Initial import.

4 files changed, 796 insertions, 0 deletions

diff --git a/test/core/surface/byte_buffer_reader_test.c b/test/core/surface/byte_buffer_reader_test.c
new file mode 100644
index 0000000000..bc5a512a0b
--- /dev/null
+++ b/test/core/surface/byte_buffer_reader_test.c
@@ -0,0 +1,111 @@
+/*
+ *
+ * Copyright 2014, 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 <grpc/byte_buffer_reader.h>
+#include <grpc/byte_buffer.h>
+#include <grpc/support/slice.h>
+#include <grpc/grpc.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
+#include "test/core/util/test_config.h"
+
+#include <string.h>
+
+#define LOG_TEST() gpr_log(GPR_INFO, "%s", __FUNCTION__)
+
+static void test_create() {
+  grpc_byte_buffer *buffer;
+  grpc_byte_buffer_reader *reader;
+  gpr_slice empty = gpr_empty_slice();
+  LOG_TEST();
+  buffer = grpc_byte_buffer_create(&empty, 1);
+  reader = grpc_byte_buffer_reader_create(buffer);
+  grpc_byte_buffer_reader_destroy(reader);
+  grpc_byte_buffer_destroy(buffer);
+}
+
+static void test_read_one_slice() {
+  gpr_slice slice;
+  grpc_byte_buffer *buffer;
+  grpc_byte_buffer_reader *reader;
+  gpr_slice first_slice, second_slice;
+  int first_code, second_code;
+
+  LOG_TEST();
+  slice = gpr_slice_from_copied_string("test");
+  buffer = grpc_byte_buffer_create(&slice, 1);
+  gpr_slice_unref(slice);
+  reader = grpc_byte_buffer_reader_create(buffer);
+  first_code = grpc_byte_buffer_reader_next(reader, &first_slice);
+  GPR_ASSERT(first_code != 0);
+  GPR_ASSERT(memcmp(GPR_SLICE_START_PTR(first_slice), "test", 4) == 0);
+  gpr_slice_unref(first_slice);
+  second_code = grpc_byte_buffer_reader_next(reader, &second_slice);
+  GPR_ASSERT(second_code == 0);
+  grpc_byte_buffer_reader_destroy(reader);
+  grpc_byte_buffer_destroy(buffer);
+}
+
+static void test_read_one_slice_malloc() {
+  gpr_slice slice;
+  grpc_byte_buffer *buffer;
+  grpc_byte_buffer_reader *reader;
+  gpr_slice first_slice, second_slice;
+  int first_code, second_code;
+
+  LOG_TEST();
+  slice = gpr_slice_malloc(4);
+  memcpy(GPR_SLICE_START_PTR(slice), "test", 4);
+  buffer = grpc_byte_buffer_create(&slice, 1);
+  gpr_slice_unref(slice);
+  reader = grpc_byte_buffer_reader_create(buffer);
+  first_code = grpc_byte_buffer_reader_next(reader, &first_slice);
+  GPR_ASSERT(first_code != 0);
+  GPR_ASSERT(memcmp(GPR_SLICE_START_PTR(first_slice), "test", 4) == 0);
+  gpr_slice_unref(first_slice);
+  second_code = grpc_byte_buffer_reader_next(reader, &second_slice);
+  GPR_ASSERT(second_code == 0);
+  grpc_byte_buffer_reader_destroy(reader);
+  grpc_byte_buffer_destroy(buffer);
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  test_create();
+  test_read_one_slice();
+  test_read_one_slice_malloc();
+  return 0;
+}
diff --git a/test/core/surface/completion_queue_benchmark.c b/test/core/surface/completion_queue_benchmark.c
new file mode 100644
index 0000000000..5360d7c6c3
--- /dev/null
+++ b/test/core/surface/completion_queue_benchmark.c
@@ -0,0 +1,168 @@
+/*
+ *
