grpc1.45.2/third_party/libuv/test/test-watcher-cross-stop.c

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 *
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#include "uv.h"
#include "task.h"

#include <string.h>
#include <errno.h>

/* NOTE: Number should be big enough to trigger this problem */
#if defined(__CYGWIN__) || defined(__MSYS__) || defined(__PASE__)
/* Cygwin crashes or hangs in socket() with too many AF_INET sockets.  */
/* IBMi PASE timeout with too many AF_INET sockets.  */
static uv_udp_t sockets[1250];
#else
static uv_udp_t sockets[2500];
#endif
static uv_udp_send_t reqs[ARRAY_SIZE(sockets)];
static char slab[1];
static unsigned int recv_cb_called;
static unsigned int send_cb_called;
static unsigned int close_cb_called;

static void alloc_cb(uv_handle_t* handle, size_t size, uv_buf_t* buf) {
  buf->base = slab;
  buf->len = sizeof(slab);
}


static void recv_cb(uv_udp_t* handle,
                    ssize_t nread,
                    const uv_buf_t* buf,
                    const struct sockaddr* addr,
                    unsigned flags) {
  recv_cb_called++;
}


static void send_cb(uv_udp_send_t* req, int status) {
  send_cb_called++;
}


static void close_cb(uv_handle_t* handle) {
  close_cb_called++;
}


TEST_IMPL(watcher_cross_stop) {
#if defined(__MVS__)
  RETURN_SKIP("zOS does not allow address or port reuse when using UDP sockets");
#endif
  uv_loop_t* loop = uv_default_loop();
  unsigned int i;
  struct sockaddr_in addr;
  uv_buf_t buf;
  char big_string[1024];

  TEST_FILE_LIMIT(ARRAY_SIZE(sockets) + 32);

  ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
  memset(big_string, 'A', sizeof(big_string));
  buf = uv_buf_init(big_string, sizeof(big_string));

  for (i = 0; i < ARRAY_SIZE(sockets); i++) {
    ASSERT(0 == uv_udp_init(loop, &sockets[i]));
    ASSERT(0 == uv_udp_bind(&sockets[i],
                            (const struct sockaddr*) &addr,
                            UV_UDP_REUSEADDR));
    ASSERT(0 == uv_udp_recv_start(&sockets[i], alloc_cb, recv_cb));
    ASSERT(0 == uv_udp_send(&reqs[i],
                            &sockets[i],
                            &buf,
                            1,
                            (const struct sockaddr*) &addr,
                            send_cb));
  }

  while (recv_cb_called == 0)
    uv_run(loop, UV_RUN_ONCE);

  for (i = 0; i < ARRAY_SIZE(sockets); i++)
    uv_close((uv_handle_t*) &sockets[i], close_cb);

  ASSERT(recv_cb_called > 0);

  uv_run(loop, UV_RUN_DEFAULT);

  ASSERT(ARRAY_SIZE(sockets) == send_cb_called);
  ASSERT(ARRAY_SIZE(sockets) == close_cb_called);

  MAKE_VALGRIND_HAPPY();
  return 0;
}