1/* Copyright (c) 2015, Ben Noordhuis <info@bnoordhuis.nl>
2 *
3 * Permission to use, copy, modify, and/or distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
6 *
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
10 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
12 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
13 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14 */
15
16#include "uv.h"
17#include "task.h"
18
19#include <string.h> /* memset */
20#ifndef _WIN32
21#include <unistd.h> /* close */
22#endif
23
24struct thread_ctx {
25  uv_barrier_t barrier;
26  uv_file fd;
27};
28
29static void thread_main(void* arg) {
30  struct thread_ctx* ctx;
31  uv_fs_t req;
32  uv_buf_t bufs[1];
33  char buf[4096];
34  ssize_t n;
35  int uv_errno;
36
37  bufs[0] = uv_buf_init(buf, sizeof(buf));
38
39  ctx = arg;
40  uv_barrier_wait(&ctx->barrier);
41
42  uv_sleep(100); /* make sure we are forcing the writer to block a bit */
43  do {
44    uv_errno = uv_fs_read(NULL, &req, ctx->fd, bufs, 1, -1, NULL);
45    n = req.result;
46    uv_fs_req_cleanup(&req);
47  } while (n > 0 || (n == -1 && uv_errno == UV_EINTR));
48
49  ASSERT_OK(n);
50}
51
52
53#ifdef _WIN32
54static void write_cb(uv_write_t* req, int status) {
55  ASSERT_OK(status);
56  req->handle = NULL; /* signal completion of write_cb */
57}
58#endif
59
60#ifdef _WIN32
61#define NWRITES (10 << 16)
62#else
63#define NWRITES (10 << 20)
64#endif
65
66
67TEST_IMPL(pipe_set_non_blocking) {
68  struct thread_ctx ctx;
69  uv_pipe_t pipe_handle;
70  uv_thread_t thread;
71  size_t nwritten;
72  char data[4096];
73  uv_buf_t buf;
74  uv_file fd[2];
75  int n;
76#ifdef _WIN32
77  uv_write_t write_req;
78#endif
79
80  ASSERT_OK(uv_pipe_init(uv_default_loop(), &pipe_handle, 0));
81  ASSERT_OK(uv_pipe(fd, 0, 0));
82  ASSERT_OK(uv_pipe_open(&pipe_handle, fd[1]));
83  ASSERT_OK(uv_stream_set_blocking((uv_stream_t*) &pipe_handle, 1));
84  fd[1] = -1; /* fd[1] is owned by pipe_handle now. */
85
86  ctx.fd = fd[0];
87  ASSERT_OK(uv_barrier_init(&ctx.barrier, 2));
88  ASSERT_OK(uv_thread_create(&thread, thread_main, &ctx));
89  uv_barrier_wait(&ctx.barrier);
90
91  buf.len = sizeof(data);
92  buf.base = data;
93  memset(data, '.', sizeof(data));
94
95  nwritten = 0;
96  while (nwritten < NWRITES) {
97    /* The stream is in blocking mode so uv_try_write() should always succeed
98     * with the exact number of bytes that we wanted written.
99     */
100    n = uv_try_write((uv_stream_t*) &pipe_handle, &buf, 1);
101#ifdef _WIN32
102    ASSERT_EQ(n, UV_EAGAIN); /* E_NOTIMPL */
103    ASSERT_OK(uv_write(&write_req,
104                       (uv_stream_t*) &pipe_handle,
105                       &buf,
106                       1,
107                       write_cb));
108    ASSERT_NOT_NULL(write_req.handle);
109    ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_ONCE));
110    ASSERT_NULL(write_req.handle); /* check for signaled completion of write_cb */
111    n = buf.len;
112#endif
113    ASSERT_EQ(n, sizeof(data));
114    nwritten += n;
115  }
116
117  uv_close((uv_handle_t*) &pipe_handle, NULL);
118  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
119
120  ASSERT_OK(uv_thread_join(&thread));
121#ifdef _WIN32
122  ASSERT_OK(_close(fd[0]));  /* fd[1] is closed by uv_close(). */
123#else
124  ASSERT_OK(close(fd[0]));  /* fd[1] is closed by uv_close(). */
125#endif
126  fd[0] = -1;
127  uv_barrier_destroy(&ctx.barrier);
128
129  MAKE_VALGRIND_HAPPY(uv_default_loop());
130  return 0;
131}
132