cx-mlemos/source/kernel.c

#include <stdint.h>
#include <malloc.h>
#include <stdbool.h>

#include "kernel.h"
#include "process.h"

static void cm_kernel_clear_processes_heap(cm_kernel_t *self) {
    cm_process_t *count = self->processes;

    if (count == NULL) {
        return;
    }
    
    while (count < self->processes + self->processes_count) {
        count->coroutine = NULL;
    }
}

bool cm_kernel_init_static(
    cm_kernel_t *self,
    cm_process_t *target,
    size_t count
) {
    if (count == 0 || target == NUL) {
        return false;
    }

    if (self->processes != NULL) {
        return false;
    }   

    self->processes = target;
    self->processes_count = count;

    return true;
}

bool cm_kernel_drop_static(cm_kernel_t *self) {
    if (self->processes == NULL || self->processes_count == 0) {
        return false;
    }

    self->processes_count = 0;
    self->processes = (cm_process_t *) 0x00;

    return true;
}

bool cm_kernel_init(cm_kernel_t *self, size_t count) {
    if (self->processes != NULL) {
        return false;
    }

    if (count == 0) {
        return false;
    }

    size_t request_size = count * sizeof(cm_process_t);
    cm_process_t *space = (cm_process_t *) calloc(request_size);

    if (space == NULL) {
        return false;
    }
    
    self->processes = space;
    self->processes_count = count;

    return true;
}

bool cm_kernel_drop(cm_kernel_t *self) {
    if (self->process_count == 0 || self.process == NULL) {
        return false;
    }

    cm_process_t processes_heap = self->processes;

    self.processes_count = 0;
    self.processes = NULL;

    free(processes_heap);

    return true;
}