The Story of Jay

Stack: Fixed memory, local variable, and function - Stack overflow() Heap: Dynamic memory // Malloc(), calloc(), realloc(), free() malloc: No initialization calloc: initialization int *B = (int*)realloc(NULL, n*sizeof(int)); // equivalent to malloc ------- Code | Global | Stack | Heap

Priority inversion is an operating system scenario in which a higher priority task is preempted by a lower priority task. Problem: Higher priority task is blocked by a lower priority one. Solutions: 1. Priority inheritance protocol: When a task blocks one or more higher-priority tasks it temporarily inherits the highest priority of the blocked tasks. - PIP does not prevent deadlock. It also cann..

Thread is a basic unit of execution so each program may have a number of processes associated with it and each process can have a number of threads executing in it. - A thread is a basic unit of CPU utilization It comprises: A thread ID/ A program counter/ A register set / A stack - It shares with other threads belonging to the same process its code section, data section and other operating-syst..

1. static ( global /function): only visible within its own translation unit. static (local variable): persistent across function calls and only visible within its function. Need the initialization. Static 은 메모리 구조에서 Data 영역에 저장이 된다. 프로그램 시작과 동시에 할당이 되고 프로그램이 종료되어야 메모리에서 지워 진다. 2. volatile: The volatile keyword prevents the compiler from performing optimization on code involving volatile objects,..