diff packages/kernel/current/tests/memvar2.cxx @ 0:3111d98ba7b3 ecos-v1_1-release

Initial commit of eCos version 1.1
author jlarmour
date Tue, 11 May 1999 11:16:07 +0000
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+//==========================================================================
+//
+//        memvar2.cxx
+//
+//        Variable memory pool test 2
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):     dsm
+// Contributors:    dsm
+// Date:          1998-06-08
+// Description:   test allocation and freeing in variable memory pools
+//####DESCRIPTIONEND####
+
+#include <pkgconf/kernel.h>
+
+#include <cyg/kernel/sched.hxx>         // Cyg_Scheduler::start()
+#include <cyg/kernel/thread.hxx>        // Cyg_Thread
+#include <cyg/kernel/thread.inl>
+#include <cyg/kernel/sema.hxx>
+
+#include <cyg/kernel/memvar.hxx>
+
+#include <cyg/infra/testcase.h>
+
+#include <cyg/kernel/sched.inl>
+
+
+#define NTHREADS 1
+#include "testaux.hxx"
+
+static const cyg_int32 memsize = 10240;
+
+static cyg_uint8 mem[memsize];
+
+static Cyg_Mempool_Variable mempool(mem, memsize);
+
+#define NUM_PTRS 16                     // Should be even
+
+static cyg_uint8 *ptr[NUM_PTRS];
+static cyg_int32 size[NUM_PTRS];
+
+// We make a number of passes over a table of pointers which point to
+// blocks of allocated memory.  The block is freed and a new block
+// allocated.  The size and the order of the processing of blocks
+// is varied.
+static void entry( CYG_ADDRWORD data )
+{
+    cyg_uint32 s = 1;
+
+    // The number of passes that can be successfully performed
+    // depends on the fragmentation performance of the memory
+    // allocator.
+    for(cyg_ucount32 passes = 0; passes < 10; passes++) {
+
+
+        // The order which the table is processed varies according to
+        // stepsize.
+        cyg_ucount8 stepsize = (passes*2 + 1) % NUM_PTRS; // odd
+        
+
+        for(cyg_ucount8 c=0, i=0; c < NUM_PTRS; c++) {
+            i = (i+stepsize) % NUM_PTRS;
+            if(ptr[i]) {
+                for(cyg_ucount32 j=size[i];j--;) {
+                    CYG_TEST_CHECK(ptr[i][j]==i, "Memory corrupted");
+                }
+                CYG_TEST_CHECK(mempool.free(ptr[i], size[i]),
+                               "bad free");
+            }
+            s = (s*2 + 17) % 100;  // size always odds therefore non-0
+            ptr[i] = mempool.try_alloc(s);
+            size[i] = s;
+
+            CYG_TEST_CHECK(NULL != ptr[i], "Memory pool not big enough");
+            CYG_TEST_CHECK(mem<=ptr[i] && ptr[i]+s < mem+memsize,
+                           "Allocated region not within pool");
+            
+            // Scribble over memory to check whether region overlaps
+            // with other regions.  The contents of the memory are
+            // checked on freeing.  This also tests that the memory
+            // does not overlap with allocator memory structures.
+            for(cyg_ucount32 j=size[i];j--;) {
+                ptr[i][j]=i;
+            }
+        }
+    }
+    
+    CYG_TEST_PASS_FINISH("Variable memory pool 2 OK");
+}
+
+
+void memvar2_main( void )
+{
+    CYG_TEST_INIT();
+
+    new_thread(entry, 0);
+
+    for(cyg_ucount32 i = 0; i<NUM_PTRS; i++) {
+        ptr[i]      = NULL;
+    }
+
+    Cyg_Scheduler::start();
+
+    CYG_TEST_FAIL_FINISH("Not reached");
+}
+
+externC void
+cyg_start( void )
+{ 
+    memvar2_main();
+}
+// EOF memvar1.cxx