ngcdcsFACTORY.hpp

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#ifndef ngcdcsFACTORY_H
#define ngcdcsFACTORY_H
 
 
#ifndef __cplusplus
#error This is a C++ include file and cannot be used from plain C
#endif
 
#include <ngc/core/ngcdcsCTRL.hpp>
#include <ngc/core/ngcdcsACQ.hpp>
#include <ngc/core/ngcdcsEXPDRV.hpp>

struct ngcdcs_system_t {
  ngcdcsCTRL *ctrl;

  ngcdcsACQ *acq[ngcdcsACQ_MAX_PROC];

  int numAcqMod;

  ngcdcs_system_t() {
    size_t i;
    ctrl = NULL;
    for (i=0;i<ngcdcsACQ_MAX_PROC;i++) acq[i] = NULL;
    numAcqMod = 0;
  }
};

class ngcdcsFACTORY
{
public:
  char name[64];

  void *dl;

  char module[64];

  char symbol[64];

  int busy;

  explicit ngcdcsFACTORY(const char *s) {
    Init_();
    str2str(name, s, sizeof(name) - 1);
  }

  ngcdcsFACTORY(const char *s, int closed) {
    Init_();
    str2str(name, s, sizeof(name) - 1);
    closed_ = closed;
  }

  virtual ~ngcdcsFACTORY() {}

  ngcdcsEXPDRV *Create(const char *desc, const ngcdcs_system_t &sys, 
               const ngcb_fb_t &fb) {
    ngcdcsEXPDRV *drv = Make(desc, sys, fb);
    if (drv != NULL) strcpy(drv->name, name);  // forward the driver name
    return (drv);
  }

  char *ErrMsg() {return (erms_);}

  int Closed() {return (closed_);}
protected:
  virtual ngcdcsEXPDRV *Make(const char *desc, const ngcdcs_system_t &sys, 
                 const ngcb_fb_t &fb) {
    USE(desc); USE(sys.ctrl); USE(fb);
    strcpy(ErrMsg(), "factory provides no creator method");
    return (NULL);
  }
private:
  char erms_[256];

  int closed_;

  void Init_() {
    name[0] = '\0'; module[0] = '\0'; symbol[0] = '\0'; dl = NULL; busy = 0;
    erms_[0] = '\0'; closed_ = 0;
  }
};

typedef ngcdcsFACTORY* (*ngcdcs_fmkr_t)();

#define ngcdcsEDRV_SIGNATURE ((sizeof(ngcdcsEXPDRV) & 0xffff) | \
                  (sizeof(ngcdcsFACTORY) & 0xffff) << 16)

#define NGCDCS_REGISTER_DRV(type, name) extern "C" { type name; \
  volatile unsigned long int _ngcdcs_expdrv_ ## name = ngcdcsEDRV_SIGNATURE; }

#define NGCDCS_REGISTER_LIB(name, ...) extern "C" { \
  volatile unsigned long int _ngcdcs_expdrv_ ## name = ngcdcsEDRV_SIGNATURE; \
  ngcb_str64_t name ## _LIST[] = {__VA_ARGS__, ""}; }
 
#endif