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Daniil Gentili 2023-08-27 16:23:04 +02:00
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/target
/Cargo.lock
/crates/*/target
/vendor/

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{
"rust-analyzer.linkedProjects": [
"./crates/macros/Cargo.toml"
]
}

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[package]
name = "php-tokio"
repository = "https://github.com/danog/php-tokio"
homepage = "https://github.com/danog/php-tokio"
license = "AGPLv3"
version = "0.1.0"
authors = ["Daniil Gentili <daniil@daniil.it>"]
edition = "2021"
[dependencies]
ext-php-rs = { git = "https://github.com/nicelocal/ext-php-rs", features = ["anyhow"] }
tokio = { version = "1", features = ["full"] }
tokio-pipe = "*"
lazy_static = "1.4.0"
libc = "*"
php-tokio-derive = { version = "=0.1.0", path = "./crates/macros" }
[workspace]
members = [
"crates/macros",
]

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but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<http://www.gnu.org/licenses/>.

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# php-tokio - Use any async rust library from PHP!
Created by Daniil Gentili ([@danog](https://github.com/danog)).
This library allows you to use any async rust library from PHP, asynchronously.
It's fully integrated with [revolt](https://revolt.run): this allows full compatibility with [amphp](https://amphp.org), [PSL](https://github.com/azjezz/psl) and reactphp.
## Usage
## Built with php-tokio
Here's a list of async PHP extensions built with php-tokio (add yours by editing this file!):
- [nicelocal/mongo-php-async-driver](https://github.com/Nicelocal/mongo-php-async-driver) - An async MongoDB PHP extension

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crates/macros/Cargo.lock generated Normal file
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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "anyhow"
version = "1.0.75"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
[[package]]
name = "php-tokio-derive"
version = "0.1.0"
dependencies = [
"anyhow",
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "proc-macro2"
version = "1.0.66"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
dependencies = [
"unicode-ident",
]
[[package]]
name = "quote"
version = "1.0.33"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
dependencies = [
"proc-macro2",
]
[[package]]
name = "syn"
version = "2.0.29"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c324c494eba9d92503e6f1ef2e6df781e78f6a7705a0202d9801b198807d518a"
dependencies = [
"proc-macro2",
"quote",
"unicode-ident",
]
[[package]]
name = "unicode-ident"
version = "1.0.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "301abaae475aa91687eb82514b328ab47a211a533026cb25fc3e519b86adfc3c"

18
crates/macros/Cargo.toml Normal file
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[package]
name = "php-tokio-derive"
description = "Derive macros for php-tokio."
repository = "https://github.com/danog/php-tokio"
homepage = "https://github.com/danog/php-tokio"
license = "AGPLv3"
version = "0.1.0"
authors = ["Daniil Gentili <daniil@daniil.it>"]
edition = "2021"
[lib]
proc-macro = true
[dependencies]
syn = { version = "^2", features = ["full", "extra-traits", "printing"] }
quote = "^1"
proc-macro2 = "^1"
anyhow = "^1.0"

