/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 *

 */

//

// C++ wrapper to HPI.

//

class hpi : AllStatic {

private:

  static GetInterfaceFunc       _get_interface;

  static HPI_FileInterface*     _file;

  static HPI_SocketInterface*   _socket;

  static HPI_LibraryInterface*  _library;

  static HPI_SystemInterface*   _system;

private:

  static void initialize_get_interface(vm_calls_t *callbacks);

public:

  // Load and initialize everything except sockets.

  static jint initialize();

  // Socket library needs to be lazy intialized because eagerly

  // loading Winsock is known to cause "connect to your ISP"

  // dialog to show up.  Or so goes the legend.

  static jint initialize_socket_library();

  // HPI_FileInterface

  static inline char*  native_path(char *path);

  static inline int    file_type(const char *path);

  static inline int    open(const char *name, int mode, int perm);

  static inline int    close(int fd);

  static inline jlong  lseek(int fd, jlong off, int whence);

  static inline int    ftruncate(int fd, jlong length);

  static inline int    fsync(int fd);

  static inline int    available(int fd, jlong *bytes);

  static inline size_t read(int fd, void *buf, unsigned int nBytes);

  static inline size_t write(int fd, const void *buf, unsigned int nBytes);

  static inline int    fsize(int fd, jlong *size);

  // HPI_SocketInterface

  static inline int    socket(int domain, int type, int protocol);

  static inline int    socket_close(int fd);

  static inline int    socket_shutdown(int fd, int howto);

  static inline int    recv(int fd, char *buf, int nBytes, int flags);

  static inline int    send(int fd, char *buf, int nBytes, int flags);

  // Variant of send that doesn't support interruptible I/O

  static inline int    raw_send(int fd, char *buf, int nBytes, int flags);

  static inline int    timeout(int fd, long timeout);

  static inline int    listen(int fd, int count);

  static inline int    connect(int fd, struct sockaddr *him, int len);

  static inline int    bind(int fd, struct sockaddr *him, int len);

  static inline int    accept(int fd, struct sockaddr *him, int *len);

  static inline int    recvfrom(int fd, char *buf, int nbytes, int flags,

                                struct sockaddr *from, int *fromlen);

  static inline int    get_sock_name(int fd, struct sockaddr *him, int *len);

  static inline int    sendto(int fd, char *buf, int len, int flags,

                              struct sockaddr *to, int tolen);

  static inline int    socket_available(int fd, jint *pbytes);

  static inline int    get_sock_opt(int fd, int level, int optname,

                              char *optval, int* optlen);

  static inline int    set_sock_opt(int fd, int level, int optname,

                              const char *optval, int optlen);

  static inline int    get_host_name(char* name, int namelen);

  static inline struct hostent*  get_host_by_addr(const char* name, int len, int type);

  static inline struct hostent*  get_host_by_name(char* name);

  static inline struct protoent* get_proto_by_name(char* name);

  // HPI_LibraryInterface

  static inline void   dll_build_name(char *buf, int buf_len, const char* path,

                                      const char *name);

  static inline void*  dll_load(const char *name, char *ebuf, int ebuflen);

  static inline void   dll_unload(void *lib);

  static inline void*  dll_lookup(void *lib, const char *name);

  // HPI_SystemInterface

  static inline int    lasterror(char *buf, int len);

};

//

// Macros that provide inline bodies for the functions.

//

#define HPIDECL(name, names, intf, func, ret_type, ret_fmt, arg_type, arg_print, arg)   \

  inline ret_type hpi::name arg_type {        \

    if (TraceHPI) {                           \

      tty->print("hpi::" names "(");          \

      tty->print arg_print ;                  \

      tty->print(") = ");                     \

    }                                         \

    ret_type result = (*intf->func) arg ;     \

    if (TraceHPI) {                           \

      tty->print_cr(ret_fmt, result);         \

    }                                         \

    return result;                            \

  }

// Macro to facilitate moving HPI functionality into the vm.

// See bug 6348631.  The only difference between this macro and

// HPIDECL is that we call a vm method rather than use the HPI

// transfer vector.  Ultimately, we'll replace HPIDECL with

// VM_HPIDECL for all hpi methods.

