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//==========================================================================
//
//        mutex1.cxx
//
//        Mutex test 1
//
//==========================================================================
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//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     nickg
// Contributors:  nickg
// Date:          1999-02-19
// Description:   Tests mutex release functionality
//####DESCRIPTIONEND####
 
#include <pkgconf/kernel.h>
 
#include <cyg/kernel/sched.hxx>        // Cyg_Scheduler::start()
#include <cyg/kernel/thread.hxx>       // Cyg_Thread
 
#include <cyg/kernel/mutex.hxx>
 
#include <cyg/infra/testcase.h>
 
#include <cyg/kernel/sched.inl>
#include <cyg/kernel/thread.inl>
 
// ------------------------------------------------------------------------
 
#if !defined(CYGPKG_KERNEL_SMP_SUPPORT)
 
// ------------------------------------------------------------------------
 
#define NTHREADS 4
#include "testaux.hxx"
#include "testaux.h"
 
// ------------------------------------------------------------------------
 
static Cyg_Mutex m0, m1;
static Cyg_Condition_Variable cvar0( m0 ), cvar1( m0 ), cvar2( m1 );
 
volatile int thread_state[NTHREADS];
 
// ------------------------------------------------------------------------
// This thread is meant to get hung up trying to re-acquire m0
// after waiting on the cv.
 
static void entry0( CYG_ADDRWORD data )
{
    CYG_TEST_INFO( "thread0: lock mutex 0");
 
    m0.lock();
 
    CYG_TEST_INFO( "thread0: wait cvar 0");
 
    thread_state[data] = 1;
 
    cvar0.wait();
 
    thread_state[data] = 2;
 
    CYG_TEST_INFO( "thread0: woke from cvar 0");
 
    CYG_TEST_INFO( "thread0: unlock mutex 0");
 
    m0.unlock();
 
    thread_state[data] = 3;
 
    CYG_TEST_INFO( "thread0: exit");
 
    thread[data]->exit();
}
 
// ------------------------------------------------------------------------
// This thread is meant to claim and keep m0.
 
static void entry1( CYG_ADDRWORD data )
{
    CYG_TEST_INFO( "thread1: lock mutex 0");
 
    m0.lock();
 
    CYG_TEST_INFO( "thread1: lock mutex 1");
 
    thread_state[data] = 1;
 
    m1.lock();
 
    thread_state[data] = 2;
 
    CYG_TEST_INFO( "thread1: wait cvar 2");
 
    cvar2.wait();
 
    thread_state[data] = 3;
 
    CYG_TEST_INFO( "thread1: woke from cvar 2");
 
    CYG_TEST_INFO( "thread1: unlock mutex 1");    
 
    m1.unlock();
 
    thread_state[data] = 4;
 
    CYG_TEST_INFO( "thread1: unlock m0");    
 
    m0.unlock();
 
    thread_state[data] = 5;
 
    CYG_TEST_INFO( "thread1: exit");
 
    thread[data]->exit();
}
 
// ------------------------------------------------------------------------
// This thread is meant to get hung trying to acquire m0, and then get
// released out of it by thread3.
 
static void entry2( CYG_ADDRWORD data )
{
    CYG_TEST_INFO( "thread2: lock mutex 0");
 
    thread_state[data] = 1;
 
    if( m0.lock() )
    {
        thread_state[data] = 2;
 
        CYG_TEST_INFO( "thread2: lock mutex 0 - returned TRUE");
        CYG_TEST_FAIL_FINISH(" m0.lock() returned TRUE" );
    }
    else
    {
        thread_state[data] = 3;
        CYG_TEST_INFO( "thread2: lock mutex 0 - returned FALSE");        
    }
 
    CYG_TEST_INFO( "thread2: exit");
 
    thread[data]->exit();    
}
 
// ------------------------------------------------------------------------
 
static void entry3( CYG_ADDRWORD data )
{
 
    CHECK( thread_state[0] == 1 );
    CHECK( thread_state[1] == 2 );
    CHECK( thread_state[2] == 1 );
 
    CYG_TEST_INFO( "thread3: signal  cvar 0");
 
    cvar0.signal();
 
    CHECK( thread_state[0] == 1 );
    CHECK( thread_state[1] == 2 );
    CHECK( thread_state[2] == 1 );
 
    CYG_TEST_INFO( "thread3: release mutex 0");
 
    m0.release();
 
    CHECK( thread_state[0] == 1 );
    CHECK( thread_state[1] == 2 );
    CHECK( thread_state[2] == 3 );
 
    CYG_TEST_INFO( "thread3: signal cvar 2");
 
    cvar2.signal();
 
    CHECK( thread_state[0] == 3 );
    CHECK( thread_state[1] == 5 );
    CHECK( thread_state[2] == 3 );
 
    CYG_TEST_PASS_FINISH( "mutex2 finished OK");
 
    CYG_TEST_INFO( "thread3: exit");
 
    thread[data]->exit();    
}
 
// ------------------------------------------------------------------------
 
void mutex2_main( void )
{
    CYG_TEST_INIT();
 
    new_thread(entry0, 0);
    new_thread(entry1, 1);
    new_thread(entry2, 2);
    new_thread(entry3, 3);
 
    // Set priorities from the top to prevent two threads getting
    // the same priority: this causes an ASSERT on some configurations.
    thread[3]->set_priority( 5 );
    thread[2]->set_priority( 4 );
    thread[1]->set_priority( 3 );
    thread[0]->set_priority( 2 );
 
    Cyg_Scheduler::start();
 
    CYG_TEST_FAIL_FINISH("Not reached");
}
 
// ------------------------------------------------------------------------
 
externC void
cyg_start( void )
{ 
#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
    cyg_hal_invoke_constructors();
#endif
    mutex2_main();
}
 
// ------------------------------------------------------------------------
 
#else // CYGPKG_KERNEL_SMP_SUPPORT
 
// ------------------------------------------------------------------------
 
externC void
cyg_start( void )
{ 
    CYG_TEST_INIT();
    CYG_TEST_PASS_FINISH("Mutex2 test requires:\n"
                         "!defined(CYGPKG_KERNEL_SMP_SUPPORT)\n");
 
}
 
// ------------------------------------------------------------------------
 
#endif // CYGPKG_KERNEL_SMP_SUPPORT
 
// ------------------------------------------------------------------------
// EOF mutex2.cxx