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include/boost/config/platform/vxworks.hpp  view on Meta::CPAN

#ifdef _WRS_KERNEL
#  ifndef _POSIX_TIMERS
#    define _POSIX_TIMERS  1
#  endif
#  ifndef _POSIX_THREADS
#    define _POSIX_THREADS 1
#  endif
#endif

#if (_WRS_VXWORKS_MAJOR < 7) 
// vxWorks-around: <time.h> #defines CLOCKS_PER_SEC as sysClkRateGet() but
//                 miserably fails to #include the required <sysLib.h> to make
//                 sysClkRateGet() available! So we manually include it here.
#ifdef __RTP__
#  include <time.h>
#  include <sysLib.h>
#endif

// vxWorks-around: In <stdint.h> the macros INT32_C(), UINT32_C(), INT64_C() and
//                 UINT64_C() are defined erroneously, yielding not a signed/
//                 unsigned long/long long type, but a signed/unsigned int/long
//                 type. Eventually this leads to compile errors in ratio_fwd.hpp,
//                 when trying to define several constants which do not fit into a
//                 long type! We correct them here by redefining.

#include <cstdint>

// Some macro-magic to do the job
#define VX_JOIN(X, Y)     VX_DO_JOIN(X, Y)
#define VX_DO_JOIN(X, Y)  VX_DO_JOIN2(X, Y)
#define VX_DO_JOIN2(X, Y) X##Y

// Correctly setup the macros
#undef  INT32_C
#undef  UINT32_C
#undef  INT64_C
#undef  UINT64_C
#define INT32_C(x)  VX_JOIN(x, L)
#define UINT32_C(x) VX_JOIN(x, UL)
#define INT64_C(x)  VX_JOIN(x, LL)
#define UINT64_C(x) VX_JOIN(x, ULL)

// #include Libraries required for the following function adaption
#include <sys/time.h>
#endif  // _WRS_VXWORKS_MAJOR < 7

#include <ioLib.h>
#include <tickLib.h>

// Use C-linkage for the following helper functions
#ifdef __cplusplus
extern "C" {
#endif

// vxWorks-around: The required functions getrlimit() and getrlimit() are missing.
//                 But we have the similar functions getprlimit() and setprlimit(),
//                 which may serve the purpose.
//                 Problem: The vxWorks-documentation regarding these functions
//                 doesn't deserve its name! It isn't documented what the first two
//                 parameters idtype and id mean, so we must fall back to an educated
//                 guess - null, argh... :-/

// TODO: getprlimit() and setprlimit() do exist for RTPs only, for whatever reason.
//       Thus for DKMs there would have to be another implementation.
#if defined ( __RTP__) &&  (_WRS_VXWORKS_MAJOR < 7)
  inline int getrlimit(int resource, struct rlimit *rlp){
    return getprlimit(0, 0, resource, rlp);
  }

  inline int setrlimit(int resource, const struct rlimit *rlp){
    return setprlimit(0, 0, resource, const_cast<struct rlimit*>(rlp));
  }
#endif

// vxWorks has ftruncate() only, so we do simulate truncate():
inline int truncate(const char *p, off_t l){
  int fd = open(p, O_WRONLY);
  if (fd == -1){
    errno = EACCES;
    return -1;
  }
  if (ftruncate(fd, l) == -1){
    close(fd);
    errno = EACCES;
    return -1;
  }
  return close(fd);
}

#ifdef __GNUC__
#define ___unused __attribute__((unused))
#else
#define ___unused
#endif

// Fake symlink handling by dummy functions:
inline int symlink(const char* path1 ___unused, const char* path2 ___unused){
  // vxWorks has no symlinks -> always return an error!
  errno = EACCES;
  return -1;
}

inline ssize_t readlink(const char* path1 ___unused, char* path2 ___unused, size_t size ___unused){
  // vxWorks has no symlinks -> always return an error!
  errno = EACCES;
  return -1;
}

#if (_WRS_VXWORKS_MAJOR < 7)

inline int gettimeofday(struct timeval *tv, void * /*tzv*/) {
  struct timespec ts;
  clock_gettime(CLOCK_MONOTONIC, &ts);
  tv->tv_sec  = ts.tv_sec;
  tv->tv_usec = ts.tv_nsec / 1000;
  return 0;
}
#endif

#ifdef __cplusplus
} // extern "C"