52   return true;
  53 }
  54 
  55 
  56 // On Linux, reservations are made on a page by page basis, nothing to do.
  57 inline void os::pd_split_reserved_memory(char *base, size_t size,
  58                                       size_t split, bool realloc) {
  59 }
  60 
  61 
  62 // Bang the shadow pages if they need to be touched to be mapped.
  63 inline void os::map_stack_shadow_pages(address sp) {
  64 }
  65 
  66 inline void os::dll_unload(void *lib) {
  67   ::dlclose(lib);
  68 }
  69 
  70 inline const int os::default_file_open_flags() { return 0;}
  71 
  72 inline DIR* os::opendir(const char* dirname)
  73 {
  74   assert(dirname != NULL, "just checking");
  75   return ::opendir(dirname);
  76 }
  77 
  78 inline int os::readdir_buf_size(const char *path)
  79 {
  80   return NAME_MAX + sizeof(dirent) + 1;
  81 }
  82 
  83 inline jlong os::lseek(int fd, jlong offset, int whence) {
  84   return (jlong) ::lseek64(fd, offset, whence);
  85 }
  86 
  87 inline int os::fsync(int fd) {
  88   return ::fsync(fd);
  89 }
  90 
  91 inline int os::ftruncate(int fd, jlong length) {
  92   return ::ftruncate64(fd, length);
  93 }
  94 
  95 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
  96 {
  97   assert(dirp != NULL, "just checking");
  98   return ::readdir(dirp);
  99 }
 100 
 101 inline int os::closedir(DIR *dirp) {
 102   assert(dirp != NULL, "argument is NULL");
 103   return ::closedir(dirp);
 104 }
 105 
 106 // macros for restartable system calls
 107 
 108 #define RESTARTABLE(_cmd, _result) do { \
 109     _result = _cmd; \
 110   } while(((int)_result == OS_ERR) && (errno == EINTR))
 111 
 112 #define RESTARTABLE_RETURN_INT(_cmd) do { \
 113   int _result; \
 114   RESTARTABLE(_cmd, _result); \
 115   return _result; \
 116 } while(false)
 117 
 118 inline bool os::numa_has_static_binding()   { return true; }
 119 inline bool os::numa_has_group_homing()     { return false;  }
 120 
 121 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
 122   size_t res;
 123   RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);

  52   return true;
  53 }
  54 
  55 
  56 // On Linux, reservations are made on a page by page basis, nothing to do.
  57 inline void os::pd_split_reserved_memory(char *base, size_t size,
  58                                       size_t split, bool realloc) {
  59 }
  60 
  61 
  62 // Bang the shadow pages if they need to be touched to be mapped.
  63 inline void os::map_stack_shadow_pages(address sp) {
  64 }
  65 
  66 inline void os::dll_unload(void *lib) {
  67   ::dlclose(lib);
  68 }
  69 
  70 inline const int os::default_file_open_flags() { return 0;}
  71 











  72 inline jlong os::lseek(int fd, jlong offset, int whence) {
  73   return (jlong) ::lseek64(fd, offset, whence);
  74 }
  75 
  76 inline int os::fsync(int fd) {
  77   return ::fsync(fd);
  78 }
  79 
  80 inline int os::ftruncate(int fd, jlong length) {
  81   return ::ftruncate64(fd, length);











  82 }
  83 
  84 // macros for restartable system calls
  85 
  86 #define RESTARTABLE(_cmd, _result) do { \
  87     _result = _cmd; \
  88   } while(((int)_result == OS_ERR) && (errno == EINTR))
  89 
  90 #define RESTARTABLE_RETURN_INT(_cmd) do { \
  91   int _result; \
  92   RESTARTABLE(_cmd, _result); \
  93   return _result; \
  94 } while(false)
  95 
  96 inline bool os::numa_has_static_binding()   { return true; }
  97 inline bool os::numa_has_group_homing()     { return false;  }
  98 
  99 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
 100   size_t res;
 101   RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);