error C2678 and C2440

[satish <satishjadav at gmail dot com>]

Hi,
I am porting my multi threading(using pthread) Linux project to
windows. The compiler is MS VC++ 2005.
I am using pthread-win32, downloaded from
"http://sourceware.org/pthreads-win32/";.
For version, here is a line from pthread.h
"#define PTW32_VERSION 2,7,0,0"

The project compilation is almost done but I am  getting few errors
related to pthread.

A.:- Have a look on following code,
----------------------------------------------------------------
#define MAXTHREADS 1000
typedef struct {
	pthread_t id;
	pthread_mutex_t lock;
	pthread_cond_t cond;
} THREADLIST;

THREADLIST threads[MAXTHREADS];

1281 int thread_find() {
1282	int thread = -1;
1283	pthread_t self = pthread_self();
1284	pthread_mutex_lock(&threadlistlock);
1285	for (int i = 0; i < MAXTHREADS; i++) {
1286		if (threads[i].flags != THREAD_UNUSED && threads[i].id ==
self)				1287				thread = i;
1288			break;
1289		}
1290	}
1291	pthread_mutex_unlock(&threadlistlock);
1292	return thread;
1293 }
----------------------------------------------------------------

The error, I am getting is,

1>main.cpp(1286) : error C2678: binary '==' : no operator found which
takes a left-hand operand of type 'pthread_t' (or there is no
acceptable conversion)
1> c:\program files\microsoft visual studio
8\vc\platformsdk\include\guiddef.h(192): could be 'int operator
==(const GUID &,const GUID &)'
1> while trying to match the argument list '(pthread_t, pthread_t)'


B.:- Another piece of code on which I am getting error is,
----------------------------------------------------------------
50 unsigned long MY_pthreads_thread_id(void)
51 {
52    int ret;
53	ret = pthread_self();
54	return (ret);
55 }
----------------------------------------------------------------
Here, it gives error like,

1>main.cpp(53) : error C2440: '=' : cannot convert from 'pthread_t' to 'int'

Can you please tell me the reason behind these errors?
I will be very thankful to you.

Regards
Satish