161 lines
4.0 KiB
C++
161 lines
4.0 KiB
C++
/*
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* Copyright 2017 Discord, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include "discord_connection.h"
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#define WIN32_LEAN_AND_MEAN
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#define NOMCX
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#define NOSERVICE
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#define NOIME
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#include <cassert>
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#include <windows.h>
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namespace discord_rpc {
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int GetProcessId() {
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return static_cast<int>(::GetCurrentProcessId());
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}
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struct BaseConnectionWin : public BaseConnection {
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HANDLE pipe { INVALID_HANDLE_VALUE };
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};
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static BaseConnectionWin Connection;
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BaseConnection *BaseConnection::Create() {
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return &Connection;
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}
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void BaseConnection::Destroy(BaseConnection *&c) {
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auto self = reinterpret_cast<BaseConnectionWin*>(c);
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self->Close();
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c = nullptr;
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}
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bool BaseConnection::Open() {
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wchar_t pipeName[] { L"\\\\?\\pipe\\discord-ipc-0" };
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const size_t pipeDigit = sizeof(pipeName) / sizeof(wchar_t) - 2;
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pipeName[pipeDigit] = L'0';
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auto self = reinterpret_cast<BaseConnectionWin *>(this);
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for (;;) {
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self->pipe = ::CreateFileW(pipeName, GENERIC_READ | GENERIC_WRITE, 0, nullptr, OPEN_EXISTING, 0, nullptr);
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if (self->pipe != INVALID_HANDLE_VALUE) {
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self->isOpen = true;
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return true;
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}
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auto lastError = GetLastError();
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if (lastError == ERROR_FILE_NOT_FOUND) {
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if (pipeName[pipeDigit] < L'9') {
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pipeName[pipeDigit]++;
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continue;
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}
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}
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else if (lastError == ERROR_PIPE_BUSY) {
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if (!WaitNamedPipeW(pipeName, 10000)) {
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return false;
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}
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continue;
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}
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return false;
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}
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}
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bool BaseConnection::Close() {
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auto self = reinterpret_cast<BaseConnectionWin *>(this);
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::CloseHandle(self->pipe);
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self->pipe = INVALID_HANDLE_VALUE;
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self->isOpen = false;
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return true;
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}
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bool BaseConnection::Write(const void *data, size_t length) {
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if (length == 0) {
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return true;
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}
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auto self = reinterpret_cast<BaseConnectionWin *>(this);
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assert(self);
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if (!self) {
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return false;
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}
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if (self->pipe == INVALID_HANDLE_VALUE) {
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return false;
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}
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assert(data);
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if (!data) {
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return false;
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}
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const DWORD bytesLength = static_cast<DWORD>(length);
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DWORD bytesWritten = 0;
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return ::WriteFile(self->pipe, data, bytesLength, &bytesWritten, nullptr) == TRUE && bytesWritten == bytesLength;
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}
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bool BaseConnection::Read(void *data, size_t length) {
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assert(data);
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if (!data) {
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return false;
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}
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auto self = reinterpret_cast<BaseConnectionWin *>(this);
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assert(self);
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if (!self) {
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return false;
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}
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if (self->pipe == INVALID_HANDLE_VALUE) {
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return false;
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}
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DWORD bytesAvailable = 0;
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if (::PeekNamedPipe(self->pipe, nullptr, 0, nullptr, &bytesAvailable, nullptr)) {
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if (bytesAvailable >= length) {
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DWORD bytesToRead = static_cast<DWORD>(length);
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DWORD bytesRead = 0;
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if (::ReadFile(self->pipe, data, bytesToRead, &bytesRead, nullptr) == TRUE) {
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assert(bytesToRead == bytesRead);
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return true;
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}
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else {
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Close();
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}
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}
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}
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else {
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Close();
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}
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return false;
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}
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} // namespace discord_rpc
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