OpenAL32/alError.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 1999-2000 by authors.
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #include "config.h"
  22
  23 #include <signal.h>
  24 #include <stdarg.h>
  25
  26 #ifdef HAVE_WINDOWS_H
  27 #define WIN32_LEAN_AND_MEAN
  28 #include <windows.h>
  29 #endif
  30
  31 #include "alMain.h"
  32 #include "AL/alc.h"
  33 #include "alError.h"
  34
  35 ALboolean TrapALError = AL_FALSE;
  36
  37 void alSetError(ALCcontext *context, ALenum errorCode, const char *msg, ...)
  38 {
  39     ALenum curerr = AL_NO_ERROR;
  40     char message[1024] = { 0 };
  41     va_list args;
  42     int msglen;
  43
  44     va_start(args, msg);
  45     msglen = vsnprintf(message, sizeof(message), msg, args);
  46     va_end(args);
  47
  48     if(msglen < 0 || (size_t)msglen >= sizeof(message))
  49     {
  50         message[sizeof(message)-1] = 0;
  51         msglen = (int)strlen(message);
  52     }
  53     if(msglen > 0)
  54         msg = message;
  55     else
  56     {
  57         msg = "<internal error constructing message>";
  58         msglen = (int)strlen(msg);
  59     }
  60
  61     WARN("Error generated on context %p, code 0x%04x, \"%s\"\n",
  62          context, errorCode, message);
  63     if(TrapALError)
  64     {
  65 #ifdef _WIN32
  66         /* DebugBreak will cause an exception if there is no debugger */
  67         if(IsDebuggerPresent())
  68             DebugBreak();
  69 #elif defined(SIGTRAP)
  70         raise(SIGTRAP);
  71 #endif
  72     }
  73
  74     ATOMIC_COMPARE_EXCHANGE_STRONG_SEQ(&context->LastError, &curerr, errorCode);
  75     if((ATOMIC_LOAD(&context->EnabledEvts, almemory_order_relaxed)&EventType_Error))
  76     {
  77         ALbitfieldSOFT enabledevts;
  78         almtx_lock(&context->EventCbLock);
  79         enabledevts = ATOMIC_LOAD(&context->EnabledEvts, almemory_order_relaxed);
  80         if((enabledevts&EventType_Error) && context->EventCb)
  81             (*context->EventCb)(AL_EVENT_TYPE_ERROR_SOFT, 0, errorCode, msglen, msg,
  82                                 context->EventParam);
  83         almtx_unlock(&context->EventCbLock);
  84     }
  85 }
  86
  87 AL_API ALenum AL_APIENTRY alGetError(void)
  88 {
  89     ALCcontext *context;
  90     ALenum errorCode;
  91
  92     context = GetContextRef();
  93     if(!context)
  94     {
  95         const ALenum deferror = AL_INVALID_OPERATION;
  96         WARN("Querying error state on null context (implicitly 0x%04x)\n", deferror);
  97         if(TrapALError)
  98         {
  99 #ifdef _WIN32
 100             if(IsDebuggerPresent())
 101                 DebugBreak();
 102 #elif defined(SIGTRAP)
 103             raise(SIGTRAP);
 104 #endif
 105         }
 106         return deferror;
 107     }
 108
 109     errorCode = ATOMIC_EXCHANGE_SEQ(&context->LastError, AL_NO_ERROR);
 110
 111     ALCcontext_DecRef(context);
 112     return errorCode;
 113 }