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+//==========================================================================
+//
+// sync2.cxx
+//
+// Sync test 2 -- test of different locking mechanisms
+//
+//==========================================================================
+//####ECOSGPLCOPYRIGHTBEGIN####
+// -------------------------------------------
+// This file is part of eCos, the Embedded Configurable Operating System.
+// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+//
+// eCos is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 2 or (at your option) any later version.
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with eCos; if not, write to the Free Software Foundation, Inc.,
+// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+//
+// As a special exception, if other files instantiate templates or use macros
+// or inline functions from this file, or you compile this file and link it
+// with other works to produce a work based on this file, this file does not
+// by itself cause the resulting work to be covered by the GNU General Public
+// License. However the source code for this file must still be made available
+// in accordance with section (3) of the GNU General Public License.
+//
+// This exception does not invalidate any other reasons why a work based on
+// this file might be covered by the GNU General Public License.
+//
+// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
+// at http://sources.redhat.com/ecos/ecos-license/
+// -------------------------------------------
+//####ECOSGPLCOPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s): dsm
+// Contributors: dsm
+// Date: 1998-02-18
+// Description:
+// Creates some threads and tests the various synchronization
+// mechanisms. Four threads are created t0..t3. t0 and t3 grab a
+// mutex and check they have exclusive access to shared variable.
+// t0,t1,t2 post each other in a loop with a semaphore so that
+// only one is running at any time. t1,t2,t3 do a similar thing
+// with counting semaphores, except that there are two active
+// threads.
+// Omissions:
+// Doesn't test condition variables
+//
+//####DESCRIPTIONEND####
+
+#include <pkgconf/kernel.h>
+
+#include <cyg/kernel/thread.hxx>
+#include <cyg/kernel/thread.inl>
+#include <cyg/kernel/sched.hxx>
+#include <cyg/kernel/mutex.hxx>
+#include <cyg/kernel/sema.hxx>
+
+#include <cyg/infra/testcase.h>
+
+#include <cyg/kernel/sched.inl>
+
+#define NTHREADS 4
+
+#include "testaux.hxx"
+
+static Cyg_Mutex m0;
+static Cyg_Binary_Semaphore s0, s1, s2(1);
+static Cyg_Counting_Semaphore cs0, cs1, cs2, cs3;
+
+static const cyg_ucount16 n = 1000;
+static cyg_ucount8 m0d=99, sd=2, cd0=99, cd1=99;
+
+static void entry0( CYG_ADDRWORD data )
+{
+ for(cyg_ucount16 i=0; i<n; i++) {
+ s2.wait();
+ CHECK( 2 == sd );
+ sd = 0;
+ m0.lock(); {
+ m0d = 0;
+ s0.post();
+ CHECK( 0 == m0d );
+ } m0.unlock();
+ }
+ // wait for 3 explicit posts to indicate threads have stopped.
+ for(cyg_ucount8 i=0; i<3; i++)
+ cs3.wait();
+
+ CHECK( ! s0.posted() );
+ CHECK( ! s1.posted() );
+ CHECK( s2.posted() );
+
+ CHECK( 0 == cs0.peek() );
+ CHECK( 0 == cs1.peek() );
+ CHECK( 0 == cs2.peek() );
+ CHECK( 0 == cs3.peek() );
+
+ CHECK( 0 == cd0 );
+ CHECK( 0 == cd1 );
+ CYG_TEST_PASS_FINISH("Sync 2 OK");
+ CYG_TEST_FAIL_FINISH("Not reached");
+}
+
+static void entry1( CYG_ADDRWORD data )
+{
+ for(cyg_ucount16 i=0; i<n; i++) {
+ s0.wait();
+ CHECK( 0 == sd );
+ sd = 1;
+ cd0 = 1;
+ cs1.post();
+ cd1 = 1;
+ cs1.post();
+ s1.post();
+ cs0.wait();
+ CHECK( 0 == cd0 );
+ cs0.wait();
+ CHECK( 0 == cd1 );
+ }
+ cs3.post();
+ s0.wait();
+ CYG_TEST_FAIL_FINISH("Not reached");
+}
+
+static void entry2( CYG_ADDRWORD data )
+{
+ for(cyg_ucount16 i=0; i<n; i++) {
+ s1.wait();
+ CHECK( 1 == sd );
+ sd = 2;
+ cs1.wait();
+ CHECK( 1 == cd0 );
+ cd0 = 2;
+ cs2.post();
+ s2.post();
+ cs1.wait();
+ CHECK( 1 == cd1 );
+ cd1 = 2;
+ cs2.post();
+ }
+ cs3.post();
+ s1.wait();
+ CYG_TEST_FAIL_FINISH("Not reached");
+}
+
+static void entry3( CYG_ADDRWORD data )
+{
+ for(cyg_ucount16 i=0; i < n*2; i++) {
+ cs2.wait();
+ CHECK( 2 == cd0 || 2 == cd1 );
+ m0.lock(); {
+ m0d = 3;
+ if( 2 == cd0 )
+ cd0 = 0;
+ else {
+ CHECK( 2 == cd1 );
+ cd1 = 0;
+ }
+ cs0.post();
+ CHECK( 3 == m0d );
+ } m0.unlock();
+ }
+ cs3.post();
+ cs1.wait();
+ CYG_TEST_FAIL_FINISH("Not reached");
+}
+
+
+void sync2_main(void)
+{
+ CYG_TEST_INIT();
+
+ new_thread(entry0, 0);
+ new_thread(entry1, 1);
+ new_thread(entry2, 2);
+ new_thread(entry3, 3);
+
+ Cyg_Scheduler::start();
+
+ CYG_TEST_PASS_FINISH("Not reached");
+}
+
+externC void
+cyg_start( void )
+{
+#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
+ cyg_hal_invoke_constructors();
+#endif
+ sync2_main();
+}
+
+// EOF sync2.cxx