| //* Copyright 2019 The Dawn & Tint Authors |
| //* |
| //* Redistribution and use in source and binary forms, with or without |
| //* modification, are permitted provided that the following conditions are met: |
| //* |
| //* 1. Redistributions of source code must retain the above copyright notice, this |
| //* list of conditions and the following disclaimer. |
| //* |
| //* 2. Redistributions in binary form must reproduce the above copyright notice, |
| //* this list of conditions and the following disclaimer in the documentation |
| //* and/or other materials provided with the distribution. |
| //* |
| //* 3. Neither the name of the copyright holder nor the names of its |
| //* contributors may be used to endorse or promote products derived from |
| //* this software without specific prior written permission. |
| //* |
| //* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| //* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| //* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| //* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| //* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| //* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| //* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| //* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| //* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| //* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "dawn/common/Assert.h" |
| #include "dawn/wire/server/Server.h" |
| |
| namespace dawn::wire::server { |
| {% for command in cmd_records["command"] %} |
| {% set method = command.derived_method %} |
| {% set is_method = method != None %} |
| {% set returns = is_method and method.return_type.name.canonical_case() != "void" %} |
| |
| {% set Suffix = command.name.CamelCase() %} |
| //* The generic command handlers |
| WireResult Server::Handle{{Suffix}}(DeserializeBuffer* deserializeBuffer) { |
| {{Suffix}}Cmd cmd; |
| WIRE_TRY(cmd.Deserialize(deserializeBuffer, &mAllocator |
| {%- if command.may_have_dawn_object -%} |
| , *this |
| {%- endif -%} |
| )); |
| {% if Suffix in server_custom_pre_handler_commands %} |
| WIRE_TRY(PreHandle{{Suffix}}(cmd)); |
| {%- endif -%} |
| |
| //* Allocate any result objects |
| {% for member in command.members if member.is_return_value -%} |
| {{ assert(member.handle_type) }} |
| {% set cType = as_cType(member.handle_type.name) %} |
| {% set name = as_varName(member.name) %} |
| Reserved<{{cType}}> {{name}}Data; |
| WIRE_TRY(Objects<{{cType}}>().Allocate(&{{name}}Data, cmd.{{name}})); |
| {{name}}Data->generation = cmd.{{name}}.generation; |
| {%- endfor %} |
| |
| //* Get any input objects |
| {% for member in command.members if member.id_type != None -%} |
| {% set cType = as_cType(member.id_type.name) %} |
| {% set name = as_varName(member.name) %} |
| Known<{{cType}}> {{name}}Handle; |
| WIRE_TRY(Objects<{{cType}}>().Get(cmd.{{name}}, &{{name}}Handle)); |
| {% endfor %} |
| |
| //* Do command |
| WIRE_TRY(Do{{Suffix}}( |
| {%- for member in command.members -%} |
| {%- if member.is_return_value -%} |
| {%- if member.handle_type -%} |
| &{{as_varName(member.name)}}Data->handle //* Pass the handle of the output object to be written by the doer |
| {%- else -%} |
| &cmd.{{as_varName(member.name)}} |
| {%- endif -%} |
| {%- elif member.id_type != None -%} |
| {{as_varName(member.name)}}Handle |
| {%- else -%} |
| cmd.{{as_varName(member.name)}} |
| {%- endif -%} |
| {%- if not loop.last -%}, {% endif %} |
| {%- endfor -%} |
| )); |
| |
| return WireResult::Success; |
| } |
| {% endfor %} |
| |
| const volatile char* Server::HandleCommandsImpl(const volatile char* commands, size_t size) { |
| DeserializeBuffer deserializeBuffer(commands, size); |
| |
| while (deserializeBuffer.AvailableSize() >= sizeof(CmdHeader) + sizeof(WireCmd)) { |
| // Start by chunked command handling, if it is done, then it means the whole buffer |
| // was consumed by it, so we return a pointer to the end of the commands. |
| switch (HandleChunkedCommands(deserializeBuffer.Buffer(), deserializeBuffer.AvailableSize())) { |
| case ChunkedCommandsResult::Consumed: |
| return commands + size; |
| case ChunkedCommandsResult::Error: |
| return nullptr; |
| case ChunkedCommandsResult::Passthrough: |
| break; |
| } |
| |
| WireCmd cmdId = *static_cast<const volatile WireCmd*>(static_cast<const volatile void*>( |
| deserializeBuffer.Buffer() + sizeof(CmdHeader))); |
| WireResult result; |
| switch (cmdId) { |
| {% for command in cmd_records["command"] %} |
| case WireCmd::{{command.name.CamelCase()}}: |
| result = Handle{{command.name.CamelCase()}}(&deserializeBuffer); |
| break; |
| {% endfor %} |
| default: |
| result = WireResult::FatalError; |
| } |
| |
| if (result != WireResult::Success) { |
| return nullptr; |
| } |
| mAllocator.Reset(); |
| } |
| |
| // After the server handles all the commands from the stream, we additionally run |
| // ProcessEvents on all known Instances so that any work done on the server side can be |
| // forwarded through to the client. |
| for (auto instance : Objects<WGPUInstance>().GetAllHandles()) { |
| if (DoInstanceProcessEvents(instance) != WireResult::Success) { |
| return nullptr; |
| } |
| } |
| |
| if (deserializeBuffer.AvailableSize() != 0) { |
| return nullptr; |
| } |
| |
| return commands; |
| } |
| |
| } // namespace dawn::wire::server |