143
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use anyhow::{bail, Result};
use proc_macro2::Span;
use proc_macro2::TokenStream;
use quote::TokenStreamExt;
use quote::{quote, ToTokens};
use syn::parse_quote;
use syn::FnArg;
use syn::GenericArgument;
use syn::ImplItemFn;
use syn::Pat;
use syn::PathArguments;
use syn::Type;
use syn::{parse_macro_input, ItemImpl};
#[proc_macro_attribute]
pub fn php_async_impl(
_: proc_macro::TokenStream,
input: proc_macro::TokenStream,
) -> proc_macro::TokenStream {
match parser(parse_macro_input!(input as ItemImpl)) {
Ok(parsed) => parsed,
Err(e) => syn::Error::new(Span::call_site(), e).to_compile_error(),
}
.into()
}
fn parser(input: ItemImpl) -> Result<TokenStream> {
let ItemImpl { self_ty, items, .. } = input;
if input.trait_.is_some() {
bail!("This macro cannot be used on trait implementations.");
}
let tokens = items
.into_iter()
.map(|item| {
Ok(match item {
syn::ImplItem::Fn(method) => handle_method(method)?,
item => item.to_token_stream(),
})
})
.collect::<Result<Vec<_>>>()?;
let output = quote! {
#[::ext_php_rs::php_impl]
impl #self_ty {
#(#tokens)*
}
};
Ok(output)
}
fn handle_method(input: ImplItemFn) -> Result<TokenStream> {
let mut receiver = false;
let mut receiver_mutable = false;
let mut hack_tokens = quote! {};
for arg in input.sig.inputs.iter() {
match arg {
FnArg::Receiver(r) => {
receiver = true;
receiver_mutable = r.mutability.is_some();
}
FnArg::Typed(ty) => {
let mut this = false;
for attr in ty.attrs.iter() {
if attr.path().to_token_stream().to_string() == "this" {
this = true;
}
}
if !this {
let param = match &*ty.pat {
Pat::Ident(pat) => &pat.ident,
_ => bail!("Invalid parameter type."),
};
let mut ty_inner = &*ty.ty;
let mut is_option = false;
if let Type::Path(t) = ty_inner {
if t.path.segments[0].ident.to_string() == "Option" {
if let PathArguments::AngleBracketed(t) = &t.path.segments[0].arguments
{
if let GenericArgument::Type(t) = &t.args[0] {
ty_inner = t;
is_option = true;
}
}
}
}
let mut is_str = false;
if let Type::Reference(t) = ty_inner {
if t.mutability.is_none() {
if let Type::Path(t) = &*t.elem {
is_str = t.path.is_ident("str");
}
}
hack_tokens.append_all(if is_str {
if is_option {
quote! { let #param = #param.and_then(|__temp| Some(unsafe { ::core::mem::transmute::<&str, &'static str>(__temp) })); }
} else {
quote! { let #param = unsafe { ::core::mem::transmute::<&str, &'static str>(#param) }; }
}
} else {
if is_option {
quote! { let #param = #param.and_then(|__temp| Some(unsafe { ::php_tokio::borrow_unchecked::borrow_unchecked(__temp) })); }
} else {
quote! { let #param = unsafe { ::php_tokio::borrow_unchecked::borrow_unchecked(#param) }; }
}
});
}
}
}
}
}
let mut input = input.clone();
if input.sig.asyncness.is_some() {
input.sig.asyncness = None;
let stmts = input.block;
let this = if receiver {
if receiver_mutable {
quote! { let this = unsafe { std::mem::transmute::<&mut Self, &'static mut Self>(self) }; }
} else {
quote! { let this = unsafe { std::mem::transmute::<&Self, &'static Self>(self) }; }
}
} else {
quote! {}
};
input.block = parse_quote! {{
#this
#hack_tokens
::php_tokio::EventLoop::suspend_on(async move #stmts)
}};
}
let result = quote! {
#input
};
Ok(result)
}

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// Borrowed from https://github.com/jeremyBanks/you-can
use ext_php_rs::binary_slice::{BinarySlice, PackSlice};
#[inline(always)]
pub unsafe fn borrow_unchecked<
'original,
'unbounded,
Ref: BorrowUnchecked<'original, 'unbounded>,
>(
reference: Ref,
) -> Ref::Unbounded {
unsafe { BorrowUnchecked::borrow_unchecked(reference) }
}
#[doc(hidden)]
pub unsafe trait BorrowUnchecked<'original, 'unbounded> {
type Unbounded;
unsafe fn borrow_unchecked(self) -> Self::Unbounded;
}
unsafe impl<'original, 'unbounded, T: 'unbounded> BorrowUnchecked<'original, 'unbounded>
for &'original T
{
type Unbounded = &'unbounded T;
#[inline(always)]
unsafe fn borrow_unchecked(self) -> Self::Unbounded {
unsafe { ::core::mem::transmute(self) }
}
}
unsafe impl<'original, 'unbounded, T: 'unbounded> BorrowUnchecked<'original, 'unbounded>
for &'original mut T
{
type Unbounded = &'unbounded mut T;
#[inline(always)]
unsafe fn borrow_unchecked(self) -> Self::Unbounded {
unsafe { ::core::mem::transmute(self) }
}
}
unsafe impl<'original, 'unbounded, T: 'unbounded + PackSlice> BorrowUnchecked<'original, 'unbounded>
for BinarySlice<'original, T>
{
type Unbounded = BinarySlice<'unbounded, T>;
#[inline(always)]
unsafe fn borrow_unchecked(self) -> Self::Unbounded {
unsafe { ::core::mem::transmute(self) }
}
}

