1 files changed, 234 insertions, 0 deletions
diff --git a/test/core/iomgr/wakeup_fd_cv_test.cc b/test/core/iomgr/wakeup_fd_cv_test.cc
new file mode 100644
index 0000000000..dc1d77a0ab
--- /dev/null
+++ b/test/core/iomgr/wakeup_fd_cv_test.cc
@@ -0,0 +1,234 @@
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+#include "src/core/lib/iomgr/port.h"
+
+#ifdef GRPC_POSIX_SOCKET
+
+#include <pthread.h>
+
+#include <grpc/support/log.h>
+#include <grpc/support/thd.h>
+#include <grpc/support/time.h>
+#include <grpc/support/useful.h>
+
+#include "src/core/lib/iomgr/ev_posix.h"
+#include "src/core/lib/iomgr/iomgr_posix.h"
+#include "src/core/lib/support/env.h"
+
+typedef struct poll_args {
+  struct pollfd* fds;
+  nfds_t nfds;
+  int timeout;
+  int result;
+} poll_args;
+
+gpr_cv poll_cv;
+gpr_mu poll_mu;
+static int socket_event = 0;
+
+// Trigger a "socket" POLLIN in mock_poll()
+void trigger_socket_event() {
+  gpr_mu_lock(&poll_mu);
+  socket_event = 1;
+  gpr_cv_broadcast(&poll_cv);
+  gpr_mu_unlock(&poll_mu);
+}
+
+void reset_socket_event() {
+  gpr_mu_lock(&poll_mu);
+  socket_event = 0;
+  gpr_mu_unlock(&poll_mu);
+}
+
+// Mocks posix poll() function
+int mock_poll(struct pollfd* fds, nfds_t nfds, int timeout) {
+  int res = 0;
+  gpr_timespec poll_time;
+  gpr_mu_lock(&poll_mu);
+  GPR_ASSERT(nfds == 3);
+  GPR_ASSERT(fds[0].fd == 20);
+  GPR_ASSERT(fds[1].fd == 30);
+  GPR_ASSERT(fds[2].fd == 50);
+  GPR_ASSERT(fds[0].events == (POLLIN | POLLHUP));
+  GPR_ASSERT(fds[1].events == (POLLIN | POLLHUP));
+  GPR_ASSERT(fds[2].events == POLLIN);
+
+  if (timeout < 0) {
+    poll_time = gpr_inf_future(GPR_CLOCK_REALTIME);
+  } else {
+    poll_time = gpr_time_add(gpr_now(GPR_CLOCK_REALTIME),
+                             gpr_time_from_millis(timeout, GPR_TIMESPAN));
+  }
+
+  if (socket_event || !gpr_cv_wait(&poll_cv, &poll_mu, poll_time)) {
+    fds[0].revents = POLLIN;
+    res = 1;
+  }
+  gpr_mu_unlock(&poll_mu);
+  return res;
+}
+
+void background_poll(void* args) {
+  poll_args* pargs = (poll_args*)args;
+  pargs->result = grpc_poll_function(pargs->fds, pargs->nfds, pargs->timeout);
+}
+
+void test_many_fds(void) {
+  int i;
+  grpc_wakeup_fd fd[1000];
+  for (i = 0; i < 1000; i++) {
+    GPR_ASSERT(grpc_wakeup_fd_init(&fd[i]) == GRPC_ERROR_NONE);
+  }
+  for (i = 0; i < 1000; i++) {
+    grpc_wakeup_fd_destroy(&fd[i]);
+  }
+}
+
+void test_poll_cv_trigger(void) {
+  grpc_wakeup_fd cvfd1, cvfd2, cvfd3;
+  struct pollfd pfds[6];
+  poll_args pargs;
+  gpr_thd_id t_id;
+  gpr_thd_options opt;
+
+  GPR_ASSERT(grpc_wakeup_fd_init(&cvfd1) == GRPC_ERROR_NONE);
+  GPR_ASSERT(grpc_wakeup_fd_init(&cvfd2) == GRPC_ERROR_NONE);
+  GPR_ASSERT(grpc_wakeup_fd_init(&cvfd3) == GRPC_ERROR_NONE);
+  GPR_ASSERT(cvfd1.read_fd < 0);
+  GPR_ASSERT(cvfd2.read_fd < 0);
+  GPR_ASSERT(cvfd3.read_fd < 0);
+  GPR_ASSERT(cvfd1.read_fd != cvfd2.read_fd);
+  GPR_ASSERT(cvfd2.read_fd != cvfd3.read_fd);
+  GPR_ASSERT(cvfd1.read_fd != cvfd3.read_fd);
+
+  pfds[0].fd = cvfd1.read_fd;
+  pfds[1].fd = cvfd2.read_fd;
+  pfds[2].fd = 20;
+  pfds[3].fd = 30;
+  pfds[4].fd = cvfd3.read_fd;
+  pfds[5].fd = 50;
+
+  pfds[0].events = 0;
