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# rt.dmain2

Contains druntime startup and shutdown routines.
License:
Distributed under the Boost Software License 1.0. (See accompanying file LICENSE)
Authors:
Walter Bright, Sean Kelly

Source rt/dmain2.d

shared size_t `_initCount`;
  Keep track of how often rt_init/rt_term were called.
int `rt_init`();
  Initialize druntime. If a C program wishes to call D code, and there's no D main(), then it must call rt_init() and rt_term().
int `rt_term`();
  Terminate use of druntime.
alias `TraceHandler` = TraceInfo function(void* ptr);
  Trace handler
void `rt_setTraceHandler`(TraceHandler `h`, Throwable.TraceDeallocator `d` = null);
  Overrides the default trace hander with a user-supplied version.
  Parameters:

  TraceHandler `h` | The new trace handler. Set to null to use the default handler.
  Throwable.TraceDeallocator `d` | The new dealloactor to use.

TraceHandler `rt_getTraceHandler`();
  Return the current trace handler
Throwable.TraceInfo `_d_traceContext`(void* `ptr` = null);
  This function will be called when an exception is constructed. The user-supplied trace handler will be called if one has been supplied, otherwise no trace will be generated.
  Parameters:

  void* `ptr` | A pointer to the location from which to generate the trace, or null if the trace should be generated from within the trace handler itself.

  Returns:
  An object describing the current calling context or null if no handler is supplied.
struct `CArgs`;
  Provide out-of-band access to the original C argc/argv passed to this program via main(argc,argv).
int `_d_run_main`(int `argc`, char** `argv`, MainFunc `mainFunc`);
  Sets up the D char[][] command-line args, initializes druntime, runs embedded unittests and then runs the given D main() function, optionally catching and printing any unhandled exceptions.

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