shader-compiler-llvm-7/src/backend.rs

   1 // SPDX-License-Identifier: LGPL-2.1-or-later
   2 // Copyright 2018 Jacob Lifshay
   3 use llvm_sys;
   4 use shader_compiler::backend::*;
   5 use std::ffi::CString;
   6 use std::os::raw::c_char;
   7
   8 #[repr(transparent)]
   9 pub struct LLVM7Context(llvm_sys::prelude::LLVMContextRef);
  10
  11 impl Drop for LLVM7Context {
  12     fn drop(&mut self) {
  13         unsafe {
  14             llvm_sys::core::LLVMContextDispose(self.0);
  15         }
  16     }
  17 }
  18
  19 unsafe impl Send for LLVM7Context {}
  20
  21 impl<'a> Context<'a> for LLVM7Context {
  22     type Module = LLVM7Module;
  23     fn create_module(&self, name: &str) -> LLVM7Module {
  24         let name = CString::new(name).unwrap();
  25         unsafe {
  26             LLVM7Module(llvm_sys::core::LLVMModuleCreateWithNameInContext(
  27                 name.as_ptr(),
  28                 self.0,
  29             ))
  30         }
  31     }
  32 }
  33
  34 #[repr(transparent)]
  35 pub struct LLVM7Module(llvm_sys::prelude::LLVMModuleRef);
  36
  37 impl Drop for LLVM7Module {
  38     fn drop(&mut self) {
  39         unsafe {
  40             llvm_sys::core::LLVMDisposeModule(self.0);
  41         }
  42     }
  43 }
  44
  45 impl<'a> Module<'a> for LLVM7Module {
  46     fn set_source_file_name(&mut self, source_file_name: &str) {
  47         unsafe {
  48             llvm_sys::core::LLVMSetSourceFileName(
  49                 self.0,
  50                 source_file_name.as_ptr() as *const c_char,
  51                 source_file_name.len(),
  52             )
  53         }
  54     }
  55 }
  56
  57 pub struct LLVM7ShaderCompiler;
  58
  59 impl ShaderCompiler for LLVM7ShaderCompiler {
  60     fn name() -> &'static str {
  61         "LLVM 7"
  62     }
  63     fn run_with_user<SCU: ShaderCompilerUser>(shader_compiler_user: SCU) -> SCU::ReturnType {
  64         let context = unsafe { LLVM7Context(llvm_sys::core::LLVMContextCreate()) };
  65         shader_compiler_user.run_with_context(&context)
  66     }
  67 }