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LFtid1056/lib/libuv-v1.51.0/test/test-udp-reuseport.c
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287
LFtid1056/lib/libuv-v1.51.0/test/test-udp-reuseport.c
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/* Copyright libuv project contributors. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "uv.h"
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#include "task.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#if !defined(__linux__) && !defined(__FreeBSD__) && \
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!defined(__DragonFly__) && !defined(__sun) && !defined(_AIX73)
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TEST_IMPL(udp_reuseport) {
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struct sockaddr_in addr1, addr2, addr3;
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uv_loop_t* loop;
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uv_udp_t handle1, handle2, handle3;
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int r;
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ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr1));
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ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT_2, &addr2));
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ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT_3, &addr3));
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loop = uv_default_loop();
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ASSERT_NOT_NULL(loop);
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r = uv_udp_init(loop, &handle1);
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ASSERT_OK(r);
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r = uv_udp_bind(&handle1, (const struct sockaddr*) &addr1, UV_UDP_REUSEADDR);
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ASSERT_OK(r);
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r = uv_udp_init(loop, &handle2);
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ASSERT_OK(r);
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r = uv_udp_bind(&handle2, (const struct sockaddr*) &addr2, UV_UDP_REUSEPORT);
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ASSERT_EQ(r, UV_ENOTSUP);
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r = uv_udp_init(loop, &handle3);
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ASSERT_OK(r);
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/* For platforms where SO_REUSEPORTs don't have the capability of
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* load balancing, specifying both UV_UDP_REUSEADDR and UV_UDP_REUSEPORT
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* in flags will fail, returning an UV_ENOTSUP error. */
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r = uv_udp_bind(&handle3, (const struct sockaddr*) &addr3,
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UV_UDP_REUSEADDR | UV_UDP_REUSEPORT);
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ASSERT_EQ(r, UV_ENOTSUP);
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MAKE_VALGRIND_HAPPY(loop);
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return 0;
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}
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#else
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#define NUM_RECEIVING_THREADS 2
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#define MAX_UDP_DATAGRAMS 10
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static uv_udp_t udp_send_handles[MAX_UDP_DATAGRAMS];
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static uv_udp_send_t udp_send_requests[MAX_UDP_DATAGRAMS];
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static uv_sem_t semaphore;
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static uv_mutex_t mutex;
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static unsigned int received;
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static unsigned int thread_loop1_recv;
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static unsigned int thread_loop2_recv;
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static unsigned int sent;
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static uv_loop_t* main_loop;
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static uv_loop_t thread_loop1;
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static uv_loop_t thread_loop2;
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static uv_udp_t thread_handle1;
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static uv_udp_t thread_handle2;
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static uv_timer_t thread_timer_handle1;
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static uv_timer_t thread_timer_handle2;
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static void alloc_cb(uv_handle_t* handle,
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size_t suggested_size,
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uv_buf_t* buf) {
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buf->base = malloc(suggested_size);
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buf->len = (int) suggested_size;
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}
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static void ticktack(uv_timer_t* timer) {
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int done = 0;
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ASSERT(timer == &thread_timer_handle1 || timer == &thread_timer_handle2);
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uv_mutex_lock(&mutex);
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if (received == MAX_UDP_DATAGRAMS) {
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done = 1;
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}
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uv_mutex_unlock(&mutex);
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if (done) {
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uv_close((uv_handle_t*) timer, NULL);
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if (timer->loop == &thread_loop1)
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uv_close((uv_handle_t*) &thread_handle1, NULL);
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if (timer->loop == &thread_loop2)
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uv_close((uv_handle_t*) &thread_handle2, NULL);
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}
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}
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static void on_recv(uv_udp_t* handle,
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ssize_t nr,
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const uv_buf_t* buf,
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const struct sockaddr* addr,
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unsigned flags) {
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ASSERT_OK(flags);
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ASSERT(handle == &thread_handle1 || handle == &thread_handle2);
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ASSERT_GE(nr, 0);
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if (nr == 0) {
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ASSERT_NULL(addr);
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free(buf->base);
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return;
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}
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ASSERT_NOT_NULL(addr);
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ASSERT_EQ(5, nr);
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ASSERT(!memcmp("Hello", buf->base, nr));
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free(buf->base);
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if (handle->loop == &thread_loop1)
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thread_loop1_recv++;
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if (handle->loop == &thread_loop2)
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thread_loop2_recv++;
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uv_mutex_lock(&mutex);
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received++;
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uv_mutex_unlock(&mutex);
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}
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static void on_send(uv_udp_send_t* req, int status) {
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ASSERT_OK(status);
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ASSERT_PTR_EQ(req->handle->loop, main_loop);
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if (++sent == MAX_UDP_DATAGRAMS)
