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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*=====================================================================
**
** Source: test4.c (DuplicateHandle)
**
** Purpose: Tests the PAL implementation of the DuplicateHandle function.
** This test duplication of a Mutex handle. The test will comprise
** of creating a Mutex and its duplicate and create a thread that
** will get ownership. Another thread will be create that will
** attempt to get ownership of the duplicate Mutex, this will
** fail, since the Mutex is owned by another thread. The Mutex
** will be released and then the thread will attempt to get
** ownership of the duplicate Mutex, this will succeed.
**
**
**===================================================================*/
#include <palsuite.h>
enum wait_results
{
WR_WAITING,
WR_GOT_MUTEX,
WR_TIMED_OUT,
WR_RELEASED
};
volatile int t1_result=WR_WAITING;
volatile int t2_result=WR_WAITING;
DWORD PALAPI ThreadTest1(LPVOID lpParam)
{
DWORD dwWait;
dwWait = WaitForSingleObject((HANDLE)lpParam, 0);
if (dwWait == WAIT_OBJECT_0)
{
/* tell the main thread we got the mutex */
t1_result=WR_GOT_MUTEX;
/* wait for main thread to tell us to release the mutex */
while(WR_GOT_MUTEX == t1_result)
Sleep(1);
ReleaseMutex((HANDLE)lpParam);
/* tell the main thread we released the mutex */
t1_result = WR_RELEASED;
}
else
{
t1_result = WR_TIMED_OUT;
}
return 0;
}
DWORD PALAPI ThreadTest2(LPVOID lpParam)
{
DWORD dwWait;
dwWait = WaitForSingleObject((HANDLE)lpParam, 0 );
if (dwWait == WAIT_OBJECT_0)
{
ReleaseMutex((HANDLE)lpParam);
t2_result = WR_GOT_MUTEX;
}
else
{
t2_result = WR_TIMED_OUT;
}
return 0;
}
int __cdecl main(int argc, char **argv)
{
HANDLE hDupMutex;
HANDLE hMutex;
HANDLE hThread;
HANDLE hThread2;
BOOL bDupHandle=FALSE;
DWORD dwThreadId = 0;
if ((PAL_Initialize(argc,argv)) != 0)
{
return(FAIL);
}
/*Create Mutex without ownership*/
hMutex = CreateMutexW(NULL, // no security attributes
FALSE, // initially not owned
NULL); // name of mutex
if (hMutex == NULL)
{
Fail("ERROR:%u: Unable to create mutex\n",
GetLastError());
}
/*Create Duplicate of the Mutex above*/
bDupHandle = DuplicateHandle(GetCurrentProcess(),
hMutex,
GetCurrentProcess(),
&hDupMutex,
GENERIC_READ|GENERIC_WRITE,
FALSE,
DUPLICATE_SAME_ACCESS);
if (!bDupHandle)
{
Trace("ERROR:%u: Created the duplicate handle to "
"closed event handle hMutex=0x%lx\n",
GetLastError(),
hMutex);
CloseHandle(hMutex);
Fail("");
}
/*Create a thread to test the Mutex*/
hThread = CreateThread(NULL,
0,
&ThreadTest1,
hMutex,
0,
&dwThreadId);
if (hThread == NULL)
{
Trace("ERROR:%u: unable to create thread\n",
GetLastError());
CloseHandle(hMutex);
CloseHandle(hDupMutex);
Fail("");
}
/* wait until thread has taken the mutex */
while (WR_WAITING == t1_result)
Sleep(1);
if(WR_TIMED_OUT == t1_result)
{
Trace("ERROR: %u: thread 1 couldn't acquire the mutex\n");
CloseHandle(hMutex);
CloseHandle(hDupMutex);
CloseHandle(hThread);
Fail("");
}
/*Create a second thread to use the duplicate Mutex*/
/*This should fail since the Mutex is owned hThread*/
hThread2 = CreateThread(NULL,
0,
&ThreadTest2,
hDupMutex,
0,
&dwThreadId);
if (hThread2 == NULL)
{
Trace("ERROR:%u: unable to create thread\n",
GetLastError());
CloseHandle(hMutex);
CloseHandle(hDupMutex);
CloseHandle(hThread);
Fail("");
}
/* wait until thread has tried to take the mutex */
while (WR_WAITING == t2_result)
Sleep(1);
if (WR_TIMED_OUT != t2_result )
{
Trace("ERROR:%u: Able to take mutex %#x while its duplicate %#x is "
"held\n", hDupMutex, hMutex);
CloseHandle(hMutex);
CloseHandle(hDupMutex);
CloseHandle(hThread);
CloseHandle(hThread2);
Fail("");
}
/* reset second thread status */
t2_result = WR_WAITING;
/* tell thread 1 to release the mutex */
t1_result = WR_WAITING;
/* wait for thread 1 to release the mutex */
while (WR_WAITING == t1_result)
Sleep(1);
CloseHandle(hThread2);
/*Re-Create the second thread to reuse the duplicated Mutex*/
/*This test should pass, the Mutex has since been released*/
hThread2 = CreateThread(NULL,
0,
&ThreadTest2,
hDupMutex,
0,
&dwThreadId);
if (hThread2 == NULL)
{
Trace("ERROR:%u: unable to create thread\n",
GetLastError());
CloseHandle(hMutex);
CloseHandle(hDupMutex);
CloseHandle(hThread);
Fail("");
}
/* wait until thread has taken the mutex */
while (WR_WAITING == t2_result)
Sleep(1);
if (WR_GOT_MUTEX != t2_result )
{
Trace("ERROR:%u: Unable to take mutex %#x after its duplicate %#x was "
"released\n", hDupMutex, hMutex);
CloseHandle(hMutex);
CloseHandle(hDupMutex);
CloseHandle(hThread);
CloseHandle(hThread2);
Fail("");
}
/*Cleanup.*/
CloseHandle(hMutex);
CloseHandle(hDupMutex);
CloseHandle(hThread);
CloseHandle(hThread2);
PAL_Terminate();
return (PASS);
}
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