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opale_task.c

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// C Source File
// Created 05/02/05; 00:42:03

#include "opale_internal.h"

short op_TaskStart( register t_TASK* task asm("£"), register void(*taskEntryFunction)( register void* asm(" ") ) asm("¢"), register char* stackPointer asm("¡"), register unsigned char ident asm("Ð"), register void* taskFunctionArgs asm(" ") )
{

        if( runningTasks[ ident ] != NULL ) return FALSE;

        /* inits the fields of the task's structure */
        task->ident = ident;
        task->prevSleeping = NULL;
        task->nextSleeping = NULL;
        
        /* inits the task's stack */
        task->stackPointer = InitStack( taskFunctionArgs, stackPointer, taskEntryFunction );

        /* add the task to the list of tasks */
        op_EnterCriticalSection();

        runningTasks[ ident ] = task;
        addTaskToTable( readyTasks, ident );
                
        op_ExitCriticalSection();

        op_Scheduler();

        return TRUE;
}

void op_TaskStop( void )
{
unsigned char ident = currentTask->ident;
        
        op_EnterCriticalSection();
        
        runningTasks[ ident ] = NULL;
        removeTaskFromTable( readyTasks, ident );

        op_ExitCriticalSection();
        op_Scheduler();
        
}

void op_TaskWaitForTicks( register unsigned short ticks asm("Ð") )
{

        currentTask->tickDelay = ticks;
        
        op_EnterCriticalSection();
        
        currentTask->prevSleeping = &idleTask;

        if( (currentTask->nextSleeping = idleTask.nextSleeping) )
                (idleTask.nextSleeping)->prevSleeping = currentTask;
                        
        idleTask.nextSleeping = currentTask;

        removeTaskFromTable( readyTasks, currentTask->ident );
                        
        op_ExitCriticalSection();                       

        op_Scheduler();

}

/* end of file */

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