+ * Copyright 2014, 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/surface/completion_queue.h"
+
+#include <math.h>
+#include <stdio.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
+
+typedef struct test_thread_options {
+  gpr_event on_started;
+  gpr_event *start;
+  gpr_event on_finished;
+  grpc_completion_queue *cc;
+  int iterations;
+} test_thread_options;
+
+static void producer_thread(void *arg) {
+  test_thread_options *opt = arg;
+  int i;
+
+  gpr_event_set(&opt->on_started, (void *)(gpr_intptr) 1);
+  GPR_ASSERT(gpr_event_wait(opt->start, gpr_inf_future));
+
+  for (i = 0; i < opt->iterations; i++) {
+    grpc_cq_begin_op(opt->cc, NULL, GRPC_WRITE_ACCEPTED);
+    grpc_cq_end_write_accepted(opt->cc, (void *)(gpr_intptr) 1, NULL, NULL,
+                               NULL, GRPC_OP_OK);
+  }
+
+  gpr_event_set(&opt->on_finished, (void *)(gpr_intptr) 1);
+}
+
+static void consumer_thread(void *arg) {
+  test_thread_options *opt = arg;
+  grpc_event *ev;
+
+  gpr_event_set(&opt->on_started, (void *)(gpr_intptr) 1);
+  GPR_ASSERT(gpr_event_wait(opt->start, gpr_inf_future));
+
+  for (;;) {
+    ev = grpc_completion_queue_next(opt->cc, gpr_inf_future);
+    switch (ev->type) {
+      case GRPC_WRITE_ACCEPTED:
+        break;
+      case GRPC_QUEUE_SHUTDOWN:
+        gpr_event_set(&opt->on_finished, (void *)(gpr_intptr) 1);
+        return;
+      default:
+        gpr_log(GPR_ERROR, "Invalid event received: %d", ev->type);
+        abort();
+    }
+    grpc_event_finish(ev);
+  }
+}
+
+double ops_per_second(int consumers, int producers, int iterations) {
+  test_thread_options *options =
+      gpr_malloc((producers + consumers) * sizeof(test_thread_options));
+  gpr_event start = GPR_EVENT_INIT;
+  grpc_completion_queue *cc = grpc_completion_queue_create();
+  int i;
+  gpr_timespec t_start, t_end, t_delta;
+
+  /* start all threads: they will wait for phase1 */
+  for (i = 0; i < producers + consumers; i++) {
+    gpr_thd_id id;
+    gpr_event_init(&options[i].on_started);
+    gpr_event_init(&options[i].on_finished);
+    options[i].start = &start;
+    options[i].cc = cc;
+    options[i].iterations = iterations;
+    GPR_ASSERT(gpr_thd_new(&id,
+                           i < producers ? producer_thread : consumer_thread,
+                           options + i, NULL));
+    gpr_event_wait(&options[i].on_started, gpr_inf_future);
+  }
+
+  /* start the benchmark */
+  t_start = gpr_now();
+  gpr_event_set(&start, (void *)(gpr_intptr) 1);
+
+  /* wait for producers to finish */
+  for (i = 0; i < producers; i++) {
+    GPR_ASSERT(gpr_event_wait(&options[i].on_finished, gpr_inf_future));
+  }
+
+  /* in parallel, we shutdown the completion channel - all events should still
+     be consumed */
+  grpc_completion_queue_shutdown(cc);
+
+  /* join all threads */
+  for (i = producers; i < producers + consumers; i++) {
+    GPR_ASSERT(gpr_event_wait(&options[i].on_finished, gpr_inf_future));
+  }
+  t_end = gpr_now();
+
+  /* destroy the completion channel */
