C / C++ / MFC

template <class T> void foo()
{
   printf("sizeof(..)=%i\n", sizeof(T));
}


int main(int argc, char * argv[])
{
   foo<BYTE>();  // (*) prints 4 !!!!
   foo<float>(); // prints 4
   return 0;
}

template <class T> void foo(T * p = NULL)
{
   printf("sizeof(..)=%i\n", sizeof(T));
}

__declspec(dllexport) int Start(CDervDlg *dlg)
{
	dlg->m_SomeVar = TRUE; //Works fine
	dlg->SomeFunc("Blah", "Blah"); //Link error: unresolved external symbol.
}

<br />
/*<br />
 *<br />
 * Weird Irda problem and abnormally increasing HANDLE count...<br />
 * <br />
 * Two major problems in the code:<br />
 *<br />
 *   If the program starts from the strach and Irda device is in range and active<br />
 *   it finds it. But if the program has already been started, and the same Irda<br />
 *   device again is active and in range, cannot find it.<br />
 *<br />
 *   Why is it So(S?)<br />
 *<br />
 *   Another problem is, the HANDLE count of the program continuosly increasing.<br />
 *   I'm thinking that the problem is on the Winsock socket creation routine<br />
 *   but I also don't know ıf there any mechanism to give the socket handle back <br />
 *   to OS.<br />
 *<br />
 *   Thanks a lot.<br />
 *<br />
 */<br />
<br />
#include "Utility.h"<br />
#include <Af_irda.h><br />
<br />
#define IRDA_DEVICE_LIST_LEN    16<br />
#define IRDA_TRY_COUNT			30<br />
#define IRDA_TRY_SLEEP_MSEC		1000<br />
<br />
int				DevListLen = sizeof(DEVICELIST) <br />
								* IRDA_DEVICE_LIST_LEN;<br />
<br />
int				EnumTest(void);<br />
PDEVICELIST		EnumIrdaDevices(void);<br />
BOOL			EnumIrdaDevicesTest(void);<br />
<br />
int ExecuteIrdaEnumTest(void)<br />
{<br />
	int result;<br />
	result = EnumIrdaDevicesTest();<br />
<br />
	return result;<br />
}<br />
<br />
int EnumIrdaDevicesTest(void)<br />
{<br />
	int				iDeviceCount;<br />
	PDEVICELIST		pDevList;<br />
<br />
	int				iTryCount = 0;<br />
	int				iDeviceIndex = 0;<br />
<br />
	char*			scs = "|/-\\|/-\\";						// Used while scanning ascii-anim<br />
	short			scsLen = (short)strlen(scs);<br />
	int				schrIndex = 0;<br />
<br />
	printf("Searching for infra-red devices in range... ");<br />
	for (; iTryCount < IRDA_TRY_COUNT; iTryCount++)<br />
	{<br />
		if ((pDevList = EnumIrdaDevices()) != NULL)<br />
			break;<br />
<br />
		schrIndex %= scsLen;<br />
		printf("\b%c", scs[schrIndex++]);<br />
<br />
		free(pDevList);<br />
		Sleep(IRDA_TRY_SLEEP_MSEC);<br />
	}<br />
<br />
	if (pDevList)<br />
	{<br />
		printf("\n\n#%u device(s) has been found, enumerating...\n\n", pDevList->numDevice);<br />
		iDeviceCount = (int)pDevList->numDevice;<br />
		for (; iDeviceIndex < iDeviceCount; iDeviceIndex++)<br />
		{<br />
			printf("Device Info #%u :\n", (iDeviceIndex + 1));<br />
			printf("  Name: %s\n\n"		, pDevList->Device[iDeviceIndex].irdaDeviceName);<br />
		}<br />
	}<br />
	<br />
	free(pDevList);<br />
	return (pDevList != NULL) <br />
		? BE_SUCCESS<br />
		: BE_ERROR;<br />
}<br />
<br />
PDEVICELIST EnumIrdaDevices(void)<br />
{<br />
	int			iResult;<br />
	u_long		index = 0;<br />
	SOCKET		sock;<br />
	PDEVICELIST	pDevList;<br />
<br />
	sock = WSASocket(AF_IRDA, SOCK_STREAM, 0, NULL, 0, <br />
		WSA_FLAG_OVERLAPPED);<br />
<br />
	//<br />
	// I have allocated the variable in here, when I used it<br />
	// as an argument to this function, it sets the address of the<br />
	// pointer to 0x0 when the function returns, why?? I tried hard<br />
	// but couldn't found, even I'm not returning a local var...<br />
	//<br />
	pDevList = (PDEVICELIST) malloc(sizeof(DEVICELIST) * DevListLen);<br />
	<br />
	pDevList->numDevice = 0;<br />
	iResult = getsockopt(sock, SOL_IRLMP, IRLMP_ENUMDEVICES, <br />
		(char *)pDevList, &DevListLen);<br />
<br />
//	return ((pDevList->numDevice > 0) ? TRUE : FALSE);<br />
<br />
	if (pDevList->numDevice > 0)<br />
		return pDevList;<br />
	else<br />
	{<br />
		free(pDevList);<br />
		pDevList = 0;<br />
		return NULL;<br />
	}<br />
}<br />