dawn-cmake/generator/templates/dawn/wire/client/ApiProcs.cpp

178 lines
6.5 KiB
C++

//* Copyright 2019 The Dawn Authors
//*
//* Licensed under the Apache License, Version 2.0 (the "License");
//* you may not use this file except in compliance with the License.
//* You may obtain a copy of the License at
//*
//* http://www.apache.org/licenses/LICENSE-2.0
//*
//* Unless required by applicable law or agreed to in writing, software
//* distributed under the License is distributed on an "AS IS" BASIS,
//* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//* See the License for the specific language governing permissions and
//* limitations under the License.
#include "dawn/wire/client/ApiObjects.h"
#include "dawn/wire/client/Client.h"
#include <algorithm>
#include <cstring>
#include <string>
#include <vector>
namespace dawn::wire::client {
//* Outputs an rvalue that's the number of elements a pointer member points to.
{% macro member_length(member, accessor) -%}
{%- if member.length == "constant" -%}
{{member.constant_length}}
{%- else -%}
{{accessor}}{{as_varName(member.length.name)}}
{%- endif -%}
{%- endmacro %}
//* Implementation of the client API functions.
{% for type in by_category["object"] %}
{% set Type = type.name.CamelCase() %}
{% set cType = as_cType(type.name) %}
{% for method in type.methods %}
{% set Suffix = as_MethodSuffix(type.name, method.name) %}
{% if Suffix in client_handwritten_commands %}
static
{% endif %}
{{as_cType(method.return_type.name)}} Client{{Suffix}}(
{{-cType}} cSelf
{%- for arg in method.arguments -%}
, {{as_annotated_cType(arg)}}
{%- endfor -%}
) {
auto self = reinterpret_cast<{{as_wireType(type)}}>(cSelf);
{% if Suffix not in client_handwritten_commands %}
{{Suffix}}Cmd cmd;
//* Create the structure going on the wire on the stack and fill it with the value
//* arguments so it can compute its size.
cmd.self = cSelf;
//* For object creation, store the object ID the client will use for the result.
{% if method.return_type.category == "object" %}
auto* returnObject = self->GetClient()->Make<{{method.return_type.name.CamelCase()}}>();
cmd.result = returnObject->GetWireHandle();
{% endif %}
{% for arg in method.arguments %}
//* Commands with mutable pointers should not be autogenerated.
{{assert(arg.annotation != "*")}}
cmd.{{as_varName(arg.name)}} = {{as_varName(arg.name)}};
{% endfor %}
//* Allocate space to send the command and copy the value args over.
self->GetClient()->SerializeCommand(cmd);
{% if method.return_type.category == "object" %}
return ToAPI(returnObject);
{% endif %}
{% else %}
return self->{{method.name.CamelCase()}}(
{%- for arg in method.arguments -%}
{%if not loop.first %}, {% endif %} {{as_varName(arg.name)}}
{%- endfor -%});
{% endif %}
}
{% endfor %}
//* When an object's refcount reaches 0, notify the server side of it and delete it.
void Client{{as_MethodSuffix(type.name, Name("release"))}}({{cType}} cObj) {
{{Type}}* obj = reinterpret_cast<{{Type}}*>(cObj);
if (!obj->Release()) {
return;
}
DestroyObjectCmd cmd;
cmd.objectType = ObjectType::{{type.name.CamelCase()}};
cmd.objectId = obj->GetWireId();
Client* client = obj->GetClient();
client->SerializeCommand(cmd);
client->Free(obj);
}
void Client{{as_MethodSuffix(type.name, Name("reference"))}}({{cType}} cObj) {
reinterpret_cast<{{Type}}*>(cObj)->Reference();
}
{% endfor %}
namespace {
WGPUInstance ClientCreateInstance(WGPUInstanceDescriptor const* descriptor) {
UNREACHABLE();
return nullptr;
}
struct ProcEntry {
WGPUProc proc;
const char* name;
};
static const ProcEntry sProcMap[] = {
{% for (type, method) in c_methods_sorted_by_name %}
{ reinterpret_cast<WGPUProc>(Client{{as_MethodSuffix(type.name, method.name)}}), "{{as_cMethod(type.name, method.name)}}" },
{% endfor %}
};
static constexpr size_t sProcMapSize = sizeof(sProcMap) / sizeof(sProcMap[0]);
} // anonymous namespace
WGPUProc ClientGetProcAddress(WGPUDevice, const char* procName) {
if (procName == nullptr) {
return nullptr;
}
const ProcEntry* entry = std::lower_bound(&sProcMap[0], &sProcMap[sProcMapSize], procName,
[](const ProcEntry &a, const char *b) -> bool {
return strcmp(a.name, b) < 0;
}
);
if (entry != &sProcMap[sProcMapSize] && strcmp(entry->name, procName) == 0) {
return entry->proc;
}
// Special case the two free-standing functions of the API.
if (strcmp(procName, "wgpuGetProcAddress") == 0) {
return reinterpret_cast<WGPUProc>(ClientGetProcAddress);
}
if (strcmp(procName, "wgpuCreateInstance") == 0) {
return reinterpret_cast<WGPUProc>(ClientCreateInstance);
}
return nullptr;
}
std::vector<const char*> GetProcMapNamesForTesting() {
std::vector<const char*> result;
result.reserve(sProcMapSize);
for (const ProcEntry& entry : sProcMap) {
result.push_back(entry.name);
}
return result;
}
{% set Prefix = metadata.proc_table_prefix %}
static {{Prefix}}ProcTable gProcTable = {
{% for function in by_category["function"] %}
Client{{as_cppType(function.name)}},
{% endfor %}
{% for type in by_category["object"] %}
{% for method in c_methods(type) %}
Client{{as_MethodSuffix(type.name, method.name)}},
{% endfor %}
{% endfor %}
};
const {{Prefix}}ProcTable& GetProcs() {
return gProcTable;
}
} // namespace dawn::wire::client