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/*
*
* 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/time.h>
#include "src/core/lib/gpr/env.h"
#include "src/core/lib/gprpp/thd.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 = static_cast<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_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;
{
grpc_core::Thread thd("grpc_background_poll", &background_poll, &pargs);
thd.Start();
// Wakeup wakeup_fd not listening for events
GPR_ASSERT(grpc_wakeup_fd_wakeup(&cvfd1) == GRPC_ERROR_NONE);
thd.Join();
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;
grpc_core::Thread thd("grpc_background_poll", &background_poll, &pargs);
thd.Start();
trigger_socket_event();
thd.Join();
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;
grpc_core::Thread thd("grpc_background_poll", &background_poll, &pargs);
thd.Start();
GPR_ASSERT(grpc_wakeup_fd_wakeup(&cvfd2) == GRPC_ERROR_NONE);
thd.Join();
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;
grpc_core::Thread thd("grpc_background_poll", &background_poll, &pargs);
thd.Start();
thd.Join();
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);
grpc_core::Thread thd("grpc_background_poll", &background_poll, &pargs);
thd.Start();
thd.Join();
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_determine_iomgr_platform();
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 */
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