130
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use std::cell::RefCell;
use std::fs::File;
use std::future::Future;
use std::io::{self, Write};
use std::os::fd::{RawFd, FromRawFd};
use std::sync::mpsc::{Sender, Receiver, channel};
use std::io::Read;
use crate::borrow_unchecked::borrow_unchecked;
use ext_php_rs::boxed::ZBox;
use ext_php_rs::call_user_func;
use ext_php_rs::prelude::*;
use ext_php_rs::types::ZendHashTable;
use ext_php_rs::zend::Function;
use lazy_static::lazy_static;
use tokio::runtime::Runtime;
use std::os::fd::AsRawFd;
lazy_static! {
pub static ref RUNTIME: Runtime = Runtime::new().expect("Could not allocate runtime");
}
thread_local! {
static EVENTLOOP: RefCell<Option<EventLoop>> = RefCell::new(None);
}
#[cfg(any(target_os = "linux", target_os = "solaris"))]
fn sys_pipe() -> io::Result<(RawFd, RawFd)> {
let mut pipefd = [0; 2];
let ret = unsafe { libc::pipe2(pipefd.as_mut_ptr(), libc::O_CLOEXEC | libc::O_NONBLOCK) };
if ret == -1 {
return Err(io::Error::last_os_error());
}
Ok((pipefd[0], pipefd[1]))
}
pub struct EventLoop {
fibers: ZBox<ZendHashTable>,
sender: Sender<u64>,
receiver: Receiver<u64>,
notify_sender: File,
notify_receiver: File,
get_current_suspension: Function,
dummy: [u8; 1],
}
impl EventLoop {
pub fn init() -> PhpResult<u64> {
EVENTLOOP.with_borrow_mut(|e| {
Ok(
match e {
None => e.insert(Self::new()?),
Some(ev) => ev
}.notify_receiver.as_raw_fd() as u64
)
})
}
pub fn suspend_on<T: Send + 'static, F: Future<Output = T> + Send + 'static>(future: F) -> T {
let (future, get_current_suspension) = EVENTLOOP.with_borrow_mut(move |c| {
let c = c.as_mut().unwrap();
let idx = c.fibers.len() as u64;
c.fibers.insert_at_index(idx, call_user_func!(c.get_current_suspension).unwrap()).unwrap();
let sender = c.sender.clone();
let mut notifier = c.notify_sender.try_clone().unwrap();
(RUNTIME.spawn(async move {
let res = future.await;
sender.send(idx).unwrap();
notifier.write_all(&[0]).unwrap();
res
}), unsafe {
borrow_unchecked(&c.get_current_suspension)
})
});
call_user_func!(get_current_suspension).unwrap().try_call_method("suspend", vec![]).unwrap();
return RUNTIME.block_on(future).unwrap();
}
pub fn wakeup() -> PhpResult<()> {
EVENTLOOP.with_borrow_mut(|c| {
let c = c.as_mut().unwrap();
c.notify_receiver.read_exact(&mut c.dummy).unwrap();
for fiber_id in c.receiver.try_iter() {
if let Some(fiber) = c.fibers.get_index_mut(fiber_id) {
fiber.object_mut().unwrap().try_call_method("resume", vec![])?;
c.fibers.remove_index(fiber_id);
}
}
Ok(())
})
}
pub fn shutdown() {
EVENTLOOP.set(None)
}
pub fn new() -> PhpResult<Self> {
let (sender, receiver) = channel();
let (notify_receiver, notify_sender) =
sys_pipe().map_err(|err| format!("Could not create pipe: {}", err))?;
if !call_user_func!(Function::from_function("class_exists"), "\\Revolt\\EventLoop")?.bool().unwrap_or(false) {
return Err(format!("\\Revolt\\EventLoop does not exist!").into());
}
if !call_user_func!(Function::from_function("interface_exists"), "\\Revolt\\EventLoop\\Suspension")?.bool().unwrap_or(false) {
return Err(format!("\\Revolt\\EventLoop\\Suspension does not exist!").into());
}
Ok(Self {
fibers: ZendHashTable::new(),
sender: sender,
receiver: receiver,
notify_sender: unsafe { File::from_raw_fd(notify_sender) },
notify_receiver: unsafe { File::from_raw_fd(notify_receiver) },
dummy: [0; 1],
get_current_suspension: Function::try_from_method("\\Revolt\\EventLoop", "getSuspension").ok_or("\\Revolt\\EventLoop::getSuspension does not exist")?,
})
}
}

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pub mod borrow_unchecked;
mod event_loop;
pub use php_tokio_derive::php_async_impl;
pub use event_loop::RUNTIME;
pub use event_loop::EventLoop;