+  grpc_completion_queue_destroy(cc);
+
+  gpr_free(options);
+
+  t_delta = gpr_time_sub(t_end, t_start);
+  return (t_delta.tv_sec + 1e-9 * t_delta.tv_nsec) / (producers * iterations);
+}
+
+double ops_per_second_top(int consumers, int producers) {
+  return ops_per_second(consumers, producers, 1000000 / producers);
+}
+
+int main(void) {
+  const int counts[] = {1, 2, 3, 4, 5, 6, 7, 8, 12, 16, 20, 24, 32, 40, 64};
+  const int ncounts = sizeof(counts) / sizeof(*counts);
+  int i, j;
+
+  printf("\"\",");
+  for (i = 0; i < ncounts; i++) {
+    int producers = counts[i];
+    printf("%d%s", producers, i == ncounts - 1 ? "\n" : ",");
+  }
+
+  for (j = 0; j < ncounts; j++) {
+    int consumers = counts[j];
+    printf("%d,", consumers);
+    for (i = 0; i < ncounts; i++) {
+      int producers = counts[i];
+      printf("%f%s", ops_per_second_top(consumers, producers),
+             i == ncounts - 1 ? "\n" : ",");
+      fflush(stdout);
+    }
+  }
+
+  return 0;
+}
diff --git a/test/core/surface/completion_queue_test.c b/test/core/surface/completion_queue_test.c
new file mode 100644
index 0000000000..6df159f697
--- /dev/null
+++ b/test/core/surface/completion_queue_test.c
@@ -0,0 +1,435 @@
+/*
+ *
+ * Copyright 2014, 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/surface/completion_queue.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+#include "src/core/surface/surface_em.h"
+#include "test/core/util/test_config.h"
+
+#define LOG_TEST() gpr_log(GPR_INFO, "%s", __FUNCTION__)
+
+static void increment_int_on_finish(void *user_data, grpc_op_error error) {
+  ++*(int *)user_data;
+}
+
+static void *create_test_tag() {
+  static gpr_intptr i = 0;
+  return (void *)(++i);
+}
+
+/* helper for tests to shutdown correctly and tersely */
+static void shutdown_and_destroy(grpc_completion_queue *cc) {
+  grpc_event *ev;
+  grpc_completion_queue_shutdown(cc);
+  ev = grpc_completion_queue_next(cc, gpr_inf_past);
+  GPR_ASSERT(ev != NULL);
+  GPR_ASSERT(ev->type == GRPC_QUEUE_SHUTDOWN);
+  grpc_event_finish(ev);
+  grpc_completion_queue_destroy(cc);
+}
+
+/* ensure we can create and destroy a completion channel */
+static void test_no_op() {
+  LOG_TEST();
+  shutdown_and_destroy(grpc_completion_queue_create());
+}
+
+static void test_wait_empty() {
+  grpc_completion_queue *cc;
+
+  LOG_TEST();
+
+  cc = grpc_completion_queue_create();
+  GPR_ASSERT(grpc_completion_queue_next(cc, gpr_now()) == NULL);
+  shutdown_and_destroy(cc);
+}
+
+static void test_cq_end_read() {
+  grpc_event *ev;
+  grpc_completion_queue *cc;
+  int on_finish_called = 0;
+  void *tag = create_test_tag();
+
+  LOG_TEST();
+
+  cc = grpc_completion_queue_create();
+
+  grpc_cq_begin_op(cc, NULL, GRPC_READ);
+  grpc_cq_end_read(cc, tag, NULL, increment_int_on_finish, &on_finish_called,
+                   NULL);
+
+  ev = grpc_completion_queue_next(cc, gpr_inf_past);
+  GPR_ASSERT(ev != NULL);
+  GPR_ASSERT(ev->type == GRPC_READ);
+  GPR_ASSERT(ev->tag == tag);
+  GPR_ASSERT(ev->data.read == NULL);
