reactos/rostests/tests/thread_msg/thread_msg.c

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/**
* Test case for PostThreadMessage
* (C) 2003 ReactOS
* License: LGPL
* See: LGPL.txt in top directory.
* Author: arty
*
* Windows thread message queue test case.
* Derived from ../event/event.c in part.
*/
#include <windows.h>
#include <stdio.h>
#include <assert.h>
HANDLE hWaitForFailure;
HANDLE hOkToPostThreadMessage;
HANDLE hOkToTerminate;
DWORD WINAPI thread( LPVOID crap )
{
MSG msg;
/* Failure case ... Wait for the parent to try to post a message
before queue creation */
printf( "Waiting to create the message queue.\n" );
WaitForSingleObject(hWaitForFailure,INFINITE);
printf( "Creating message queue.\n" );
/* "Create" a message queue */
PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE );
printf( "Signalling the parent that we're ready.\n" );
/* Signal that it's ok to post */
SetEvent( hOkToPostThreadMessage );
printf( "Listening messages.\n" );
/* Now read some messages */
while( GetMessage( &msg, 0,0,0 ) ) {
printf( "Received message: %04x %04x %08lx\n",
(msg.message & 0xffff),
(msg.wParam & 0xffff),
msg.lParam );
assert( !msg.hwnd );
}
printf( "Finished receiving messages.\n" );
SetEvent( hOkToTerminate );
return 0;
}
int main( int argc, char **argv )
{
DWORD id;
printf( "Creating events\n" );
hOkToPostThreadMessage = CreateEvent( NULL, FALSE, FALSE, NULL );
hOkToTerminate = CreateEvent( NULL, FALSE, FALSE, NULL );
hWaitForFailure = CreateEvent( NULL, FALSE, FALSE, NULL );
printf( "Created events\n" );
if( CreateThread( 0, 0, thread, 0, 0, &id ) == NULL ) {
printf( "Couldn't create one thread.\n" );
return 0;
}
printf( "Posting to non-existent queue\n" );
/* Check failure case */
assert( PostThreadMessage( id, WM_USER + 0, 1, 2 ) == FALSE );
printf( "Signalling thread to advance.\n" );
SetEvent( hWaitForFailure );
printf( "Waiting for signal from thread.\n" );
WaitForSingleObject( hOkToPostThreadMessage, INFINITE );
printf( "Sending three messages, then quit.\n" );
assert( PostThreadMessage( id, WM_USER + 0, 1, 2 ) );
assert( PostThreadMessage( id, WM_USER + 1, 3, 4 ) );
Sleep( 500 ); /* Sleep a bit, so that the queue is empty for a bit. */
assert( PostThreadMessage( id, WM_USER + 2, 5, 6 ) );
assert( PostThreadMessage( id, WM_QUIT, 0,0 ) );
WaitForSingleObject( hOkToTerminate, INFINITE );
printf( "Test complete.\n" );
return 0;
}