gnu_libjit/
context.rs

1use std::num::TryFromIntError;
2use std::os::raw::c_uint;
3use gnu_libjit_sys::{jit_context_build_end, jit_context_build_start, jit_type_ulong, jit_context_create, jit_context_t, jit_type_long, jit_function_create, jit_type_create_signature, jit_type_float32, jit_type_float64, jit_type_int, jit_type_t, jit_abi_t, jit_type_sbyte, jit_type_ubyte, jit_type_void_ptr};
4use crate::{Abi, Function, JitType};
5
6pub struct Context {
7    context: jit_context_t,
8}
9
10#[derive(Clone, Debug)]
11pub enum Exception {
12    TooManyParams(TryFromIntError),
13    ParamIndexToLarge(TryFromIntError),
14    ArgIndexTooLarge(String),
15}
16
17impl Context {
18    pub fn new() -> Context {
19        unsafe {
20            Context { context: jit_context_create() }
21        }
22    }
23
24    pub fn build_start(&self) {
25        unsafe {
26            jit_context_build_start(self.context);
27        }
28    }
29    pub fn build_end(&self) {
30        unsafe {
31            jit_context_build_end(self.context);
32        }
33    }
34
35    // Adds a new function to the context
36    // TODO: This could fail on systems with non-32bit unsigned ints
37    /// let mut context = Context::new();
38    /// let params = vec![JitType::Int]
39    /// let function = context.function(Abi::Cdecl, JitType::Int, params.as_slice());
40    pub fn function(&mut self, abi: Abi, return_type: JitType, params: Vec<JitType>) -> Result<Function, Exception> {
41        let mut params_libjit: Vec<jit_type_t> = params.iter().map(|p| p.inner).collect();
42
43        unsafe {
44            let signature = jit_type_create_signature(
45                abi as jit_abi_t,
46                return_type.inner,
47                params_libjit.as_mut_ptr(),
48                params.len() as c_uint,
49                1,
50            );
51            let function = Function::new(jit_function_create(self.context, signature),  signature, params);
52            Ok(function)
53        }
54    }
55
56    pub fn int_type() -> JitType {
57        unsafe { JitType::new(jit_type_int) }
58    }
59    pub fn long_type() -> JitType {
60        unsafe { JitType::new(jit_type_long) }
61    }
62    pub fn ulong_type() -> JitType {
63        unsafe { JitType::new(jit_type_ulong) }
64    }
65    pub fn float32_type() -> JitType {
66        unsafe { JitType::new(jit_type_float32) }
67    }
68    pub fn float64_type() -> JitType { unsafe { JitType::new(jit_type_float64) } }
69    pub fn sbyte_type() -> JitType { unsafe { JitType::new(jit_type_sbyte) } }
70    pub fn ubyte_type() -> JitType { unsafe { JitType::new(jit_type_ubyte) } }
71    pub fn void_ptr_type() -> JitType { unsafe { JitType::new(jit_type_void_ptr) } }
72}
gnu_libjit/context.rs

gnu_libjit/
context.rs