+  GPR_ASSERT(on_finish_called == 0);
+  grpc_event_finish(ev);
+  GPR_ASSERT(on_finish_called == 1);
+
+  shutdown_and_destroy(cc);
+}
+
+static void test_cq_end_invoke_accepted() {
+  grpc_event *ev;
+  grpc_completion_queue *cc;
+  int on_finish_called = 0;
+  void *tag = create_test_tag();
+
+  LOG_TEST();
+
+  cc = grpc_completion_queue_create();
+
+  grpc_cq_begin_op(cc, NULL, GRPC_INVOKE_ACCEPTED);
+  grpc_cq_end_invoke_accepted(cc, tag, NULL, increment_int_on_finish,
+                              &on_finish_called, GRPC_OP_OK);
+
+  ev = grpc_completion_queue_next(cc, gpr_inf_past);
+  GPR_ASSERT(ev != NULL);
+  GPR_ASSERT(ev->type == GRPC_INVOKE_ACCEPTED);
+  GPR_ASSERT(ev->tag == tag);
+  GPR_ASSERT(ev->data.invoke_accepted == GRPC_OP_OK);
+  GPR_ASSERT(on_finish_called == 0);
+  grpc_event_finish(ev);
+  GPR_ASSERT(on_finish_called == 1);
+
+  shutdown_and_destroy(cc);
+}
+
+static void test_cq_end_write_accepted() {
+  grpc_event *ev;
+  grpc_completion_queue *cc;
+  int on_finish_called = 0;
+  void *tag = create_test_tag();
+
+  LOG_TEST();
+
+  cc = grpc_completion_queue_create();
+
+  grpc_cq_begin_op(cc, NULL, GRPC_WRITE_ACCEPTED);
+  grpc_cq_end_write_accepted(cc, tag, NULL, increment_int_on_finish,
+                             &on_finish_called, GRPC_OP_OK);
+
+  ev = grpc_completion_queue_next(cc, gpr_inf_past);
+  GPR_ASSERT(ev != NULL);
+  GPR_ASSERT(ev->type == GRPC_WRITE_ACCEPTED);
+  GPR_ASSERT(ev->tag == tag);
+  GPR_ASSERT(ev->data.write_accepted == GRPC_OP_OK);
+  GPR_ASSERT(on_finish_called == 0);
+  grpc_event_finish(ev);
+  GPR_ASSERT(on_finish_called == 1);
+
+  shutdown_and_destroy(cc);
+}
+
+static void test_cq_end_finish_accepted() {
+  grpc_event *ev;
+  grpc_completion_queue *cc;
+  int on_finish_called = 0;
+  void *tag = create_test_tag();
+
+  LOG_TEST();
+
+  cc = grpc_completion_queue_create();
+
+  grpc_cq_begin_op(cc, NULL, GRPC_FINISH_ACCEPTED);
+  grpc_cq_end_finish_accepted(cc, tag, NULL, increment_int_on_finish,
+                              &on_finish_called, GRPC_OP_OK);
+
+  ev = grpc_completion_queue_next(cc, gpr_inf_past);
+  GPR_ASSERT(ev != NULL);
+  GPR_ASSERT(ev->type == GRPC_FINISH_ACCEPTED);
+  GPR_ASSERT(ev->tag == tag);
+  GPR_ASSERT(ev->data.finish_accepted == GRPC_OP_OK);
+  GPR_ASSERT(on_finish_called == 0);
+  grpc_event_finish(ev);
+  GPR_ASSERT(on_finish_called == 1);
+
+  shutdown_and_destroy(cc);
+}
+
+static void test_cq_end_client_metadata_read() {
+  grpc_event *ev;
+  grpc_completion_queue *cc;
+  int on_finish_called = 0;
+  void *tag = create_test_tag();
+
+  LOG_TEST();
+
+  cc = grpc_completion_queue_create();
+
+  grpc_cq_begin_op(cc, NULL, GRPC_CLIENT_METADATA_READ);
+  grpc_cq_end_client_metadata_read(cc, tag, NULL, increment_int_on_finish,
+                                   &on_finish_called, 0, NULL);
+
+  ev = grpc_completion_queue_next(cc, gpr_inf_past);
+  GPR_ASSERT(ev != NULL);
+  GPR_ASSERT(ev->type == GRPC_CLIENT_METADATA_READ);
+  GPR_ASSERT(ev->tag == tag);
