| // Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #ifndef RUNTIME_VM_COMPILER_FFI_NATIVE_CALLING_CONVENTION_H_ |
| #define RUNTIME_VM_COMPILER_FFI_NATIVE_CALLING_CONVENTION_H_ |
| |
| #if defined(DART_PRECOMPILED_RUNTIME) |
| #error "AOT runtime should not use compiler sources (including header files)" |
| #endif // defined(DART_PRECOMPILED_RUNTIME) |
| |
| #include <platform/globals.h> |
| |
| #include "vm/compiler/backend/locations.h" |
| #include "vm/compiler/ffi/native_location.h" |
| #include "vm/compiler/ffi/native_type.h" |
| |
| namespace dart { |
| |
| namespace compiler { |
| |
| namespace ffi { |
| |
| using NativeLocations = ZoneGrowableArray<const NativeLocation*>; |
| |
| |
| // Values below 0 index result (result might be multiple if composite). |
| const intptr_t kResultIndex = -1; |
| |
| // Calculates native calling convention, is not aware of Dart calling |
| // convention constraints. |
| // |
| // This class is meant to be extended or embedded in a class that is aware |
| // of Dart calling convention constraints. |
| class NativeCallingConvention : public ZoneAllocated { |
| public: |
| NativeCallingConvention(Zone* zone, const Function& c_signature); |
| |
| // Excluding the #0 argument which is the function pointer. |
| intptr_t num_args() const; |
| |
| // The C Type (expressed in a Dart Type) of the argument at `arg_index`. |
| // |
| // Excluding the #0 argument which is the function pointer. |
| AbstractTypePtr CType(intptr_t arg_index) const; |
| |
| // The location of the argument at `arg_index`. |
| const NativeLocation& Location(intptr_t arg_index) const { |
| if (arg_index == kResultIndex) { |
| return result_loc_; |
| } |
| return *arg_locs_.At(arg_index); |
| } |
| |
| intptr_t StackTopInBytes() const; |
| |
| protected: |
| Zone* const zone_; |
| // Contains the function pointer as argument #0. |
| const Function& c_signature_; |
| const NativeLocations& arg_locs_; |
| const NativeLocation& result_loc_; |
| }; |
| |
| } // namespace ffi |
| |
| } // namespace compiler |
| |
| } // namespace dart |
| |
| #endif // RUNTIME_VM_COMPILER_FFI_NATIVE_CALLING_CONVENTION_H_ |