mirror of https://github.com/axmolengine/axmol.git
143 lines
4.1 KiB
C++
143 lines
4.1 KiB
C++
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/**
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* OpenAL cross platform audio library
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* Copyright (C) 1999-2000 by authors.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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* Or go to http://www.gnu.org/copyleft/lgpl.html
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*/
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#include "config.h"
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#endif
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#include <atomic>
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#include <csignal>
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#include <cstdarg>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <limits>
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#include <mutex>
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#include <vector>
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#include "AL/al.h"
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#include "AL/alc.h"
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#include "al/debug.h"
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#include "alc/alconfig.h"
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#include "alc/context.h"
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#include "almalloc.h"
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#include "alstring.h"
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#include "core/except.h"
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#include "core/logging.h"
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#include "direct_defs.h"
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#include "opthelpers.h"
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#include "strutils.h"
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bool TrapALError{false};
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void ALCcontext::setError(ALenum errorCode, const char *msg, ...)
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{
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auto message = std::vector<char>(256);
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va_list args, args2;
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va_start(args, msg);
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va_copy(args2, args);
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int msglen{std::vsnprintf(message.data(), message.size(), msg, args)};
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if(msglen >= 0 && static_cast<size_t>(msglen) >= message.size())
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{
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message.resize(static_cast<size_t>(msglen) + 1u);
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msglen = std::vsnprintf(message.data(), message.size(), msg, args2);
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}
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va_end(args2);
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va_end(args);
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if(msglen >= 0)
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msg = message.data();
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else
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{
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msg = "<internal error constructing message>";
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msglen = static_cast<int>(strlen(msg));
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}
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WARN("Error generated on context %p, code 0x%04x, \"%s\"\n",
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decltype(std::declval<void*>()){this}, errorCode, msg);
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if(TrapALError)
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{
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#ifdef _WIN32
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/* DebugBreak will cause an exception if there is no debugger */
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if(IsDebuggerPresent())
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DebugBreak();
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#elif defined(SIGTRAP)
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raise(SIGTRAP);
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#endif
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}
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ALenum curerr{AL_NO_ERROR};
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mLastError.compare_exchange_strong(curerr, errorCode);
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debugMessage(DebugSource::API, DebugType::Error, 0, DebugSeverity::High,
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{msg, static_cast<uint>(msglen)});
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}
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/* Special-case alGetError since it (potentially) raises a debug signal and
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* returns a non-default value for a null context.
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*/
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AL_API ALenum AL_APIENTRY alGetError(void) noexcept
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{
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auto context = GetContextRef();
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if(!context) UNLIKELY
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{
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static const ALenum deferror{[](const char *envname, const char *optname) -> ALenum
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{
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auto optstr = al::getenv(envname);
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if(!optstr)
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optstr = ConfigValueStr(nullptr, "game_compat", optname);
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if(optstr)
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{
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char *end{};
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auto value = std::strtoul(optstr->c_str(), &end, 0);
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if(end && *end == '\0' && value <= std::numeric_limits<ALenum>::max())
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return static_cast<ALenum>(value);
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ERR("Invalid default error value: \"%s\"", optstr->c_str());
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}
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return AL_INVALID_OPERATION;
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}("__ALSOFT_DEFAULT_ERROR", "default-error")};
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WARN("Querying error state on null context (implicitly 0x%04x)\n", deferror);
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if(TrapALError)
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{
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#ifdef _WIN32
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if(IsDebuggerPresent())
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DebugBreak();
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#elif defined(SIGTRAP)
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raise(SIGTRAP);
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#endif
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}
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return deferror;
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}
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return alGetErrorDirect(context.get());
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}
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FORCE_ALIGN ALenum AL_APIENTRY alGetErrorDirect(ALCcontext *context) noexcept
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{
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return context->mLastError.exchange(AL_NO_ERROR);
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}
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