74 lines
2.3 KiB
C++
Executable File
74 lines
2.3 KiB
C++
Executable File
/*****************************************************************************
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* *
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* H E A P D E M O *
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Demonstration der dynamischen Speicherverwaltung. *
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* *
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* Autor: Michael Schoettner, HHU, 27.12.2016 *
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*****************************************************************************/
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#include "user/HeapDemo.h"
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#include "kernel/Allocator.h"
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#include "kernel/Globals.h"
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#include "user/MyObj.h"
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// Hilfsfunktion: Auf Return-Taste warten
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void waitForReturn() {
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/* hier muss Code eingefuegt werden */
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Key key;
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do {
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key = kb.key_hit();
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} while ((char)key != '\n');
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}
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void heap_demo() {
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/* hier muss Code eingefuegt werden */
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allocator.dump_free_memory();
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// Some objects and forward/backward merging
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MyObj* a = new MyObj(5);
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// allocator.dump_free_memory();
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MyObj* b = new MyObj(10);
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// allocator.dump_free_memory();
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MyObj* c = new MyObj(15);
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// allocator.dump_free_memory();
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delete b;
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allocator.dump_free_memory();
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delete a;
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allocator.dump_free_memory();
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delete c;
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allocator.dump_free_memory();
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// Allocate too whole heap
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// void* ptr = allocator.alloc(1024 * 1024 - 24);
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// allocator.dump_free_memory();
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// allocator.free(ptr);
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// allocator.dump_free_memory();
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// Allocate too much
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// allocator.alloc(1024 * 1024); // should fail as only 1024 * 1024 - Headersize bytes are available
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// allocator.dump_free_memory();
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// A lot of allocations
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// MyObj* objs[1024];
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// for (unsigned int i = 0; i < 1024; ++i) {
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// objs[i] = new MyObj(5);
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// }
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// allocator.dump_free_memory();
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// waitForReturn();
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// for (unsigned int i = 0; i < 1024; ++i) {
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// delete objs[i];
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// }
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// allocator.dump_free_memory();
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// Array allocation
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// MyObj* objs = new MyObj[1024];
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// allocator.dump_free_memory();
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// delete[] objs;
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// allocator.dump_free_memory();
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}
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