/*! \page pageglobalsapi Globals API (NvBlastGlobals)

The NvBlastGlobals library is a utility library which is used by NvBlastTk (see \ref pagehlapi) and some extensions (see \ref pageextapi) and samples.

It provides a global allocator, error callback, and profiler API.

<br>
\section globalsallocator Allocator

<b>Include NvBlastGlobals.h</b>
<br>

A global allocator with interface

\code
Nv::Blast::AllocatorCallback
\endcode

may be set by the user with the function

\code
NvBlastGlobalSetAllocatorCallback
\endcode

and accessed using

\code
NvBlastGlobalGetAllocatorCallback
\endcode

An internal, default allocator is used if the user does not set their own, or if NULL is passed into NvBlastGlobalSetAllocatorCallback.

This allocator is used by NvBlastTk, as well as any extension that allocates memory.  In addition, utility macros are provided such as
<b>NVBLAST_ALLOC</b>, <b>NVBLAST_FREE</b>, <b>NVBLAST_NEW</b>, and <b>NVBLAST_DELETE</b>.

<br>
\section globalserror Error Callback

<b>Include NvBlastGlobals.h</b>

A global error message callback with interface

\code
Nv::Blast::ErrorCallback
\endcode

may be set by the user with the function

\code
NvBlastGlobalSetErrorCallback
\endcode

and accessed using

\code
NvBlastGlobalGetErrorCallback
\endcode

An internal, default error callback is used if the user does not set their own, or if NULL is passed into NvBlastGlobalSetErrorCallback.

This error callback is used by NvBlastTk, as well as many extensions.  In addition, utility macros are provided such as
<b>NVBLAST_LOG_ERROR</b> and <b>NVBLAST_LOG_WARNING</b>.

Finally, a function with signature given by NvBlastLog is provided which uses the global error callback,

\code
Nv::Blast::logLL
\endcode

This function may be passed into any NvBlast&tm; function's log parameter.

<br>
\section globalsprofiler Profiler API

<b>Include NvBlastProfiler.h</b>
<br>

BlastTk contains many profiling zones which use the global profiler which can be accessed in this library.  The user may implement
the interface

\code
Nv::Blast::ProfilerCallback
\endcode

and pass it to the globals library using

\code
NvBlastProfilerSetCallback
\endcode

A NULL pointer may be passed in, disabling profiling.  Profiler features are only active in checked, debug and profile builds.

The granularity of events reported can be selected with

\code
NvBlastProfilerSetDetail
\endcode

<br>
*/