source: SVN/cambria/redboot/packages/services/memalloc/common/current/tests/memvar2.cxx @ 1

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1//==========================================================================
2//
3//        memvar2.cxx
4//
5//        Variable memory pool test 2
6//
7//==========================================================================
8//####ECOSGPLCOPYRIGHTBEGIN####
9// -------------------------------------------
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11// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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27// or inline functions from this file, or you compile this file and link it
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39//####ECOSGPLCOPYRIGHTEND####
40//==========================================================================
41//#####DESCRIPTIONBEGIN####
42//
43// Author(s):     dsm, jlarmour
44// Contributors: 
45// Date:          2000-06-18
46// Description:   test allocation and freeing in variable memory pools
47//####DESCRIPTIONEND####
48
49#include <pkgconf/memalloc.h>
50#include <pkgconf/system.h>
51
52#ifdef CYGPKG_KERNEL
53#include <pkgconf/kernel.h>
54
55#include <cyg/kernel/sched.hxx>         // Cyg_Scheduler::start()
56#include <cyg/kernel/thread.hxx>        // Cyg_Thread
57#include <cyg/kernel/thread.inl>
58#include <cyg/kernel/sema.hxx>
59
60#include <cyg/kernel/sched.inl>
61
62#define NTHREADS 1
63#include "testaux.hxx"
64
65#endif
66
67#include <cyg/memalloc/memvar.hxx>
68
69#include <cyg/infra/testcase.h>
70
71static const cyg_int32 memsize = 10240;
72
73static cyg_uint8 mem[memsize];
74
75static Cyg_Mempool_Variable mempool(mem, memsize);
76
77#define NUM_PTRS 16                     // Should be even
78
79static cyg_uint8 *ptr[NUM_PTRS];
80static cyg_int32 size[NUM_PTRS];
81
82// We make a number of passes over a table of pointers which point to
83// blocks of allocated memory.  The block is freed and a new block
84// allocated.  The size and the order of the processing of blocks
85// is varied.
86static void entry( CYG_ADDRWORD data )
87{
88    cyg_uint32 s = 1;
89
90    // The number of passes that can be successfully performed
91    // depends on the fragmentation performance of the memory
92    // allocator.
93    for(cyg_ucount32 passes = 0; passes < 10; passes++) {
94
95
96        // The order which the table is processed varies according to
97        // stepsize.
98        cyg_ucount8 stepsize = (passes*2 + 1) % NUM_PTRS; // odd
99       
100
101        for(cyg_ucount8 c=0, i=0; c < NUM_PTRS; c++) {
102            i = (i+stepsize) % NUM_PTRS;
103            if(ptr[i]) {
104                for(cyg_ucount32 j=size[i];j--;) {
105                    CYG_TEST_CHECK(ptr[i][j]==i, "Memory corrupted");
106                }
107                CYG_TEST_CHECK(mempool.free(ptr[i], size[i]),
108                               "bad free");
109            }
110            s = (s*2 + 17) % 100;  // size always odds therefore non-0
111            ptr[i] = mempool.try_alloc(s);
112            size[i] = s;
113
114            CYG_TEST_CHECK(NULL != ptr[i], "Memory pool not big enough");
115            CYG_TEST_CHECK(mem<=ptr[i] && ptr[i]+s < mem+memsize,
116                           "Allocated region not within pool");
117           
118            // Scribble over memory to check whether region overlaps
119            // with other regions.  The contents of the memory are
120            // checked on freeing.  This also tests that the memory
121            // does not overlap with allocator memory structures.
122            for(cyg_ucount32 j=size[i];j--;) {
123                ptr[i][j]=i;
124            }
125        }
126    }
127   
128    CYG_TEST_PASS_FINISH("Variable memory pool 2 OK");
129}
130
131
132void memvar2_main( void )
133{
134    CYG_TEST_INIT();
135    CYG_TEST_INFO("Starting Variable memory pool 2 test");
136
137    for(cyg_ucount32 i = 0; i<NUM_PTRS; i++) {
138        ptr[i]      = NULL;
139    }
140
141#ifdef CYGPKG_KERNEL
142    new_thread(entry, 0);
143    Cyg_Scheduler::start();
144#else
145    entry(0);
146#endif
147
148    CYG_TEST_FAIL_FINISH("Not reached");
149}
150
151externC void
152cyg_start( void )
153{ 
154#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
155    cyg_hal_invoke_constructors();
156#endif
157    memvar2_main();
158}
159// EOF memvar2.cxx
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