| /* |
| * |
| * 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/gpr/env.h" |
| #include "src/core/lib/iomgr/ev_posix.h" |
| #include "src/core/lib/iomgr/iomgr_posix.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, "grpc_background_poll", &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, "grpc_background_poll", &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, "grpc_background_poll", &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, "grpc_background_poll", &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, "grpc_background_poll", &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 */ |