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`uv_try_write(stream, buf, size)` acts like `uv_write()`, but without queueing actual write until UV_POLLOUT (or IOCP completion). This is useful for doing writes using on-stack `uv_write_t` requests. fix joyent#1025
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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved. | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy | ||
* of this software and associated documentation files (the "Software"), to | ||
* deal in the Software without restriction, including without limitation the | ||
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | ||
* sell copies of the Software, and to permit persons to whom the Software is | ||
* furnished to do so, subject to the following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included in | ||
* all copies or substantial portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | ||
* IN THE SOFTWARE. | ||
*/ | ||
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#include "uv.h" | ||
#include "task.h" | ||
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#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <string.h> | ||
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#define MAX_BYTES 1024 * 1024 | ||
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#ifdef _WIN32 | ||
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TEST_IMPL(tcp_try_write) { | ||
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MAKE_VALGRIND_HAPPY(); | ||
return 0; | ||
} | ||
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#else /* !_WIN32 */ | ||
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static uv_tcp_t server; | ||
static uv_tcp_t client; | ||
static uv_tcp_t incoming; | ||
static int connect_cb_called; | ||
static int close_cb_called; | ||
static int connection_cb_called; | ||
static int bytes_read; | ||
static int bytes_written; | ||
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static void close_cb(uv_handle_t* handle) { | ||
close_cb_called++; | ||
} | ||
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static void connect_cb(uv_connect_t* req, int status) { | ||
static char zeroes[1024]; | ||
int r; | ||
uv_buf_t buf; | ||
ASSERT(status == 0); | ||
connect_cb_called++; | ||
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do { | ||
r = uv_try_write((uv_stream_t*) &client, zeroes, sizeof(zeroes)); | ||
ASSERT(r >= 0); | ||
bytes_written += r; | ||
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/* Partial write */ | ||
if (r != (int) sizeof(zeroes)) | ||
break; | ||
} while (1); | ||
uv_close((uv_handle_t*) &client, close_cb); | ||
} | ||
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static void alloc_cb(uv_handle_t* handle, size_t size, uv_buf_t* buf) { | ||
static char base[1024]; | ||
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buf->base = base; | ||
buf->len = sizeof(base); | ||
} | ||
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static void read_cb(uv_stream_t* tcp, ssize_t nread, const uv_buf_t* buf) { | ||
if (nread < 0) { | ||
uv_close((uv_handle_t*) tcp, close_cb); | ||
uv_close((uv_handle_t*) &server, close_cb); | ||
return; | ||
} | ||
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bytes_read += nread; | ||
} | ||
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static void connection_cb(uv_stream_t* tcp, int status) { | ||
ASSERT(status == 0); | ||
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ASSERT(0 == uv_tcp_init(tcp->loop, &incoming)); | ||
ASSERT(0 == uv_accept(tcp, (uv_stream_t*) &incoming)); | ||
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connection_cb_called++; | ||
ASSERT(0 == uv_read_start((uv_stream_t*) &incoming, alloc_cb, read_cb)); | ||
} | ||
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static void start_server(void) { | ||
struct sockaddr_in addr; | ||
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ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr)); | ||
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ASSERT(0 == uv_tcp_init(uv_default_loop(), &server)); | ||
ASSERT(0 == uv_tcp_bind(&server, (struct sockaddr*) &addr)); | ||
ASSERT(0 == uv_listen((uv_stream_t*) &server, 128, connection_cb)); | ||
} | ||
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TEST_IMPL(tcp_try_write) { | ||
uv_connect_t connect_req; | ||
struct sockaddr_in addr; | ||
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start_server(); | ||
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ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr)); | ||
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ASSERT(0 == uv_tcp_init(uv_default_loop(), &client)); | ||
ASSERT(0 == uv_tcp_connect(&connect_req, | ||
&client, | ||
(struct sockaddr*) &addr, | ||
connect_cb)); | ||
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ASSERT(0 == uv_run(uv_default_loop(), UV_RUN_DEFAULT)); | ||
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ASSERT(connect_cb_called == 1); | ||
ASSERT(close_cb_called == 3); | ||
ASSERT(connection_cb_called == 1); | ||
ASSERT(bytes_read == bytes_written); | ||
ASSERT(bytes_written > 0); | ||
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MAKE_VALGRIND_HAPPY(); | ||
return 0; | ||
} | ||
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#endif /* !_WIN32 */ |
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