1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312
#![forbid(unsafe_code, future_incompatible, rust_2018_idioms)]
#![deny(missing_debug_implementations, nonstandard_style)]
#![recursion_limit = "512"]
mod tokio;
use proc_macro::TokenStream;
use quote::{quote, quote_spanned};
use syn::spanned::Spanned;
/// Enables an async main function that uses the async-std runtime.
///
/// # Examples
///
/// ```ignore
/// #[pyo3_asyncio::async_std::main]
/// async fn main() -> PyResult<()> {
/// Ok(())
/// }
/// ```
#[cfg(not(test))] // NOTE: exporting main breaks tests, we should file an issue.
#[proc_macro_attribute]
pub fn async_std_main(_attr: TokenStream, item: TokenStream) -> TokenStream {
let input = syn::parse_macro_input!(item as syn::ItemFn);
let ret = &input.sig.output;
let inputs = &input.sig.inputs;
let name = &input.sig.ident;
let body = &input.block;
let attrs = &input.attrs;
let vis = &input.vis;
if name != "main" {
return TokenStream::from(quote_spanned! { name.span() =>
compile_error!("only the main function can be tagged with #[async_std::main]"),
});
}
if input.sig.asyncness.is_none() {
return TokenStream::from(quote_spanned! { input.span() =>
compile_error!("the async keyword is missing from the function declaration"),
});
}
let result = quote! {
#vis fn main() {
#(#attrs)*
async fn main(#inputs) #ret {
#body
}
pyo3::prepare_freethreaded_python();
pyo3::Python::with_gil(|py| {
pyo3_asyncio::async_std::run(py, main())
.map_err(|e| {
e.print_and_set_sys_last_vars(py);
})
.unwrap();
});
}
};
result.into()
}
/// Enables an async main function that uses the tokio runtime.
///
/// # Arguments
/// * `flavor` - selects the type of tokio runtime ["multi_thread", "current_thread"]
/// * `worker_threads` - number of worker threads, defaults to the number of CPUs on the system
///
/// # Examples
///
/// Default configuration:
/// ```ignore
/// #[pyo3_asyncio::tokio::main]
/// async fn main() -> PyResult<()> {
/// Ok(())
/// }
/// ```
///
/// Current-thread scheduler:
/// ```ignore
/// #[pyo3_asyncio::tokio::main(flavor = "current_thread")]
/// async fn main() -> PyResult<()> {
/// Ok(())
/// }
/// ```
///
/// Multi-thread scheduler with custom worker thread count:
/// ```ignore
/// #[pyo3_asyncio::tokio::main(flavor = "multi_thread", worker_threads = 10)]
/// async fn main() -> PyResult<()> {
/// Ok(())
/// }
/// ```
#[cfg(not(test))] // NOTE: exporting main breaks tests, we should file an issue.
#[proc_macro_attribute]
pub fn tokio_main(args: TokenStream, item: TokenStream) -> TokenStream {
tokio::main(args, item, true)
}
/// Registers an `async-std` test with the `pyo3-asyncio` test harness.
///
/// This attribute is meant to mirror the `#[test]` attribute and allow you to mark a function for
/// testing within an integration test. Like the `#[async_std::test]` attribute, it will accept
/// `async` test functions, but it will also accept blocking functions as well.
///
/// # Examples
/// ```ignore
/// use std::{time::Duration, thread};
///
/// use pyo3::prelude::*;
///
/// // async test function
/// #[pyo3_asyncio::async_std::test]
/// async fn test_async_sleep() -> PyResult<()> {
/// async_std::task::sleep(Duration::from_secs(1)).await;
/// Ok(())
/// }
///
/// // blocking test function
/// #[pyo3_asyncio::async_std::test]
/// fn test_blocking_sleep() -> PyResult<()> {
/// thread::sleep(Duration::from_secs(1));
/// Ok(())
/// }
///
/// // blocking test functions can optionally accept an event_loop parameter
/// #[pyo3_asyncio::async_std::test]
/// fn test_blocking_sleep_with_event_loop(event_loop: PyObject) -> PyResult<()> {
/// thread::sleep(Duration::from_secs(1));
/// Ok(())
/// }
/// ```
#[cfg(not(test))] // NOTE: exporting main breaks tests, we should file an issue.
