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