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uv_close((uv_handle_t*) req->handle, NULL);
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}
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static void bind_socket_and_prepare_recv(uv_loop_t* loop, uv_udp_t* handle) {
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struct sockaddr_in addr;
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int r;
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ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
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r = uv_udp_init(loop, handle);
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ASSERT_OK(r);
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/* For platforms where SO_REUSEPORTs have the capability of
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* load balancing, specifying both UV_UDP_REUSEADDR and
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* UV_UDP_REUSEPORT in flags is allowed and SO_REUSEPORT will
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* always override the behavior of SO_REUSEADDR. */
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r = uv_udp_bind(handle, (const struct sockaddr*) &addr,
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UV_UDP_REUSEADDR | UV_UDP_REUSEPORT);
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ASSERT_OK(r);
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r = uv_udp_recv_start(handle, alloc_cb, on_recv);
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ASSERT_OK(r);
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}
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static void run_event_loop(void* arg) {
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int r;
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uv_udp_t* handle;
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uv_timer_t* timer;
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uv_loop_t* loop = (uv_loop_t*) arg;
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ASSERT(loop == &thread_loop1 || loop == &thread_loop2);
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if (loop == &thread_loop1) {
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handle = &thread_handle1;
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timer = &thread_timer_handle1;
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} else {
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handle = &thread_handle2;
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timer = &thread_timer_handle2;
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}
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bind_socket_and_prepare_recv(loop, handle);
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r = uv_timer_init(loop, timer);
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ASSERT_OK(r);
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r = uv_timer_start(timer, ticktack, 0, 10);
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ASSERT_OK(r);
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/* Notify the main thread to start sending data. */
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uv_sem_post(&semaphore);
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r = uv_run(loop, UV_RUN_DEFAULT);
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ASSERT_OK(r);
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}
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TEST_IMPL(udp_reuseport) {
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struct sockaddr_in addr;
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uv_buf_t buf;
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int r;
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int i;
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r = uv_mutex_init(&mutex);
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ASSERT_OK(r);
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r = uv_sem_init(&semaphore, 0);
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ASSERT_OK(r);
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main_loop = uv_default_loop();
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ASSERT_NOT_NULL(main_loop);
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/* Run event loops of receiving sockets in separate threads. */
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uv_loop_init(&thread_loop1);
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uv_loop_init(&thread_loop2);
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uv_thread_t thread_loop_id1;
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uv_thread_t thread_loop_id2;
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uv_thread_create(&thread_loop_id1, run_event_loop, &thread_loop1);
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uv_thread_create(&thread_loop_id2, run_event_loop, &thread_loop2);
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/* Wait until all threads to poll for receiving datagrams
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* before we start to sending. Otherwise the incoming datagrams
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* might not be distributed across all receiving threads. */
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for (i = 0; i < NUM_RECEIVING_THREADS; i++)
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uv_sem_wait(&semaphore);
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/* Now we know all threads are up and entering the uv_run(),
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* but we still sleep a little bit just for dual fail-safe. */
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uv_sleep(100);
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/* Start sending datagrams to the peers. */
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buf = uv_buf_init("Hello", 5);
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ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
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for (i = 0; i < MAX_UDP_DATAGRAMS; i++) {
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r = uv_udp_init(main_loop, &udp_send_handles[i]);
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ASSERT_OK(r);
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r = uv_udp_send(&udp_send_requests[i],
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&udp_send_handles[i],
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&buf,
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1,
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(const struct sockaddr*) &addr,
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on_send);
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ASSERT_OK(r);
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}
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r = uv_run(main_loop, UV_RUN_DEFAULT);
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ASSERT_OK(r);
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/* Wait for all threads to exit. */
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uv_thread_join(&thread_loop_id1);
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uv_thread_join(&thread_loop_id2);
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/* Verify if each receiving socket per event loop received datagrams
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* and the amount of received datagrams matches the one of sent datagrams.
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*/
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ASSERT_EQ(received, MAX_UDP_DATAGRAMS);
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ASSERT_EQ(sent, MAX_UDP_DATAGRAMS);
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ASSERT_GT(thread_loop1_recv, 0);
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ASSERT_GT(thread_loop2_recv, 0);
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ASSERT_EQ(thread_loop1_recv + thread_loop2_recv, sent);
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/* Clean up. */
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uv_mutex_destroy(&mutex);
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uv_sem_destroy(&semaphore);
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uv_loop_close(&thread_loop1);
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uv_loop_close(&thread_loop2);
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MAKE_VALGRIND_HAPPY(main_loop);
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return 0;
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}
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#endif
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