#[proc_macro_attribute]
pub fn async_std_test(_attr: TokenStream, item: TokenStream) -> TokenStream {
let input = syn::parse_macro_input!(item as syn::ItemFn);
let sig = &input.sig;
let name = &input.sig.ident;
let body = &input.block;
let vis = &input.vis;
let fn_impl = if input.sig.asyncness.is_none() {
// Optionally pass an event_loop parameter to blocking tasks
let task = if sig.inputs.is_empty() {
quote! {
Box::pin(pyo3_asyncio::async_std::re_exports::spawn_blocking(move || {
#name()
}))
}
} else {
quote! {
let event_loop = Python::with_gil(|py| {
pyo3_asyncio::async_std::get_current_loop(py).unwrap().into()
});
Box::pin(pyo3_asyncio::async_std::re_exports::spawn_blocking(move || {
#name(event_loop)
}))
}
};
quote! {
#vis fn #name() -> std::pin::Pin<Box<dyn std::future::Future<Output = pyo3::PyResult<()>> + Send>> {
#sig {
#body
}
#task
}
}
} else {
quote! {
#vis fn #name() -> std::pin::Pin<Box<dyn std::future::Future<Output = pyo3::PyResult<()>> + Send>> {
#sig {
#body
}
Box::pin(#name())
}
}
};
let result = quote! {
#fn_impl
pyo3_asyncio::inventory::submit! {
#![crate = pyo3_asyncio] {
pyo3_asyncio::testing::Test {
name: format!("{}::{}", std::module_path!(), stringify!(#name)),
test_fn: &#name
}
}
}
};
result.into()
}
/// Registers a `tokio` test with the `pyo3-asyncio` test harness.
///
/// This attribute is meant to mirror the `#[test]` attribute and allow you to mark a function for
/// testing within an integration test. Like the `#[tokio::test]` attribute, it will accept `async`
/// test functions, but it will also accept blocking functions as well.
///
/// # Examples
/// ```ignore
/// use std::{time::Duration, thread};
///
/// use pyo3::prelude::*;
///
/// // async test function
/// #[pyo3_asyncio::tokio::test]
/// async fn test_async_sleep() -> PyResult<()> {
/// tokio::time::sleep(Duration::from_secs(1)).await;
/// Ok(())
/// }
///
/// // blocking test function
/// #[pyo3_asyncio::tokio::test]
/// fn test_blocking_sleep() -> PyResult<()> {
/// thread::sleep(Duration::from_secs(1));
/// Ok(())
/// }
///
/// // blocking test functions can optionally accept an event_loop parameter
/// #[pyo3_asyncio::tokio::test]
/// fn test_blocking_sleep_with_event_loop(event_loop: PyObject) -> PyResult<()> {
/// thread::sleep(Duration::from_secs(1));
/// Ok(())
/// }
/// ```
#[cfg(not(test))] // NOTE: exporting main breaks tests, we should file an issue.
#[proc_macro_attribute]
pub fn tokio_test(_attr: TokenStream, item: TokenStream) -> TokenStream {
let input = syn::parse_macro_input!(item as syn::ItemFn);
let sig = &input.sig;
let name = &input.sig.ident;
let body = &input.block;
let vis = &input.vis;
let fn_impl = if input.sig.asyncness.is_none() {
// Optionally pass an event_loop parameter to blocking tasks
let task = if sig.inputs.is_empty() {
quote! {
Box::pin(async move {
match pyo3_asyncio::tokio::get_runtime().spawn_blocking(move || #name()).await {
Ok(result) => result,
Err(e) => {
assert!(e.is_panic());
Err(pyo3::exceptions::PyException::new_err("rust future panicked"))
}
}
})
}
} else {
quote! {
let event_loop = Python::with_gil(|py| {
pyo3_asyncio::tokio::get_current_loop(py).unwrap().into()
});
Box::pin(async move {
match pyo3_asyncio::tokio::get_runtime().spawn_blocking(move || #name(event_loop)).await {
Ok(result) => result,
Err(e) => {
assert!(e.is_panic());
Err(pyo3::exceptions::PyException::new_err("rust future panicked"))
}
}
})
}
};
quote! {
#vis fn #name() -> std::pin::Pin<Box<dyn std::future::Future<Output = pyo3::PyResult<()>> + Send>> {
#sig {
#body
}
#task
}
}
} else {
quote! {
#vis fn #name() -> std::pin::Pin<Box<dyn std::future::Future<Output = pyo3::PyResult<()>> + Send>> {
#sig {
#body
}
Box::pin(#name())
}
}
};
let result = quote! {
#fn_impl
pyo3_asyncio::inventory::submit! {
#![crate = pyo3_asyncio] {
pyo3_asyncio::testing::Test {
name: format!("{}::{}", std::module_path!(), stringify!(#name)),
test_fn: &#name
}
}
}
};
result.into()
}