+  GPR_ASSERT(ev->data.client_metadata_read.count == 0);
+  GPR_ASSERT(ev->data.client_metadata_read.elements == NULL);
+  GPR_ASSERT(on_finish_called == 0);
+  grpc_event_finish(ev);
+  GPR_ASSERT(on_finish_called == 1);
+
+  shutdown_and_destroy(cc);
+}
+
+static void test_pluck() {
+  grpc_event *ev;
+  grpc_completion_queue *cc;
+  void *tags[128];
+  int i, j;
+  int on_finish_called = 0;
+
+  LOG_TEST();
+
+  for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
+    tags[i] = create_test_tag();
+    for (j = 0; j < i; j++) {
+      GPR_ASSERT(tags[i] != tags[j]);
+    }
+  }
+
+  cc = grpc_completion_queue_create();
+
+  for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
+    grpc_cq_begin_op(cc, NULL, GRPC_WRITE_ACCEPTED);
+    grpc_cq_end_write_accepted(cc, tags[i], NULL, increment_int_on_finish,
+                               &on_finish_called, GRPC_OP_OK);
+  }
+
+  for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
+    ev = grpc_completion_queue_pluck(cc, tags[i], gpr_inf_past);
+    GPR_ASSERT(ev->tag == tags[i]);
+    grpc_event_finish(ev);
+  }
+
+  GPR_ASSERT(on_finish_called == GPR_ARRAY_SIZE(tags));
+
+  for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
+    grpc_cq_begin_op(cc, NULL, GRPC_WRITE_ACCEPTED);
+    grpc_cq_end_write_accepted(cc, tags[i], NULL, increment_int_on_finish,
+                               &on_finish_called, GRPC_OP_OK);
+  }
+
+  for (i = 0; i < GPR_ARRAY_SIZE(tags); i++) {
+    ev = grpc_completion_queue_pluck(cc, tags[GPR_ARRAY_SIZE(tags) - i - 1],
+                                     gpr_inf_past);
+    GPR_ASSERT(ev->tag == tags[GPR_ARRAY_SIZE(tags) - i - 1]);
+    grpc_event_finish(ev);
+  }
+
+  GPR_ASSERT(on_finish_called == 2 * GPR_ARRAY_SIZE(tags));
+
+  shutdown_and_destroy(cc);
+}
+
+#define TEST_THREAD_EVENTS 10000
+
+typedef struct test_thread_options {
+  gpr_event on_started;
+  gpr_event *phase1;
+  gpr_event on_phase1_done;
+  gpr_event *phase2;
+  gpr_event on_finished;
+  int events_triggered;
+  int id;
+  grpc_completion_queue *cc;
+} test_thread_options;
+
+gpr_timespec ten_seconds_time() {
+  return gpr_time_add(gpr_now(), gpr_time_from_micros(10 * 1000000));
+}
+
+static void producer_thread(void *arg) {
+  test_thread_options *opt = arg;
+  int i;
+
+  gpr_log(GPR_INFO, "producer %d started", opt->id);
+  gpr_event_set(&opt->on_started, (void *)(gpr_intptr) 1);
+  GPR_ASSERT(gpr_event_wait(opt->phase1, ten_seconds_time()));
+
+  gpr_log(GPR_INFO, "producer %d phase 1", opt->id);
+  for (i = 0; i < TEST_THREAD_EVENTS; i++) {
+    grpc_cq_begin_op(opt->cc, NULL, GRPC_WRITE_ACCEPTED);
+  }
+
+  gpr_log(GPR_INFO, "producer %d phase 1 done", opt->id);
+  gpr_event_set(&opt->on_phase1_done, (void *)(gpr_intptr) 1);
+  GPR_ASSERT(gpr_event_wait(opt->phase2, ten_seconds_time()));
+
+  gpr_log(GPR_INFO, "producer %d phase 2", opt->id);
+  for (i = 0; i < TEST_THREAD_EVENTS; i++) {
+    grpc_cq_end_write_accepted(opt->cc, (void *)(gpr_intptr) 1, NULL, NULL,
+                               NULL, GRPC_OP_OK);
