have no-stdlib be the optional feature rather than asking people to turn on the stdlib

Author: danielrh

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "alloc-no-stdlib"
 description = "A dynamic allocator that may be used with or without the stdlib. This allows a package with nostd to allocate memory dynamically and be used either with a custom allocator, items on the stack, or by a package that wishes to simply use Box<>. It also provides options to use calloc or a mutable global variable for pre-zeroed memory"
-version = "1.1.0"
+version = "1.2.0"
 authors = ["Daniel Reiter Horn <[email protected]>"]
 documentation = "https://raw.githubusercontent.com/dropbox/rust-alloc-no-stdlib/master/tests/lib.rs"
 homepage = "https://github.com/dropbox/rust-alloc-no-stdlib"
@@ -15,4 +15,4 @@ name = "example"
 
 [features]
 unsafe = []
-stdlib = []
+no-stdlib = []

src/bin/example.rs

@@ -6,7 +6,7 @@ use core::ops;
 mod heap_alloc;
 
 pub use heap_alloc::HeapAllocator;
-#[cfg(feature="stdlib")]
+#[cfg(not(feature="no-stdlib"))]
 use alloc_no_stdlib::HeapPrealloc;
 mod tests;
 extern {
@@ -27,11 +27,11 @@ use alloc_no_stdlib::StackAllocator;
 use alloc_no_stdlib::bzero;
 declare_stack_allocator_struct!(CallocAllocatedFreelist4, 4, calloc);
 declare_stack_allocator_struct!(StackAllocatedFreelist16, 16, stack);
-#[cfg(not(feature="stdlib"))]
+#[cfg(feature="no-stdlib")]
 fn show_heap_prealloc() {
 
 }
-#[cfg(feature="stdlib")]
+#[cfg(not(feature="no-stdlib"))]
 fn show_heap_prealloc() {
   let mut zero_global_buffer = define_allocator_memory_pool!(4, u8, [0; 1024 * 1024 * 20], heap);
 

src/heap_alloc.rs

@@ -1,4 +1,4 @@
-#![cfg(feature="stdlib")]
+#![cfg(not(feature="no-stdlib"))]
 use std;
 
 

src/lib.rs

@@ -1,6 +1,6 @@
 #![no_std]
 
-#[cfg(feature="stdlib")]
+#[cfg(not(feature="no-stdlib"))]
 #[macro_use]
 extern crate std;
 mod allocated_memory;
@@ -16,14 +16,12 @@ pub use allocated_stack_memory::AllocatedStackMemory;
 pub use stack_allocator::Allocator;
 pub use stack_allocator::StackAllocator;
 mod heap_alloc;
-#[cfg(feature="stdlib")]
+#[cfg(not(feature="no-stdlib"))]
 pub use heap_alloc::HeapAlloc;
-#[cfg(feature="stdlib")]
+#[cfg(not(feature="no-stdlib"))]
 pub use heap_alloc::HeapPrealloc;
-#[cfg(all(feature="stdlib", feature="unsafe"))]
+#[cfg(all(not(feature="no-stdlib"), feature="unsafe"))]
 pub use heap_alloc::HeapAllocUninitialized;
-//#[cfg(all(feature="stdlib", feature="unsafe"))]
-//pub use heap_alloc::StdAllocUninitialized;
 use core::default::Default;
 pub fn bzero<T : Default> (data : &mut [T]) {
     for iter in data.iter_mut() {

tests/lib.rs

@@ -12,10 +12,10 @@ use core::ops;
 use alloc_no_stdlib::{Allocator, SliceWrapperMut, SliceWrapper,
             StackAllocator, AllocatedStackMemory, uninitialized, bzero};
 
-#[cfg(feature="stdlib")]
+#[cfg(not(feature="no-stdlib"))]
 use alloc_no_stdlib::{HeapPrealloc, HeapAlloc};
 
-#[cfg(all(feature="stdlib", feature="unsafe"))]
+#[cfg(all(not(feature="no-stdlib"),feature="unsafe"))]
 use alloc_no_stdlib::{HeapAllocUninitialized};
 
 declare_stack_allocator_struct!(CallocAllocatedFreelist4096, 4096, calloc);
@@ -136,7 +136,7 @@ fn uninitialized_stack_pool_free_null() {
 
 }
 #[test]
-#[cfg(all(feature="stdlib",feature="unsafe"))]
+#[cfg(all(feature="unsafe",not(feature="no-stdlib")))]
 fn uninitialized_heap_pool_test() {
   {
   let mut heap_global_buffer = unsafe{HeapPrealloc::<u8>::new_uninitialized_memory_pool(6 * 1024 * 1024)};
@@ -335,7 +335,7 @@ fn stack_pool_free_null() {
 
 }
 #[test]
-#[cfg(feature="stdlib")]
+#[cfg(not(feature="no-stdlib"))]
 fn heap_pool_test() {
   {
   let mut heap_global_buffer = define_allocator_memory_pool!(4096, u8, [0; 6 * 1024 * 1024], heap);