Howto access thread data outside a thread
- by Quandary
Question: I start the MS Text-to-speech engine in a thread, in order to avoid a crash on DLL_attach. It starts fine, and the text to speech engine gets initialized, but I can't access ISpVoice outside the thread. How can I access ISpVoice outside the thread ? It's a global variable after all...
#include <windows.h>
#include <sapi.h>
#include "XPThreads.h"
ISpVoice * pVoice = NULL;
unsigned long init_engine_thread(void* param)
{
Sleep(5000);
printf("lolthread\n");
//HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
HRESULT hr = CoInitialize(NULL);
if(FAILED(hr) )
{
MessageBox(NULL, TEXT("Failed To Initialize"), TEXT("Error"), 0);
char buffer[2000] ;
sprintf(buffer, "An error occured: 0x%08X.\n", hr);
FILE * pFile = fopen ( "c:\\temp\\CoInitialize_dll.txt" , "w" );
fwrite (buffer , 1 , strlen(buffer) , pFile );
fclose (pFile);
}
else
{
printf("trying to create instance.\n");
//HRESULT hr = CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_ALL, IID_ISpVoice, (void **) &pVoice);
//hr = CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_ALL, IID_ISpVoice, (void **) &pVoice);
//HRESULT hr = CoCreateInstance(__uuidof(ISpVoice), NULL, CLSCTX_INPROC_SERVER, IID_ISpVoice, (void **) &pVoice);
HRESULT hr = CoCreateInstance(__uuidof(SpVoice), NULL, CLSCTX_ALL, IID_ISpVoice, (void **) &pVoice);
if( SUCCEEDED( hr ) )
{
printf("Succeeded\n");
hr = pVoice->Speak(L"The text to speech engine has been successfully initialized.", 0, NULL);
}
else
{
printf("failed\n");
MessageBox(NULL, TEXT("Failed To Create COM instance"), TEXT("Error"), 0);
char buffer[2000] ;
sprintf(buffer, "An error occured: 0x%08X.\n", hr);
FILE * pFile = fopen ( "c:\\temp\\CoCreateInstance_dll.txt" , "w" );
fwrite (buffer , 1 , strlen(buffer) , pFile );
fclose (pFile);
}
}
if(pVoice != NULL)
{
pVoice->Release();
pVoice = NULL;
}
CoUninitialize();
return NULL;
}
XPThreads* ptrThread = new XPThreads(init_engine_thread);
BOOL APIENTRY DllMain( HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
//init_engine();
LoadLibrary(TEXT("ole32.dll"));
ptrThread->Run();
break;
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
break;
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}
