Example #1
0
// New returns a new Pigosat instance, ready to have literals added to it. The
// error return value need only be checked if the OutputFile option is non-nil.
func New(options *Options) (*Pigosat, error) {
	// PicoSAT * picosat_init (void);
	p := C.picosat_init()
	if options != nil {
		// void picosat_set_propagation_limit (PicoSAT *, unsigned long long limit);
		C.picosat_set_propagation_limit(p, C.ulonglong(options.PropagationLimit))
		if options.OutputFile != nil {
			cfile, err := cfdopen(options.OutputFile, "a")
			if err != nil {
				C.picosat_reset(p)
				return nil, &os.PathError{Op: "fdopen",
					Path: options.OutputFile.Name(), Err: err}
			}
			// void picosat_set_output (PicoSAT *, FILE *);
			C.picosat_set_output(p, cfile)
		}
		// void picosat_set_verbosity (PicoSAT *, int new_verbosity_level);
		C.picosat_set_verbosity(p, C.int(options.Verbosity))
		if options.Prefix != "" {
			// void picosat_set_prefix (PicoSAT *, const char *);
			prefix := C.CString(options.Prefix)
			defer C.free(unsafe.Pointer(prefix))
			C.picosat_set_prefix(p, prefix)
		}
		if options.MeasureAllCalls {
			// void picosat_measure_all_calls (PicoSAT *);
			C.picosat_measure_all_calls(p)
		}
	}
	pgo := &Pigosat{p: p, lock: sync.RWMutex{}}
	runtime.SetFinalizer(pgo, (*Pigosat).delete)
	return pgo, nil
}
Example #2
0
// delete frees memory associated with p's PicoSAT object. It only needs to be
// called from the runtime.SetFinalizer set in New.
func (p *Pigosat) delete() {
	// For some reason, SetFinalizer needs delete to be idempotent/reentrant.
	// That said, since finalizers are only run when there are no more
	// references to the object, there doesn't seem to be any point in locking.
	if p.p == nil {
		return
	}
	// void picosat_reset (PicoSAT *);
	C.picosat_reset(p.p)
	p.p = nil
}
Example #3
0
// New returns a new Pigosat instance, ready to have literals added to it. The
// error return value need only be checked if the OutputFile option is non-nil.
func New(options *Options) (*Pigosat, error) {
	// PicoSAT * picosat_init (void);
	p := C.picosat_init()
	if options != nil {
		// void picosat_set_propagation_limit (PicoSAT *, unsigned long long limit);
		prop := options.PropagationLimit
		if prop == 0 {
			prop = 1000
		}
		C.picosat_set_propagation_limit(p, C.ulonglong(prop))
		if options.OutputFile != nil {
			cfile, err := cfdopen(options.OutputFile, "a")
			if err != nil {
				C.picosat_reset(p)
				return nil, &os.PathError{Op: "fdopen",
					Path: options.OutputFile.Name(), Err: err}
			}
			// void picosat_set_output (PicoSAT *, FILE *);
			C.picosat_set_output(p, cfile)
		}
		// void picosat_set_verbosity (PicoSAT *, int new_verbosity_level);
		C.picosat_set_verbosity(p, C.int(options.Verbosity))
		if options.Prefix != "" {
			// void picosat_set_prefix (PicoSAT *, const char *);
			prefix := C.CString(options.Prefix)
			defer C.free(unsafe.Pointer(prefix))
			C.picosat_set_prefix(p, prefix)
		}
		if options.MeasureAllCalls {
			// void picosat_measure_all_calls (PicoSAT *);
			C.picosat_measure_all_calls(p)
		}
		if options.EnableTrace {
			if int(C.picosat_enable_trace_generation(p)) == 0 {
				// The cgo CFLAGS guarantee trace generation using -DTRACE.
				panic("trace generation was not enabled in build")
			}
		}
	}
	pgo := &Pigosat{p: p, lock: sync.RWMutex{}}
	runtime.SetFinalizer(pgo, (*Pigosat).delete)
	return pgo, nil
}