Day-Task Management (OS)
Apr 04, 2025 am 10:00 AM
These days I rack my brains to use context to achieve task management. The code is here.
Like everything else in the project, this is another “task” for the content taught by maziero.
About implementation:
Task management systems are implemented using system context. It manages collaboration tasks by performing one task until it explicitly switches to another task.
task_t structure: represents a task that stores execution context, identifier (id) and pointers to facilitate the construction of a two-way linked queue for tasks.
typedef struct task_t
{
struct task_t *prev, *next; // ponteiros para usar em filas
int id; // identifier da tarefa
ucontext_t context; // contexto armazenado da tarefa
short status; // pronta, rodando, suspendsa, ...
// ... (outros campus ser?o adicionados mais tarde)
} task_t;
Initialization : Call the ppos_init() function to configure the main context of the program. This prepares the system to manage multiple tasks.
Task creation : Use task_init() to create a new task, where you can pass functions and parameters to execute in the new task. These tasks are given a new context and stack, and the task id is updated.
Context Switch : The task_switch() function allows you to switch between tasks, exchanging the current context with the context of the specified task.
Task Termination : A task can terminate its execution through task_exit() and return to the main context.
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