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开启协程后，stream_set_blocking 被强制设定阻塞状态了?

### 问题描述

在 swoole协程应用中, 使用 [`symfony/process`](https://packagist.org/packages/symfony/process)  库遇到问题，`stream_set_blocking($resource, 0)` 设置非阻塞无效，导致应用库不能按预期执行.

### Swoole版本，PHP版本，以及操作系统版本信息

```
~$ php --ri swoole

swoole

Swoole => enabled
Author => Swoole Team <team@swoole.com>
Version => 4.5.2
Built => Jul 17 2020 14:01:02
coroutine => enabled
epoll => enabled
eventfd => enabled
signalfd => enabled
cpu_affinity => enabled
spinlock => enabled
rwlock => enabled
openssl => OpenSSL 1.1.1g  21 Apr 2020
pcre => enabled
mutex_timedlock => enabled
pthread_barrier => enabled
futex => enabled
async_redis => enabled

Directive => Local Value => Master Value
swoole.enable_coroutine => On => On
swoole.enable_library => On => On
swoole.enable_preemptive_scheduler => Off => Off
swoole.display_errors => On => On
swoole.use_shortname => On => On
swoole.unixsock_buffer_size => 8388608 => 8388608

~$ uname -a && php -v && gcc -v
Linux xiemaomao 4.19.104-microsoft-standard #1 SMP Wed Feb 19 06:37:35 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
PHP 7.4.9 (cli) (built: Aug  7 2020 14:29:36) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.9, Copyright (c), by Zend Technologies
    with Sdebug v2.9.3-dev, Copyright (c) 2002-2020, by Derick Rethans
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 7.5.0-3ubuntu1~18.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-7 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)
```

### 相关代码

```php
\Swoole\Runtime::enableCoroutine(true);

go(function () {
    @proc_open('echo hello && sleep 3000 && echo world',  [ ['pipe', 'r',],['pipe', 'w',], ['pipe', 'w',], ],$pipes);
    foreach ($pipes as $pipe) {
        stream_set_blocking($pipe, 0);  //开启协程后，非阻塞设定都无效了. 
    }
    var_dump(fread($pipes[1], 1024)); //当前会阻塞读取
    var_dump(fread($pipes[1], 1024));
});
```

### 你期待的结果是什么？实际看到的错误信息又是什么？

不要影响 `stream_set_blocking` 非阻塞设置.

```php
\Swoole\Runtime::enableCoroutine(true);

go(function () {
    @proc_open('echo hello && sleep 3000 && echo world',  [ ['pipe', 'r',],['pipe', 'w',], ['pipe', 'w',], ],$pipes);
    foreach ($pipes as $pipe) {
        stream_set_blocking($pipe, 0);  // 实现非阻塞 
    }
    var_dump(fread($pipes[1], 1024)); // 实现非阻塞读取
    var_dump(fread($pipes[1], 1024));
});
```

发布于3年前 · 2 次浏览 · 来自提问

Moln

### 问题描述

### Swoole版本，PHP版本，以及操作系统版本信息

```
~$ php --ri swoole

swoole

### 相关代码

```php
\Swoole\Runtime::enableCoroutine(true);

### 你期待的结果是什么？实际看到的错误信息又是什么？

不要影响 `stream_set_blocking` 非阻塞设置.

```php
\Swoole\Runtime::enableCoroutine(true);

go(function () {
    @proc_open('echo hello && sleep 3000 && echo world',  [ ['pipe', 'r',],['pipe', 'w',], ['pipe', 'w',], ],$pipes);
    foreach ($pipes as $pipe) {
        stream_set_blocking($pipe, 0);  // 实现非阻塞 
    }
    var_dump(fread($pipes[1], 1024)); // 实现非阻塞读取
    var_dump(fread($pipes[1], 1024));
});
```