+  pfds[1].events = POLLIN;
+  pfds[2].events = POLLIN | POLLHUP;
+  pfds[3].events = POLLIN | POLLHUP;
+  pfds[4].events = POLLIN;
+  pfds[5].events = POLLIN;
+
+  pargs.fds = pfds;
+  pargs.nfds = 6;
+  pargs.timeout = 1000;
+  pargs.result = -2;
+
+  opt = gpr_thd_options_default();
+  gpr_thd_options_set_joinable(&opt);
+  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+
+  // Wakeup wakeup_fd not listening for events
+  GPR_ASSERT(grpc_wakeup_fd_wakeup(&cvfd1) == GRPC_ERROR_NONE);
+  gpr_thd_join(t_id);
+  GPR_ASSERT(pargs.result == 0);
+  GPR_ASSERT(pfds[0].revents == 0);
+  GPR_ASSERT(pfds[1].revents == 0);
+  GPR_ASSERT(pfds[2].revents == 0);
+  GPR_ASSERT(pfds[3].revents == 0);
+  GPR_ASSERT(pfds[4].revents == 0);
+  GPR_ASSERT(pfds[5].revents == 0);
+
+  // Pollin on socket fd
+  pargs.timeout = -1;
+  pargs.result = -2;
+  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  trigger_socket_event();
+  gpr_thd_join(t_id);
+  GPR_ASSERT(pargs.result == 1);
+  GPR_ASSERT(pfds[0].revents == 0);
+  GPR_ASSERT(pfds[1].revents == 0);
+  GPR_ASSERT(pfds[2].revents == POLLIN);
+  GPR_ASSERT(pfds[3].revents == 0);
+  GPR_ASSERT(pfds[4].revents == 0);
+  GPR_ASSERT(pfds[5].revents == 0);
+
+  // Pollin on wakeup fd
+  reset_socket_event();
+  pargs.result = -2;
+  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  GPR_ASSERT(grpc_wakeup_fd_wakeup(&cvfd2) == GRPC_ERROR_NONE);
+  gpr_thd_join(t_id);
+
+  GPR_ASSERT(pargs.result == 1);
+  GPR_ASSERT(pfds[0].revents == 0);
+  GPR_ASSERT(pfds[1].revents == POLLIN);
+  GPR_ASSERT(pfds[2].revents == 0);
+  GPR_ASSERT(pfds[3].revents == 0);
+  GPR_ASSERT(pfds[4].revents == 0);
+  GPR_ASSERT(pfds[5].revents == 0);
+
+  // Pollin on wakeupfd before poll()
+  pargs.result = -2;
+  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_join(t_id);
+
+  GPR_ASSERT(pargs.result == 1);
+  GPR_ASSERT(pfds[0].revents == 0);
+  GPR_ASSERT(pfds[1].revents == POLLIN);
+  GPR_ASSERT(pfds[2].revents == 0);
+  GPR_ASSERT(pfds[3].revents == 0);
+  GPR_ASSERT(pfds[4].revents == 0);
+  GPR_ASSERT(pfds[5].revents == 0);
+
+  // No Events
+  pargs.result = -2;
+  pargs.timeout = 1000;
+  reset_socket_event();
+  GPR_ASSERT(grpc_wakeup_fd_consume_wakeup(&cvfd1) == GRPC_ERROR_NONE);
+  GPR_ASSERT(grpc_wakeup_fd_consume_wakeup(&cvfd2) == GRPC_ERROR_NONE);
+  gpr_thd_new(&t_id, &background_poll, &pargs, &opt);
+  gpr_thd_join(t_id);
+
+  GPR_ASSERT(pargs.result == 0);
+  GPR_ASSERT(pfds[0].revents == 0);
+  GPR_ASSERT(pfds[1].revents == 0);
+  GPR_ASSERT(pfds[2].revents == 0);
+  GPR_ASSERT(pfds[3].revents == 0);
+  GPR_ASSERT(pfds[4].revents == 0);
+  GPR_ASSERT(pfds[5].revents == 0);
+}
+
+int main(int argc, char** argv) {
+  gpr_setenv("GRPC_POLL_STRATEGY", "poll-cv");
+  grpc_poll_function = &mock_poll;
+  gpr_mu_init(&poll_mu);
+  gpr_cv_init(&poll_cv);
+
+  grpc_iomgr_platform_init();
+  test_many_fds();
+  grpc_iomgr_platform_shutdown();
+
+  grpc_iomgr_platform_init();
+  test_poll_cv_trigger();
+  grpc_iomgr_platform_shutdown();
+  return 0;
+}
+
+#else /* GRPC_POSIX_SOCKET */
+
+int main(int argc, char** argv) { return 1; }
+
+#endif /* GRPC_POSIX_SOCKET */