cpu.c

国内一位牛人自己开发的操作系统

#include"kernel.h"

void left_run_state(int thread_id)
{
	int cpu_id;
	cpu_id=os->thread[thread_id].cpu_id;
	os->thread[thread_id].cpu_id=-1;
	os->virtual_cpu.used_cpu[cpu_id].thread_id=-1;
	os->virtual_cpu.free_cpu
		[os->virtual_cpu.free_cpu_top].cpu_id=cpu_id;
	os->virtual_cpu.free_cpu_top++;
	RESET_CPU_INFORMATION(os->virtual_cpu.used_cpu[cpu_id]);
	return;
}

void enter_run_state(int thread_id)
{
	int cpu_id;

	os->virtual_cpu.free_cpu_top--;
	cpu_id=os->virtual_cpu.free_cpu
		[os->virtual_cpu.free_cpu_top].cpu_id;

	os->thread[thread_id].cpu_id=cpu_id;
	os->virtual_cpu.used_cpu[cpu_id].thread_id=thread_id;
	RESET_CPU_INFORMATION(os->virtual_cpu.used_cpu[cpu_id]);

	return;
}