freertos源碼解析-5調度器控制

第四章講了調度器和任務切換
調度器和任務切換

爲了保證操作系統和任務安全運行，有時候需要

void vTaskSuspendAll( void )
{
	/* A critical section is not required as the variable is of type
	BaseType_t.  Please read Richard Barry's reply in the following link to a
	post in the FreeRTOS support forum before reporting this as a bug! -
	http://goo.gl/wu4acr */
	++uxSchedulerSuspended;
	portMEMORY_BARRIER();
}