interp.c File Reference

VM Interpreter. More...

#include "pm.h"

Defines
#define	__FILE_ID__   0x09
Functions
PmReturn_t	interpret (const uint8_t returnOnNoThreads)
PmReturn_t	interp_reschedule (void)
PmReturn_t	interp_addThread (pPmFunc_t pfunc)
void	interp_setRescheduleFlag (uint8_t boolean)
Variables
PmReturn_t(*	std_nat_fxn_table [])(pPmFrame_t *)
PmReturn_t(*	usr_nat_fxn_table [])(pPmFrame_t *)

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Detailed Description

VM Interpreter.

VM interpreter operations.

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Function Documentation

PmReturn_t interp_addThread

(

pPmFunc_t

pfunc

)

Creates a thread object and adds it to the queue of threads to be executed while interpret() is running.

The given obj may be a function, module, or class. Creates a frame for the given function.

Parameters:

pfunc

Ptr to function to be executed as a thread.

Returns:

Return status

PmReturn_t interp_reschedule

(

void

)

Selects a thread to run and changes the VM internal variables to let the switch-loop execute the chosen one in the next iteration. For the moment the algorithm is primitive and will change the thread each time it is called in a round-robin fashion.

void interp_setRescheduleFlag

(

uint8_t

boolean

)

Sets the reschedule flag.

Parameters:

boolean

Reschedule on next occasion if boolean is true; clear the flag otherwise.

PmReturn_t interpret

(

const uint8_t

returnOnNoThreads

)

Interprets the available threads. Does not return.

Parameters:

returnOnNoThreads

Loop forever if 0, exit with status if no more threads left.

Returns:

Return status if called with returnOnNoThreads != 0, will not return otherwise.