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c_no_std binding to show use in C freestanding environments. (#238)

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Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>
This commit is contained in:
Anand Krishnamoorthi
2024-05-17 21:31:11 -04:00
committed by GitHub
parent 5422bde391
commit 67f65c0561
12 changed files with 202 additions and 13 deletions
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bindings/ffi/src/lib.rs
+32 -1
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@@ -127,7 +127,6 @@ pub extern "C" fn regorus_engine_drop(engine: *mut RegorusEngine) {
///
/// * `path`: A filename to be associated with the policy.
/// * `rego`: Rego policy.
#[no_mangle]
pub extern "C" fn regorus_engine_add_policy(
engine: *mut RegorusEngine,
@@ -141,6 +140,7 @@ pub extern "C" fn regorus_engine_add_policy(
}())
}
#[cfg(feature = "std")]
#[no_mangle]
pub extern "C" fn regorus_engine_add_policy_from_file(
engine: *mut RegorusEngine,
@@ -169,6 +169,7 @@ pub extern "C" fn regorus_engine_add_data_json(
}())
}
#[cfg(feature = "std")]
#[no_mangle]
pub extern "C" fn regorus_engine_add_data_from_json_file(
engine: *mut RegorusEngine,
@@ -209,6 +210,7 @@ pub extern "C" fn regorus_engine_set_input_json(
}())
}
#[cfg(feature = "std")]
#[no_mangle]
pub extern "C" fn regorus_engine_set_input_from_json_file(
engine: *mut RegorusEngine,
@@ -246,3 +248,32 @@ pub extern "C" fn regorus_engine_eval_query(
Err(e) => to_regorus_result(Err(e)),
}
}
#[cfg(feature = "custom_allocator")]
extern "C" {
fn regorus_aligned_alloc(alignment: usize, size: usize) -> *mut u8;
fn regorus_free(ptr: *mut u8);
}
#[cfg(feature = "custom_allocator")]
mod allocator {
use std::alloc::{GlobalAlloc, Layout};
struct RegorusAllocator {}
unsafe impl GlobalAlloc for RegorusAllocator {
unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
let size = layout.size();
let align = layout.align();
crate::regorus_aligned_alloc(align, size)
}
unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) {
crate::regorus_free(ptr)
}
}
#[global_allocator]
static ALLOCATOR: RegorusAllocator = RegorusAllocator {};
}