christoph/lecture-operating-system-development
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update heap demo

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churl
2022-05-09 16:27:07 +02:00
parent 25e82cefdd
commit 10d790f613
2 changed files with 15 additions and 11 deletions
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2
c_os/main.cc
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@ -42,8 +42,6 @@ int main() {
// Initialize scrollback buffer after allocator.init() // Initialize scrollback buffer after allocator.init()
kout.init(); kout.init();
allocator.dump_free_memory();
// text_demo(); // text_demo();
// sound_demo(); // sound_demo();
// keyboard_demo(); // keyboard_demo();

24
c_os/user/HeapDemo.cc
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@ -25,17 +25,19 @@ void waitForReturn() {
} }
void heap_demo() { void heap_demo() {
kout << "HEAP_DEMO ===================================================================" << endl;
/* hier muss Code eingefuegt werden */ /* hier muss Code eingefuegt werden */
allocator.dump_free_memory(); allocator.dump_free_memory();
// Some objects and forward/backward merging // Some objects and forward/backward merging
kout << "SOME OBJECTS ================================================================" << endl;
MyObj* a = new MyObj(5); MyObj* a = new MyObj(5);
// allocator.dump_free_memory(); allocator.dump_free_memory();
MyObj* b = new MyObj(10); MyObj* b = new MyObj(10);
// allocator.dump_free_memory(); allocator.dump_free_memory();
MyObj* c = new MyObj(15); MyObj* c = new MyObj(15);
// allocator.dump_free_memory(); allocator.dump_free_memory();
delete b; delete b;
allocator.dump_free_memory(); allocator.dump_free_memory();
delete a; delete a;
@ -50,8 +52,9 @@ void heap_demo() {
// allocator.dump_free_memory(); // allocator.dump_free_memory();
// Allocate too much // Allocate too much
// allocator.alloc(1024 * 1024); // should fail as only 1024 * 1024 - Headersize bytes are available kout << "TOO MUCH ====================================================================" << endl;
// allocator.dump_free_memory(); allocator.alloc(1024 * 1024); // should fail as only 1024 * 1024 - Headersize bytes are available
allocator.dump_free_memory();
// A lot of allocations // A lot of allocations
// MyObj* objs[1024]; // MyObj* objs[1024];
@ -66,8 +69,11 @@ void heap_demo() {
// allocator.dump_free_memory(); // allocator.dump_free_memory();
// Array allocation // Array allocation
// MyObj* objs = new MyObj[1024]; kout << "ARRAY =======================================================================" << endl;
// allocator.dump_free_memory(); MyObj* objs = new MyObj[1024];
// delete[] objs; allocator.dump_free_memory();
// allocator.dump_free_memory(); delete[] objs;
allocator.dump_free_memory();
kout << "HEAP_DEMO END ===============================================================" << endl;
} }