mirror of
https://github.com/bspeice/qadapt
synced 2024-11-14 01:58:10 -05:00
Remove no_run
from doctests
Uses `qadapt::is_active` to work around rust-lang/cargo#6570. Currently assumes that *some* allocation will have happened by the time `fn main()` is called, which is sub-par.
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32
src/lib.rs
32
src/lib.rs
@ -17,23 +17,27 @@
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//! Actually making use of QADAPT is straight-forward. To set up the allocator,
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//! place the following snippet in either your program binaries (main.rs) or tests:
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//!
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//! ```rust,no_run
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//! ```rust
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//! use qadapt::QADAPT;
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//!
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//! #[global_allocator]
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//! static Q: QADAPT = QADAPT;
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//!
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//! fn main() {
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//! # // Because `debug_assertions` are on for doctests in release mode
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//! # // we have to add an extra guard.
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//! # if qadapt::is_active() {
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//! if cfg!(debug_assertions) {
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//! assert!(qadapt::is_active());
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//! }
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//! # }
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//! }
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//! ```
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//!
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//! After that, there are two ways of telling QADAPT that it should trigger a panic:
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//!
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//! 1. Annotate functions with the `#[no_alloc]` proc macro:
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//! ```rust,no_run
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//! ```rust
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//! use qadapt::no_alloc;
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//! use qadapt::QADAPT;
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//! use std::panic::catch_unwind;
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@ -57,7 +61,9 @@
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//! do_math();
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//!
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//! let err = catch_unwind(|| does_panic());
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//! # if qadapt::is_active() {
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//! assert!(err.is_err());
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//! # }
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//! }
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//! ```
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//!
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@ -96,22 +102,27 @@ use std::thread;
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thread_local! {
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static PROTECTION_LEVEL: RwLock<usize> = RwLock::new(0);
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}
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static IS_ACTIVE: RwLock<bool> = RwLock::new(false);
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static INTERNAL_ALLOCATION: RwLock<usize> = RwLock::new(usize::max_value());
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/// The QADAPT allocator itself
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///
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/// To make use of the allocator, include this code block in your program
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/// binaries/tests:
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///
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/// ```rust,no_run
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/// ```rust
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/// use qadapt::QADAPT;
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///
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/// #[global_allocator]
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/// static Q: QADAPT = QADAPT;
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///
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/// fn main() {
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/// # if qadapt::is_active() {
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/// if cfg!(debug_assertions) {
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/// assert!(qadapt::is_active());
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/// }
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/// # }
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/// }
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/// ```
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pub struct QADAPT;
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@ -228,7 +239,7 @@ pub fn exit_protected() {
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/// in code that was not intended to be allocation-free. The compiler will warn you
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/// that there is an unreachable statement if this happens.
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///
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/// ```rust,no_run
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/// ```rust
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/// use qadapt::assert_no_alloc;
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/// use qadapt::QADAPT;
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/// use std::panic::catch_unwind;
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@ -247,8 +258,10 @@ pub fn exit_protected() {
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/// // QADAPT allocation guards, this triggers a panic:
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/// // `Box::new` forces an allocation, and QADAPT still thinks
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/// // we're in a protected region because of the return in `early_return()`
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/// # if qadapt::is_active() {
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/// let res = catch_unwind(|| Box::new(x));
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/// assert!(res.is_err());
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/// # }
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/// }
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#[macro_export]
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macro_rules! assert_no_alloc {
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@ -260,16 +273,13 @@ macro_rules! assert_no_alloc {
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}};
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}
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static IS_ACTIVE: RwLock<bool> = RwLock::new(false);
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static INTERNAL_ALLOCATION: RwLock<usize> = RwLock::new(usize::max_value());
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/// Get the current "protection level" in QADAPT: calls to `enter_protected() - exit_protected()`.
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///
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/// **Note**: For release builds, `protection_level()` will always return 0.
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///
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/// **Example**:
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///
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/// ```rust,no_run
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/// ```rust
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/// use qadapt::enter_protected;
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/// use qadapt::exit_protected;
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/// use qadapt::QADAPT;
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@ -279,6 +289,7 @@ static INTERNAL_ALLOCATION: RwLock<usize> = RwLock::new(usize::max_value());
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/// static Q: QADAPT = QADAPT;
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///
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/// fn main() {
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/// # if qadapt::is_active() {
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/// enter_protected();
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/// // We're now in an allocation-protected code region
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/// assert_eq!(1, protection_level());
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@ -288,6 +299,7 @@ static INTERNAL_ALLOCATION: RwLock<usize> = RwLock::new(usize::max_value());
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/// assert_eq!(2, protection_level());
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/// exit_protected();
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/// exit_protected();
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/// # }
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///
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/// // It's now safe to allocate/drop
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/// }
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@ -302,7 +314,7 @@ pub fn protection_level() -> usize {
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///
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/// **Example**:
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///
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/// ```rust,no_run
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/// ```rust
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/// use qadapt::is_active;
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/// use qadapt::QADAPT;
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///
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@ -310,9 +322,11 @@ pub fn protection_level() -> usize {
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/// static Q: QADAPT = QADAPT;
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///
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/// pub fn main() {
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/// # if qadapt::is_active() {
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/// if cfg!(debug_assertions) {
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/// assert!(is_active());
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/// }
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/// # }
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/// }
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/// ```
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pub fn is_active() -> bool {
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