+    opt->events_triggered++;
+  }
+
+  gpr_log(GPR_INFO, "producer %d phase 2 done", opt->id);
+  gpr_event_set(&opt->on_finished, (void *)(gpr_intptr) 1);
+}
+
+static void consumer_thread(void *arg) {
+  test_thread_options *opt = arg;
+  grpc_event *ev;
+
+  gpr_log(GPR_INFO, "consumer %d started", opt->id);
+  gpr_event_set(&opt->on_started, (void *)(gpr_intptr) 1);
+  GPR_ASSERT(gpr_event_wait(opt->phase1, ten_seconds_time()));
+
+  gpr_log(GPR_INFO, "consumer %d phase 1", opt->id);
+
+  gpr_log(GPR_INFO, "consumer %d phase 1 done", opt->id);
+  gpr_event_set(&opt->on_phase1_done, (void *)(gpr_intptr) 1);
+  GPR_ASSERT(gpr_event_wait(opt->phase2, ten_seconds_time()));
+
+  gpr_log(GPR_INFO, "consumer %d phase 2", opt->id);
+  for (;;) {
+    ev = grpc_completion_queue_next(opt->cc, ten_seconds_time());
+    GPR_ASSERT(ev);
+    switch (ev->type) {
+      case GRPC_WRITE_ACCEPTED:
+        GPR_ASSERT(ev->data.write_accepted == GRPC_OP_OK);
+        opt->events_triggered++;
+        grpc_event_finish(ev);
+        break;
+      case GRPC_QUEUE_SHUTDOWN:
+        gpr_log(GPR_INFO, "consumer %d phase 2 done", opt->id);
+        gpr_event_set(&opt->on_finished, (void *)(gpr_intptr) 1);
+        grpc_event_finish(ev);
+        return;
+      default:
+        gpr_log(GPR_ERROR, "Invalid event received: %d", ev->type);
+        abort();
+    }
+  }
+}
+
+static void test_threading(int producers, int consumers) {
+  test_thread_options *options =
+      gpr_malloc((producers + consumers) * sizeof(test_thread_options));
+  gpr_event phase1 = GPR_EVENT_INIT;
+  gpr_event phase2 = GPR_EVENT_INIT;
+  grpc_completion_queue *cc = grpc_completion_queue_create();
+  int i;
+  int total_consumed = 0;
+  static int optid = 101;
+
+  gpr_log(GPR_INFO, "%s: %d producers, %d consumers", __FUNCTION__, producers,
+          consumers);
+
+  grpc_completion_queue_dont_poll_test_only(cc);
+
+  /* start all threads: they will wait for phase1 */
+  for (i = 0; i < producers + consumers; i++) {
+    gpr_thd_id id;
+    gpr_event_init(&options[i].on_started);
+    gpr_event_init(&options[i].on_phase1_done);
+    gpr_event_init(&options[i].on_finished);
+    options[i].phase1 = &phase1;
+    options[i].phase2 = &phase2;
+    options[i].events_triggered = 0;
+    options[i].cc = cc;
+    options[i].id = optid++;
+    GPR_ASSERT(gpr_thd_new(&id,
+                           i < producers ? producer_thread : consumer_thread,
+                           options + i, NULL));
+    gpr_event_wait(&options[i].on_started, ten_seconds_time());
+  }
+
+  /* start phase1: producers will pre-declare all operations they will
+     complete */
+  gpr_log(GPR_INFO, "start phase 1");
+  gpr_event_set(&phase1, (void *)(gpr_intptr) 1);
+
+  gpr_log(GPR_INFO, "wait phase 1");
+  for (i = 0; i < producers + consumers; i++) {
+    GPR_ASSERT(gpr_event_wait(&options[i].on_phase1_done, ten_seconds_time()));
+  }
+  gpr_log(GPR_INFO, "done phase 1");
+
+  /* start phase2: operations will complete, and consumers will consume them */
