useful.h>
+#include "test/core/util/test_config.h"
+
+typedef struct test_node {
+  gpr_mpscq_node node;
+  size_t i;
+  size_t *ctr;
+} test_node;
+
+static test_node *new_node(size_t i, size_t *ctr) {
+  test_node *n = gpr_malloc(sizeof(test_node));
+  n->i = i;
+  n->ctr = ctr;
+  return n;
+}
+
+static void test_serial(void) {
+  gpr_log(GPR_DEBUG, "test_serial");
+  gpr_mpscq q;
+  gpr_mpscq_init(&q);
+  for (size_t i = 0; i < 10000000; i++) {
+    gpr_mpscq_push(&q, &new_node(i, NULL)->node);
+  }
+  for (size_t i = 0; i < 10000000; i++) {
+    test_node *n = (test_node *)gpr_mpscq_pop(&q);
+    GPR_ASSERT(n);
+    GPR_ASSERT(n->i == i);
+    gpr_free(n);
+  }
+}
+
+typedef struct {
+  size_t ctr;
+  gpr_mpscq *q;
+  gpr_event *start;
+} thd_args;
+
+#define THREAD_ITERATIONS 100000
+
+static void test_thread(void *args) {
+  thd_args *a = args;
+  gpr_event_wait(a->start, gpr_inf_future(GPR_CLOCK_REALTIME));
+  for (size_t i = 1; i <= THREAD_ITERATIONS; i++) {
+    gpr_mpscq_push(a->q, &new_node(i, &a->ctr)->node);
+  }
+}
+
+static void test_mt(void) {
+  gpr_log(GPR_DEBUG, "test_mt");
+  gpr_event start;
+  gpr_event_init(&start);
+  gpr_thd_id thds[100];
+  thd_args ta[GPR_ARRAY_SIZE(thds)];
+  gpr_mpscq q;
+  gpr_mpscq_init(&q);
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
+    gpr_thd_options options = gpr_thd_options_default();
+    gpr_thd_options_set_joinable(&options);
+    ta[i].ctr = 0;
+    ta[i].q = &q;
+    ta[i].start = &start;
+    GPR_ASSERT(gpr_thd_new(&thds[i], test_thread, &ta[i], &options));
+  }
+  size_t num_done = 0;
+  size_t spins = 0;
+  gpr_event_set(&start, (void *)1);
+  while (num_done != GPR_ARRAY_SIZE(thds)) {
+    gpr_mpscq_node *n;
+    while ((n = gpr_mpscq_pop(&q)) == NULL) {
+      spins++;
+    }
+    test_node *tn = (test_node *)n;
+    GPR_ASSERT(*tn->ctr == tn->i - 1);
+    *tn->ctr = tn->i;
+    if (tn->i == THREAD_ITERATIONS) num_done++;
+    gpr_free(tn);
+  }
+  gpr_log(GPR_DEBUG, "spins: %" PRIdPTR, spins);
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
+    gpr_thd_join(thds[i]);
+  }
+  gpr_mpscq_destroy(&q);
+}
+
+typedef struct {
+  thd_args *ta;
+  size_t num_thds;
+  gpr_mu mu;
+  size_t num_done;
+  size_t spins;
+  gpr_mpscq *q;
+  gpr_event *start;
+} pull_args;
+
+static void pull_thread(void *arg) {
+  pull_args *pa = arg;
+  gpr_event_wait(pa->start, gpr_inf_future(GPR_CLOCK_REALTIME));
+
+  for (;;) {
+    gpr_mu_lock(&pa->mu);
+    if (pa->num_done == pa->num_thds) {
+      gpr_mu_unlock(&pa->mu);
+      return;
+    }
+    gpr_mpscq_node *n;
+    while ((n = gpr_mpscq_pop(pa->q)) == NULL) {
+      pa->spins++;
+    }
+    test_node *tn = (test_node *)n;
+    GPR_ASSERT(*tn->ctr == tn->i - 1);
+    *tn->ctr = tn->i;
+    if (tn->i == THREAD_ITERATIONS) pa->num_done++;
+    gpr_free(tn);
+    gpr_mu_unlock(&pa->mu);
+  }
+}
+
+static void test_mt_multipop(void) {
+  gpr_log(GPR_DEBUG, "test_mt_multipop");
+  gpr_event start;
+  gpr_event_init(&start);
+  gpr_thd_id thds[100];
+  gpr_thd_id pull_thds[100];
+  thd_args ta[GPR_ARRAY_SIZE(thds)];
+  gpr_mpscq q;
+  gpr_mpscq_init(&q);
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
+    gpr_thd_options options = gpr_thd_options_default();
+    gpr_thd_options_set_joinable(&options);
+    ta[i].ctr = 0;
+    ta[i].q = &q;
+    ta[i].start = &start;
+    GPR_ASSERT(gpr_thd_new(&thds[i], test_thread, &ta[i], &options));
+  }
+  pull_args pa;
+  pa.ta = ta;
+  pa.num_thds = GPR_ARRAY_SIZE(thds);
+  pa.spins = 0;
+  pa.num_done = 0;
+  pa.q = &q;
+  pa.start = &start;
+  gpr_mu_init(&pa.mu);
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(pull_thds); i++) {
+    gpr_thd_options options = gpr_thd_options_default();
+    gpr_thd_options_set_joinable(&options);
+    GPR_ASSERT(gpr_thd_new(&pull_thds[i], pull_thread, &pa, &options));
+  }
+  gpr_event_set(&start, (void *)1);
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(pull_thds); i++) {
+    gpr_thd_join(pull_thds[i]);
+  }
+  gpr_log(GPR_DEBUG, "spins: %" PRIdPTR, pa.spins);
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(thds); i++) {
+    gpr_thd_join(thds[i]);
+  }
+  gpr_mpscq_destroy(&q);
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  test_serial();
+  test_mt();
+  test_mt_multipop();
+  return 0;
+}