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/*
* mthr_init.c
*
* Do the thread-support DLL initialization.
*
* This file is used iff the following conditions are met:
* - gcc uses -mthreads option
* - user code uses C++ exceptions
*
* The sole job of the Mingw thread support DLL (MingwThr) is to catch
* all the dying threads and clean up the data allocated in the TLSs
* for exception contexts during C++ EH. Posix threads have key dtors,
* but win32 TLS keys do not, hence the magic. Without this, there's at
* least `24 * sizeof (void*)' bytes leaks for each catch/throw in each
* thread.
*
* See mthr.c for all the magic.
*
* Created by Mumit Khan <khan@nanotech.wisc.edu>
*
*/
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
#include <stdio.h>
BOOL APIENTRY DllMain (HANDLE hDllHandle, DWORD reason,
LPVOID reserved /* Not used. */ );
/*
*----------------------------------------------------------------------
*
* DllMain --
*
* This routine is called by the Mingw32, Cygwin32 or VC++ C run
* time library init code, or the Borland DllEntryPoint routine. It
* is responsible for initializing various dynamically loaded
* libraries.
*
* Results:
* TRUE on sucess, FALSE on failure.
*
* Side effects:
*
*----------------------------------------------------------------------
*/
BOOL APIENTRY
DllMain (HANDLE hDllHandle /* Library instance handle. */,
DWORD reason /* Reason this function is being called. */,
LPVOID reserved /* Not used. */)
{
extern CRITICAL_SECTION __mingwthr_cs;
extern void __mingwthr_run_key_dtors( void );
#ifdef DEBUG
printf ("%s: reason %d\n", __FUNCTION__, reason );
#endif
switch (reason)
{
case DLL_PROCESS_ATTACH:
InitializeCriticalSection (&__mingwthr_cs);
break;
case DLL_PROCESS_DETACH:
__mingwthr_run_key_dtors();
DeleteCriticalSection (&__mingwthr_cs);
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
__mingwthr_run_key_dtors();
break;
}
return TRUE;
}
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