+  gpr_log(GPR_INFO, "start phase 2");
+  gpr_event_set(&phase2, (void *)(gpr_intptr) 1);
+
+  /* in parallel, we shutdown the completion channel - all events should still
+     be consumed */
+  grpc_completion_queue_shutdown(cc);
+
+  /* join all threads */
+  gpr_log(GPR_INFO, "wait phase 2");
+  for (i = 0; i < producers + consumers; i++) {
+    GPR_ASSERT(gpr_event_wait(&options[i].on_finished, ten_seconds_time()));
+  }
+  gpr_log(GPR_INFO, "done phase 2");
+
+  /* destroy the completion channel */
+  grpc_completion_queue_destroy(cc);
+
+  /* verify that everything was produced and consumed */
+  for (i = 0; i < producers + consumers; i++) {
+    if (i < producers) {
+      GPR_ASSERT(options[i].events_triggered == TEST_THREAD_EVENTS);
+    } else {
+      total_consumed += options[i].events_triggered;
+    }
+  }
+  GPR_ASSERT(total_consumed == producers * TEST_THREAD_EVENTS);
+
+  gpr_free(options);
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  grpc_surface_em_init();
+  test_no_op();
+  test_wait_empty();
+  test_cq_end_read();
+  test_cq_end_invoke_accepted();
+  test_cq_end_write_accepted();
+  test_cq_end_finish_accepted();
+  test_cq_end_client_metadata_read();
+  test_pluck();
+  test_threading(1, 1);
+  test_threading(1, 10);
+  test_threading(10, 1);
+  test_threading(10, 10);
+  grpc_surface_em_shutdown();
+  return 0;
+}
diff --git a/test/core/surface/lame_client_test.c b/test/core/surface/lame_client_test.c
new file mode 100644
index 0000000000..0520a39ea2
--- /dev/null
+++ b/test/core/surface/lame_client_test.c
@@ -0,0 +1,82 @@
+/*
+ *
+ * Copyright 2014, 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/surface/lame_client.h"
+
+#include "test/core/end2end/cq_verifier.h"
+#include "test/core/util/test_config.h"
+#include <grpc/support/log.h>
+
+static void *tag(gpr_intptr x) { return (void *)x; }
+
+int main(int argc, char **argv) {
+  grpc_channel *chan;
+  grpc_call *call;
+  grpc_metadata md = {"a", "b", 1};
+  grpc_completion_queue *cq;
+  cq_verifier *cqv;
+
+  grpc_test_init(argc, argv);
+  grpc_init();
+
+  chan = grpc_lame_client_channel_create();
+  GPR_ASSERT(chan);
+  call = grpc_channel_create_call(
+      chan, "/Foo", "anywhere",
+      gpr_time_add(gpr_now(), gpr_time_from_seconds(100)));
+  GPR_ASSERT(call);
+  cq = grpc_completion_queue_create();
+  cqv = cq_verifier_create(cq);
+
+  /* we should be able to add metadata */
+  GPR_ASSERT(GRPC_CALL_OK == grpc_call_add_metadata(call, &md, 0));
+
+  /* and invoke the call */
+  GPR_ASSERT(GRPC_CALL_OK ==
+             grpc_call_start_invoke(call, cq, tag(1), tag(2), tag(3), 0));
+
+  /* the call should immediately fail */
+  cq_expect_invoke_accepted(cqv, tag(1), GRPC_OP_ERROR);
+  cq_expect_client_metadata_read(cqv, tag(2), NULL);
+  cq_expect_finished(cqv, tag(3), NULL);
+  cq_verify(cqv);
+
+  grpc_call_destroy(call);
+  grpc_channel_destroy(chan);
+  cq_verifier_destroy(cqv);
+  grpc_completion_queue_destroy(cq);
+
+  grpc_shutdown();
+
+  return 0;
+}