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//==========================================================================

//

//        memvar2.cxx

//

//        Variable memory pool test 2

//

//==========================================================================

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//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     dsm, jlarmour

// Contributors:  

// Date:          2000-06-18

// Description:   test allocation and freeing in variable memory pools

//####DESCRIPTIONEND####

#include <pkgconf/memalloc.h>

#include <pkgconf/system.h>

#ifdef CYGPKG_KERNEL

#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/sched.inl>

#define NTHREADS 1

#include "testaux.hxx"

#endif

#include <cyg/memalloc/memvar.hxx>

#include <cyg/infra/testcase.h>

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();

    CYG_TEST_INFO("Starting Variable memory pool 2 test");

    for(cyg_ucount32 i = 0; i<NUM_PTRS; i++) {

        ptr[i]      = NULL;

    }

#ifdef CYGPKG_KERNEL

    new_thread(entry, 0);

    Cyg_Scheduler::start();

#else

    entry(0);

#endif

    CYG_TEST_FAIL_FINISH("Not reached");

}

externC void

cyg_start( void )

{

#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG

    cyg_hal_invoke_constructors();

#endif

    memvar2_main();

}

// EOF memvar2.cxx