First Commit

externals/openal-soft/al/error.cpp

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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 <cstring>
+#include <mutex>
+
+#include "AL/al.h"
+#include "AL/alc.h"
+
+#include "alc/context.h"
+#include "almalloc.h"
+#include "core/except.h"
+#include "core/logging.h"
+#include "opthelpers.h"
+#include "vector.h"
+
+
+bool TrapALError{false};
+
+void ALCcontext::setError(ALenum errorCode, const char *msg, ...)
+{
+    auto message = al::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>";
+
+    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);
+}
+
+AL_API ALenum AL_APIENTRY alGetError(void)
+START_API_FUNC
+{
+    ContextRef context{GetContextRef()};
+    if(!context) UNLIKELY
+    {
+        static constexpr ALenum deferror{AL_INVALID_OPERATION};
+        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;
+    }
+
+    return context->mLastError.exchange(AL_NO_ERROR);
+}
+END_API_FUNC