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authorSven Gothel <[email protected]>2015-03-28 01:43:35 +0100
committerSven Gothel <[email protected]>2015-03-28 01:43:35 +0100
commit4207f9c279e832e3afcb3f5fc6cd8d84cb4cfe4c (patch)
treecf3671058d55b47ab6cb6f36f369928606137628 /LibOVRKernel/Src/Kernel/OVR_Log.h
parentc29cd1a2fbff6282bab956ad61661ac9d48c4e6e (diff)
Bump OculusVR RIFT SDK to 0.5.0.1vanilla_0.5.0.1
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+/************************************************************************************
+
+PublicHeader: OVR
+Filename : OVR_Log.h
+Content : Logging support
+Created : September 19, 2012
+Notes :
+
+Copyright : Copyright 2014 Oculus VR, LLC All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License");
+you may not use the Oculus VR Rift SDK except in compliance with the License,
+which is provided at the time of installation or download, or which
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.2
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+************************************************************************************/
+
+#ifndef OVR_Log_h
+#define OVR_Log_h
+
+#include "OVR_Types.h"
+#include "OVR_Delegates.h"
+#include "OVR_Callbacks.h"
+#include <stdarg.h>
+
+namespace OVR {
+
+//-----------------------------------------------------------------------------------
+// ***** Logging Constants
+
+// LogMaskConstants defined bit mask constants that describe what log messages
+// should be displayed.
+enum LogMaskConstants
+{
+ LogMask_Regular = 0x100,
+ LogMask_Debug = 0x200,
+ LogMask_None = 0,
+ LogMask_All = LogMask_Regular|LogMask_Debug
+};
+
+// LogLevel should match the CAPI ovrLogLevel enum, values are passed back to ovrLogCallback
+enum LogLevel
+{
+ LogLevel_Debug = 0,
+ LogLevel_Info = 1,
+ LogLevel_Error = 2
+};
+
+// LogMessageType describes the type of the log message, controls when it is
+// displayed and what prefix/suffix is given to it. Messages are subdivided into
+// regular and debug logging types. Debug logging is only generated in debug builds.
+//
+// Log_Text - General output text displayed without prefix or new-line.
+// Used in OVR libraries for general log flow messages
+// such as "Device Initialized".
+//
+// Log_Error - Error message output with "Error: %s\n", intended for
+// application/sample-level use only, in cases where an expected
+// operation failed. OVR libraries should not use this internally,
+// reporting status codes instead.
+//
+// Log_DebugText - Message without prefix or new lines; output in Debug build only.
+//
+// Log_Debug - Debug-build only message, formatted with "Debug: %s\n".
+// Intended to comment on incorrect API usage that doesn't lead
+// to crashes but can be avoided with proper use.
+// There is no Debug Error on purpose, since real errors should
+// be handled by API user.
+//
+// Log_Assert - Debug-build only message, formatted with "Assert: %s\n".
+// Intended for severe unrecoverable conditions in library
+// source code. Generated though OVR_ASSERT_MSG(c, "Text").
+
+enum LogMessageType
+{
+ // General Logging
+ Log_Text = LogMask_Regular | 0,
+ Log_Error = LogMask_Regular | 1, // "Error: %s\n".
+
+ // Debug-only messages (not generated in release build)
+ Log_DebugText = LogMask_Debug | 0,
+ Log_Debug = LogMask_Debug | 1, // "Debug: %s\n".
+ Log_Assert = LogMask_Debug | 2, // "Assert: %s\n".
+};
+
+
+// LOG_VAARG_ATTRIBUTE macro, enforces printf-style formatting for message types
+#ifdef __GNUC__
+# define OVR_LOG_VAARG_ATTRIBUTE(a,b) __attribute__((format (printf, a, b)))
+#else
+# define OVR_LOG_VAARG_ATTRIBUTE(a,b)
+#endif
+
+//-----------------------------------------------------------------------------------
+// ***** Log
+
+// Log defines a base class interface that can be implemented to catch both
+// debug and runtime messages.
+// Debug logging can be overridden by calling Log::SetGlobalLog.
+
+class Log
+{
+ friend class System;
+
+#ifdef OVR_OS_WIN32
+ void* hEventSource;
+#endif
+
+public:
+ Log(unsigned logMask = LogMask_Debug);
+ virtual ~Log();
+
+ typedef Delegate2<void, const char*, LogMessageType> LogHandler;
+
+ // The following is deprecated, as there is no longer a max log buffer message size.
+ enum { MaxLogBufferMessageSize = 4096 };
+
+ unsigned GetLoggingMask() const { return LoggingMask; }
+ void SetLoggingMask(unsigned logMask) { LoggingMask = logMask; }
+
+ static void AddLogObserver(CallbackListener<LogHandler>* listener);
+
+ // This is the same callback signature as in the CAPI.