#define VM_HPIDECL(name, names, func, ret_type, ret_fmt, arg_type,arg_print, arg)   \

  inline ret_type hpi::name arg_type {        \

    if (TraceHPI) {                           \

      tty->print("hpi::" names "(");          \

      tty->print arg_print ;                  \

      tty->print(") = ");                     \

    }                                         \

    ret_type result = func arg ;              \

    if (TraceHPI) {                           \

      tty->print_cr(ret_fmt, result);         \

    }                                         \

    return result;                            \

  }

#define VM_HPIDECL_VOID(name, names, func, arg_type, arg_print, arg)   \

  inline void  hpi::name arg_type {           \

    if (TraceHPI) {                           \

      tty->print("hpi::" names "(");          \

      tty->print arg_print;                   \

      tty->print(") = ");                     \

    }                                         \

    func arg;                                 \

  }

#define HPIDECL_VOID(name, names, intf, func, arg_type, arg_print, arg) \

  inline void hpi::name arg_type {            \

    if (TraceHPI) {                           \

      tty->print("hpi::" names "(");          \

      tty->print arg_print ;                  \

      tty->print_cr(") = void");              \

    }                                         \

    (*intf->func) arg ;                       \

  }

// The macro calls below realize into

//          inline char * hpi::native_path(...) {  inlined_body; }

// etc.

// HPI_FileInterface

HPIDECL(native_path, "native_path", _file, NativePath, char *, "%s",

        (char *path),

        ("path = %s", path),

        (path));

HPIDECL(file_type, "file_type", _file, FileType, int, "%d",

        (const char *path),

        ("path = %s", path),

        (path));

HPIDECL(open, "open", _file, Open, int, "%d",

        (const char *name, int mode, int perm),

        ("name = %s, mode = %d, perm = %d", name, mode, perm),

        (name, mode, perm));

HPIDECL(lseek, "seek", _file, Seek, jlong, "(a jlong)",

        (int fd, jlong off, int whence),

        ("fd = %d, off = (a jlong), whence = %d", fd, /* off, */ whence),

        (fd, off, whence));

HPIDECL(ftruncate, "ftruncate", _file, SetLength, int, "%d",

        (int fd, jlong length),

        ("fd = %d, length = (a jlong)", fd /*, length */),

        (fd, length));

HPIDECL(fsync, "fsync", _file, Sync, int, "%d",

        (int fd),

        ("fd = %d", fd),

        (fd));

HPIDECL(available, "available", _file, Available, int, "%d",

        (int fd, jlong *bytes),

        ("fd = %d, bytes = %p", fd, bytes),

        (fd, bytes));

HPIDECL(fsize, "fsize", _file, FileSizeFD, int, "%d",

        (int fd, jlong *size),

        ("fd = %d, size = %p", fd, size),

        (fd, size));

// HPI_LibraryInterface

VM_HPIDECL_VOID(dll_build_name, "dll_build_name", os::dll_build_name,

               (char *buf, int buf_len, const char *path, const char *name),

               ("buf = %p, buflen = %d, path = %s, name = %s",

                buf, buf_len, path, name),

               (buf, buf_len, path, name));

VM_HPIDECL(dll_load, "dll_load", os::dll_load,

        void *, "(void *)%p",

        (const char *name, char *ebuf, int ebuflen),

        ("name = %s, ebuf = %p, ebuflen = %d", name, ebuf, ebuflen),

        (name, ebuf, ebuflen));

HPIDECL_VOID(dll_unload, "dll_unload", _library, UnloadLibrary,

             (void *lib),

             ("lib = %p", lib),

             (lib));

HPIDECL(dll_lookup, "dll_lookup", _library, FindLibraryEntry, void *, "%p",

        (void *lib, const char *name),

        ("lib = %p, name = %s", lib, name),

        (lib, name));

// HPI_SystemInterface

HPIDECL(lasterror, "lasterror", _system, GetLastErrorString, int, "%d",

        (char *buf, int len),

        ("buf = %p, len = %d", buf, len),

        (buf, len));