+ typedef void (*CAPICallback)(int level, const char* message);
+
+ // This function should be called before OVR::Initialize()
+ static void SetCAPICallback(CAPICallback callback);
+
+ // Internal
+ // Invokes observers, then calls LogMessageVarg()
+ static void LogMessageVargInt(LogMessageType messageType, const char* fmt, va_list argList);
+
+ // This virtual function receives all the messages,
+ // developers should override this function in order to do custom logging
+ virtual void LogMessageVarg(LogMessageType messageType, const char* fmt, va_list argList);
+
+ // Call the logging function with specific message type, with no type filtering.
+ void LogMessage(LogMessageType messageType,
+ const char* fmt, ...) OVR_LOG_VAARG_ATTRIBUTE(3,4);
+
+
+ // Helper used by LogMessageVarg to format the log message, writing the resulting
+ // string into buffer. It formats text based on fmt and appends prefix/new line
+ // based on LogMessageType. Return behavior is the same as ISO C vsnprintf: returns the
+ // required strlen of buffer (which will be >= bufferSize if bufferSize is insufficient)
+ // or returns a negative value because the input was bad.
+ static int FormatLog(char* buffer, size_t bufferSize, LogMessageType messageType,
+ const char* fmt, va_list argList);
+
+ // Default log output implementation used by by LogMessageVarg.
+ // Debug flag may be used to re-direct output on some platforms, but doesn't
+ // necessarily disable it in release builds; that is the job of the called.
+ void DefaultLogOutput(const char* textBuffer, LogMessageType messageType, int bufferSize = -1);
+
+ // Determines if the specified message type is for debugging only.
+ static bool IsDebugMessage(LogMessageType messageType)
+ {
+ return (messageType & LogMask_Debug) != 0;
+ }
+
+ // *** Global APIs
+
+ // Global Log registration APIs.
+ // - Global log is used for OVR_DEBUG messages. Set global log to null (0)
+ // to disable all logging.
+ static void SetGlobalLog(Log *log);
+ static Log* GetGlobalLog();
+
+ // Returns default log singleton instance.
+ static Log* GetDefaultLog();
+
+ // Applies logMask to the default log and returns a pointer to it.
+ // By default, only Debug logging is enabled, so to avoid SDK generating console
+ // messages in user app (those are always disabled in release build,
+ // even if the flag is set). This function is useful in System constructor.
+ static Log* ConfigureDefaultLog(unsigned logMask = LogMask_Debug)
+ {
+ Log* log = GetDefaultLog();
+ log->SetLoggingMask(logMask);
+ return log;
+ }
+
+private:
+ // Logging mask described by LogMaskConstants.
+ unsigned LoggingMask;
+};
+
+
+//-----------------------------------------------------------------------------------
+// ***** Global Logging Functions and Debug Macros
+
+// These functions will output text to global log with semantics described by
+// their LogMessageType.
+void LogText(const char* fmt, ...) OVR_LOG_VAARG_ATTRIBUTE(1,2);
+void LogError(const char* fmt, ...) OVR_LOG_VAARG_ATTRIBUTE(1,2);
+
+#ifdef OVR_BUILD_DEBUG
+
+ // Debug build only logging.
+ void LogDebugText(const char* fmt, ...) OVR_LOG_VAARG_ATTRIBUTE(1,2);
+ void LogDebug(const char* fmt, ...) OVR_LOG_VAARG_ATTRIBUTE(1,2);
+ void LogAssert(const char* fmt, ...) OVR_LOG_VAARG_ATTRIBUTE(1,2);
+
+ // Macro to do debug logging, printf-style.
+ // An extra set of set of parenthesis must be used around arguments,
+ // as in: OVR_DEBUG_LOG(("Value %d", 2)).
+ #define OVR_DEBUG_LOG(args) do { OVR::LogDebug args; } while(0)
+ #define OVR_DEBUG_LOG_TEXT(args) do { OVR::LogDebugText args; } while(0)
+
+ // Conditional logging. It logs when the condition 'c' is true.
+ #define OVR_DEBUG_LOG_COND(c, args) do { if ((c)) { OVR::LogDebug args; } } while(0)
+ #define OVR_DEBUG_LOG_TEXT_COND(c, args) do { if ((c)) { OVR::LogDebugText args; } } while(0)
+
+ // Conditional logging & asserting. It asserts/logs when the condition 'c' is NOT true.
+ #define OVR_ASSERT_LOG(c, args) do { if (!(c)) { OVR::LogAssert args; OVR_DEBUG_BREAK; } } while(0)
+
+#else
+
+ // If not in debug build, macros do nothing.
+ #define OVR_DEBUG_LOG(args) ((void)0)
+ #define OVR_DEBUG_LOG_TEXT(args) ((void)0)
+ #define OVR_DEBUG_LOG_COND(c, args) ((void)0)
+ #define OVR_DEBUG_LOG_TEXT_COND(args) ((void)0)
+ #define OVR_ASSERT_LOG(c, args) ((void)0)
+
+#endif
+
+} // OVR
+
+#endif